Support non-trivial default argument values in expected functions on JVM

#KT-22818 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -100,7 +100,8 @@ import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.*;
 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.*;
 import static org.jetbrains.kotlin.codegen.inline.InlineCodegenUtilsKt.*;
 import static org.jetbrains.kotlin.resolve.BindingContext.*;
-import static org.jetbrains.kotlin.resolve.BindingContextUtils.*;
+import static org.jetbrains.kotlin.resolve.BindingContextUtils.getDelegationConstructorCall;
+import static org.jetbrains.kotlin.resolve.BindingContextUtils.isBoxedLocalCapturedInClosure;
 import static org.jetbrains.kotlin.resolve.DescriptorUtils.*;
 import static org.jetbrains.kotlin.resolve.jvm.AsmTypes.*;
 import static org.jetbrains.kotlin.types.expressions.ExpressionTypingUtils.isFunctionExpression;
@@ -2900,7 +2901,9 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
         while (cur != null) {
             ClassDescriptor thisDescriptor = cur.getThisDescriptor();
 
-            if (!isSuper && thisDescriptor == thisOrOuterClass) {
+            // We use equals on type constructors (instead of reference equality on classes) to support the case where default parameter
+            // values of actual functions loaded from the expected function refer to the expected class.
+            if (!isSuper && thisDescriptor.getTypeConstructor().equals(thisOrOuterClass.getTypeConstructor())) {
                 return result;
             }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/FrameMap.kt

@@ -21,10 +21,9 @@ import com.intellij.openapi.util.Trinity
 import gnu.trove.TObjectIntHashMap
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.org.objectweb.asm.Type
+import java.util.*
 
-import java.util.ArrayList
-
-class FrameMap : FrameMapBase<DeclarationDescriptor>()
+open class FrameMap : FrameMapBase<DeclarationDescriptor>()
 
 open class FrameMapBase<T : Any> {
     private val myVarIndex = TObjectIntHashMap<T>()
@@ -61,7 +60,7 @@ open class FrameMapBase<T : Any> {
         currentSize -= type.size
     }
 
-    fun getIndex(descriptor: T): Int {
+    open fun getIndex(descriptor: T): Int {
         return if (myVarIndex.contains(descriptor)) myVarIndex.get(descriptor) else -1
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/FrameMapWithExpectActualSupport.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.codegen
+
+import org.jetbrains.kotlin.descriptors.*
+import org.jetbrains.kotlin.resolve.multiplatform.ExpectedActualResolver
+import org.jetbrains.kotlin.resolve.scopes.receivers.ExtensionReceiver
+
+/**
+ * This [FrameMap] subclass substitutes values declared in the expected declaration with the corresponding value in the actual declaration,
+ * which is needed for the case when expected function declares parameters with default values, which refer to other parameters.
+ */
+class FrameMapWithExpectActualSupport(private val module: ModuleDescriptor) : FrameMap() {
+    override fun getIndex(descriptor: DeclarationDescriptor): Int {
+        val tmp = if (descriptor is ParameterDescriptor) findActualParameter(descriptor) ?: descriptor else descriptor
+        return super.getIndex(tmp)
+    }
+
+    private fun findActualParameter(parameter: ParameterDescriptor): ParameterDescriptor? {
+        val container = parameter.containingDeclaration
+        if (container !is CallableMemberDescriptor || !container.isExpect) return null
+
+        // Generation of value parameters is supported by the fact that FunctionCodegen.generateDefaultImplBody substitutes value parameters
+        // of the generated actual function with the parameters of the expected declaration in the first place.
+        // Generation of dispatch receiver parameters (this and outer receiver values) is supported
+        // in ExpressionCodegen.generateThisOrOuterFromContext by comparing classes by type constructor equality.
+        if (parameter !is ReceiverParameterDescriptor || parameter.value !is ExtensionReceiver) return null
+
+        val actual = with(ExpectedActualResolver) {
+            container.findCompatibleActualForExpected(module).firstOrNull()
+        }
+
+        return (actual as? CallableDescriptor)?.extensionReceiverParameter
+    }
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java

@@ -1360,7 +1360,7 @@ public class FunctionCodegen {
             @NotNull List<ValueParameterDescriptor> valueParameters,
             boolean isStatic
     ) {
-        FrameMap frameMap = new FrameMap();
+        FrameMap frameMap = new FrameMapWithExpectActualSupport(state.getModule());
         if (!isStatic) {
             frameMap.enterTemp(OBJECT_TYPE);
         }

compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND: JVM_IR
+
+// FILE: common.kt
+
+expect class C {
+    val value: String
+
+    fun test(result: String = value): String
+}
+
+// FILE: platform.kt
+
+actual class C(actual val value: String) {
+    actual fun test(result: String): String = result
+}
+
+fun box() = C("Fail").test("OK")

compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt

@@ -0,0 +1,16 @@
+// !LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND: JVM_IR
+
+// FILE: common.kt
+
+class Receiver(val value: String)
+
+expect fun Receiver.test(result: String = value): String
+
+// FILE: platform.kt
+
+actual fun Receiver.test(result: String): String {
+    return result
+}
+
+fun box() = Receiver("Fail").test("OK")

compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +MultiPlatformProjects
+// IGNORE_BACKEND: JVM_IR
+
+// FILE: common.kt
+
+class B(val value: Int)
+
+expect fun test(a: Int = 2, b: Int = B(a * 2).value, c: String = "${b}$a"): String
+
+// FILE: platform.kt
+
+actual fun test(a: Int, b: Int, c: String): String = c
+
+fun box(): String {
+    val result = test()
+    return if (result == "42") "OK" else "Fail: $result"
+}

compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt

@@ -0,0 +1,31 @@
+// !LANGUAGE: +MultiPlatformProjects
+// NO_CHECK_LAMBDA_INLINING
+// IGNORE_BACKEND: JVM_IR
+
+// FILE: 1.kt
+
+class C(val s1: String, val s2: String)
+
+expect fun C.test(r1: () -> String = { s1 }, r2: () -> String = this::s2): String
+
+actual inline fun C.test(r1: () -> String, r2: () -> String): String = r1() + r2()
+
+
+expect class D {
+    val s1: String
+    val s2: String
+
+    fun test(r1: () -> String = { s1 }, r2: () -> String = this::s2): String
+}
+
+actual class D(actual val s1: String, actual val s2: String) {
+    actual inline fun test(r1: () -> String, r2: () -> String): String = r1() + r2()
+}
+
+// FILE: 2.kt
+
+fun box(): String {
+    if (C("O", "K").test() != "OK") return "Fail extension receiver"
+    if (D("O", "K").test() != "OK") return "Fail dispatch receiver"
+    return "OK"
+}

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -15875,6 +15875,16 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/delegatedExpectedInterface.kt");
             }
 
+            @TestMetadata("dispatchReceiverValue.kt")
+            public void testDispatchReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt");
+            }
+
+            @TestMetadata("extensionReceiverValue.kt")
+            public void testExtensionReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt");
+            }
+
             @TestMetadata("function.kt")
             public void testFunction() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/function.kt");
@@ -15930,6 +15940,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/kt23739.kt");
             }
 
+            @TestMetadata("parametersInArgumentValues.kt")
+            public void testParametersInArgumentValues() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt");
+            }
+
             @TestMetadata("superCall.kt")
             public void testSuperCall() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/superCall.kt");

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxInlineCodegenTestGenerated.java

@@ -1890,6 +1890,37 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
         }
     }
 
+    @TestMetadata("compiler/testData/codegen/boxInline/multiplatform")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Multiplatform extends AbstractBlackBoxInlineCodegenTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInMultiplatform() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("compiler/testData/codegen/boxInline/multiplatform/defaultArguments")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class DefaultArguments extends AbstractBlackBoxInlineCodegenTest {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInDefaultArguments() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform/defaultArguments"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+            }
+
+            @TestMetadata("receiversAndParametersInLambda.kt")
+            public void testReceiversAndParametersInLambda() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt");
+            }
+        }
+    }
+
     @TestMetadata("compiler/testData/codegen/boxInline/noInline")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)

compiler/tests/org/jetbrains/kotlin/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java

@@ -1890,6 +1890,37 @@ public class CompileKotlinAgainstInlineKotlinTestGenerated extends AbstractCompi
         }
     }
 
+    @TestMetadata("compiler/testData/codegen/boxInline/multiplatform")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Multiplatform extends AbstractCompileKotlinAgainstInlineKotlinTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInMultiplatform() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("compiler/testData/codegen/boxInline/multiplatform/defaultArguments")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class DefaultArguments extends AbstractCompileKotlinAgainstInlineKotlinTest {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInDefaultArguments() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform/defaultArguments"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+            }
+
+            @TestMetadata("receiversAndParametersInLambda.kt")
+            public void testReceiversAndParametersInLambda() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt");
+            }
+        }
+    }
+
     @TestMetadata("compiler/testData/codegen/boxInline/noInline")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -15880,6 +15880,16 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/constructor.kt");
             }
 
+            @TestMetadata("dispatchReceiverValue.kt")
+            public void testDispatchReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt");
+            }
+
+            @TestMetadata("extensionReceiverValue.kt")
+            public void testExtensionReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt");
+            }
+
             @TestMetadata("function.kt")
             public void testFunction() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/function.kt");
@@ -15934,6 +15944,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             public void testKt23739() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/kt23739.kt");
             }
+
+            @TestMetadata("parametersInArgumentValues.kt")
+            public void testParametersInArgumentValues() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt");
+            }
         }
     }
 

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -15880,6 +15880,16 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/delegatedExpectedInterface.kt");
             }
 
+            @TestMetadata("dispatchReceiverValue.kt")
+            public void testDispatchReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt");
+            }
+
+            @TestMetadata("extensionReceiverValue.kt")
+            public void testExtensionReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt");
+            }
+
             @TestMetadata("function.kt")
             public void testFunction() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/function.kt");
@@ -15935,6 +15945,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/kt23739.kt");
             }
 
+            @TestMetadata("parametersInArgumentValues.kt")
+            public void testParametersInArgumentValues() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt");
+            }
+
             @TestMetadata("superCall.kt")
             public void testSuperCall() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/superCall.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxInlineCodegenTestGenerated.java

@@ -1890,6 +1890,37 @@ public class IrBlackBoxInlineCodegenTestGenerated extends AbstractIrBlackBoxInli
         }
     }
 
+    @TestMetadata("compiler/testData/codegen/boxInline/multiplatform")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Multiplatform extends AbstractIrBlackBoxInlineCodegenTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM_IR, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInMultiplatform() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM_IR, true);
+        }
+
+        @TestMetadata("compiler/testData/codegen/boxInline/multiplatform/defaultArguments")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class DefaultArguments extends AbstractIrBlackBoxInlineCodegenTest {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM_IR, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInDefaultArguments() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multiplatform/defaultArguments"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM_IR, true);
+            }
+
+            @TