diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
index 5ef89efdcb6..dbfd42e696e 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
@@ -18704,6 +18704,42 @@ public class FirLightTreeBlackBoxCodegenTestGenerated extends AbstractFirLightTr
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated.java
index b9e53ad925c..5775a32f9b6 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated.java
@@ -18704,6 +18704,42 @@ public class FirLightTreeBlackBoxCodegenWithIrFakeOverrideGeneratorTestGenerated
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
index 5f0d0918f2e..6a51247950c 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
@@ -18704,6 +18704,42 @@ public class FirPsiBlackBoxCodegenTestGenerated extends AbstractFirPsiBlackBoxCo
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt b/compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt
new file mode 100644
index 00000000000..cdd32f321fd
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt
@@ -0,0 +1,18 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+inline fun foo(x: () -> Unit): String {
+    x()
+    return "OK"
+}
+
+fun String.id(s: String = this, vararg xs: Int): String = s
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    // CHECK-LABEL: entry
+    // CHECK-NOT: call %struct.ObjHeader* @AllocInstance
+    // CHECK-NOT: alloca
+    return foo("Fail"::id)
+    // CHECK-LABEL: epilogue:
+}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/atomics.kt b/compiler/testData/codegen/box/fileCheck/atomics.kt
similarity index 72%
rename from kotlin-native/backend.native/tests/filecheck/atomics.kt
rename to compiler/testData/codegen/box/fileCheck/atomics.kt
index 4b37ef47673..0a2a852bd5c 100644
--- a/kotlin-native/backend.native/tests/filecheck/atomics.kt
+++ b/compiler/testData/codegen/box/fileCheck/atomics.kt
@@ -1,17 +1,19 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
 import kotlin.concurrent.*
 
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{signext i8|i8}} @"kfun:#<get-byteGlobal>(){}kotlin.Byte"()
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#<get-byteGlobal>(){}kotlin.Byte"()
+// CHECK-DEFAULTABI-LABEL: define signext i8 @"kfun:#<get-byteGlobal>(){}kotlin.Byte"()
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#<get-byteGlobal>(){}kotlin.Byte"()
 // CHECK: load atomic i8, i8* @"kvar:byteGlobal#internal" seq_cst
 // CHECK-LABEL: define void @"kfun:#<set-byteGlobal>(kotlin.Byte){}"(i8
 // CHECK: store atomic i8 %{{[0-9]+}}, i8* @"kvar:byteGlobal#internal" seq_cst
 @Volatile var byteGlobal: Byte = 42
 
-// CHECK-LABEL: define {{signext i16|i16}} @"kfun:#<get-shortGlobal>(){}kotlin.Short"()
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#<get-shortGlobal>(){}kotlin.Short"()
+// CHECK-DEFAULTABI-LABEL: define signext i16 @"kfun:#<get-shortGlobal>(){}kotlin.Short"()
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#<get-shortGlobal>(){}kotlin.Short"()
 // CHECK: load atomic i16, i16* @"kvar:shortGlobal#internal" seq_cst
 // CHECK-LABEL: define void @"kfun:#<set-shortGlobal>(kotlin.Short){}"(i16
 // CHECK: store atomic i16 %{{[0-9]+}}, i16* @"kvar:shortGlobal#internal" seq_cst
@@ -29,7 +31,9 @@ import kotlin.concurrent.*
 // CHECK: store atomic i64 %{{[0-9]+}}, i64* @"kvar:longGlobal#internal" seq_cst
 @Volatile var longGlobal: Long = 42
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#<get-booleanGlobal>(){}kotlin.Boolean"()
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#<get-booleanGlobal>(){}kotlin.Boolean"()
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#<get-booleanGlobal>(){}kotlin.Boolean"()
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#<get-booleanGlobal>(){}kotlin.Boolean"()
 // CHECK: load atomic i8, i8* @"kvar:booleanGlobal#internal" seq_cst
 // CHECK-LABEL: define void @"kfun:#<set-booleanGlobal>(kotlin.Boolean){}"(i1
 // CHECK: store atomic i8 %{{[0-9]+}}, i8* @"kvar:booleanGlobal#internal" seq_cst
@@ -39,23 +43,31 @@ import kotlin.concurrent.*
 fun byteGlobal_getField() = byteGlobal
 fun byteGlobal_setField() { byteGlobal = 0 }
 
-// CHECK-LABEL: define {{signext i8|i8}} @"kfun:#byteGlobal_getAndSetField(){}kotlin.Byte"()
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#byteGlobal_getAndSetField(){}kotlin.Byte"()
+// CHECK-DEFAULTABI-LABEL: define signext i8 @"kfun:#byteGlobal_getAndSetField(){}kotlin.Byte"()
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#byteGlobal_getAndSetField(){}kotlin.Byte"()
 // CHECK: atomicrmw xchg i8* @"kvar:byteGlobal#internal", i8 0 seq_cst
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun byteGlobal_getAndSetField() = ::byteGlobal.getAndSetField(0.toByte())
 
-// CHECK-LABEL: define {{signext i8|i8}} @"kfun:#byteGlobal_getAndAddField(){}kotlin.Byte"()
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#byteGlobal_getAndAddField(){}kotlin.Byte"()
+// CHECK-DEFAULTABI-LABEL: define signext i8 @"kfun:#byteGlobal_getAndAddField(){}kotlin.Byte"()
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#byteGlobal_getAndAddField(){}kotlin.Byte"()
 // CHECK: atomicrmw add i8* @"kvar:byteGlobal#internal", i8 0 seq_cst
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun byteGlobal_getAndAddField() = ::byteGlobal.getAndAddField(0.toByte())
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#byteGlobal_compareAndSetField(){}kotlin.Boolean"()
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#byteGlobal_compareAndSetField(){}kotlin.Boolean"()
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#byteGlobal_compareAndSetField(){}kotlin.Boolean"()
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#byteGlobal_compareAndSetField(){}kotlin.Boolean"()
 // CHECK: cmpxchg i8* @"kvar:byteGlobal#internal", i8 0, i8 1 seq_cst seq_cst
 // CHECK: extractvalue { i8, i1 } %{{[0-9]+}}, 1
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun byteGlobal_compareAndSetField() = ::byteGlobal.compareAndSetField(0.toByte(), 1.toByte())
 
-// CHECK-LABEL: define {{signext i8|i8}} @"kfun:#byteGlobal_compareAndExchangeField(){}kotlin.Byte"()
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#byteGlobal_compareAndExchangeField(){}kotlin.Byte"()
+// CHECK-DEFAULTABI-LABEL: define signext i8 @"kfun:#byteGlobal_compareAndExchangeField(){}kotlin.Byte"()
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#byteGlobal_compareAndExchangeField(){}kotlin.Byte"()
 // CHECK: cmpxchg i8* @"kvar:byteGlobal#internal", i8 0, i8 1 seq_cst seq_cst
 // CHECK: extractvalue { i8, i1 } %{{[0-9]+}}, 0
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
@@ -65,23 +77,31 @@ fun byteGlobal_compareAndExchangeField() = ::byteGlobal.compareAndExchangeField(
 fun shortGlobal_getField() = shortGlobal
 fun shortGlobal_setField() { shortGlobal = 0 }
 
-// CHECK-LABEL: define {{signext i16|i16}} @"kfun:#shortGlobal_getAndSetField(){}
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#shortGlobal_getAndSetField(){}
+// CHECK-DEFAULTABI-LABEL: define signext i16 @"kfun:#shortGlobal_getAndSetField(){}
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#shortGlobal_getAndSetField(){}
 // CHECK: atomicrmw xchg i16* @"kvar:shortGlobal#internal", i16 0 seq_cst
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun shortGlobal_getAndSetField() = ::shortGlobal.getAndSetField(0.toShort())
 
-// CHECK-LABEL: define {{signext i16|i16}} @"kfun:#shortGlobal_getAndAddField(){}
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#shortGlobal_getAndAddField(){}
+// CHECK-DEFAULTABI-LABEL: define signext i16 @"kfun:#shortGlobal_getAndAddField(){}
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#shortGlobal_getAndAddField(){}
 // CHECK: atomicrmw add i16* @"kvar:shortGlobal#internal", i16 0 seq_cst
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun shortGlobal_getAndAddField() = ::shortGlobal.getAndAddField(0.toShort())
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#shortGlobal_compareAndSetField(){}
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#shortGlobal_compareAndSetField(){}
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#shortGlobal_compareAndSetField(){}
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#shortGlobal_compareAndSetField(){}
 // CHECK: cmpxchg i16* @"kvar:shortGlobal#internal", i16 0, i16 1 seq_cst seq_cst
 // CHECK: extractvalue { i16, i1 } %{{[0-9]+}}, 1
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun shortGlobal_compareAndSetField() = ::shortGlobal.compareAndSetField(0.toShort(), 1.toShort())
 
-// CHECK-LABEL: define {{signext i16|i16}} @"kfun:#shortGlobal_compareAndExchangeField(){}
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#shortGlobal_compareAndExchangeField(){}
+// CHECK-DEFAULTABI-LABEL: define signext i16 @"kfun:#shortGlobal_compareAndExchangeField(){}
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#shortGlobal_compareAndExchangeField(){}
 // CHECK: cmpxchg i16* @"kvar:shortGlobal#internal", i16 0, i16 1 seq_cst seq_cst
 // CHECK: extractvalue { i16, i1 } %{{[0-9]+}}, 0
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
@@ -101,7 +121,9 @@ fun intGlobal_getAndSetField() = ::intGlobal.getAndSetField(0)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun intGlobal_getAndAddField() = ::intGlobal.getAndAddField(0)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#intGlobal_compareAndSetField(){}
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#intGlobal_compareAndSetField(){}
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#intGlobal_compareAndSetField(){}
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#intGlobal_compareAndSetField(){}
 // CHECK: cmpxchg i32* @"kvar:intGlobal#internal", i32 0, i32 1 seq_cst seq_cst
 // CHECK: extractvalue { i32, i1 } %{{[0-9]+}}, 1
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
@@ -127,7 +149,9 @@ fun longGlobal_getAndSetField() = ::longGlobal.getAndSetField(0L)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun longGlobal_getAndAddField() = ::longGlobal.getAndAddField(0L)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#longGlobal_compareAndSetField(){}
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#longGlobal_compareAndSetField(){}
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#longGlobal_compareAndSetField(){}
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#longGlobal_compareAndSetField(){}
 // CHECK: cmpxchg i64* @"kvar:longGlobal#internal", i64 0, i64 1 seq_cst seq_cst
 // CHECK: extractvalue { i64, i1 } %{{[0-9]+}}, 1
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
@@ -143,18 +167,24 @@ fun longGlobal_compareAndExchangeField() = ::longGlobal.compareAndExchangeField(
 fun booleanGlobal_getField() = booleanGlobal
 fun booleanGlobal_setField() { booleanGlobal = false }
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#booleanGlobal_getAndSetField(){}kotlin.Boolean"
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#booleanGlobal_getAndSetField(){}kotlin.Boolean"
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#booleanGlobal_getAndSetField(){}kotlin.Boolean"
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#booleanGlobal_getAndSetField(){}kotlin.Boolean"
 // CHECK: atomicrmw xchg i8* @"kvar:booleanGlobal#internal", i8 %{{[0-9]+}} seq_cst
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun booleanGlobal_getAndSetField() = ::booleanGlobal.getAndSetField(false)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#booleanGlobal_compareAndSetField(){}
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#booleanGlobal_compareAndSetField(){}
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#booleanGlobal_compareAndSetField(){}
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#booleanGlobal_compareAndSetField(){}
 // CHECK: cmpxchg i8* @"kvar:booleanGlobal#internal", i8 %{{[0-9]+}}, i8 %{{[0-9]+}} seq_cst seq_cst
 // CHECK: extractvalue { i8, i1 } %{{[0-9]+}}, 1
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun booleanGlobal_compareAndSetField() = ::booleanGlobal.compareAndSetField(false, true)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#booleanGlobal_compareAndExchangeField(){}
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#booleanGlobal_compareAndExchangeField(){}
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#booleanGlobal_compareAndExchangeField(){}
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#booleanGlobal_compareAndExchangeField(){}
 // CHECK: cmpxchg i8* @"kvar:booleanGlobal#internal", i8 %{{[0-9]+}}, i8 %{{[0-9]+}} seq_cst seq_cst
 // CHECK: extractvalue { i8, i1 } %{{[0-9]+}}, 0
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
@@ -194,7 +224,9 @@ fun intArr_getAndAdd() = intArr.getAndAdd(0, 1)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun intArr_compareAndExchange() = intArr.compareAndExchange(0, 1, 2)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#intArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#intArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#intArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#intArr_compareAndSet(){}kotlin.Boolean"()
 // CHECK: call i32* @Kotlin_intArrayGetElementAddress(%struct.ObjHeader* %{{[0-9]+}}, i32 0)
 // CHECK: cmpxchg i32* %{{[0-9]+}}, i32 1, i32 2 seq_cst seq_cst
 // CHECK: extractvalue { i32, i1 } %{{[0-9]+}}, 1
@@ -235,7 +267,9 @@ fun longArr_getAndAdd() = longArr.getAndAdd(0, 1L)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun longArr_compareAndExchange() = longArr.compareAndExchange(0, 1L, 2L)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#longArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#longArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#longArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#longArr_compareAndSet(){}kotlin.Boolean"()
 // CHECK: call i64* @Kotlin_longArrayGetElementAddress(%struct.ObjHeader* %{{[0-9]+}}, i32 0)
 // CHECK: cmpxchg i64* %{{[0-9]+}}, i64 1, i64 2 seq_cst seq_cst
 // CHECK: extractvalue { i64, i1 } %{{[0-9]+}}, 1
@@ -269,13 +303,18 @@ fun refArr_getAndSet() = refArr.getAndSet(0, null)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun refArr_compareAndExchange() = refArr.compareAndExchange(0, null, null)
 
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:#refArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#refArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#refArr_compareAndSet(){}kotlin.Boolean"()
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#refArr_compareAndSet(){}kotlin.Boolean"()
 // CHECK: call %struct.ObjHeader** @Kotlin_arrayGetElementAddress(%struct.ObjHeader* %{{[0-9]+}}, i32 0)
-// CHECK: call {{zeroext i1|i1}} @CompareAndSetVolatileHeapRef(%struct.ObjHeader** %{{[0-9]+}}, %struct.ObjHeader* null, %struct.ObjHeader* null)
+// CHECK-AAPCS: call i1 @CompareAndSetVolatileHeapRef(%struct.ObjHeader** %{{[0-9]+}}, %struct.ObjHeader* null, %struct.ObjHeader* null)
+// CHECK-DEFAULTABI: call zeroext i1 @CompareAndSetVolatileHeapRef(%struct.ObjHeader** %{{[0-9]+}}, %struct.ObjHeader* null, %struct.ObjHeader* null)
+// CHECK-WINDOWSX64: call zeroext i1 @CompareAndSetVolatileHeapRef(%struct.ObjHeader** %{{[0-9]+}}, %struct.ObjHeader* null, %struct.ObjHeader* null)
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 fun refArr_compareAndSet() = refArr.compareAndSet(0, null, null)
 
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     byteGlobal_getField()
     byteGlobal_setField()
     byteGlobal_getAndSetField()
@@ -329,4 +368,5 @@ fun main() {
     refArr_getAndSet()
     refArr_compareAndSet()
     refArr_compareAndExchange()
+    return "OK"
 }
diff --git a/kotlin-native/backend.native/tests/filecheck/bce.kt b/compiler/testData/codegen/box/fileCheck/bce.kt
similarity index 97%
rename from kotlin-native/backend.native/tests/filecheck/bce.kt
rename to compiler/testData/codegen/box/fileCheck/bce.kt
index dc2ae07d908..bf243a709d8 100644
--- a/kotlin-native/backend.native/tests/filecheck/bce.kt
+++ b/compiler/testData/codegen/box/fileCheck/bce.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 // CHECK-LABEL: define void @"kfun:#forEachIndicies(){}"()
 fun forEachIndicies() {
@@ -310,8 +308,9 @@ fun chainedReceivers() {
 }
 // CHECK-LABEL: {{^}}epilogue:
 
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
 @ExperimentalStdlibApi
-fun main() {
+fun box(): String {
     forEachIndicies()
     forUntilSize()
     forRangeUntilSize()
@@ -334,4 +333,6 @@ fun main() {
     topLevelProperty()
     childClassWithFakeOverride()
     chainedReceivers()
+
+    return "OK"
 }
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/constants_merge.kt b/compiler/testData/codegen/box/fileCheck/constants_merge.kt
similarity index 92%
rename from kotlin-native/backend.native/tests/filecheck/constants_merge.kt
rename to compiler/testData/codegen/box/fileCheck/constants_merge.kt
index 087d828b5f0..8b18d040240 100644
--- a/kotlin-native/backend.native/tests/filecheck/constants_merge.kt
+++ b/compiler/testData/codegen/box/fileCheck/constants_merge.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 import kotlin.reflect.*
 
@@ -14,7 +12,8 @@ import kotlin.reflect.*
 // CHECK: internal unnamed_addr constant { %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader*, i1 } { %struct.ObjHeader { %struct.TypeInfo* {{.*}} }, %struct.ObjHeader* getelementptr inbounds ({ %struct.ObjHeader, i8* }, { %struct.ObjHeader, i8* }* [[REG_FOR_CLASSIFIER_FIELD:@[0-9]+]], i32 0, i32 0), %struct.ObjHeader* getelementptr inbounds ({ %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader* }, { %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader* }* [[REG_FOR_ARGUMENTS_FIELD:@[0-9]+]], i32 0, i32 0), i1 false }
 // CHECK-NOT: internal unnamed_addr constant { %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader*, i1 } { %struct.ObjHeader { %struct.TypeInfo* {{.*}} }, %struct.ObjHeader* getelementptr inbounds ({ %struct.ObjHeader, i8* }, { %struct.ObjHeader, i8* }* [[REG_FOR_CLASSIFIER_FIELD]], i32 0, i32 0), %struct.ObjHeader* getelementptr inbounds ({ %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader* }, { %struct.ObjHeader, %struct.ObjHeader*, %struct.ObjHeader* }* [[REG_FOR_ARGUMENTS_FIELD]], i32 0, i32 0), i1 false }
 
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     println(1024)
     println(1024)
 
@@ -23,4 +22,5 @@ fun main() {
 
     println(typeOf<Map<String, String>>())
     println(typeOf<Map<String, String>>())
-}
\ No newline at end of file
+    return "OK"
+}
diff --git a/kotlin-native/backend.native/tests/filecheck/default_parameters_dont_box.kt b/compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt
similarity index 69%
rename from kotlin-native/backend.native/tests/filecheck/default_parameters_dont_box.kt
rename to compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt
index 89cedb8dcdc..c40e6db4a90 100644
--- a/kotlin-native/backend.native/tests/filecheck/default_parameters_dont_box.kt
+++ b/compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 value class A(val i: Int)
 value class B(val a: A)
@@ -12,8 +10,8 @@ fun defaultA(a: A = A(1), aa: A = A(1)) = a.i
 fun defaultB(b: B = B(A(1)), bb: B = B(A(1))) = b.a.i
 fun defaultC(c: C = C("1"), cc: C = C("1")) = c.s
 
-// CHECK-LABEL: "kfun:#main(){}"
-fun main(){
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     // CHECK-LABEL: entry
     // CHECK-NOT: <Int-box>
     // CHECK-NOT: <A-box>
@@ -32,5 +30,6 @@ fun main(){
     defaultA(A(1), A(1))
     defaultB(B(A(1)), B(A(1)))
     defaultC(C("1"), C("1"))
-    // CHECK-LABEL: epilogue
+    // CHECK-LABEL: epilogue:
+    return "OK"
 }
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/enum_when.kt b/compiler/testData/codegen/box/fileCheck/enum_when.kt
similarity index 60%
rename from kotlin-native/backend.native/tests/filecheck/enum_when.kt
rename to compiler/testData/codegen/box/fileCheck/enum_when.kt
index d7a7259284c..5d5458f1f41 100644
--- a/kotlin-native/backend.native/tests/filecheck/enum_when.kt
+++ b/compiler/testData/codegen/box/fileCheck/enum_when.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 enum class COLOR {
     RED,
@@ -9,24 +7,22 @@ enum class COLOR {
     BLUE
 }
 
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     for (i in COLOR.values()) {
-        // CHECK: = call i32 @"kfun:kotlin.Enum#<get-ordinal>(){}kotlin.Int"(
+        // CHECK-DEBUG: = call i32 @"kfun:kotlin.Enum#<get-ordinal>(){}kotlin.Int"(
         // We inline .ordinal property access in case of opt build, so check direct field load instead.
         // CHECK-OPT: getelementptr inbounds %"kclassbody:kotlin.Enum#internal", %"kclassbody:kotlin.Enum#internal"* %{{[0-9a-z]*}}, i32 0, i32 2
         print(when (i) {
             // we can't check the register is same, because it can be saved on stack and loaded back
             // CHECK: icmp eq i32 %{{[0-9a-z]*}}, 0
-            // CHECK-OPT: icmp eq i32 %{{[0-9a-z]*}}, 0
             COLOR.RED -> 0xff0000
             // CHECK: icmp eq i32 %{{[0-9a-z]*}}, 1
-            // CHECK-OPT: icmp eq i32 %{{[0-9a-z]*}}, 1
             COLOR.GREEN -> 0x00ff00
             // CHECK: icmp eq i32 %{{[0-9a-z]*}}, 2
-            // CHECK-OPT: icmp eq i32 %{{[0-9a-z]*}}, 2
             COLOR.BLUE -> 0x0000ff
         })
     }
     // CHECK-LABEL: epilogue:
+    return "OK"
 }
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fileCheck/escape_analysis.kt b/compiler/testData/codegen/box/fileCheck/escape_analysis.kt
new file mode 100644
index 00000000000..d3ba93f4a57
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/escape_analysis.kt
@@ -0,0 +1,14 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+class A(val x: Int)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    // CHECK-DEBUG: call %struct.ObjHeader* @AllocInstance
+    // CHECK-OPT: alloca %"kclassbody:A#internal"
+    val a = A(5)
+    println(a.x)
+// CHECK-LABEL: epilogue:
+    return "OK"
+}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/force_arm_instruction_set.kt b/compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt
similarity index 65%
rename from kotlin-native/backend.native/tests/filecheck/force_arm_instruction_set.kt
rename to compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt
index d48719b83dc..f4973e21792 100644
--- a/kotlin-native/backend.native/tests/filecheck/force_arm_instruction_set.kt
+++ b/compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt
@@ -1,7 +1,8 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+
+// Perform check after optimization pipeline because
+// LLVM might infer attributes.
+// FILECHECK_STAGE: LTOBitcodeOptimization
 
 // NB: This is not a good test.
 // What we actually want to check is that Kotlin/Native compiler is able to produce "big"
@@ -11,10 +12,8 @@
 // Instead, here we check that none of the module's functions are compiled in the Thumb mode.
 // BL instructions in thumb mode have smaller ranges which causes "relocation out of range" failure.
 
-// CHECK: target triple = "armv7k-apple-watchos{{.+}}"
+// CHECK-WATCHOS_ARM32: target triple = "armv7k-apple-watchos2{{.+}}"
 
-fun main() {
-    println("hello")
-}
+fun box() = "OK"
 
 // CHECK-NOT: attributes #{{[0-9]+}} = { {{.+}}+thumb-mode{{.+}} }
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/function_attributes_at_callsite.kt b/compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt
similarity index 65%
rename from kotlin-native/backend.native/tests/filecheck/function_attributes_at_callsite.kt
rename to compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt
index 3596041d663..ac2b2862a0b 100644
--- a/kotlin-native/backend.native/tests/filecheck/function_attributes_at_callsite.kt
+++ b/compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 // CHECK: declare void @ThrowException(%struct.ObjHeader*) #[[THROW_EXCEPTION_DECLARATION_ATTRIBUTES:[0-9]+]]
 
@@ -11,10 +9,16 @@ fun flameThrower(): Nothing {
     throw Throwable("🔥")
 }
 
-// CHECK-LABEL: void @"kfun:#main(){}"()
-fun main() {
-    // CHECK: call void @"kfun:#flameThrower(){}kotlin.Nothing"() #[[FLAME_THROWER_CALLSITE_ATTRIBUTES:[0-9]+]]
-    flameThrower()
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+
+    // CHECK: invoke void @"kfun:#flameThrower(){}kotlin.Nothing"() #[[FLAME_THROWER_CALLSITE_ATTRIBUTES:[0-9]+]]
+    try {
+        flameThrower()
+    } catch (e: Throwable) {
+        return "OK"
+    }
+    return "FAIL: Uncaught exception"
 }
 
 // CHECK-DAG: attributes #[[THROW_EXCEPTION_DECLARATION_ATTRIBUTES]] = {{{.*}}noreturn{{.*}}}
diff --git a/kotlin-native/backend.native/tests/filecheck/generic_function_references.kt b/compiler/testData/codegen/box/fileCheck/generic_function_references.kt
similarity index 69%
rename from kotlin-native/backend.native/tests/filecheck/generic_function_references.kt
rename to compiler/testData/codegen/box/fileCheck/generic_function_references.kt
index 54dbc58cc0c..1e00ec44b74 100644
--- a/kotlin-native/backend.native/tests/filecheck/generic_function_references.kt
+++ b/compiler/testData/codegen/box/fileCheck/generic_function_references.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 import kotlin.reflect.KFunction2
 
@@ -49,7 +47,8 @@ fun <QuxTP> bar() {
     println(ref)
 }
 
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     println(stringifyArray(arrayOf(N(2), N(14))))
     println(stringifyIntArray(arrayOf(1, 2, 3)))
 
@@ -58,6 +57,7 @@ fun main() {
 
     val ref: KFunction2<Int, Int, Unit> = ::foo // $foo$FUNCTION_REFERENCE$5
     println(ref)
+    return "OK"
 }
 
 // CHECK-LABEL: define internal i32 @"kfun:$stringifyArray$lambda$0$FUNCTION_REFERENCE$0.invoke#internal"
@@ -68,18 +68,21 @@ fun main() {
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$stringifyArray$lambda$0$FUNCTION_REFERENCE$0.$<bridge-BNNN>invoke(kotlin.Array<1:0>){}kotlin.Int#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[array:%[0-9]+]], %struct.ObjHeader** {{%[0-9]+}})
-// CHECK: call i32 @"kfun:$stringifyArray$lambda$0$FUNCTION_REFERENCE$0.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]])
+// CHECK-OPT: call i32 @"kfun:$stringifyArray$lambda$0$FUNCTION_REFERENCE$0.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]])
+// CHECK-DEBUG: call i32 @"kfun:$stringifyArray$lambda$0$FUNCTION_REFERENCE$0.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$1.invoke#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[array:%[0-9]+]], i32 [[index:%[0-9]+]], %struct.ObjHeader** [[ret:%[0-9]+]])
-// CHECK: call %struct.ObjHeader* @Kotlin_Array_get(%struct.ObjHeader* [[array]], i32 [[index]], %struct.ObjHeader** [[ret]])
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_Array_get(%struct.ObjHeader* [[array]], i32 [[index]], %struct.ObjHeader** [[ret]])
+// CHECK-DEBUG: call %struct.ObjHeader* @Kotlin_Array_get(%struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}}, %struct.ObjHeader** {{%[0-9]+}})
 
 // CHECK-LABEL: define internal void @"kfun:$get$FUNCTION_REFERENCE$1.<init>#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$1.$<bridge-NNNNB>invoke(kotlin.Array<*>;kotlin.Int){}kotlin.Any?#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[array:%[0-9]+]], %struct.ObjHeader* [[boxedIndex:%[0-9]+]], %struct.ObjHeader** [[ret:%[0-9]+]])
-// CHECK: call %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$1.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]], i32 {{%[0-9]+}}, %struct.ObjHeader** [[ret]])
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$1.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]], i32 {{%[0-9]+}}, %struct.ObjHeader** [[ret]])
+// CHECK-DEBUG: call %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$1.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}}, %struct.ObjHeader** {{%[0-9]+}})
 
 // CHECK-LABEL: define internal i32 @"kfun:$stringifyIntArray$lambda$1$FUNCTION_REFERENCE$2.invoke#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
@@ -89,7 +92,8 @@ fun main() {
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$stringifyIntArray$lambda$1$FUNCTION_REFERENCE$2.$<bridge-BNNN>invoke(kotlin.Array<kotlin.Int>){}kotlin.Int#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[array:%[0-9]+]], %struct.ObjHeader** {{%[0-9]+}})
-// CHECK: call i32 @"kfun:$stringifyIntArray$lambda$1$FUNCTION_REFERENCE$2.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]])
+// CHECK-OPT: call i32 @"kfun:$stringifyIntArray$lambda$1$FUNCTION_REFERENCE$2.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]])
+// CHECK-DEBUG: call i32 @"kfun:$stringifyIntArray$lambda$1$FUNCTION_REFERENCE$2.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal i32 @"kfun:$get$FUNCTION_REFERENCE$3.invoke#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}})
@@ -99,18 +103,21 @@ fun main() {
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$get$FUNCTION_REFERENCE$3.$<bridge-BNNNB>invoke(kotlin.Array<kotlin.Int>;kotlin.Int){}kotlin.Int#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[array:%[0-9]+]], %struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader** {{%[0-9]+}})
-// CHECK: call i32 @"kfun:$get$FUNCTION_REFERENCE$3.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]], i32 {{%[0-9]+}})
+// CHECK-OPT: call i32 @"kfun:$get$FUNCTION_REFERENCE$3.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[array]], i32 {{%[0-9]+}})
+// CHECK-DEBUG: call i32 @"kfun:$get$FUNCTION_REFERENCE$3.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}})
 
 // CHECK-LABEL: define internal void @"kfun:$foo$FUNCTION_REFERENCE$4.invoke#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* [[p1:%[0-9]+]], %struct.ObjHeader* [[p2:%[0-9]+]])
-// CHECK: call void @"kfun:#foo(0:0;0:1){0\C2\A7<kotlin.Any?>;1\C2\A7<kotlin.Any?>}"(%struct.ObjHeader* [[p1]], %struct.ObjHeader* [[p2]])
+// CHECK-OPT: call void @"kfun:#foo(0:0;0:1){0\C2\A7<kotlin.Any?>;1\C2\A7<kotlin.Any?>}"(%struct.ObjHeader* [[p1]], %struct.ObjHeader* [[p2]])
+// CHECK-DEBUG: call void @"kfun:#foo(0:0;0:1){0\C2\A7<kotlin.Any?>;1\C2\A7<kotlin.Any?>}"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal void @"kfun:$foo$FUNCTION_REFERENCE$4.<init>#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$foo$FUNCTION_REFERENCE$4.$<bridge-UNNNN>invoke(1:0;1:0){}#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* [[p1:%[0-9]+]], %struct.ObjHeader* [[p2:%[0-9]+]], %struct.ObjHeader** {{%[0-9]+}})
-// CHECK: call void @"kfun:$foo$FUNCTION_REFERENCE$4.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[p1]], %struct.ObjHeader* [[p2]])
+// CHECK-OPT: call void @"kfun:$foo$FUNCTION_REFERENCE$4.invoke#internal"(%struct.ObjHeader* [[this]], %struct.ObjHeader* [[p1]], %struct.ObjHeader* [[p2]])
+// CHECK-DEBUG: call void @"kfun:$foo$FUNCTION_REFERENCE$4.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
 
 // CHECK-LABEL: define internal void @"kfun:$foo$FUNCTION_REFERENCE$5.invoke#internal"
 // CHECK-SAME: (%struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}}, i32 {{%[0-9]+}})
@@ -121,4 +128,5 @@ fun main() {
 
 // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:$foo$FUNCTION_REFERENCE$5.$<bridge-UNNBB>invoke(kotlin.Int;kotlin.Int){}#internal"
 // CHECK-SAME: (%struct.ObjHeader* [[this:%[0-9]+]], %struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader** {{%[0-9]+}})
-// CHECK: call void @"kfun:$foo$FUNCTION_REFERENCE$5.invoke#internal"(%struct.ObjHeader* [[this]], i32 {{%[0-9]+}}, i32 {{%[0-9]+}})
+// CHECK-OPT: call void @"kfun:$foo$FUNCTION_REFERENCE$5.invoke#internal"(%struct.ObjHeader* [[this]], i32 {{%[0-9]+}}, i32 {{%[0-9]+}})
+// CHECK-DEBUG: call void @"kfun:$foo$FUNCTION_REFERENCE$5.invoke#internal"(%struct.ObjHeader* {{%[0-9]+}}, i32 {{%[0-9]+}}, i32 {{%[0-9]+}})
diff --git a/kotlin-native/backend.native/tests/filecheck/intrinsics.kt b/compiler/testData/codegen/box/fileCheck/intrinsics.kt
similarity index 54%
rename from kotlin-native/backend.native/tests/filecheck/intrinsics.kt
rename to compiler/testData/codegen/box/fileCheck/intrinsics.kt
index ab00fa8e161..480bb617f9e 100644
--- a/kotlin-native/backend.native/tests/filecheck/intrinsics.kt
+++ b/compiler/testData/codegen/box/fileCheck/intrinsics.kt
@@ -1,25 +1,26 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 // CHECK-LABEL: "kfun:#and(kotlin.Int;kotlin.Int){}kotlin.Int"
 fun and(a: Int, b: Int): Int {
     // CHECK: and {{.*}}, {{.*}}
     return a and b
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
 }
 
 // CHECK-LABEL: "kfun:#ieee754(kotlin.Float;kotlin.Float){}kotlin.Boolean"
 fun ieee754(a: Float, b: Float): Boolean {
     // CHECK: fcmp oeq float {{.*}}, {{.*}}
     return a == b
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
 }
 
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     val x = and(1, 2)
     val y = ieee754(0.0f, 1.0f)
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
+    return if (x == 0 && !y)
+        "OK"
+    else "FAIL x=$x y=$y"
 }
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_class.kt b/compiler/testData/codegen/box/fileCheck/kt49847_class.kt
new file mode 100644
index 00000000000..4c224fd82b7
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_class.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+class C {
+    fun foo(x: Int) = x
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-OPT-NOT: Int-box
+// CHECK-DEBUG: Int-box
+// CHECK-NOT: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+    val c = C()
+    val fooref = c::foo
+    val result = fooref(42)
+    return if( result == 42)
+        "OK"
+    else
+        "FAIL: $result"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_generic.kt b/compiler/testData/codegen/box/fileCheck/kt49847_generic.kt
new file mode 100644
index 00000000000..e2a0268e351
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_generic.kt
@@ -0,0 +1,20 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+class C<T> {
+    fun foo(x: T) = x
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-NOT: Int-box
+// CHECK-OPT-NOT: Int-unbox
+// CHECK-DEBUG: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+    val c = C<Int>()
+    val fooref = c::foo
+    return if (fooref(42) == 42)
+        "OK"
+    else
+        "FAIL"
+}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_generic_receiver.kt b/compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt
similarity index 59%
rename from kotlin-native/backend.native/tests/filecheck/kt49847_generic_receiver.kt
rename to compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt
index 521291e1630..a17cb8da2b4 100644
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_generic_receiver.kt
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt
@@ -1,24 +1,25 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 fun <T> T.foo() { println(this) }
 
 // CHECK-LABEL: define void @"kfun:#bar(0:0){0\C2\A7<kotlin.Any?>}"
 // CHECK-SAME: (%struct.ObjHeader* [[x:%[0-9]+]])
 fun <BarTP> bar(x: BarTP) {
-    // CHECK: call void @"kfun:$foo$FUNCTION_REFERENCE$0.<init>#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* [[x]])
+    // CHECK-OPT: call void @"kfun:$foo$FUNCTION_REFERENCE$0.<init>#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* [[x]])
+    // CHECK-DEBUG: call void @"kfun:$foo$FUNCTION_REFERENCE$0.<init>#internal"(%struct.ObjHeader* {{%[0-9]+}}, %struct.ObjHeader* {{%[0-9]+}})
     println(x::foo)
 }
 
-// CHECK-LABEL: define void @"kfun:#main(){}"
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     // CHECK: call void @"kfun:$foo$FUNCTION_REFERENCE$1.<init>#internal"(%struct.ObjHeader* {{%[0-9]+}}, i32 5)
     println(5::foo)
 
     bar("hello")
     bar(42)
+    return "OK"
+// CHECK-LABEL: epilogue:
 }
 
 // CHECK-LABEL: define internal void @"kfun:$foo$FUNCTION_REFERENCE$0.<init>#internal"
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt
new file mode 100644
index 00000000000..47cc5068384
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt
@@ -0,0 +1,23 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+fun interface Foo {
+    fun bar(x: Int): Any
+}
+
+fun baz(x: Any): Int = x.hashCode()
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// Boxing needs to be used now due to non-devirtualized call
+// CHECK-OPT: Int-box
+
+// CHECK-NOT: Int-box
+// CHECK-NOT: Int-unbox
+// CHECK-LABEL: epilogue:
+
+fun box(): String {
+    val foo: Foo = Foo(::baz)
+    return if (foo.bar(42) == 42)
+        "OK"
+    else "FAIL"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt
new file mode 100644
index 00000000000..ac7d1661a36
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt
@@ -0,0 +1,19 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+fun interface Foo<T> {
+    fun bar(x: T): Any
+}
+
+fun baz(x: Any): Int = x.hashCode()
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-NOT: Int-box
+// CHECK-NOT: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+    val foo: Foo<Int> = Foo(::baz)
+    return if (foo.bar(42) == 42)
+        "OK"
+    else "FAIL"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt
new file mode 100644
index 00000000000..be0f7fc4f74
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+fun interface Foo {
+    fun bar(x: Int): Int
+}
+
+fun baz(x: Int): Int = x.hashCode()
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-OPT-NOT: Int-box
+// CHECK-DEBUG: Int-box
+// CHECK-NOT: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+    val foo: Foo = Foo(::baz)
+    val result = foo.bar(42)
+    return if( result == 42 )
+        "OK"
+    else "FAIL: $result"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt
new file mode 100644
index 00000000000..65d2465c656
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+fun interface Foo<T> {
+    fun bar(x: T): Int
+}
+
+fun baz(x: Any): Int = x.hashCode()
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-OPT-NOT: Int-box
+// CHECK-DEBUG: Int-box
+// CHECK-NOT: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+    val foo: Foo<Int> = Foo(::baz)
+    val result = foo.bar(42)
+    return if( result == 42 )
+        "OK"
+    else "FAIL: $result"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt b/compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt
new file mode 100644
index 00000000000..bfd7bfc987b
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt
@@ -0,0 +1,22 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+fun plus1(x: Int) = x + 1
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-OPT-NOT: Int-box
+// CHECK-OPT-NOT: Int-unbox
+// CHECK-DEBUG: Int-box
+// CHECK-DEBUG: Int-unbox
+// CHECK-LABEL: epilogue:
+fun box(): String {
+
+    val ref = ::plus1
+    var y = 0
+    repeat(100000) {
+        y += ref(it)  // Should be devirtualized and invoked without boxing/unboxing (`Int-box`/`Int-unbox`)
+    }
+    if (y != 705082704)
+        return "FAIL $y != 705082704"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt
new file mode 100644
index 00000000000..ce4e658a8cd
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt
@@ -0,0 +1,73 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+import kotlin.native.concurrent.*
+import kotlinx.cinterop.*
+
+val arr: Array<String> = arrayOf("1")
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+@kotlinx.cinterop.ExperimentalForeignApi
+fun box(): String {
+    println(arr.size.toByte() == arr[0].toByte())
+    println(arr.size.toUByte() == arr[0].toUByte())
+    println(arr.size.toShort() == arr[0].toShort())
+    println(arr.size.toUShort() == arr[0].toUShort())
+    println(arr.size.toInt() == arr[0].toInt())
+    println(arr.size.toUInt() == arr[0].toUInt())
+    println(arr.size.toLong() == arr[0].toLong())
+    println(arr.size.toULong() == arr[0].toULong())
+    println(arr.size.toFloat() == arr[0].toFloat())
+    println(arr.size.toDouble() == arr[0].toDouble())
+    println(Char(arr.size) == arr[0][0])
+    println((arr.size == 1) == (arr[0] == "1")) // Boolean
+
+    memScoped {
+        val var1: IntVar = alloc()
+        val var2: IntVar = alloc()
+        println(var1.ptr.rawValue == var2.ptr.rawValue)
+    }
+
+    println(Result.success(arr.size) == Result.success(arr[0].toInt()))
+    println(vectorOf(arr.size, arr.size, arr.size, arr.size) == vectorOf(arr[0].toInt(), arr[0].toInt(), arr[0].toInt(), arr[0].toInt()))
+
+    val w1 = Worker.start()
+    val w2 = Worker.start()
+    println(w1 == w2)
+
+    val f1 = w1.requestTermination()
+    val f2 = w2.requestTermination()
+    println(f1 == f2)
+
+    f1.result
+    f2.result
+
+    return "OK"
+}
+// CHECK-OPT-NOT: {{call|invoke}} i64 @"kfun:kotlin#<Long-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} i64 @"kfun:kotlin#<ULong-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} i32 @"kfun:kotlin#<Int-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} i32 @"kfun:kotlin#<UInt-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} {{signext i16|i16}} @"kfun:kotlin#<Short-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} {{zeroext i16|i16}} @"kfun:kotlin#<UShort-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} {{signext i8|i8}} @"kfun:kotlin#<Byte-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} {{zeroext i8|i8}} @"kfun:kotlin#<UByte-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} {{zeroext i16|i16}} @"kfun:kotlin#<Char-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} {{zeroext i1|i1}} @"kfun:kotlin#<Boolean-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} double @"kfun:kotlin#<Double-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} float @"kfun:kotlin#<Float-unbox>
+
+// CHECK-OPT-NOT: {{call|invoke}} i8* @"kfun:kotlin.native.internal#<NativePtr-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} i32 @"kfun:kotlin.native.concurrent#<Future-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} i32 @"kfun:kotlin.native.concurrent#<Worker-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} <4 x float> @"kfun:kotlin.native#<Vector128-unbox>
+// CHECK-OPT-NOT: {{call|invoke}} %struct.ObjHeader* @"kfun:kotlin#<Result-unbox>
+
+// CHECK-LABEL: epilogue:
+// On APPLE targets, generated functions <T>ToNSNumber may contain non-converted invocations of unbox functions.
+// CHECK-APPLE: {{IntToNSNumber|LongToNSNumber|ByteToNSNumber|ShortToNSNumber|FloatToNSNumber|DoubleToNSNumber}}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt
new file mode 100644
index 00000000000..26cc50c2ba8
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt
@@ -0,0 +1,22 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+import kotlinx.cinterop.*
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlinx.cinterop.CPointer#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlinx.cinterop.CPointer#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlinx.cinterop.CPointer#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-OPT: call i8* @"kfun:kotlinx.cinterop#<CPointer-unbox>(kotlin.Any?){}kotlinx.cinterop.CPointer<-1:0>?"
+
+// CHECK-DEBUG-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-DEBUG: [[var1:%[0-9]+]] = invoke i8* @"kfun:kotlinx.cinterop#<get-ptr>
+// CHECK-DEBUG: [[var2:%[0-9]+]] = invoke i8* @"kfun:kotlinx.cinterop#<get-ptr>
+// CHECK-DEBUG: = icmp eq i8* [[var1]], [[var2]]
+// CHECK-DEBUG-LABEL: epilogue:
+
+@kotlinx.cinterop.ExperimentalForeignApi
+fun box(): String = memScoped {
+    val var1: IntVar = alloc()
+    val var2: IntVar = alloc()
+    return if (var1.ptr == var2.ptr) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt
new file mode 100644
index 00000000000..72ecf2b59cf
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt
@@ -0,0 +1,19 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+import kotlinx.cinterop.*
+
+// CHECK-OPT-LABEL: define i8* @"kfun:kotlinx.cinterop#interpretOpaquePointed(kotlin.native.internal.NativePtr){}kotlinx.cinterop.NativePointed"(i8* %0)
+// CHECK-OPT: call i8* @"kfun:kotlinx.cinterop#<NativePointed-unbox>(kotlin.Any?){}kotlinx.cinterop.NativePointed?"
+
+// CHECK-DEBUG-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-AAPCS-DEBUG: call i1 @IsSubtype(%struct.TypeInfo* %{{[0-9]+}}, %struct.TypeInfo* getelementptr inbounds ({{.*}}@"kclass:kotlinx.cinterop.NativePointed", i32 0, i32 0))
+// CHECK-DEFAULTABI-DEBUG: call zeroext i1 @IsSubtype(%struct.TypeInfo* %{{[0-9]+}}, %struct.TypeInfo* @"kclass:kotlinx.cinterop.NativePointed")
+// CHECK-WINDOWSX64-DEBUG: call zeroext i1 @IsSubtype(%struct.TypeInfo* %{{[0-9]+}}, %struct.TypeInfo* getelementptr inbounds ({{.*}}@"kclass:kotlinx.cinterop.NativePointed", i32 0, i32 0))
+// CHECK-DEBUG-LABEL: epilogue:
+
+@kotlinx.cinterop.ExperimentalForeignApi
+fun box(): String = memScoped {
+    val var1: NativePointed = alloc(4, 4)
+    return if (interpretOpaquePointed(var1.rawPtr) is NativePointed) "OK" else "FAIL"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt
new file mode 100644
index 00000000000..0acdc20151d
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt
@@ -0,0 +1,24 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+import kotlinx.cinterop.*
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlin.native.internal.NonNullNativePtr#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlin.native.internal.NonNullNativePtr#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlin.native.internal.NonNullNativePtr#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-OPT: call i8* @"kfun:kotlin.native.internal#<NonNullNativePtr-unbox>(kotlin.Any?){}kotlin.native.internal.NonNullNativePtr?"
+
+// CHECK-DEBUG-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+// CHECK-AAPCS-DEBUG: invoke i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEFAULTABI-DEBUG: invoke zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-WINDOWSX64-DEBUG: invoke zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEBUG-LABEL: epilogue:
+
+@kotlinx.cinterop.ExperimentalForeignApi
+fun box(): String = memScoped {
+    val var1: IntVar = alloc()
+    val var2: IntVar = alloc()
+    // The first one is K1, the second one is K2.
+    @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+    return if (var1.ptr.value as Any == var2.ptr.value as Any) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt
new file mode 100644
index 00000000000..e13abba8ca6
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt
@@ -0,0 +1,30 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+import kotlinx.cinterop.*
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlinx.cinterop.StableRef#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlinx.cinterop.StableRef#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlinx.cinterop.StableRef#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
+
+// CHECK-OPT: call i8* @"kfun:kotlinx.cinterop#<StableRef-unbox>(kotlin.Any?){}kotlinx.cinterop.StableRef<-1:0>?"
+
+// CHECK-OPT-LABEL: epilogue:
+
+
+// CHECK-DEBUG-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+
+// CHECK-DEBUG: [[result:%[0-9]+]] = icmp eq i8*
+// CHECK-DEBUG: store i1 [[result]], i1* %isEqual
+
+// CHECK-DEBUG-LABEL: epilogue:
+
+@kotlinx.cinterop.ExperimentalForeignApi
+fun box(): String {
+    val ref1 = StableRef.create(Any())
+    val ref2 = StableRef.create(Any())
+    val isEqual = ref1 == ref2
+    ref2.dispose()
+    ref1.dispose()
+    return if (!isEqual) "OK" else "FAIL"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt
new file mode 100644
index 00000000000..6462cc5327d
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlin.UByteArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UByteArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UByteArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:kotlin#<UByteArray-unbox>(kotlin.Any?){}kotlin.UByteArray?"
+// CHECK-AAPCS-DEBUG: call i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEFAULTABI-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-WINDOWSX64-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+
+// CHECK-LABEL: epilogue:
+
+fun box(): String {
+    val arr1 = UByteArray(10) { it.toUByte() }
+    val arr2 = UByteArray(10) { (it / 2).toUByte() }
+    return if (arr1 == arr2) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt
new file mode 100644
index 00000000000..4ee27064953
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlin.UIntArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UIntArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UIntArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:kotlin#<UIntArray-unbox>(kotlin.Any?){}kotlin.UIntArray?"
+// CHECK-AAPCS-DEBUG: call i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEFAULTABI-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-WINDOWSX64-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+
+// CHECK-LABEL: epilogue:
+
+fun box(): String {
+    val arr1 = UIntArray(10) { it.toUInt() }
+    val arr2 = UIntArray(10) { (it / 2).toUInt() }
+    return if (arr1 == arr2) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt
new file mode 100644
index 00000000000..9e878798f35
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlin.ULongArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlin.ULongArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlin.ULongArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:kotlin#<ULongArray-unbox>(kotlin.Any?){}kotlin.ULongArray?"
+// CHECK-AAPCS-DEBUG: call i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEFAULTABI-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-WINDOWSX64-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+
+// CHECK-LABEL: epilogue:
+
+fun box(): String {
+    val arr1 = ULongArray(10) { it.toULong() }
+    val arr2 = ULongArray(10) { (it / 2).toULong() }
+    return if (arr1 == arr2) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt
new file mode 100644
index 00000000000..888ab68739a
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-AAPCS-OPT-LABEL: define i1 @"kfun:kotlin.UShortArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UShortArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-OPT-LABEL: define zeroext i1 @"kfun:kotlin.UShortArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:kotlin#<UShortArray-unbox>(kotlin.Any?){}kotlin.UShortArray?"
+// CHECK-AAPCS-DEBUG: call i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-DEFAULTABI-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+// CHECK-WINDOWSX64-DEBUG: call zeroext i1 @"kfun:kotlin.Any#equals(kotlin.Any?){}kotlin.Boolean-trampoline"
+
+// CHECK-LABEL: epilogue:
+
+fun box(): String {
+    val arr1 = UShortArray(10) { it.toUShort() }
+    val arr2 = UShortArray(10) { (it / 2).toUShort() }
+    return if (arr1 == arr2) "FAIL" else "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt
new file mode 100644
index 00000000000..c82f8f3b23f
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt
@@ -0,0 +1,12 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-AAPCS-LABEL: define i1 @"kfun:C#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:C#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:C#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
+// CHECK: call %struct.ObjHeader* @"kfun:#<C-unbox>(kotlin.Any?){}C?"
+value class C(val x: Any)
+// Note: <C-unbox> is also called from bridges for equals, hashCode and toString.
+
+fun box() =
+    if (C(42) == C(13)) "FAIL" else "OK"
diff --git a/kotlin-native/backend.native/tests/filecheck/kt58654.kt b/compiler/testData/codegen/box/fileCheck/kt58654.kt
similarity index 65%
rename from kotlin-native/backend.native/tests/filecheck/kt58654.kt
rename to compiler/testData/codegen/box/fileCheck/kt58654.kt
index d30edda6490..ee332b79837 100644
--- a/kotlin-native/backend.native/tests/filecheck/kt58654.kt
+++ b/compiler/testData/codegen/box/fileCheck/kt58654.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 // CHECK-LABEL: define i64 @"kfun:#foo(){}kotlin.Long"()
 fun foo(): Long {
@@ -28,7 +26,11 @@ fun callBar(f: Boolean): ULong {
 }
 // CHECK: ret i64
 
-fun main() {
-    println(foo())
-    println(callBar(true))
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    val resultFoo = foo()
+    val resultBar = callBar(false)
+    return if (resultFoo == 0L && resultBar == 1UL)
+        "OK"
+    else "FAIL: resultFoo=$resultFoo resultBar=$resultBar"
 }
diff --git a/kotlin-native/backend.native/tests/filecheck/no_frame_on_constant_object_access.kt b/compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt
similarity index 67%
rename from kotlin-native/backend.native/tests/filecheck/no_frame_on_constant_object_access.kt
rename to compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt
index b8bc03c032b..752f1692474 100644
--- a/kotlin-native/backend.native/tests/filecheck/no_frame_on_constant_object_access.kt
+++ b/compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 object A {
     const val x = 5
@@ -31,7 +29,11 @@ fun g() {
 // CHECK: {{^}}epilogue:
 
 
-fun main() {
-    f()
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    val f = f()
+    if (f != 12)
+        return "FAIL: $f != 12"
     g()
+    return "OK"
 }
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/replace_invoke_with_call.kt b/compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt
similarity index 50%
rename from kotlin-native/backend.native/tests/filecheck/replace_invoke_with_call.kt
rename to compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt
index 4c1ebb24c4a..c548d22249a 100644
--- a/kotlin-native/backend.native/tests/filecheck/replace_invoke_with_call.kt
+++ b/compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 fun flameThrower() {
     throw Throwable("🔥")
@@ -11,7 +9,7 @@ fun flameThrower() {
 fun f1() {
     // CHECK: call void @"kfun:#flameThrower(){}"()
     flameThrower()
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
 }
 
 // CHECK-LABEL: "kfun:#f2(){}"
@@ -20,12 +18,15 @@ fun f2() {
         // CHECK: invoke void @"kfun:#flameThrower(){}"()
         flameThrower()
     } catch (t: Throwable) {}
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
 }
 
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
-    f1()
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    try {
+        f1()
+    } catch (t: Throwable) {}
     f2()
-// CHECK-LABEL: epilogue
+// CHECK-LABEL: epilogue:
+    return "OK"
 }
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt b/compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt
new file mode 100644
index 00000000000..f393def42b1
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt
@@ -0,0 +1,157 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-DEFAULTABI-LABEL: define zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
+// CHECK-AAPCS-LABEL: define i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 %0)
+// CHECK-WINDOWSX64-LABEL: define zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
+fun id(arg: Boolean): Boolean {
+    return arg
+}
+
+// CHECK-DEFAULTABI-LABEL: define signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext %0)
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
+fun id(arg: Byte): Byte {
+    return arg
+}
+
+// CHECK-DEFAULTABI-LABEL: define zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext %0)
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
+fun id(arg: Char): Char {
+    return arg
+}
+
+// CHECK-DEFAULTABI-LABEL: define signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext %0)
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
+fun id(arg: Short): Short {
+    return arg
+}
+
+// CHECK-LABEL: define i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
+fun id(arg: Int): Int {
+    return arg
+}
+
+// CHECK-LABEL: define i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
+fun id(arg: Long): Long {
+    return arg
+}
+
+// CHECK-LABEL: define float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
+fun id(arg: Float): Float {
+    return arg
+}
+
+// CHECK-LABEL: define double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
+fun id(arg: Double): Double {
+    return arg
+}
+
+// CHECK-DEFAULTABI-LABEL: define zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext %0)
+// CHECK-AAPCS-LABEL: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
+// CHECK-WINDOWSX64-LABEL: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
+fun id(arg: UByte): UByte {
+    return arg
+}
+
+// CHECK-DEFAULTABI-LABEL: define zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext %0)
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
+fun id(arg: UShort): UShort {
+    return arg
+}
+
+// CHECK-LABEL: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
+fun id(arg: UInt): UInt {
+    return arg
+}
+
+// CHECK-LABEL: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
+fun id(arg: ULong): ULong {
+    return arg
+}
+
+fun checkPrimitives() {
+    // CHECK-DEFAULTABI: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
+    // CHECK-AAPCS: call i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 {{.*}})
+    // CHECK-WINDOWSX64: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
+    id(true)
+    // CHECK-DEFAULTABI: call signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext {{.*}})
+    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
+    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
+    id(0.toByte())
+    // CHECK-DEFAULTABI: call zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
+    id('a')
+    // CHECK-DEFAULTABI: call signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
+    id(0.toShort())
+    // CHECK: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
+    id(0)
+    // CHECK: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
+    id(0L)
+    // CHECK: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
+    id(0.5f)
+    // CHECK: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
+    id(0.5)
+    // CHECK-DEFAULTABI: call zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext {{.*}})
+    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
+    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
+    id(0.toUByte())
+    // CHECK-DEFAULTABI: call zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
+    id(0.toUShort())
+    // CHECK: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
+    id(15u)
+    // CHECK: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
+    id(15uL)
+}
+
+value class CharWrapper(val ch: Char)
+
+// CHECK-DEFAULTABI-LABEL: define zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext %0)
+// CHECK-AAPCS-LABEL: define i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
+// CHECK-WINDOWSX64-LABEL: define i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
+fun id(arg: CharWrapper): CharWrapper {
+    return arg
+}
+
+// Check that value classes doesn't affect parameter attributes
+
+fun checkInlineClasses() {
+    // CHECK-DEFAULTABI: call zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
+    id(CharWrapper('c'))
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+fun nullableId(arg: Byte?): Byte? {
+    return arg
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+fun nullableId(arg: CharWrapper?): CharWrapper? {
+    return arg
+}
+
+// Check that we don't pass primitive-specific attributes to their boxes
+fun checkBoxes() {
+    // CHECK: call %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    nullableId(1.toByte())
+    // CHECK: call %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    nullableId(CharWrapper('a'))
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    checkPrimitives()
+    checkInlineClasses()
+    checkBoxes()
+    return "OK"
+}
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fileCheck/single_tls_load.kt b/compiler/testData/codegen/box/fileCheck/single_tls_load.kt
new file mode 100644
index 00000000000..4ea95363c54
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/single_tls_load.kt
@@ -0,0 +1,29 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: OptimizeTLSDataLoads
+
+class Wrapper(x: Int)
+
+// CHECK-LABEL: define internal fastcc %struct.ObjHeader* @"kfun:#f(kotlin.Int;kotlin.String){}kotlin.String"
+fun f(x: Int, s: String): String {
+    // CHECK: _ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E
+    // CHECK-NOT: _ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E
+    if (x < 0) throw IllegalStateException()
+    if (x > 0) return f(x - 1, s)
+    val b = Wrapper(2)
+    val a = listOf(x, x, Wrapper(1), 2, x)
+    return buildString {
+        for (i in a) { appendLine("$s i") }
+    }
+// CHECK-LABEL: epilogue:
+}
+
+fun box(): String {
+    val result = f(10, "123456")
+    return if (result == "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n")
+        "OK"
+    else "FAIL: $result"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/smoke0.kt b/compiler/testData/codegen/box/fileCheck/smoke0.kt
new file mode 100644
index 00000000000..ddc4d793e29
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/smoke0.kt
@@ -0,0 +1,18 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+// CHECK-LABEL: "kfun:#id(kotlin.Any?){}kotlin.Any?"
+fun id(a: Any?): Any? {
+    return a
+// CHECK-LABEL: epilogue:
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    // CHECK: call %struct.ObjHeader* @"kfun:#id(kotlin.Any?){}kotlin.Any?"
+    val x = id("Hello")
+    // CHECK: call void @"kfun:kotlin.io#println(kotlin.Any?){}"(%struct.ObjHeader* {{.*}})
+    println(x)
+// CHECK-LABEL: epilogue:
+    return "OK"
+}
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt
new file mode 100644
index 00000000000..3aedc9c7cff
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt
@@ -0,0 +1,114 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+package codegen.stringConcatenationTypeNarrowing.kt53119_append_generated
+import kotlin.test.*
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeAny
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK: ret %struct.ObjHeader*
+
+fun maybeAnyMaybeAny(maybeAny1: Any?, maybeAny2: Any?): String {
+    return "$maybeAny1,$maybeAny2"
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeString
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun maybeAnyMaybeString(maybeAny1: Any?, maybeString2: String?): String {
+    return "$maybeAny1,$maybeString2"
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyString
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun maybeAnyString(maybeAny1: Any?, string: String): String {
+    return "$maybeAny1,$string"
+}
+
+data class Foo(val bar: Int)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyFoo
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun maybeAnyFoo(maybeAny: Any?, foo: Foo): String {
+    return "$maybeAny,$foo"
+}
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeFoo
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun maybeAnyMaybeFoo(maybeAny: Any?, foo: Foo?): String {
+    return "$maybeAny,$foo"
+}
+
+fun box(): String {
+    val foo = Foo(42)
+    val res1 = maybeAnyMaybeAny(foo, foo)
+    if (res1 != "Foo(bar=42),Foo(bar=42)") return "FAIL1: $res1"
+    val res2 = maybeAnyMaybeAny(null, null)
+    if (res2 != "null,null") return "FAIL2: $res2"
+    val res3 = maybeAnyMaybeString(foo, "bar")
+    if (res3 != "Foo(bar=42),bar") return "FAIL3: $res3"
+    val res4 = maybeAnyMaybeString(null, null)
+    if (res4 != "null,null") return "FAIL4: $res4"
+    val res5 = maybeAnyString(foo, "bar")
+    if (res5 != "Foo(bar=42),bar") return "FAIL5: $res5"
+    val res6 = maybeAnyString(null, "bar")
+    if (res6 != "null,bar") return "FAIL6: $res6"
+    val res7 = maybeAnyFoo(foo, foo)
+    if (res7 != "Foo(bar=42),Foo(bar=42)") return "FAIL7: $res7"
+    val res8 = maybeAnyFoo(null, foo)
+    if (res8 != "null,Foo(bar=42)") return "FAIL8: $res8"
+    val res9 = maybeAnyMaybeFoo(foo, foo)
+    if (res9 != "Foo(bar=42),Foo(bar=42)") return "FAIL9: $res9"
+    val res10 = maybeAnyMaybeFoo(foo, null)
+    if (res10 != "Foo(bar=42),null") return "FAIL10: $res10"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt
new file mode 100644
index 00000000000..01226c149e4
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt
@@ -0,0 +1,98 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+package codegen.stringConcatenationTypeNarrowing.kt53119_append_manual
+import kotlin.test.*
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendMaybeAny(kotlin.Any?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK: ret %struct.ObjHeader*
+
+fun appendMaybeAny(maybeAny: Any?): String {
+    val sb = kotlin.text.StringBuilder()
+    sb.append(maybeAny)
+    return sb.toString()
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendAny(kotlin.Any)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun appendAny(any: Any): String {
+    val sb = kotlin.text.StringBuilder()
+    sb.append(any)
+    return sb.toString()
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendMaybeString(kotlin.String?)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String
+
+// CHECK: ret %struct.ObjHeader*
+
+fun appendMaybeString(maybeStr: String?): String {
+    val sb = kotlin.text.StringBuilder()
+    sb.append(maybeStr)
+    return sb.toString()
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendString(kotlin.String)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String
+
+// CHECK: ret %struct.ObjHeader*
+
+fun appendString(str: String): String {
+    val sb = kotlin.text.StringBuilder()
+    sb.append(str)
+    return sb.toString()
+}
+
+data class Foo(val bar: Int)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendFoo(codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo)
+// CHECK-OPT: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
+
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
+// CHECK: ret %struct.ObjHeader*
+
+fun appendFoo(foo: Foo): String {
+    val sb = kotlin.text.StringBuilder()
+    sb.append(foo)
+    return sb.toString()
+}
+
+fun box(): String {
+    val foo = Foo(42)
+    val res1 = appendMaybeAny(foo)
+    if (res1 != "Foo(bar=42)") return "FAIL1: $res1"
+    val res2 = appendMaybeAny(null)
+    if (res2 != "null") return "FAIL2: $res2"
+    val res3 = appendAny(foo)
+    if (res3 != "Foo(bar=42)") return "FAIL3: $res3"
+    val res4 = appendMaybeString("foo")
+    if (res4 != "foo") return "FAIL4: $res4"
+    val res5 = appendMaybeString(null)
+    if (res5 != "null") return "FAIL5: $res5"
+    val res6 = appendString("foo")
+    if (res6 != "foo") return "FAIL6: $res6"
+    val res7 = appendFoo(foo)
+    if (res7 != "Foo(bar=42)") return "FAIL7: $res7"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt
new file mode 100644
index 00000000000..db3f8f39270
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt
@@ -0,0 +1,132 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+package codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension
+import kotlin.test.*
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#manualPlusExtensionAny
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+
+// CHECK: ret %struct.ObjHeader*
+
+fun manualPlusExtensionAny(maybeStr: String?, maybeAny: kotlin.Any?): kotlin.String =
+        maybeStr + maybeAny
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#manualPlusExtensionString
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun manualPlusExtensionString(maybeStr: String?, str: String): kotlin.String =
+        maybeStr + str
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionAny
+// CHECK-OPT-NOT: kfun:kotlin#plus__at__kotlin.String?(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin#plus__at__kotlin.String?(kotlin.Any?)
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusExtensionAny(maybeStr: String?, maybeAny: Any?): String {
+    return "$maybeStr$maybeAny"
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionString
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusExtensionString(maybeStr: String?, str: String): String {
+    return "$maybeStr$str"
+}
+
+data class Foo(val bar: Int)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionFoo
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusExtensionFoo(maybeStr: String?, foo: Foo): String {
+    return "$maybeStr$foo"
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionMaybeFoo
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusExtensionMaybeFoo(maybeStr: String?, foo: Foo?): String {
+    return "$maybeStr$foo"
+}
+
+fun box(): String {
+    val foo = Foo(42)
+    val res1 = manualPlusExtensionAny("foo", foo)
+    if (res1 != "fooFoo(bar=42)") return "FAIL1: $res1"
+    val res2 = manualPlusExtensionAny(null, null)
+    if (res2 != "nullnull") return "FAIL2: $res2"
+    val res3 = manualPlusExtensionString("foo", "bar")
+    if (res3 != "foobar") return "FAIL3: $res3"
+    val res4 = manualPlusExtensionString(null, "bar")
+    if (res4 != "nullbar") return "FAIL4: $res4"
+    val res5 = generatedPlusExtensionAny("foo", foo)
+    if (res5 != "fooFoo(bar=42)") return "FAIL5: $res5"
+    val res6 = generatedPlusExtensionAny(null, null)
+    if (res6 != "nullnull") return "FAIL6: $res6"
+    val res7 = generatedPlusExtensionString("foo", "bar")
+    if (res7 != "foobar") return "FAIL7: $res7"
+    val res8 = generatedPlusExtensionString(null, "bar")
+    if (res8 != "nullbar") return "FAIL8: $res8"
+    val res9 = generatedPlusExtensionFoo(null, Foo(42))
+    if (res9 != "nullFoo(bar=42)") return "FAIL9: $res9"
+    val res10 = generatedPlusExtensionMaybeFoo("foo", Foo(42))
+    if (res10 != "fooFoo(bar=42)") return "FAIL10: $res10"
+    val res11 = generatedPlusExtensionMaybeFoo("foo", null)
+    if (res11 != "foonull") return "FAIL11: $res11"
+    return "OK"
+}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt
similarity index 79%
rename from kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt
rename to compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt
index cdda5787b13..70c0213f490 100644
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 package codegen.stringConcatenationTypeNarrowing.kt53119_plus_generated_noescape
 import kotlin.test.*
@@ -24,7 +22,8 @@ fun getNextInt(): Int {
     return Random.nextInt(IntRange(42153, 42153))
 }
 
-@Test
-fun runTest() {
-    println(getNextInt())
+fun box(): String {
+    val nextInt = getNextInt()
+    if (nextInt != 42153) return "FAIL: $nextInt != 42153"
+    return "OK"
 }
diff --git a/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt
new file mode 100644
index 00000000000..2c3dcb6e236
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt
@@ -0,0 +1,111 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+package codegen.stringConcatenationTypeNarrowing.kt53119_plus_member
+import kotlin.test.*
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberAny
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun manualPlusMemberAny(str: String, maybeAny: kotlin.Any?): kotlin.String =
+    str + maybeAny
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberString
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+
+// CHECK: ret %struct.ObjHeader*
+
+fun manualPlusMemberString(str1: String, str2: String): kotlin.String =
+        str1 + str2
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#generatedPlusMemberAny
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusMemberAny(str: String, maybeAny: Any?): String {
+    return "$str$maybeAny"
+}
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#generatedPlusMemberString
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+
+// CHECK-OPT-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK: ret %struct.ObjHeader*
+
+fun generatedPlusMemberString(str1: String, str2: String): String {
+    return "$str1$str2"
+}
+
+data class Foo(val bar: Int)
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberFoo
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT Foo#toString(){}kotlin.String
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+
+// CHECK: ret %struct.ObjHeader*
+fun manualPlusMemberFoo(str1: String, foo: Foo): kotlin.String =
+        str1 + foo
+
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberMaybeFoo
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+// CHECK-OPT: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String
+// CHECK-OPT-NOT: kfun:kotlin.String#plus(kotlin.Any?)
+
+// CHECK-OPT: call %struct.ObjHeader* @Kotlin_String_plusImpl
+// CHECK-OPT-NOT: Foo#toString(){}kotlin.String"
+
+// CHECK: ret %struct.ObjHeader*
+fun manualPlusMemberMaybeFoo(str1: String, foo: Foo?): kotlin.String =
+        str1 + foo
+
+fun box(): String {
+    val foo = Foo(42)
+    val res1 = manualPlusMemberAny("foo", foo)
+    if (res1 != "fooFoo(bar=42)") return "FAIL1: $res1"
+    val res2 = manualPlusMemberAny("foo", null)
+    if (res2 != "foonull") return "FAIL2: $res2"
+    val res3 = manualPlusMemberString("foo", "bar")
+    if (res3 != "foobar") return "FAIL3: $res3"
+    val res4 = generatedPlusMemberAny("foo", null)
+    if (res4 != "foonull") return "FAIL4: $res4"
+    val res5 = generatedPlusMemberAny("foo", foo)
+    if (res5 != "fooFoo(bar=42)") return "FAIL5: $res5"
+    val res6 = generatedPlusMemberString("foo", "bar")
+    if (res6 != "foobar") return "FAIL6: $res6"
+    val res7 = manualPlusMemberFoo("foo", Foo(42))
+    if (res7 != "fooFoo(bar=42)") return "FAIL7: $res7"
+    val res8 = manualPlusMemberMaybeFoo("foo", Foo(42))
+    if (res8 != "fooFoo(bar=42)") return "FAIL8: $res8"
+    val res9 = manualPlusMemberMaybeFoo("foo", null)
+    if (res9 != "foonull") return "FAIL9: $res9"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt
new file mode 100644
index 00000000000..c40ed658003
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt
@@ -0,0 +1,27 @@
+// WITH_STDLIB
+import kotlin.collections.*
+
+val sideEffectsHolder = mutableListOf<Int>()
+fun withSideEffect(param: Int): String? {
+    sideEffectsHolder.add(param)
+    return "Result $param"
+}
+
+fun box(): String {
+    val result1 = "Result1 is: " + withSideEffect(1)
+    if (result1 != "Result1 is: Result 1") return "FAIL 1: $result1"
+    if (sideEffectsHolder != listOf(1)) return "FAIL 1 sideffects: $sideEffectsHolder"
+    sideEffectsHolder.clear()
+    val result2 = "Result2 is: " + withSideEffect(2) + "!"
+    if (result2 != "Result2 is: Result 2!") return "FAIL 2: $result2"
+    if (sideEffectsHolder != listOf(2)) return "FAIL 2 sideffects: $sideEffectsHolder"
+    sideEffectsHolder.clear()
+    val result3 = withSideEffect(31) + withSideEffect(32)
+    if (result3 != "Result 31Result 32") return "FAIL 3: $result3"
+    if (sideEffectsHolder != listOf(31,32)) return "FAIL 3 sideffects: $sideEffectsHolder"
+    sideEffectsHolder.clear()
+    val result4 = withSideEffect(41) + withSideEffect(42) + withSideEffect(43)
+    if (result4 != "Result 41Result 42Result 43") return "FAIL 4: $result4"
+    if (sideEffectsHolder != listOf(41,42,43)) return "FAIL 4 sideffects: $sideEffectsHolder"
+    return "OK"
+}
diff --git a/kotlin-native/backend.native/tests/filecheck/suspend_returnNothing.kt b/compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt
similarity index 78%
rename from kotlin-native/backend.native/tests/filecheck/suspend_returnNothing.kt
rename to compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt
index fc98f4c65ed..b385a94cd75 100644
--- a/kotlin-native/backend.native/tests/filecheck/suspend_returnNothing.kt
+++ b/compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 import kotlin.test.*
 
@@ -33,10 +31,11 @@ fun builder(c: suspend () -> Unit) {
     c.startCoroutine(EmptyContinuation)
 }
 
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     builder {
         bar()
     }
-    println("OK")
+    return "OK"
 }
 
diff --git a/kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_functions.kt b/compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt
similarity index 98%
rename from kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_functions.kt
rename to compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt
index 0b29c52d41d..af8be3644a1 100644
--- a/kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_functions.kt
+++ b/compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 import kotlin.coroutines.*
 import kotlin.coroutines.intrinsics.*
@@ -290,7 +288,8 @@ fun builder(c: suspend () -> Unit) {
     c.startCoroutine(EmptyContinuation)
 }
 
-fun main() {
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
     builder {
         s1()
         s2()
@@ -317,4 +316,5 @@ fun main() {
         s23(true)
         s24()
     }
+    return "OK"
 }
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_lambdas.kt b/compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt
similarity index 98%
rename from kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_lambdas.kt
rename to compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt
index 512d89614f7..c671016f94e 100644
--- a/kotlin-native/backend.native/tests/filecheck/suspend_tailcalls_lambdas.kt
+++ b/compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt
@@ -1,7 +1,5 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
 
 import kotlin.coroutines.*
 import kotlin.coroutines.intrinsics.*
@@ -43,6 +41,34 @@ fun builderInt(c: suspend () -> Int) {
     c.startCoroutine(EmptyContinuation)
 }
 
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String {
+    s1()
+    s2()
+    s3()
+    s4()
+    s5()
+    s6()
+    s7()
+    s8()
+    s9()
+    s10()
+    s11()
+    s12()
+    s13()
+    s14()
+    s15()
+    s16()
+    s17()
+    s18(true)
+    s19(true)
+    s20(true)
+    s21()
+    s22()
+    s23(true)
+    s24()
+    return "OK"
+}
 
 fun s1() {
     // CHECK-LABEL: define internal %struct.ObjHeader* @"kfun:s1$lambda${{[0-9]*}}
@@ -354,30 +380,3 @@ fun s24() {
     }
     // CHECK-LABEL: epilogue:
 }
-
-fun main() {
-    s1()
-    s2()
-    s3()
-    s4()
-    s5()
-    s6()
-    s7()
-    s8()
-    s9()
-    s10()
-    s11()
-    s12()
-    s13()
-    s14()
-    s15()
-    s16()
-    s17()
-    s18(true)
-    s19(true)
-    s20(true)
-    s21()
-    s22()
-    s23(true)
-    s24()
-}
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/fileCheck/when.kt b/compiler/testData/codegen/box/fileCheck/when.kt
new file mode 100644
index 00000000000..58e1ee135c5
--- /dev/null
+++ b/compiler/testData/codegen/box/fileCheck/when.kt
@@ -0,0 +1,19 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: CStubs
+
+var i = 1
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#box(){}kotlin.String"
+fun box(): String = when(i) {
+    0 -> "FAIL: 0"
+    1 -> "OK"
+    2 -> "FAIL: 2"
+    else -> "FAIL: else"
+}
+// CHECK: when_case
+// CHECK: when_next
+// CHECK: when_case1
+// CHECK: when_next2
+// CHECK: when_case3
+// CHECK: when_next4
+// CHECK: when_exit
+// CHECK: ret void
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
index 63d72c27799..b8c135844a0 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
@@ -17888,6 +17888,42 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
index 8dcbfea7a56..66c5d677b50 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
@@ -18704,6 +18704,42 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
index a4cea90c214..fd9492f134f 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
@@ -18704,6 +18704,42 @@ public class IrBlackBoxCodegenWithIrInlinerTestGenerated extends AbstractIrBlack
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 3a9f029be45..6096349cf8c 100644
--- a/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -15546,6 +15546,50 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
         }
     }
 
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class FileCheck extends AbstractLightAnalysisModeTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM_IR, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+        }
+
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class Kt53261 extends AbstractLightAnalysisModeTest {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM_IR, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+        }
+
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class StringConcatenationTypeNarrowing extends AbstractLightAnalysisModeTest {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM_IR, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsCodegenBoxTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsCodegenBoxTestGenerated.java
index af2c13e7137..4a9ef08d7b3 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsCodegenBoxTestGenerated.java
@@ -13904,6 +13904,42 @@ public class FirJsCodegenBoxTestGenerated extends AbstractFirJsCodegenBoxTest {
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6CodegenBoxTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6CodegenBoxTestGenerated.java
index 4704ce48b55..5002c668473 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6CodegenBoxTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6CodegenBoxTestGenerated.java
@@ -13904,6 +13904,42 @@ public class FirJsES6CodegenBoxTestGenerated extends AbstractFirJsES6CodegenBoxT
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsCodegenBoxTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsCodegenBoxTestGenerated.java
index 12118149014..81af4c0edca 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsCodegenBoxTestGenerated.java
@@ -13904,6 +13904,42 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsES6CodegenBoxTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsES6CodegenBoxTestGenerated.java
index 9c3c5edb16d..6a330bcb662 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsES6CodegenBoxTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsES6CodegenBoxTestGenerated.java
@@ -13904,6 +13904,42 @@ public class IrJsES6CodegenBoxTestGenerated extends AbstractIrJsES6CodegenBoxTes
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/kotlin-native/backend.native/tests/build.gradle b/kotlin-native/backend.native/tests/build.gradle
index 078199704d8..8487e9b8817 100644
--- a/kotlin-native/backend.native/tests/build.gradle
+++ b/kotlin-native/backend.native/tests/build.gradle
@@ -5916,24 +5916,7 @@ Task fileCheckTest(String name, Closure<FileCheckTest> configureClosure) {
     }
 }
 
-fileCheckTest("filecheck_smoke0") {
-    annotatedSource = project.file('filecheck/smoke0.kt')
-}
-
-fileCheckTest("filecheck_when") {
-    annotatedSource = project.file('filecheck/when.kt')
-}
-
 if (HostManager.@Companion.hostIsMac) {
-    fileCheckTest("filecheck_force_arm_instruction_set") {
-        enabled = enabled && cacheTesting == null
-        annotatedSource = project.file('filecheck/force_arm_instruction_set.kt')
-        targetName = "watchos_arm32"
-        // Perform check after optimization pipeline because
-        // LLVM might infer attributes.
-        phaseToCheck = "LTOBitcodeOptimization"
-    }
-
     fileCheckTest("filecheck_redundant_safepoints_removal_smallbinary") {
         enabled = project.globalTestArgs.contains("-opt")
         annotatedSource = project.file('filecheck/redundant_safepoints.kt')
@@ -5953,242 +5936,6 @@ fileCheckTest("filecheck_redundant_safepoints_removal") {
     phaseToCheck = "RemoveRedundantSafepoints"
 }
 
-fileCheckTest("filecheck_replace_invoke_with_call") {
-    annotatedSource = project.file('filecheck/replace_invoke_with_call.kt')
-}
-
-fileCheckTest("filecheck_no_frame_on_constant_object_access") {
-    annotatedSource = project.file('filecheck/no_frame_on_constant_object_access.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_simple_function_reference") {
-    annotatedSource = project.file('filecheck/kt49847_simple_function_reference.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_sam_Any") {
-    annotatedSource = project.file('filecheck/kt49847_sam_Any.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_sam_Int") {
-    annotatedSource = project.file('filecheck/kt49847_sam_Int.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_sam_Any_generic") {
-    annotatedSource = project.file('filecheck/kt49847_sam_Any_generic.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_sam_Int_generic") {
-    annotatedSource = project.file('filecheck/kt49847_sam_Int_generic.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_class") {
-    annotatedSource = project.file('filecheck/kt49847_class.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_generic") {
-    annotatedSource = project.file('filecheck/kt49847_generic.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt49847_generic_receiver") {
-    annotatedSource = project.file('filecheck/kt49847_generic_receiver.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt58654") {
-    annotatedSource = project.file('filecheck/kt58654.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_inline_unbox") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_inline_unbox.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    if (isAppleTarget(project)) {
-        checkPrefix = "CHECK-APPLE"
-    }
-}
-
-fileCheckTest("filecheck_kt53261_noinline_value_unbox") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_value_unbox.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_CPointer.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_CPointer.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_NativePointed.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_NativePointed.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_NonNullNativePtr.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_NonNullNativePtr.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_StableRef") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_StableRef.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_UByteArray.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_UByteArray.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_UIntArray.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_UIntArray.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_ULongArray.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_ULongArray.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_kt53261_noinline_UShortArray.kt") {
-    annotatedSource = project.file('filecheck/kt53261/kt53261_noinline_UShortArray.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-}
-
-fileCheckTest("filecheck_intrinsics") {
-    annotatedSource = project.file('filecheck/intrinsics.kt')
-}
-
-fileCheckTest("filecheck_default_parameters_dont_box") {
-    annotatedSource = project.file('filecheck/default_parameters_dont_box.kt')
-}
-
-tasks.register("kt53119_side_effect", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.kt"
-}
-
-fileCheckTest("filecheck_kt53119_plus_generated_noescape") {
-    annotatedSource = project.file('codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    extraOpts = ["-tr"]
-}
-
-tasks.register("kt53119_plus_generated_noescape", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt"
-}
-
-fileCheckTest("filecheck_kt53119_plus_member") {
-    annotatedSource = project.file('codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    extraOpts = ["-tr"]
-}
-
-tasks.register("kt53119_plus_member", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.kt"
-}
-
-fileCheckTest("filecheck_kt53119_plus_extension") {
-    annotatedSource = project.file('codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    extraOpts = ["-tr"]
-}
-
-tasks.register("kt53119_plus_extension", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt"
-}
-
-fileCheckTest("filecheck_kt53119_append_generated") {
-    annotatedSource = project.file('codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    extraOpts = ["-tr"]
-}
-
-tasks.register("kt53119_append_generated", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.kt"
-}
-
-fileCheckTest("filecheck_kt53119_append_manual") {
-    annotatedSource = project.file('codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    extraOpts = ["-tr"]
-}
-
-tasks.register("kt53119_append_manual", KonanLocalTest) {
-    useGoldenData = true
-    source = "codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.kt"
-}
-
-fileCheckTest("filecheck_escape_analysis_enabled") {
-    annotatedSource = project.file('filecheck/escape_analysis.kt')
-    enabled = project.globalTestArgs.contains('-opt')
-    checkPrefix = "CHECK-OPT"
-}
-
-fileCheckTest("filecheck_enum_when") {
-    // In case of `-opt` we inline Enum.ordinal due to property inlining.
-    if (project.globalTestArgs.contains('-opt')) {
-        checkPrefix = "CHECK-OPT"
-    }
-    annotatedSource = project.file('filecheck/enum_when.kt')
-}
-
-fileCheckTest("filecheck_escape_analysis_disabled") {
-    annotatedSource = project.file('filecheck/escape_analysis.kt')
-    enabled = project.globalTestArgs.contains('-g')
-    checkPrefix = "CHECK-DEBUG"
-}
-
-fileCheckTest("filecheck_suspend_returnNothing") {
-    annotatedSource = project.file('filecheck/suspend_returnNothing.kt')
-}
-
-fileCheckTest("filecheck_suspend_tailcalls_functions") {
-    annotatedSource = project.file('filecheck/suspend_tailcalls_functions.kt')
-}
-
-fileCheckTest("filecheck_suspend_tailcalls_lambdas") {
-    annotatedSource = project.file('filecheck/suspend_tailcalls_lambdas.kt')
-}
-
-fileCheckTest("filecheck_bce") {
-    enabled = enabled && cacheTesting == null
-    annotatedSource = project.file('filecheck/bce.kt')
-}
-
-fileCheckTest("filecheck_generic_function_references") {
-    enabled = project.globalTestArgs.contains('-opt')
-    annotatedSource = project.file('filecheck/generic_function_references.kt')
-}
-
-fileCheckTest("filecheck_adopted_function_reference") {
-    annotatedSource = project.file('filecheck/adopted_function_reference.kt')
-}
-
-fileCheckTest("filecheck_single_tls_load") {
-    enabled = project.globalTestArgs.contains("-opt")
-    annotatedSource = project.file('filecheck/single_tls_load.kt')
-    phaseToCheck = "OptimizeTLSDataLoads"
-}
-
-fileCheckTest("filecheck_signext_zeroext0") {
-    annotatedSource = project.file('filecheck/signext_zeroext0.kt')
-    if (project.testTarget == 'mingw_x64') {
-        checkPrefix = "CHECK-WINDOWSX64"
-    } else if (!target.family.appleFamily && target.architecture == Architecture.ARM64) {
-        checkPrefix = "CHECK-AAPCS"
-    }
-}
-
 createInterop("filecheck_signext_zeroext_interop_input") {
     it.defFile 'filecheck/signext_zeroext_interop_input.def'
 }
@@ -6210,17 +5957,6 @@ fileCheckTest("filecheck_signext_zeroext_objc_export") {
     enabled = target.family.appleFamily
 }
 
-fileCheckTest("filecheck_function_attributes_at_callsite") {
-    // attributes for caller and callee might be the same so we allow overlapping.
-    additionalFileCheckFlags = ["--allow-deprecated-dag-overlap"]
-    annotatedSource = project.file('filecheck/function_attributes_at_callsite.kt')
-}
-
-fileCheckTest("filecheck_constants_merge") {
-    annotatedSource = project.file('filecheck/constants_merge.kt')
-}
-
-
 fileCheckTest("filecheck_objc_direct") {
     enabled = enabled && cacheTesting == null
     annotatedSource = project.file('filecheck/objc_direct.kt')
@@ -6228,10 +5964,6 @@ fileCheckTest("filecheck_objc_direct") {
     enabled = target.family.appleFamily
 }
 
-fileCheckTest("filecheck_atomics") {
-    annotatedSource = project.file('filecheck/atomics.kt')
-}
-
 
 dependencies {
     nopPluginApi kotlinCompilerModule
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.kt b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.kt
deleted file mode 100644
index cf632b36966..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.kt
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package codegen.stringConcatenationTypeNarrowing.kt53119_append_generated
-import kotlin.test.*
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeAny
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK: ret %struct.ObjHeader*
-
-fun maybeAnyMaybeAny(maybeAny1: Any?, maybeAny2: Any?): String {
-    return "$maybeAny1,$maybeAny2"
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeString
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun maybeAnyMaybeString(maybeAny1: Any?, maybeString2: String?): String {
-    return "$maybeAny1,$maybeString2"
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyString
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun maybeAnyString(maybeAny1: Any?, string: String): String {
-    return "$maybeAny1,$string"
-}
-
-data class Foo(val bar: Int)
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyFoo
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun maybeAnyFoo(maybeAny: Any?, foo: Foo): String {
-    return "$maybeAny,$foo"
-}
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated#maybeAnyMaybeFoo
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_generated.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun maybeAnyMaybeFoo(maybeAny: Any?, foo: Foo?): String {
-    return "$maybeAny,$foo"
-}
-@Test
-fun runTest() {
-    val foo = Foo(42)
-    println(maybeAnyMaybeAny(foo, foo))
-    println(maybeAnyMaybeAny(null, null))
-    println(maybeAnyMaybeString(foo, "bar"))
-    println(maybeAnyMaybeString(null, null))
-    println(maybeAnyString(foo, "bar"))
-    println(maybeAnyString(null, "bar"))
-    println(maybeAnyFoo(foo, foo))
-    println(maybeAnyFoo(null, foo))
-    println(maybeAnyMaybeFoo(foo, foo))
-    println(maybeAnyMaybeFoo(foo, null))
-}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.out
deleted file mode 100644
index dee9b413891..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_generated.out
+++ /dev/null
@@ -1,10 +0,0 @@
-Foo(bar=42),Foo(bar=42)
-null,null
-Foo(bar=42),bar
-null,null
-Foo(bar=42),bar
-null,bar
-Foo(bar=42),Foo(bar=42)
-null,Foo(bar=42)
-Foo(bar=42),Foo(bar=42)
-Foo(bar=42),null
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.kt b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.kt
deleted file mode 100644
index f2e88e11008..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.kt
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package codegen.stringConcatenationTypeNarrowing.kt53119_append_manual
-import kotlin.test.*
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendMaybeAny(kotlin.Any?)
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK: ret %struct.ObjHeader*
-
-fun appendMaybeAny(maybeAny: Any?): String {
-    val sb = kotlin.text.StringBuilder()
-    sb.append(maybeAny)
-    return sb.toString()
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendAny(kotlin.Any)
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun appendAny(any: Any): String {
-    val sb = kotlin.text.StringBuilder()
-    sb.append(any)
-    return sb.toString()
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendMaybeString(kotlin.String?)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String
-
-// CHECK: ret %struct.ObjHeader*
-
-fun appendMaybeString(maybeStr: String?): String {
-    val sb = kotlin.text.StringBuilder()
-    sb.append(maybeStr)
-    return sb.toString()
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendString(kotlin.String)
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String
-
-// CHECK: ret %struct.ObjHeader*
-
-fun appendString(str: String): String {
-    val sb = kotlin.text.StringBuilder()
-    sb.append(str)
-    return sb.toString()
-}
-
-data class Foo(val bar: Int)
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual#appendFoo(codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo)
-// CHECK: %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_append_manual.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append(kotlin.String?)
-
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK-NOT: %struct.ObjHeader* @"kfun:kotlin.text.StringBuilder#append
-// CHECK: ret %struct.ObjHeader*
-
-fun appendFoo(foo: Foo): String {
-    val sb = kotlin.text.StringBuilder()
-    sb.append(foo)
-    return sb.toString()
-}
-
-@Test
-fun runTest() {
-    val foo = Foo(42)
-    println(appendMaybeAny(foo))
-    println(appendMaybeAny(null))
-    println(appendAny(foo))
-    println(appendMaybeString("foo"))
-    println(appendMaybeString(null))
-    println(appendString("foo"))
-    println(appendFoo(foo))
-}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.out
deleted file mode 100644
index 1d7e5b40704..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_append_manual.out
+++ /dev/null
@@ -1,7 +0,0 @@
-Foo(bar=42)
-null
-Foo(bar=42)
-foo
-null
-foo
-Foo(bar=42)
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt
deleted file mode 100644
index 5fefa6dce57..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension
-import kotlin.test.*
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#manualPlusExtensionAny
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-
-// CHECK: ret %struct.ObjHeader*
-
-fun manualPlusExtensionAny(maybeStr: String?, maybeAny: kotlin.Any?): kotlin.String =
-        maybeStr + maybeAny
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#manualPlusExtensionString
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun manualPlusExtensionString(maybeStr: String?, str: String): kotlin.String =
-        maybeStr + str
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionAny
-// CHECK-NOT: kfun:kotlin#plus__at__kotlin.String?(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin#plus__at__kotlin.String?(kotlin.Any?)
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusExtensionAny(maybeStr: String?, maybeAny: Any?): String {
-    return "$maybeStr$maybeAny"
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionString
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusExtensionString(maybeStr: String?, str: String): String {
-    return "$maybeStr$str"
-}
-
-data class Foo(val bar: Int)
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionFoo
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusExtensionFoo(maybeStr: String?, foo: Foo): String {
-    return "$maybeStr$foo"
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension#generatedPlusExtensionMaybeFoo
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_extension.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusExtensionMaybeFoo(maybeStr: String?, foo: Foo?): String {
-    return "$maybeStr$foo"
-}
-
-@Test
-fun runTest() {
-    val foo = Foo(42)
-    println(manualPlusExtensionAny("foo", foo))
-    println(manualPlusExtensionAny(null, null))
-    println(manualPlusExtensionString("foo", "bar"))
-    println(manualPlusExtensionString(null, "bar"))
-    println(generatedPlusExtensionAny("foo", foo))
-    println(generatedPlusExtensionAny(null, null))
-    println(generatedPlusExtensionString("foo", "bar"))
-    println(generatedPlusExtensionString(null, "bar"))
-    println(generatedPlusExtensionFoo(null, Foo(42)))
-    println(generatedPlusExtensionMaybeFoo("foo", Foo(42)))
-    println(generatedPlusExtensionMaybeFoo("foo", null))
-}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.out
deleted file mode 100644
index 160fb91a0e9..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_extension.out
+++ /dev/null
@@ -1,11 +0,0 @@
-fooFoo(bar=42)
-nullnull
-foobar
-nullbar
-fooFoo(bar=42)
-nullnull
-foobar
-nullbar
-nullFoo(bar=42)
-fooFoo(bar=42)
-foonull
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.out
deleted file mode 100644
index 2bbddb07247..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.out
+++ /dev/null
@@ -1 +0,0 @@
-42153
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.kt b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.kt
deleted file mode 100644
index 39800ac153b..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.kt
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package codegen.stringConcatenationTypeNarrowing.kt53119_plus_member
-import kotlin.test.*
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberAny
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun manualPlusMemberAny(str: String, maybeAny: kotlin.Any?): kotlin.String =
-    str + maybeAny
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberString
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-
-// CHECK: ret %struct.ObjHeader*
-
-fun manualPlusMemberString(str1: String, str2: String): kotlin.String =
-        str1 + str2
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#generatedPlusMemberAny
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusMemberAny(str: String, maybeAny: Any?): String {
-    return "$str$maybeAny"
-}
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#generatedPlusMemberString
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: call %struct.ObjHeader* @Kotlin_String_plusImpl
-
-// CHECK-NOT: call %struct.ObjHeader* @"kfun:kotlin.String#toString(){}kotlin.String"
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-
-// CHECK: ret %struct.ObjHeader*
-
-fun generatedPlusMemberString(str1: String, str2: String): String {
-    return "$str1$str2"
-}
-
-data class Foo(val bar: Int)
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberFoo
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-// CHECK call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
-// CHECK-NOT Foo#toString(){}kotlin.String
-
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-
-// CHECK: ret %struct.ObjHeader*
-fun manualPlusMemberFoo(str1: String, foo: Foo): kotlin.String =
-        str1 + foo
-
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member#manualPlusMemberMaybeFoo
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-// CHECK call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString(){}kotlin.String"
-// CHECK-NOT Foo#toString(){}kotlin.String
-
-// CHECK: call %struct.ObjHeader* @"kfun:codegen.stringConcatenationTypeNarrowing.kt53119_plus_member.Foo#toString
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-// CHECK-NOT: kfun:kotlin.String#plus(kotlin.Any?)
-// CHECK: call %struct.ObjHeader* @Kotlin_String_plusImpl
-// CHECK-NOT: Foo#toString(){}kotlin.String"
-
-// CHECK: ret %struct.ObjHeader*
-fun manualPlusMemberMaybeFoo(str1: String, foo: Foo?): kotlin.String =
-        str1 + foo
-
-@Test
-fun runTest() {
-    val foo = Foo(42)
-    println(manualPlusMemberAny("foo", foo))
-    println(manualPlusMemberAny("foo", null))
-    println(manualPlusMemberString("foo", "bar"))
-    println(generatedPlusMemberAny("foo", null))
-    println(generatedPlusMemberAny("foo", foo))
-    println(generatedPlusMemberString("foo", "bar"))
-    println(manualPlusMemberFoo("foo", Foo(42)))
-    println(manualPlusMemberMaybeFoo("foo", Foo(42)))
-    println(manualPlusMemberMaybeFoo("foo", null))
-}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.out
deleted file mode 100644
index 3c25d8a8c10..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_plus_member.out
+++ /dev/null
@@ -1,9 +0,0 @@
-fooFoo(bar=42)
-foonull
-foobar
-foonull
-fooFoo(bar=42)
-foobar
-fooFoo(bar=42)
-fooFoo(bar=42)
-foonull
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.kt b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.kt
deleted file mode 100644
index c45f8b2d51b..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.kt
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// The same tests are also tested with FileCheck in folder ../../filecheck/kt53119_*.kt
-// Please keep them in sync
-
-package codegen.stringConcatenationTypeNarrowing.kt53119_side_effect
-import kotlin.test.*
-
-fun withSideEffect(): String? {
-    println("Side effect")
-    return "Result."
-}
-
-@Test
-fun runTest() {
-    println("Retval is: " + withSideEffect())
-    println("Retval is: " + withSideEffect() + "!")
-    println(withSideEffect() + withSideEffect())
-    println(withSideEffect() + withSideEffect() + withSideEffect())
-}
diff --git a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.out b/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.out
deleted file mode 100644
index b497d6d6bab..00000000000
--- a/kotlin-native/backend.native/tests/codegen/stringConcatenationTypeNarrowing/kt53119_side_effect.out
+++ /dev/null
@@ -1,11 +0,0 @@
-Side effect
-Retval is: Result.
-Side effect
-Retval is: Result.!
-Side effect
-Side effect
-Result.Result.
-Side effect
-Side effect
-Side effect
-Result.Result.Result.
diff --git a/kotlin-native/backend.native/tests/filecheck/adopted_function_reference.kt b/kotlin-native/backend.native/tests/filecheck/adopted_function_reference.kt
deleted file mode 100644
index 1334f9070b8..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/adopted_function_reference.kt
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-inline fun foo(x: () -> Unit): String {
-    x()
-    return "OK"
-}
-
-fun String.id(s: String = this, vararg xs: Int): String = s
-
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
-    // CHECK-LABEL: entry
-    // CHECK-NOT: call %struct.ObjHeader* @AllocInstance
-    // CHECK-NOT: alloca
-    val x = foo("Fail"::id)
-    println(x)
-    // CHECK-LABEL: epilogue
-}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/escape_analysis.kt b/kotlin-native/backend.native/tests/filecheck/escape_analysis.kt
deleted file mode 100644
index cb4ffb92871..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/escape_analysis.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-class A(val x: Int)
-
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
-    // CHECK-DEBUG: call %struct.ObjHeader* @AllocInstance
-    // CHECK-OPT: alloca %"kclassbody:A#internal"
-    val a = A(5)
-    println(a.x)
-// CHECK-LABEL: epilogue
-}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_class.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_class.kt
deleted file mode 100644
index c54ff9878db..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_class.kt
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-class C {
-    fun foo(x: Int) = x
-}
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val c = C()
-    val fooref = c::foo
-    if( fooref(42) == 42)
-        println("ok")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_generic.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_generic.kt
deleted file mode 100644
index 5a7e8930487..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_generic.kt
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-class C<T> {
-    fun foo(x: T) = x
-}
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val c = C<Int>()
-    val fooref = c::foo
-    if( fooref(42) == 42)
-        println("ok")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any.kt
deleted file mode 100644
index 9e712f2f203..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-fun interface Foo {
-    fun bar(x: Int): Any
-}
-
-fun baz(x: Any): Int = x.hashCode()
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// Boxing needs to be used now due to non-devirtualized call
-// CHECK: Int-box
-
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-
-fun main() {
-    val foo: Foo = Foo(::baz)
-    if( foo.bar(42) == 42 )
-        println("passed")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any_generic.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any_generic.kt
deleted file mode 100644
index f249072c1e3..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Any_generic.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-fun interface Foo<T> {
-    fun bar(x: T): Any
-}
-
-fun baz(x: Any): Int = x.hashCode()
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val foo: Foo<Int> = Foo(::baz)
-    if( foo.bar(42) == 42 )
-        println("passed")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int.kt
deleted file mode 100644
index 0803c1aa511..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-fun interface Foo {
-    fun bar(x: Int): Int
-}
-
-fun baz(x: Int): Int = x.hashCode()
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val foo: Foo = Foo(::baz)
-    if( foo.bar(42) == 42 )
-        println("passed")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int_generic.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int_generic.kt
deleted file mode 100644
index fa47a4c4e88..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_sam_Int_generic.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-fun interface Foo<T> {
-    fun bar(x: T): Int
-}
-
-fun baz(x: Any): Int = x.hashCode()
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val foo: Foo<Int> = Foo(::baz)
-    if( foo.bar(42) == 42 )
-        println("passed")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt49847_simple_function_reference.kt b/kotlin-native/backend.native/tests/filecheck/kt49847_simple_function_reference.kt
deleted file mode 100644
index 3bb5bf3f816..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt49847_simple_function_reference.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-fun plus1(x: Int) = x + 1
-
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK-NOT: Int-box
-// CHECK-NOT: Int-unbox
-// CHECK: ret void
-fun main() {
-    val ref = ::plus1
-    var y = 0
-    repeat(100000) {
-        y += ref(it)  // Should be devirtualized and invoked without boxing/unboxing (`Int-box`/`Int-unbox`)
-    }
-    if (y > 999999)
-        println("y > 999999")
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_inline_unbox.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_inline_unbox.kt
deleted file mode 100644
index 73bb35b4c12..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_inline_unbox.kt
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-import kotlin.native.concurrent.*
-import kotlinx.cinterop.*
-
-fun main(arr: Array<String>) {
-    println(arr.size.toByte() == arr[0].toByte())
-    println(arr.size.toUByte() == arr[0].toUByte())
-    println(arr.size.toShort() == arr[0].toShort())
-    println(arr.size.toUShort() == arr[0].toUShort())
-    println(arr.size.toInt() == arr[0].toInt())
-    println(arr.size.toUInt() == arr[0].toUInt())
-    println(arr.size.toLong() == arr[0].toLong())
-    println(arr.size.toULong() == arr[0].toULong())
-    println(arr.size.toFloat() == arr[0].toFloat())
-    println(arr.size.toDouble() == arr[0].toDouble())
-    println(Char(arr.size) == arr[0][0])
-    println((arr.size == 1) == (arr[0] == "1")) // Boolean
-
-    memScoped {
-        val var1: IntVar = alloc()
-        val var2: IntVar = alloc()
-        println(var1.ptr.rawValue == var2.ptr.rawValue)
-    }
-
-    println(Result.success(arr.size) == Result.success(arr[0].toInt()))
-    println(vectorOf(arr.size, arr.size, arr.size, arr.size) == vectorOf(arr[0].toInt(), arr[0].toInt(), arr[0].toInt(), arr[0].toInt()))
-
-    val w1 = Worker.start()
-    val w2 = Worker.start()
-    println(w1 == w2)
-
-    val f1 = w1.requestTermination()
-    val f2 = w2.requestTermination()
-    println(f1 == f2)
-
-    f1.result
-    f2.result
-}
-// CHECK-NOT: {{call|invoke}} i64 @"kfun:kotlin#<Long-unbox>
-// CHECK-NOT: {{call|invoke}} i64 @"kfun:kotlin#<ULong-unbox>
-
-// CHECK-NOT: {{call|invoke}} i32 @"kfun:kotlin#<Int-unbox>
-// CHECK-NOT: {{call|invoke}} i32 @"kfun:kotlin#<UInt-unbox>
-
-// CHECK-NOT: {{call|invoke}} signext i16 @"kfun:kotlin#<Short-unbox>
-// CHECK-NOT: {{call|invoke}} zeroext i16 @"kfun:kotlin#<UShort-unbox>
-
-// CHECK-NOT: {{call|invoke}} signext i8 @"kfun:kotlin#<Byte-unbox>
-// CHECK-NOT: {{call|invoke}} zeroext i8 @"kfun:kotlin#<UByte-unbox>
-
-// CHECK-NOT: {{call|invoke}} zeroext i16 @"kfun:kotlin#<Char-unbox>
-// CHECK-NOT: {{call|invoke}} zeroext i1 @"kfun:kotlin#<Boolean-unbox>
-
-// CHECK-NOT: {{call|invoke}} double @"kfun:kotlin#<Double-unbox>
-// CHECK-NOT: {{call|invoke}} float @"kfun:kotlin#<Float-unbox>
-
-// CHECK-NOT: {{call|invoke}} i8* @"kfun:kotlin.native.internal#<NativePtr-unbox>
-// CHECK-NOT: {{call|invoke}} i32 @"kfun:kotlin.native.concurrent#<Future-unbox>
-// CHECK-NOT: {{call|invoke}} i32 @"kfun:kotlin.native.concurrent#<Worker-unbox>
-// CHECK-NOT: {{call|invoke}} <4 x float> @"kfun:kotlin.native#<Vector128-unbox>
-// CHECK-NOT: {{call|invoke}} %struct.ObjHeader* @"kfun:kotlin#<Result-unbox>
-
-// On APPLE targets, generated functions <T>ToNSNumber may contain non-converted invocations of unbox functions.
-// CHECK-APPLE: {{IntToNSNumber|LongToNSNumber|ByteToNSNumber|ShortToNSNumber|FloatToNSNumber|DoubleToNSNumber}}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_CPointer.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_CPointer.kt
deleted file mode 100644
index dbe6f8aa708..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_CPointer.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-import kotlinx.cinterop.*
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlinx.cinterop.CPointer#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
-// CHECK: call i8* @"kfun:kotlinx.cinterop#<CPointer-unbox>(kotlin.Any?){}kotlinx.cinterop.CPointer<-1:0>?"
-
-fun main() = memScoped {
-    val var1: IntVar = alloc()
-    val var2: IntVar = alloc()
-    println(var1.ptr == var2.ptr)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NativePointed.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NativePointed.kt
deleted file mode 100644
index b0e3f51aad3..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NativePointed.kt
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-import kotlinx.cinterop.*
-
-// CHECK-LABEL: define i8* @"kfun:kotlinx.cinterop#interpretOpaquePointed(kotlin.native.internal.NativePtr){}kotlinx.cinterop.NativePointed"(i8* %0)
-// CHECK: call i8* @"kfun:kotlinx.cinterop#<NativePointed-unbox>(kotlin.Any?){}kotlinx.cinterop.NativePointed?"
-
-fun main() = memScoped {
-    val var1: NativePointed = alloc(4, 4)
-    println(interpretOpaquePointed(var1.rawPtr))
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NonNullNativePtr.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NonNullNativePtr.kt
deleted file mode 100644
index 2b31026c130..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_NonNullNativePtr.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-import kotlinx.cinterop.*
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlin.native.internal.NonNullNativePtr#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
-// CHECK: call i8* @"kfun:kotlin.native.internal#<NonNullNativePtr-unbox>(kotlin.Any?){}kotlin.native.internal.NonNullNativePtr?"
-
-fun main() = memScoped {
-    val var1: IntVar = alloc()
-    val var2: IntVar = alloc()
-    // The first one is K1, the second one is K2.
-    @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
-    println(var1.ptr.value as Any == var2.ptr.value as Any)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_StableRef.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_StableRef.kt
deleted file mode 100644
index 3a8a458cdc8..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_StableRef.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-import kotlinx.cinterop.*
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlinx.cinterop.StableRef#equals(kotlin.Any?){}kotlin.Boolean"(i8* %0, %struct.ObjHeader* %1)
-// CHECK: call i8* @"kfun:kotlinx.cinterop#<StableRef-unbox>(kotlin.Any?){}kotlinx.cinterop.StableRef<-1:0>?"
-
-fun main() {
-    val ref1 = StableRef.create(Any())
-    val ref2 = StableRef.create(Any())
-    println(ref1 == ref2)
-    ref2.dispose()
-    ref1.dispose()
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UByteArray.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UByteArray.kt
deleted file mode 100644
index 8f7c9407409..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UByteArray.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlin.UByteArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
-// CHECK: call %struct.ObjHeader* @"kfun:kotlin#<UByteArray-unbox>(kotlin.Any?){}kotlin.UByteArray?"
-
-fun main() {
-    val arr1 = UByteArray(10) { it.toUByte() }
-    val arr2 = UByteArray(10) { (it / 2).toUByte() }
-    println(arr1 == arr2)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UIntArray.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UIntArray.kt
deleted file mode 100644
index 5ca01a4f5b3..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UIntArray.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlin.UIntArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
-// CHECK: call %struct.ObjHeader* @"kfun:kotlin#<UIntArray-unbox>(kotlin.Any?){}kotlin.UIntArray?"
-
-fun main() {
-    val arr1 = UIntArray(10) { it.toUInt() }
-    val arr2 = UIntArray(10) { (it / 2).toUInt() }
-    println(arr1 == arr2)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_ULongArray.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_ULongArray.kt
deleted file mode 100644
index 64fa93b2817..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_ULongArray.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlin.ULongArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
-// CHECK: call %struct.ObjHeader* @"kfun:kotlin#<ULongArray-unbox>(kotlin.Any?){}kotlin.ULongArray?"
-
-fun main() {
-    val arr1 = ULongArray(10) { it.toULong() }
-    val arr2 = ULongArray(10) { (it / 2).toULong() }
-    println(arr1 == arr2)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UShortArray.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UShortArray.kt
deleted file mode 100644
index aca0c2a743c..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_UShortArray.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:kotlin.UShortArray#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
-// CHECK: call %struct.ObjHeader* @"kfun:kotlin#<UShortArray-unbox>(kotlin.Any?){}kotlin.UShortArray?"
-
-fun main() {
-    val arr1 = UShortArray(10) { it.toUShort() }
-    val arr2 = UShortArray(10) { (it / 2).toUShort() }
-    println(arr1 == arr2)
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_value_unbox.kt b/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_value_unbox.kt
deleted file mode 100644
index ffd05dffd44..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/kt53261/kt53261_noinline_value_unbox.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: define {{zeroext i1|i1}} @"kfun:C#equals(kotlin.Any?){}kotlin.Boolean"(%struct.ObjHeader* %0, %struct.ObjHeader* %1)
-// CHECK: call %struct.ObjHeader* @"kfun:#<C-unbox>(kotlin.Any?){}C?"
-value class C(val x: Any)
-// Note: <C-unbox> is also called from bridges for equals, hashCode and toString.
-
-fun main() {
-    println(C(42) == C(13))
-}
diff --git a/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt b/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt
deleted file mode 100644
index 4948aa96d85..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
-// CHECK-LABEL-AAPCS: i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 %0)
-// CHECK-LABEL-WINDOWSX64: zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
-fun id(arg: Boolean): Boolean {
-    return arg
-}
-
-// CHECK-LABEL: signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext %0)
-// CHECK-LABEL-AAPCS: i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
-// CHECK-LABEL-WINDOWSX64: i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
-fun id(arg: Byte): Byte {
-    return arg
-}
-
-// CHECK-LABEL: zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext %0)
-// CHECK-LABEL-AAPCS: i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
-// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
-fun id(arg: Char): Char {
-    return arg
-}
-
-// CHECK-LABEL: signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext %0)
-// CHECK-LABEL-AAPCS: i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
-// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
-fun id(arg: Short): Short {
-    return arg
-}
-
-// CHECK-LABEL: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
-// CHECK-LABEL-AAPCS: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
-// CHECK-LABEL-WINDOWSX64: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
-fun id(arg: Int): Int {
-    return arg
-}
-
-// CHECK-LABEL: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
-// CHECK-LABEL-AAPCS: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
-// CHECK-LABEL-WINDOWSX64: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
-fun id(arg: Long): Long {
-    return arg
-}
-
-// CHECK-LABEL: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
-// CHECK-LABEL-AAPCS: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
-// CHECK-LABEL-WINDOWSX64: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
-fun id(arg: Float): Float {
-    return arg
-}
-
-// CHECK-LABEL: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
-// CHECK-LABEL-AAPCS: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
-// CHECK-LABEL-WINDOWSX64: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
-fun id(arg: Double): Double {
-    return arg
-}
-
-// CHECK-LABEL: define zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext %0)
-// CHECK-LABEL-AAPCS: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
-// CHECK-LABEL-WINDOWSX64: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
-fun id(arg: UByte): UByte {
-    return arg
-}
-
-// CHECK-LABEL: define zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext %0)
-// CHECK-LABEL-AAPCS: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
-// CHECK-LABEL-WINDOWSX64: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
-fun id(arg: UShort): UShort {
-    return arg
-}
-
-// CHECK-LABEL: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
-// CHECK-LABEL-AAPCS: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
-// CHECK-LABEL-WINDOWSX64: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
-fun id(arg: UInt): UInt {
-    return arg
-}
-
-// CHECK-LABEL: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
-// CHECK-LABEL-AAPCS: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
-// CHECK-LABEL-WINDOWSX64: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
-fun id(arg: ULong): ULong {
-    return arg
-}
-
-fun checkPrimitives() {
-    // CHECK: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
-    // CHECK-AAPCS: call i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 {{.*}})
-    // CHECK-WINDOWSX64: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
-    id(true)
-    // CHECK: call signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext {{.*}})
-    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
-    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
-    id(0.toByte())
-    // CHECK: call zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext {{.*}})
-    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
-    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
-    id('a')
-    // CHECK: call signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext {{.*}})
-    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
-    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
-    id(0.toShort())
-    // CHECK: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
-    // CHECK-AAPCS: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
-    // CHECK-WINDOWSX64: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
-    id(0)
-    // CHECK: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
-    // CHECK-AAPCS: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
-    // CHECK-WINDOWSX64: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
-    id(0L)
-    // CHECK: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
-    // CHECK-AAPCS: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
-    // CHECK-WINDOWSX64: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
-    id(0.5f)
-    // CHECK: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
-    // CHECK-AAPCS: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
-    // CHECK-WINDOWSX64: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
-    id(0.5)
-    // CHECK: call zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext {{.*}})
-    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
-    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
-    id(0.toUByte())
-    // CHECK: call zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext {{.*}})
-    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
-    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
-    id(0.toUShort())
-    // CHECK: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
-    // CHECK-AAPCS: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
-    // CHECK-WINDOWSX64: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
-    id(15u)
-    // CHECK: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
-    // CHECK-AAPCS: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
-    // CHECK-WINDOWSX64: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
-    id(15uL)
-}
-
-value class CharWrapper(val ch: Char)
-
-// CHECK-LABEL: zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext %0)
-// CHECK-LABEL-AAPCS: i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
-// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
-fun id(arg: CharWrapper): CharWrapper {
-    return arg
-}
-
-// Check that value classes doesn't affect parameter attributes
-
-fun checkInlineClasses() {
-    // CHECK: call zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext {{.*}})
-    // CHECK-AAPCS: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
-    // CHECK-WINDOWSX64: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
-    id(CharWrapper('c'))
-}
-
-// CHECK-LABEL: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-// CHECK-LABEL-AAPCS: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-// CHECK-LABEL-WINDOWSX64: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-fun nullableId(arg: Byte?): Byte? {
-    return arg
-}
-
-// CHECK-LABEL: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-// CHECK-LABEL-AAPCS: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-// CHECK-LABEL-WINDOWSX64: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
-fun nullableId(arg: CharWrapper?): CharWrapper? {
-    return arg
-}
-
-// Check that we don't pass primitive-specific attributes to their boxes
-fun checkBoxes() {
-    // CHECK: call %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    // CHECK-AAPCS: call %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    // CHECK-WINDOWSX64: call %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    nullableId(1.toByte())
-    // CHECK: call %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    // CHECK-AAPCS: call %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    // CHECK-WINDOWSX64: call %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
-    nullableId(CharWrapper('a'))
-}
-
-// CHECK-LABEL: void @"kfun:#main(){}"()
-// CHECK-LABEL-AAPCS: void @"kfun:#main(){}"()
-// CHECK-LABEL-WINDOWSX64: void @"kfun:#main(){}"()
-fun main() {
-    checkPrimitives()
-    checkInlineClasses()
-    checkBoxes()
-}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/single_tls_load.kt b/kotlin-native/backend.native/tests/filecheck/single_tls_load.kt
deleted file mode 100644
index 92e299fe153..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/single_tls_load.kt
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-class Wrapper(x: Int)
-
-// CHECK-LABEL: "kfun:#f(kotlin.Int;kotlin.String){}kotlin.String"
-fun f(x: Int, s: String): String {
-    // CHECK: _ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E
-    // CHECK-NOT: _ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E
-    if (x < 0) throw IllegalStateException()
-    if (x > 0) return f(x - 1, s)
-    val b = Wrapper(2)
-    val a = listOf(x, x, Wrapper(1), 2, x)
-    return buildString {
-        for (i in a) { appendLine("$s i") }
-    }
-// CHECK: {{^}$}}
-}
-
-fun main() { println(f(10, "123456")) }
diff --git a/kotlin-native/backend.native/tests/filecheck/smoke0.kt b/kotlin-native/backend.native/tests/filecheck/smoke0.kt
deleted file mode 100644
index 2426abc7912..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/smoke0.kt
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-// CHECK-LABEL: "kfun:#id(kotlin.Any?){}kotlin.Any?"
-fun id(a: Any?): Any? {
-    return a
-// CHECK-LABEL: epilogue
-}
-
-// CHECK-LABEL: "kfun:#main(){}"
-fun main() {
-    // CHECK: call %struct.ObjHeader* @"kfun:#id(kotlin.Any?){}kotlin.Any?"
-    val x = id("Hello")
-    // CHECK: call void @"kfun:kotlin.io#println(kotlin.Any?){}"(%struct.ObjHeader* {{.*}})
-    println(x)
-// CHECK-LABEL: epilogue
-}
\ No newline at end of file
diff --git a/kotlin-native/backend.native/tests/filecheck/when.kt b/kotlin-native/backend.native/tests/filecheck/when.kt
deleted file mode 100644
index d5f2189f38b..00000000000
--- a/kotlin-native/backend.native/tests/filecheck/when.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-var i = 1
-fun main() {
-    println(when(i) {
-        0 -> 10
-        1 -> 11
-        2 -> 12
-        else -> 13
-    })
-}
-// CHECK-LABEL: define void @"kfun:#main(){}"()
-// CHECK: when_case
-// CHECK: when_next
-// CHECK: when_case1
-// CHECK: when_next2
-// CHECK: when_case3
-// CHECK: when_next4
-// CHECK: when_exit
-// CHECK: call void @"kfun:kotlin.io#println(kotlin.Any?)
-// CHECK: ret void
diff --git a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestGenerated.java b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestGenerated.java
index 6cd742b8593..d95dcb99264 100644
--- a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestGenerated.java
+++ b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestGenerated.java
@@ -15025,6 +15025,315 @@ public class FirNativeCodegenBoxTestGenerated extends AbstractNativeCodegenBoxTe
             }
         }
 
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck")
+        @TestDataPath("$PROJECT_ROOT")
+        @Tag("frontend-fir")
+        @FirPipeline()
+        @UseExtTestCaseGroupProvider()
+        public class FileCheck {
+            @Test
+            @TestMetadata("adopted_function_reference.kt")
+            public void testAdopted_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt");
+            }
+
+            @Test
+            public void testAllFilesPresentInFileCheck() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+            }
+
+            @Test
+            @TestMetadata("atomics.kt")
+            public void testAtomics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/atomics.kt");
+            }
+
+            @Test
+            @TestMetadata("bce.kt")
+            public void testBce() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/bce.kt");
+            }
+
+            @Test
+            @TestMetadata("constants_merge.kt")
+            public void testConstants_merge() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/constants_merge.kt");
+            }
+
+            @Test
+            @TestMetadata("default_parameters_dont_box.kt")
+            public void testDefault_parameters_dont_box() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt");
+            }
+
+            @Test
+            @TestMetadata("enum_when.kt")
+            public void testEnum_when() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/enum_when.kt");
+            }
+
+            @Test
+            @TestMetadata("escape_analysis.kt")
+            public void testEscape_analysis() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/escape_analysis.kt");
+            }
+
+            @Test
+            @TestMetadata("force_arm_instruction_set.kt")
+            public void testForce_arm_instruction_set() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt");
+            }
+
+            @Test
+            @TestMetadata("function_attributes_at_callsite.kt")
+            public void testFunction_attributes_at_callsite() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt");
+            }
+
+            @Test
+            @TestMetadata("generic_function_references.kt")
+            public void testGeneric_function_references() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/generic_function_references.kt");
+            }
+
+            @Test
+            @TestMetadata("intrinsics.kt")
+            public void testIntrinsics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/intrinsics.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_class.kt")
+            public void testKt49847_class() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_class.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic.kt")
+            public void testKt49847_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic_receiver.kt")
+            public void testKt49847_generic_receiver() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any.kt")
+            public void testKt49847_sam_Any() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any_generic.kt")
+            public void testKt49847_sam_Any_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int.kt")
+            public void testKt49847_sam_Int() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int_generic.kt")
+            public void testKt49847_sam_Int_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_simple_function_reference.kt")
+            public void testKt49847_simple_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt");
+            }
+
+            @Test
+            @TestMetadata("kt58654.kt")
+            public void testKt58654() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt58654.kt");
+            }
+
+            @Test
+            @TestMetadata("no_frame_on_constant_object_access.kt")
+            public void testNo_frame_on_constant_object_access() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt");
+            }
+
+            @Test
+            @TestMetadata("replace_invoke_with_call.kt")
+            public void testReplace_invoke_with_call() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt");
+            }
+
+            @Test
+            @TestMetadata("signext_zeroext0.kt")
+            public void testSignext_zeroext0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt");
+            }
+
+            @Test
+            @TestMetadata("single_tls_load.kt")
+            public void testSingle_tls_load() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/single_tls_load.kt");
+            }
+
+            @Test
+            @TestMetadata("smoke0.kt")
+            public void testSmoke0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/smoke0.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_returnNothing.kt")
+            public void testSuspend_returnNothing() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_functions.kt")
+            public void testSuspend_tailcalls_functions() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_lambdas.kt")
+            public void testSuspend_tailcalls_lambdas() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt");
+            }
+
+            @Test
+            @TestMetadata("when.kt")
+            public void testWhen() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/when.kt");
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+            @TestDataPath("$PROJECT_ROOT")
+            @Tag("frontend-fir")
+            @FirPipeline()
+            @UseExtTestCaseGroupProvider()
+            public class Kt53261 {
+                @Test
+                public void testAllFilesPresentInKt53261() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53261_inline_unbox.kt")
+                public void testKt53261_inline_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_CPointer.kt")
+                public void testKt53261_noinline_CPointer() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NativePointed.kt")
+                public void testKt53261_noinline_NativePointed() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NonNullNativePtr.kt")
+                public void testKt53261_noinline_NonNullNativePtr() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_StableRef.kt")
+                public void testKt53261_noinline_StableRef() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UByteArray.kt")
+                public void testKt53261_noinline_UByteArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UIntArray.kt")
+                public void testKt53261_noinline_UIntArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_ULongArray.kt")
+                public void testKt53261_noinline_ULongArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UShortArray.kt")
+                public void testKt53261_noinline_UShortArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_value_unbox.kt")
+                public void testKt53261_noinline_value_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt");
+                }
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+            @TestDataPath("$PROJECT_ROOT")
+            @Tag("frontend-fir")
+            @FirPipeline()
+            @UseExtTestCaseGroupProvider()
+            public class StringConcatenationTypeNarrowing {
+                @Test
+                public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_generated.kt")
+                public void testKt53119_append_generated() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_manual.kt")
+                public void testKt53119_append_manual() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_extension.kt")
+                public void testKt53119_plus_extension() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_generated_noescape.kt")
+                public void testKt53119_plus_generated_noescape() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_member.kt")
+                public void testKt53119_plus_member() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_side_effect.kt")
+                public void testKt53119_side_effect() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+                }
+            }
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/finally")
         @TestDataPath("$PROJECT_ROOT")
diff --git a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestNoPLGenerated.java b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestNoPLGenerated.java
index f570ffe2b2c..f846c988baa 100644
--- a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestNoPLGenerated.java
+++ b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/FirNativeCodegenBoxTestNoPLGenerated.java
@@ -15383,6 +15383,321 @@ public class FirNativeCodegenBoxTestNoPLGenerated extends AbstractNativeCodegenB
             }
         }
 
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck")
+        @TestDataPath("$PROJECT_ROOT")
+        @Tag("frontend-fir")
+        @FirPipeline()
+        @UseExtTestCaseGroupProvider()
+        @UsePartialLinkage(mode = Mode.DISABLED)
+        @Tag("no-partial-linkage-may-be-skipped")
+        public class FileCheck {
+            @Test
+            @TestMetadata("adopted_function_reference.kt")
+            public void testAdopted_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt");
+            }
+
+            @Test
+            public void testAllFilesPresentInFileCheck() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+            }
+
+            @Test
+            @TestMetadata("atomics.kt")
+            public void testAtomics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/atomics.kt");
+            }
+
+            @Test
+            @TestMetadata("bce.kt")
+            public void testBce() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/bce.kt");
+            }
+
+            @Test
+            @TestMetadata("constants_merge.kt")
+            public void testConstants_merge() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/constants_merge.kt");
+            }
+
+            @Test
+            @TestMetadata("default_parameters_dont_box.kt")
+            public void testDefault_parameters_dont_box() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt");
+            }
+
+            @Test
+            @TestMetadata("enum_when.kt")
+            public void testEnum_when() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/enum_when.kt");
+            }
+
+            @Test
+            @TestMetadata("escape_analysis.kt")
+            public void testEscape_analysis() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/escape_analysis.kt");
+            }
+
+            @Test
+            @TestMetadata("force_arm_instruction_set.kt")
+            public void testForce_arm_instruction_set() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt");
+            }
+
+            @Test
+            @TestMetadata("function_attributes_at_callsite.kt")
+            public void testFunction_attributes_at_callsite() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt");
+            }
+
+            @Test
+            @TestMetadata("generic_function_references.kt")
+            public void testGeneric_function_references() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/generic_function_references.kt");
+            }
+
+            @Test
+            @TestMetadata("intrinsics.kt")
+            public void testIntrinsics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/intrinsics.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_class.kt")
+            public void testKt49847_class() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_class.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic.kt")
+            public void testKt49847_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic_receiver.kt")
+            public void testKt49847_generic_receiver() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any.kt")
+            public void testKt49847_sam_Any() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any_generic.kt")
+            public void testKt49847_sam_Any_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int.kt")
+            public void testKt49847_sam_Int() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int_generic.kt")
+            public void testKt49847_sam_Int_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_simple_function_reference.kt")
+            public void testKt49847_simple_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt");
+            }
+
+            @Test
+            @TestMetadata("kt58654.kt")
+            public void testKt58654() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt58654.kt");
+            }
+
+            @Test
+            @TestMetadata("no_frame_on_constant_object_access.kt")
+            public void testNo_frame_on_constant_object_access() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt");
+            }
+
+            @Test
+            @TestMetadata("replace_invoke_with_call.kt")
+            public void testReplace_invoke_with_call() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt");
+            }
+
+            @Test
+            @TestMetadata("signext_zeroext0.kt")
+            public void testSignext_zeroext0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt");
+            }
+
+            @Test
+            @TestMetadata("single_tls_load.kt")
+            public void testSingle_tls_load() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/single_tls_load.kt");
+            }
+
+            @Test
+            @TestMetadata("smoke0.kt")
+            public void testSmoke0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/smoke0.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_returnNothing.kt")
+            public void testSuspend_returnNothing() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_functions.kt")
+            public void testSuspend_tailcalls_functions() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_lambdas.kt")
+            public void testSuspend_tailcalls_lambdas() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt");
+            }
+
+            @Test
+            @TestMetadata("when.kt")
+            public void testWhen() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/when.kt");
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+            @TestDataPath("$PROJECT_ROOT")
+            @Tag("frontend-fir")
+            @FirPipeline()
+            @UseExtTestCaseGroupProvider()
+            @UsePartialLinkage(mode = Mode.DISABLED)
+            @Tag("no-partial-linkage-may-be-skipped")
+            public class Kt53261 {
+                @Test
+                public void testAllFilesPresentInKt53261() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53261_inline_unbox.kt")
+                public void testKt53261_inline_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_CPointer.kt")
+                public void testKt53261_noinline_CPointer() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NativePointed.kt")
+                public void testKt53261_noinline_NativePointed() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NonNullNativePtr.kt")
+                public void testKt53261_noinline_NonNullNativePtr() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_StableRef.kt")
+                public void testKt53261_noinline_StableRef() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UByteArray.kt")
+                public void testKt53261_noinline_UByteArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UIntArray.kt")
+                public void testKt53261_noinline_UIntArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_ULongArray.kt")
+                public void testKt53261_noinline_ULongArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UShortArray.kt")
+                public void testKt53261_noinline_UShortArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_value_unbox.kt")
+                public void testKt53261_noinline_value_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt");
+                }
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+            @TestDataPath("$PROJECT_ROOT")
+            @Tag("frontend-fir")
+            @FirPipeline()
+            @UseExtTestCaseGroupProvider()
+            @UsePartialLinkage(mode = Mode.DISABLED)
+            @Tag("no-partial-linkage-may-be-skipped")
+            public class StringConcatenationTypeNarrowing {
+                @Test
+                public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_generated.kt")
+                public void testKt53119_append_generated() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_manual.kt")
+                public void testKt53119_append_manual() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_extension.kt")
+                public void testKt53119_plus_extension() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_generated_noescape.kt")
+                public void testKt53119_plus_generated_noescape() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_member.kt")
+                public void testKt53119_plus_member() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_side_effect.kt")
+                public void testKt53119_side_effect() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+                }
+            }
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/finally")
         @TestDataPath("$PROJECT_ROOT")
diff --git a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestGenerated.java b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestGenerated.java
index f6a3cfdb4b5..c2ef3cb2843 100644
--- a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestGenerated.java
+++ b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestGenerated.java
@@ -14847,6 +14847,312 @@ public class NativeCodegenBoxTestGenerated extends AbstractNativeCodegenBoxTest
             }
         }
 
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck")
+        @TestDataPath("$PROJECT_ROOT")
+        @UseExtTestCaseGroupProvider()
+        @DisabledTestsIfProperty(sourceLocations = { "compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt", "compiler/testData/codegen/box/multiplatform/defaultArguments/*.kt", "compiler/testData/codegen/box/multiplatform/migratedOldTests/*.kt", "compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt" }, property = ClassLevelProperty.TEST_MODE, propertyValue = "ONE_STAGE_MULTI_MODULE")
+        public class FileCheck {
+            @Test
+            @TestMetadata("adopted_function_reference.kt")
+            public void testAdopted_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt");
+            }
+
+            @Test
+            public void testAllFilesPresentInFileCheck() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+            }
+
+            @Test
+            @TestMetadata("atomics.kt")
+            public void testAtomics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/atomics.kt");
+            }
+
+            @Test
+            @TestMetadata("bce.kt")
+            public void testBce() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/bce.kt");
+            }
+
+            @Test
+            @TestMetadata("constants_merge.kt")
+            public void testConstants_merge() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/constants_merge.kt");
+            }
+
+            @Test
+            @TestMetadata("default_parameters_dont_box.kt")
+            public void testDefault_parameters_dont_box() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt");
+            }
+
+            @Test
+            @TestMetadata("enum_when.kt")
+            public void testEnum_when() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/enum_when.kt");
+            }
+
+            @Test
+            @TestMetadata("escape_analysis.kt")
+            public void testEscape_analysis() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/escape_analysis.kt");
+            }
+
+            @Test
+            @TestMetadata("force_arm_instruction_set.kt")
+            public void testForce_arm_instruction_set() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt");
+            }
+
+            @Test
+            @TestMetadata("function_attributes_at_callsite.kt")
+            public void testFunction_attributes_at_callsite() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt");
+            }
+
+            @Test
+            @TestMetadata("generic_function_references.kt")
+            public void testGeneric_function_references() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/generic_function_references.kt");
+            }
+
+            @Test
+            @TestMetadata("intrinsics.kt")
+            public void testIntrinsics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/intrinsics.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_class.kt")
+            public void testKt49847_class() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_class.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic.kt")
+            public void testKt49847_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic_receiver.kt")
+            public void testKt49847_generic_receiver() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any.kt")
+            public void testKt49847_sam_Any() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any_generic.kt")
+            public void testKt49847_sam_Any_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int.kt")
+            public void testKt49847_sam_Int() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int_generic.kt")
+            public void testKt49847_sam_Int_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_simple_function_reference.kt")
+            public void testKt49847_simple_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt");
+            }
+
+            @Test
+            @TestMetadata("kt58654.kt")
+            public void testKt58654() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt58654.kt");
+            }
+
+            @Test
+            @TestMetadata("no_frame_on_constant_object_access.kt")
+            public void testNo_frame_on_constant_object_access() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt");
+            }
+
+            @Test
+            @TestMetadata("replace_invoke_with_call.kt")
+            public void testReplace_invoke_with_call() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt");
+            }
+
+            @Test
+            @TestMetadata("signext_zeroext0.kt")
+            public void testSignext_zeroext0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt");
+            }
+
+            @Test
+            @TestMetadata("single_tls_load.kt")
+            public void testSingle_tls_load() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/single_tls_load.kt");
+            }
+
+            @Test
+            @TestMetadata("smoke0.kt")
+            public void testSmoke0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/smoke0.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_returnNothing.kt")
+            public void testSuspend_returnNothing() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_functions.kt")
+            public void testSuspend_tailcalls_functions() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_lambdas.kt")
+            public void testSuspend_tailcalls_lambdas() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt");
+            }
+
+            @Test
+            @TestMetadata("when.kt")
+            public void testWhen() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/when.kt");
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+            @TestDataPath("$PROJECT_ROOT")
+            @UseExtTestCaseGroupProvider()
+            @DisabledTestsIfProperty(sourceLocations = { "compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt", "compiler/testData/codegen/box/multiplatform/defaultArguments/*.kt", "compiler/testData/codegen/box/multiplatform/migratedOldTests/*.kt", "compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt" }, property = ClassLevelProperty.TEST_MODE, propertyValue = "ONE_STAGE_MULTI_MODULE")
+            public class Kt53261 {
+                @Test
+                public void testAllFilesPresentInKt53261() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53261_inline_unbox.kt")
+                public void testKt53261_inline_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_CPointer.kt")
+                public void testKt53261_noinline_CPointer() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NativePointed.kt")
+                public void testKt53261_noinline_NativePointed() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NonNullNativePtr.kt")
+                public void testKt53261_noinline_NonNullNativePtr() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_StableRef.kt")
+                public void testKt53261_noinline_StableRef() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UByteArray.kt")
+                public void testKt53261_noinline_UByteArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UIntArray.kt")
+                public void testKt53261_noinline_UIntArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_ULongArray.kt")
+                public void testKt53261_noinline_ULongArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UShortArray.kt")
+                public void testKt53261_noinline_UShortArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_value_unbox.kt")
+                public void testKt53261_noinline_value_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt");
+                }
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+            @TestDataPath("$PROJECT_ROOT")
+            @UseExtTestCaseGroupProvider()
+            @DisabledTestsIfProperty(sourceLocations = { "compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt", "compiler/testData/codegen/box/multiplatform/defaultArguments/*.kt", "compiler/testData/codegen/box/multiplatform/migratedOldTests/*.kt", "compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt" }, property = ClassLevelProperty.TEST_MODE, propertyValue = "ONE_STAGE_MULTI_MODULE")
+            public class StringConcatenationTypeNarrowing {
+                @Test
+                public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_generated.kt")
+                public void testKt53119_append_generated() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_manual.kt")
+                public void testKt53119_append_manual() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_extension.kt")
+                public void testKt53119_plus_extension() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_generated_noescape.kt")
+                public void testKt53119_plus_generated_noescape() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_member.kt")
+                public void testKt53119_plus_member() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_side_effect.kt")
+                public void testKt53119_side_effect() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+                }
+            }
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/finally")
         @TestDataPath("$PROJECT_ROOT")
diff --git a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestNoPLGenerated.java b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestNoPLGenerated.java
index 5e22d07b13c..904188f47ac 100644
--- a/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestNoPLGenerated.java
+++ b/native/native.tests/tests-gen/org/jetbrains/kotlin/konan/test/blackbox/NativeCodegenBoxTestNoPLGenerated.java
@@ -15026,6 +15026,315 @@ public class NativeCodegenBoxTestNoPLGenerated extends AbstractNativeCodegenBoxT
             }
         }
 
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck")
+        @TestDataPath("$PROJECT_ROOT")
+        @UseExtTestCaseGroupProvider()
+        @UsePartialLinkage(mode = Mode.DISABLED)
+        @Tag("no-partial-linkage-may-be-skipped")
+        public class FileCheck {
+            @Test
+            @TestMetadata("adopted_function_reference.kt")
+            public void testAdopted_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/adopted_function_reference.kt");
+            }
+
+            @Test
+            public void testAllFilesPresentInFileCheck() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+            }
+
+            @Test
+            @TestMetadata("atomics.kt")
+            public void testAtomics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/atomics.kt");
+            }
+
+            @Test
+            @TestMetadata("bce.kt")
+            public void testBce() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/bce.kt");
+            }
+
+            @Test
+            @TestMetadata("constants_merge.kt")
+            public void testConstants_merge() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/constants_merge.kt");
+            }
+
+            @Test
+            @TestMetadata("default_parameters_dont_box.kt")
+            public void testDefault_parameters_dont_box() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/default_parameters_dont_box.kt");
+            }
+
+            @Test
+            @TestMetadata("enum_when.kt")
+            public void testEnum_when() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/enum_when.kt");
+            }
+
+            @Test
+            @TestMetadata("escape_analysis.kt")
+            public void testEscape_analysis() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/escape_analysis.kt");
+            }
+
+            @Test
+            @TestMetadata("force_arm_instruction_set.kt")
+            public void testForce_arm_instruction_set() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/force_arm_instruction_set.kt");
+            }
+
+            @Test
+            @TestMetadata("function_attributes_at_callsite.kt")
+            public void testFunction_attributes_at_callsite() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/function_attributes_at_callsite.kt");
+            }
+
+            @Test
+            @TestMetadata("generic_function_references.kt")
+            public void testGeneric_function_references() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/generic_function_references.kt");
+            }
+
+            @Test
+            @TestMetadata("intrinsics.kt")
+            public void testIntrinsics() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/intrinsics.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_class.kt")
+            public void testKt49847_class() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_class.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic.kt")
+            public void testKt49847_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_generic_receiver.kt")
+            public void testKt49847_generic_receiver() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_generic_receiver.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any.kt")
+            public void testKt49847_sam_Any() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Any_generic.kt")
+            public void testKt49847_sam_Any_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Any_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int.kt")
+            public void testKt49847_sam_Int() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_sam_Int_generic.kt")
+            public void testKt49847_sam_Int_generic() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_sam_Int_generic.kt");
+            }
+
+            @Test
+            @TestMetadata("kt49847_simple_function_reference.kt")
+            public void testKt49847_simple_function_reference() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt49847_simple_function_reference.kt");
+            }
+
+            @Test
+            @TestMetadata("kt58654.kt")
+            public void testKt58654() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/kt58654.kt");
+            }
+
+            @Test
+            @TestMetadata("no_frame_on_constant_object_access.kt")
+            public void testNo_frame_on_constant_object_access() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/no_frame_on_constant_object_access.kt");
+            }
+
+            @Test
+            @TestMetadata("replace_invoke_with_call.kt")
+            public void testReplace_invoke_with_call() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/replace_invoke_with_call.kt");
+            }
+
+            @Test
+            @TestMetadata("signext_zeroext0.kt")
+            public void testSignext_zeroext0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/signext_zeroext0.kt");
+            }
+
+            @Test
+            @TestMetadata("single_tls_load.kt")
+            public void testSingle_tls_load() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/single_tls_load.kt");
+            }
+
+            @Test
+            @TestMetadata("smoke0.kt")
+            public void testSmoke0() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/smoke0.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_returnNothing.kt")
+            public void testSuspend_returnNothing() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_returnNothing.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_functions.kt")
+            public void testSuspend_tailcalls_functions() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_functions.kt");
+            }
+
+            @Test
+            @TestMetadata("suspend_tailcalls_lambdas.kt")
+            public void testSuspend_tailcalls_lambdas() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/suspend_tailcalls_lambdas.kt");
+            }
+
+            @Test
+            @TestMetadata("when.kt")
+            public void testWhen() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/when.kt");
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+            @TestDataPath("$PROJECT_ROOT")
+            @UseExtTestCaseGroupProvider()
+            @UsePartialLinkage(mode = Mode.DISABLED)
+            @Tag("no-partial-linkage-may-be-skipped")
+            public class Kt53261 {
+                @Test
+                public void testAllFilesPresentInKt53261() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53261_inline_unbox.kt")
+                public void testKt53261_inline_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_inline_unbox.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_CPointer.kt")
+                public void testKt53261_noinline_CPointer() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_CPointer.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NativePointed.kt")
+                public void testKt53261_noinline_NativePointed() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NativePointed.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_NonNullNativePtr.kt")
+                public void testKt53261_noinline_NonNullNativePtr() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_NonNullNativePtr.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_StableRef.kt")
+                public void testKt53261_noinline_StableRef() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_StableRef.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UByteArray.kt")
+                public void testKt53261_noinline_UByteArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UByteArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UIntArray.kt")
+                public void testKt53261_noinline_UIntArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UIntArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_ULongArray.kt")
+                public void testKt53261_noinline_ULongArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_ULongArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_UShortArray.kt")
+                public void testKt53261_noinline_UShortArray() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_UShortArray.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53261_noinline_value_unbox.kt")
+                public void testKt53261_noinline_value_unbox() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/kt53261/kt53261_noinline_value_unbox.kt");
+                }
+            }
+
+            @Nested
+            @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+            @TestDataPath("$PROJECT_ROOT")
+            @UseExtTestCaseGroupProvider()
+            @UsePartialLinkage(mode = Mode.DISABLED)
+            @Tag("no-partial-linkage-may-be-skipped")
+            public class StringConcatenationTypeNarrowing {
+                @Test
+                public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.NATIVE, true);
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_generated.kt")
+                public void testKt53119_append_generated() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_generated.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_append_manual.kt")
+                public void testKt53119_append_manual() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_append_manual.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_extension.kt")
+                public void testKt53119_plus_extension() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_extension.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_generated_noescape.kt")
+                public void testKt53119_plus_generated_noescape() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_generated_noescape.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_plus_member.kt")
+                public void testKt53119_plus_member() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_plus_member.kt");
+                }
+
+                @Test
+                @TestMetadata("kt53119_side_effect.kt")
+                public void testKt53119_side_effect() throws Exception {
+                    runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+                }
+            }
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/finally")
         @TestDataPath("$PROJECT_ROOT")
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestCase.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestCase.kt
index 4941a85f6b8..5224519f00b 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestCase.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestCase.kt
@@ -188,7 +188,8 @@ internal class TestCase(
     val freeCompilerArgs: TestCompilerArgs,
     val nominalPackageName: PackageName,
     val checks: TestRunChecks,
-    val extras: Extras
+    val extras: Extras,
+    val fileCheckStage: String? = null, // KT-62157: TODO move it to extras
 ) {
     sealed interface Extras
     class NoTestRunnerExtras(val entryPoint: String, val inputDataFile: File? = null, val arguments: List<String> = emptyList()) : Extras
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestDirectives.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestDirectives.kt
index 829e76da804..7f85b949f13 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestDirectives.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/TestDirectives.kt
@@ -144,6 +144,10 @@ internal object TestDirectives : SimpleDirectivesContainer() {
     val FIR_IDENTICAL by directive(
         description = "Test behavior should be identical for FIR testing"
     )
+
+    val FILECHECK_STAGE by stringDirective(
+        description = "Specify a LLVM stage to dump LLVM IR after, and check it with LLVM FileCheck using its directives in test file"
+    )
 }
 
 internal enum class TestKind {
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilation.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilation.kt
index 907ff8a3206..90a9d0b85c8 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilation.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilation.kt
@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.konan.properties.resolvablePropertyList
 import org.jetbrains.kotlin.konan.test.blackbox.support.*
 import org.jetbrains.kotlin.konan.test.blackbox.support.TestCase.*
 import org.jetbrains.kotlin.konan.test.blackbox.support.TestModule.Companion.allDependsOn
+import org.jetbrains.kotlin.konan.test.blackbox.support.compilation.ExecutableCompilation.Companion.applyFileCheckArgs
 import org.jetbrains.kotlin.konan.test.blackbox.support.compilation.ExecutableCompilation.Companion.applyPartialLinkageArgs
 import org.jetbrains.kotlin.konan.test.blackbox.support.compilation.ExecutableCompilation.Companion.applyTestRunnerSpecificArgs
 import org.jetbrains.kotlin.konan.test.blackbox.support.compilation.ExecutableCompilation.Companion.assertTestDumpFileNotEmptyIfExists
@@ -362,6 +363,7 @@ internal class ExecutableCompilation(
             }
         }
         applyPartialLinkageArgs(partialLinkageConfig)
+        applyFileCheckArgs(expectedArtifact.fileCheckStage, expectedArtifact.fileCheckDump)
         super.applySpecificArgs(argsBuilder)
     }
 
@@ -403,6 +405,13 @@ internal class ExecutableCompilation(
                     add("-Xpartial-linkage-loglevel=${logLevel.name.lowercase()}")
             }
         }
+
+        internal fun ArgsBuilder.applyFileCheckArgs(fileCheckStage: String?, fileCheckDump: File?) =
+            fileCheckStage?.let {
+                add("-Xllvm-variant=dev")  // FileCheck utility is provided in `LLVM dev`, not `LLVM user`
+                add("-Xsave-llvm-ir-after=$it")
+                add("-Xsave-llvm-ir-directory=${fileCheckDump!!.parent}")
+            }
     }
 }
 
@@ -464,6 +473,7 @@ internal class StaticCacheCompilation(
             add("-Xmake-per-file-cache")
 
         applyPartialLinkageArgs(partialLinkageConfig)
+        applyFileCheckArgs(expectedArtifact.fileCheckStage, expectedArtifact.fileCheckDump)
     }
 
     override fun applyDependencies(argsBuilder: ArgsBuilder): Unit = with(argsBuilder) {
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationArtifact.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationArtifact.kt
index 98bf64d9a7d..6e97a8d9eaa 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationArtifact.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationArtifact.kt
@@ -15,14 +15,22 @@ internal sealed interface TestCompilationArtifact {
         override val logFile: File get() = klibFile.resolveSibling("${klibFile.name}.log")
     }
 
-    data class KLIBStaticCache(val cacheDir: File, val klib: KLIB) : TestCompilationArtifact {
+    data class KLIBStaticCache(val cacheDir: File, val klib: KLIB, val fileCheckStage: String? = null) : TestCompilationArtifact {
         override val logFile: File get() = cacheDir.resolve("${klib.klibFile.nameWithoutExtension}-cache.log")
+        val fileCheckDump: File?
+            get() = fileCheckStage?.let {
+                cacheDir.resolveSibling("out.$it.ll")
+            }
     }
 
-    data class Executable(val executableFile: File) : TestCompilationArtifact {
+    data class Executable(val executableFile: File, val fileCheckStage: String? = null) : TestCompilationArtifact {
         val path: String get() = executableFile.path
         override val logFile: File get() = executableFile.resolveSibling("${executableFile.name}.log")
         val testDumpFile: File get() = executableFile.resolveSibling("${executableFile.name}.dump")
+        val fileCheckDump: File?
+            get() = fileCheckStage?.let {
+                executableFile.resolveSibling("out.$it.ll")
+            }
     }
 
     data class ObjCFramework(private val buildDir: File, val frameworkName: String) : TestCompilationArtifact {
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationFactory.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationFactory.kt
index 35a193402e9..f4c70aceaa6 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationFactory.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/compilation/TestCompilationFactory.kt
@@ -117,7 +117,10 @@ internal class TestCompilationFactory {
         // Long pass.
         val freeCompilerArgs = rootModules.first().testCase.freeCompilerArgs // Should be identical inside the same test case group.
         val extras = testCases.first().extras // Should be identical inside the same test case group.
-        val executableArtifact = Executable(settings.artifactFileForExecutable(rootModules))
+        val fileCheckStage = testCases.map { it.fileCheckStage }.singleOrNull()
+        if (fileCheckStage != null)
+            require(testCases.size == 1) { "FILECHECK-enabled test must be standalone" }
+        val executableArtifact = Executable(settings.artifactFileForExecutable(rootModules), fileCheckStage)
 
         val (
             dependenciesToCompileExecutable: Iterable<CompiledDependency<*>>,
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/ExtTestCaseGroupProvider.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/ExtTestCaseGroupProvider.kt
index 740d4a039b8..b1eb83f6609 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/ExtTestCaseGroupProvider.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/ExtTestCaseGroupProvider.kt
@@ -21,6 +21,8 @@ import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.konan.test.blackbox.support.*
 import org.jetbrains.kotlin.konan.test.blackbox.support.TestCase.WithTestRunnerExtras
+import org.jetbrains.kotlin.konan.test.blackbox.support.TestDirectives.FILECHECK_STAGE
+import org.jetbrains.kotlin.konan.test.blackbox.support.runner.TestRunCheck
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.TestRunChecks
 import org.jetbrains.kotlin.konan.test.blackbox.support.settings.*
 import org.jetbrains.kotlin.konan.test.blackbox.support.util.*
@@ -75,6 +77,8 @@ internal class ExtTestCaseGroupProvider : TestCaseGroupProvider, TestDisposable(
                     customKlibs = settings.get(),
                     pipelineType = settings.get(),
                     testMode = settings.get(),
+                    cacheMode = settings.get(),
+                    optimizationMode = settings.get(),
                     timeouts = settings.get(),
                 )
 
@@ -99,8 +103,10 @@ private class ExtTestDataFile(
     testRoots: TestRoots,
     private val generatedSources: GeneratedSources,
     private val customKlibs: CustomKlibs,
-    private val pipelineType: PipelineType,
-    private val testMode: TestMode,
+    pipelineType: PipelineType,
+    testMode: TestMode,
+    cacheMode: CacheMode,
+    optimizationMode: OptimizationMode,
     private val timeouts: Timeouts,
 ) {
     private val structure by lazy {
@@ -144,6 +150,9 @@ private class ExtTestDataFile(
                 && INCOMPATIBLE_DIRECTIVES.none { it in structure.directives }
                 && structure.directives[API_VERSION_DIRECTIVE] !in INCOMPATIBLE_API_VERSIONS
                 && structure.directives[LANGUAGE_VERSION_DIRECTIVE] !in INCOMPATIBLE_LANGUAGE_VERSIONS
+                && !(FILECHECK_STAGE.name in structure.directives
+                     && (cacheMode as? CacheMode.WithStaticCache)?.useStaticCacheForUserLibraries == true)
+                && !(optimizationMode != OptimizationMode.OPT && structure.directives[FILECHECK_STAGE.name] == "OptimizeTLSDataLoads")
                 && !(testDataFileSettings.languageSettings.contains("+${LanguageFeature.MultiPlatformProjects.name}")
                      && pipelineType == PipelineType.K2
                      && testMode == TestMode.ONE_STAGE_MULTI_MODULE)
@@ -194,7 +203,7 @@ private class ExtTestDataFile(
         val entryPointFunctionFQN = findEntryPoint()
         generateTestLauncher(isStandaloneTest, entryPointFunctionFQN)
 
-        return doCreateTestCase(isStandaloneTest, sharedModules)
+        return doCreateTestCase(settings, isStandaloneTest, sharedModules)
     }
 
     /**
@@ -204,6 +213,7 @@ private class ExtTestDataFile(
      */
     private fun determineIfStandaloneTest(): Boolean = with(structure) {
         if (directives.contains(NATIVE_STANDALONE_DIRECTIVE)) return true
+        if (directives.contains(FILECHECK_STAGE.name)) return true
 
         var isStandaloneTest = false
 
@@ -502,6 +512,7 @@ private class ExtTestDataFile(
     }
 
     private fun doCreateTestCase(
+        settings: Settings,
         isStandaloneTest: Boolean,
         sharedModules: ThreadSafeCache<String, TestModule.Shared?>
     ): TestCase = with(structure) {
@@ -513,14 +524,16 @@ private class ExtTestDataFile(
                 }
             }
         )
-
+        val fileCheckStage = retrieveFileCheckStage()
         val testCase = TestCase(
             id = TestCaseId.TestDataFile(testDataFile),
             kind = if (isStandaloneTest) TestKind.STANDALONE else TestKind.REGULAR,
             modules = modules,
             freeCompilerArgs = assembleFreeCompilerArgs(),
             nominalPackageName = testDataFileSettings.nominalPackageName,
-            checks = TestRunChecks.Default(timeouts.executionTimeout),
+            checks = TestRunChecks.Default(timeouts.executionTimeout)
+                .copy(fileCheckMatcher = fileCheckStage?.let { TestRunCheck.FileCheckMatcher(settings, testDataFile) }),
+            fileCheckStage = fileCheckStage,
             extras = WithTestRunnerExtras(runnerType = TestRunnerType.DEFAULT)
         )
         testCase.initialize(
@@ -531,6 +544,20 @@ private class ExtTestDataFile(
         return testCase
     }
 
+    private fun retrieveFileCheckStage(): String? {
+        val fileCheckStages = structure.directives.multiValues(FILECHECK_STAGE.name)
+        return when (fileCheckStages.size) {
+            0 -> {
+                require(!isDirectiveDefined(testDataFile.readText(), FILECHECK_STAGE.name)) {
+                    "In ${testDataFile.absolutePath}, one argument for FILECHECK directive is needed: LLVM stage name, to dump bitcode after"
+                }
+                null
+            }
+            1 -> fileCheckStages.single()
+            else -> fail { "In ${testDataFile.absolutePath}, only one argument for FILECHECK directive is allowed: $fileCheckStages" }
+        }
+    }
+
     companion object {
         private val INCOMPATIBLE_DIRECTIVES = setOf("FULL_JDK", "JVM_TARGET", "DIAGNOSTICS")
 
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/StandardTestCaseGroupProvider.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/StandardTestCaseGroupProvider.kt
index 6dd50b36872..3fb9ac2f0d4 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/StandardTestCaseGroupProvider.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/group/StandardTestCaseGroupProvider.kt
@@ -227,7 +227,8 @@ internal class StandardTestCaseGroupProvider : TestCaseGroupProvider {
                 computeExecutionTimeoutCheck(settings, expectedTimeoutFailure),
                 computeExitCodeCheck(testKind, registeredDirectives, location),
                 computeOutputDataFileCheck(testDataFile, registeredDirectives, location),
-                lldbSpec?.let { OutputMatcher { output -> lldbSpec.checkLLDBOutput(output, settings.get()) } }
+                lldbSpec?.let { OutputMatcher { output -> lldbSpec.checkLLDBOutput(output, settings.get()) } },
+                fileCheckMatcher = null,
             ),
             extras = when (testKind) {
                 TestKind.STANDALONE_NO_TR -> {
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/AbstractLocalProcessRunner.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/AbstractLocalProcessRunner.kt
index fc8e96c0799..0ccd7db7f4b 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/AbstractLocalProcessRunner.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/AbstractLocalProcessRunner.kt
@@ -5,18 +5,22 @@
 
 package org.jetbrains.kotlin.konan.test.blackbox.support.runner
 
+import com.intellij.openapi.util.SystemInfo
 import com.intellij.openapi.util.text.StringUtilRt.convertLineSeparators
 import kotlinx.coroutines.*
+import org.jetbrains.kotlin.konan.target.Architecture
+import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.AbstractRunner.AbstractRun
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.TestRunCheck.ExecutionTimeout
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.TestRunCheck.ExitCode
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.UnfilteredProcessOutput.Companion.launchReader
+import org.jetbrains.kotlin.konan.test.blackbox.support.settings.KotlinNativeTargets
+import org.jetbrains.kotlin.konan.test.blackbox.support.settings.OptimizationMode
+import org.jetbrains.kotlin.konan.test.blackbox.support.settings.configurables
 import org.jetbrains.kotlin.konan.test.blackbox.support.util.TestOutputFilter
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toUpperCaseAsciiOnly
 import org.junit.jupiter.api.Assertions.fail
-import java.io.ByteArrayOutputStream
-import java.io.IOException
-import java.io.InputStream
-import java.io.OutputStream
+import java.io.*
 import java.util.concurrent.atomic.AtomicBoolean
 import kotlin.time.*
 
@@ -43,7 +47,7 @@ internal abstract class AbstractLocalProcessRunner<R>(protected val checks: Test
             val ignoreIOErrorsInProcessOutput = AtomicBoolean(false)
 
             val duration = measureTime {
-                process = ProcessBuilder(programArgs).directory(executable.executableFile.parentFile).start()
+                process = ProcessBuilder(programArgs).directory(executable.executable.executableFile.parentFile).start()
                 customizeProcess(process)
 
                 unfilteredOutputReader = launchReader(
@@ -76,6 +80,7 @@ internal abstract class AbstractLocalProcessRunner<R>(protected val checks: Test
             }
 
             RunResult(
+                testExecutable = executable,
                 exitCode = exitCode,
                 timeout = executionTimeout,
                 duration = duration,
@@ -140,6 +145,53 @@ internal abstract class LocalResultHandler<R>(
                         }
                     }
                 }
+                is TestRunCheck.FileCheckMatcher -> {
+                    val fileCheckExecutable = check.settings.configurables.absoluteLlvmHome + File.separator + "bin" + File.separator +
+                            if (SystemInfo.isWindows) "FileCheck.exe" else "FileCheck"
+                    require(File(fileCheckExecutable).exists()) {
+                        "$fileCheckExecutable does not exist. Make sure Distribution for `settings.configurables` " +
+                                "was created using `propertyOverrides` to specify development variant of LLVM instead of user variant."
+                    }
+                    val fileCheckDump = runResult.testExecutable.executable.fileCheckDump!!
+                    val fileCheckOut = File(fileCheckDump.absolutePath + ".out")
+                    val fileCheckErr = File(fileCheckDump.absolutePath + ".err")
+
+                    val testTarget = check.settings.get<KotlinNativeTargets>().testTarget
+                    val checkPrefixes = buildList {
+                        add("CHECK")
+                        add("CHECK-${testTarget.abiInfoString}")
+                        add("CHECK-${testTarget.name.toUpperCaseAsciiOnly()}")
+                        if (testTarget.family.isAppleFamily) {
+                            add("CHECK-APPLE")
+                        }
+                    }
+                    val optimizationMode = check.settings.get<OptimizationMode>().name
+                    val checkPrefixesWithOptMode = checkPrefixes.map { "$it-$optimizationMode" }
+                    val commaSeparatedCheckPrefixes = (checkPrefixes + checkPrefixesWithOptMode).joinToString(",")
+
+                    val result = ProcessBuilder(
+                        fileCheckExecutable,
+                        check.testDataFile.absolutePath,
+                        "--input-file",
+                        fileCheckDump.absolutePath,
+                        "--check-prefixes", commaSeparatedCheckPrefixes,
+                        "--allow-deprecated-dag-overlap" // TODO specify it via new test directive for `function_attributes_at_callsite.kt`
+                    ).redirectOutput(fileCheckOut)
+                        .redirectError(fileCheckErr)
+                        .start()
+                        .waitFor()
+                    val errText = fileCheckErr.readText()
+                    val outText = fileCheckOut.readText()
+                    verifyExpectation(result == 0 && errText.isEmpty() && outText.isEmpty()) {
+                        val shortOutText = outText.lines().take(100)
+                        val shortErrText = errText.lines().take(100)
+                        "FileCheck matching of ${fileCheckDump.absolutePath}\n" +
+                                "with '--check-prefixes $commaSeparatedCheckPrefixes'\n" +
+                                "failed with result=$result:\n" +
+                                shortOutText.joinToString("\n") + "\n" +
+                                shortErrText.joinToString("\n")
+                    }
+                }
             }
         }
 
@@ -183,3 +235,11 @@ private class UnfilteredProcessOutput {
         }
     }
 }
+
+// Shameless borrowing `val KonanTarget.abiInfo` from module `:kotlin-native:backend.native`, which cannot be imported here for now.
+val KonanTarget.abiInfoString: String
+    get() = when {
+        this == KonanTarget.MINGW_X64 -> "WINDOWSX64"
+        !family.isAppleFamily && architecture == Architecture.ARM64 -> "AAPCS"
+        else -> "DEFAULTABI"
+    }
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestNameExtractor.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestNameExtractor.kt
index 3d9ddff1208..0e424b4f8be 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestNameExtractor.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestNameExtractor.kt
@@ -16,7 +16,7 @@ internal class LocalTestNameExtractor(
     checks: TestRunChecks
 ) : AbstractLocalProcessRunner<Collection<TestName>>(checks) {
     override val visibleProcessName get() = "Test name extractor"
-    override val programArgs = listOf(executable.executableFile.path, "--ktest_list_tests")
+    override val programArgs = listOf(executable.executable.executableFile.path, "--ktest_list_tests")
     override val outputFilter get() = TestOutputFilter.NO_FILTERING
 
     override fun getLoggedParameters() = LoggedData.TestRunParameters(
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestRunner.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestRunner.kt
index 6394800998d..8c657f57e35 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestRunner.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/LocalTestRunner.kt
@@ -18,7 +18,7 @@ internal class LocalTestRunner(private val testRun: TestRun) : AbstractLocalProc
     override val executable get() = testRun.executable
 
     override val programArgs = buildList {
-        add(executable.executableFile.path)
+        add(executable.executable.executableFile.path)
         testRun.runParameters.forEach { it.applyTo(this) }
     }
 
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunResult.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunResult.kt
index e446921eb47..85c5ee9d27a 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunResult.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunResult.kt
@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.konan.test.blackbox.support.util.TestOutputFilter
 import kotlin.time.Duration
 
 internal data class RunResult(
+    val testExecutable: TestExecutable, // KT-62157: TODO extract out of RunResult and pass Pair(TestExecutable, RunResult)
     val exitCode: Int?,
     val timeout: Duration,
     val duration: Duration,
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunnerWithExecutor.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunnerWithExecutor.kt
index a9f0c4ae1eb..bc4ef927004 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunnerWithExecutor.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/RunnerWithExecutor.kt
@@ -41,7 +41,7 @@ internal class RunnerWithExecutor(
         val stdout = ByteArrayOutputStream()
         val stderr = ByteArrayOutputStream()
         val request = ExecuteRequest(
-            executableAbsolutePath = executable.executableFile.absolutePath,
+            executableAbsolutePath = executable.executable.executableFile.absolutePath,
             args = programArgs,
             stdin = stdin,
             stdout = stdout,
@@ -50,6 +50,7 @@ internal class RunnerWithExecutor(
         )
         val response = executor.execute(request)
         RunResult(
+            testExecutable = executable,
             exitCode = response.exitCode,
             timeout = request.timeout,
             duration = response.executionTime,
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRun.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRun.kt
index 51155e243a4..868845dcbf3 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRun.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRun.kt
@@ -17,7 +17,7 @@ import java.io.File
 import java.io.IOException
 
 internal class TestExecutable(
-    val executableFile: File,
+    val executable: Executable,
     val loggedCompilationToolCall: LoggedData.CompilerCall,
     val testNames: Collection<TestName>
 ) {
@@ -42,7 +42,7 @@ internal class TestExecutable(
             }
 
             return TestExecutable(
-                executableFile = compilationResult.resultingArtifact.executableFile,
+                executable = compilationResult.resultingArtifact,
                 loggedCompilationToolCall = compilationResult.loggedData,
                 testNames = testNames
             )
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunChecks.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunChecks.kt
index 478bfa78af4..fac2cd09a3c 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunChecks.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunChecks.kt
@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.konan.test.blackbox.support.runner
 
 import org.jetbrains.kotlin.konan.test.blackbox.support.runner.TestRunCheck.*
+import org.jetbrains.kotlin.konan.test.blackbox.support.settings.Settings
 import org.jetbrains.kotlin.utils.yieldIfNotNull
 import java.io.File
 import kotlin.time.Duration
@@ -24,13 +25,16 @@ internal sealed interface TestRunCheck {
     class OutputDataFile(val file: File) : TestRunCheck
 
     class OutputMatcher(val match: (String) -> Boolean): TestRunCheck
+
+    class FileCheckMatcher(val settings: Settings, val testDataFile: File): TestRunCheck
 }
 
-internal class TestRunChecks(
+internal data class TestRunChecks(
     val executionTimeoutCheck: ExecutionTimeout,
     private val exitCodeCheck: ExitCode,
     val outputDataFile: OutputDataFile?,
-    val outputMatcher: OutputMatcher?
+    val outputMatcher: OutputMatcher?,
+    val fileCheckMatcher: FileCheckMatcher?,
 ) : Iterable<TestRunCheck> {
 
     override fun iterator() = iterator {
@@ -38,6 +42,7 @@ internal class TestRunChecks(
         yield(exitCodeCheck)
         yieldIfNotNull(outputDataFile)
         yieldIfNotNull(outputMatcher)
+        yieldIfNotNull(fileCheckMatcher)
     }
 
     companion object {
@@ -47,7 +52,8 @@ internal class TestRunChecks(
             executionTimeoutCheck = ExecutionTimeout.ShouldNotExceed(timeout),
             exitCodeCheck = ExitCode.Expected(0),
             outputDataFile = null,
-            outputMatcher = null
+            outputMatcher = null,
+            fileCheckMatcher = null,
         )
     }
 }
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunners.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunners.kt
index 59b12e8b0d4..9e8c72628fa 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunners.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/runner/TestRunners.kt
@@ -23,9 +23,7 @@ internal object TestRunners {
             if (testTarget == hostTarget) {
                 LocalTestRunner(testRun)
             } else {
-                val nativeHome = get<KotlinNativeHome>()
-                val distribution = Distribution(nativeHome.dir.path)
-                val configurables = PlatformManager(distribution, true).platform(testTarget).configurables
+                val configurables = configurables
 
                 val executor = cached(
                     when {
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/settings/SettingsContainers.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/settings/SettingsContainers.kt
index f42c68e6c5c..1b3c0cd7ad3 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/settings/SettingsContainers.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/test/blackbox/support/settings/SettingsContainers.kt
@@ -5,6 +5,10 @@
 
 package org.jetbrains.kotlin.konan.test.blackbox.support.settings
 
+import org.jetbrains.kotlin.konan.target.Configurables
+import org.jetbrains.kotlin.konan.target.Distribution
+import org.jetbrains.kotlin.konan.target.HostManager
+import org.jetbrains.kotlin.konan.target.PlatformManager
 import org.jetbrains.kotlin.test.services.JUnit5Assertions.assertTrue
 import org.jetbrains.kotlin.test.services.JUnit5Assertions.fail
 import kotlin.reflect.KClass
@@ -59,3 +63,13 @@ internal class TestRunSettings(parent: TestClassSettings, settings: Iterable<Any
  */
 internal class SimpleTestClassSettings(parent: TestProcessSettings, settings: Iterable<Any>) : Settings(parent, settings)
 internal class SimpleTestRunSettings(parent: SimpleTestClassSettings, settings: Iterable<Any>) : Settings(parent, settings)
+
+internal val Settings.configurables: Configurables
+    get() {
+        val distribution = Distribution(
+            get<KotlinNativeHome>().dir.path,
+            // Development variant of LLVM is used to have utilities like FileCheck
+            propertyOverrides = mapOf("llvmHome.${HostManager.hostName}" to "\$llvm.${HostManager.hostName}.dev")
+        )
+        return PlatformManager(distribution, true).platform(get<KotlinNativeTargets>().testTarget).configurables
+    }
diff --git a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/FirWasmCodegenBoxTestGenerated.java b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/FirWasmCodegenBoxTestGenerated.java
index f91f0f27388..3c7263a4d9b 100644
--- a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/FirWasmCodegenBoxTestGenerated.java
+++ b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/FirWasmCodegenBoxTestGenerated.java
@@ -13880,6 +13880,42 @@ public class FirWasmCodegenBoxTestGenerated extends AbstractFirWasmCodegenBoxTes
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")
diff --git a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/K1WasmCodegenBoxTestGenerated.java b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/K1WasmCodegenBoxTestGenerated.java
index 2232da06178..3427709752d 100644
--- a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/K1WasmCodegenBoxTestGenerated.java
+++ b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/K1WasmCodegenBoxTestGenerated.java
@@ -13880,6 +13880,42 @@ public class K1WasmCodegenBoxTestGenerated extends AbstractK1WasmCodegenBoxTest
         }
     }
 
+    @Nested
+    @TestMetadata("compiler/testData/codegen/box/fileCheck")
+    @TestDataPath("$PROJECT_ROOT")
+    public class FileCheck {
+        @Test
+        public void testAllFilesPresentInFileCheck() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/kt53261")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Kt53261 {
+            @Test
+            public void testAllFilesPresentInKt53261() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/kt53261"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+            }
+        }
+
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing")
+        @TestDataPath("$PROJECT_ROOT")
+        public class StringConcatenationTypeNarrowing {
+            @Test
+            public void testAllFilesPresentInStringConcatenationTypeNarrowing() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
+            }
+
+            @Test
+            @TestMetadata("kt53119_side_effect.kt")
+            public void testKt53119_side_effect() throws Exception {
+                runTest("compiler/testData/codegen/box/fileCheck/stringConcatenationTypeNarrowing/kt53119_side_effect.kt");
+            }
+        }
+    }
+
     @Nested
     @TestMetadata("compiler/testData/codegen/box/finally")
     @TestDataPath("$PROJECT_ROOT")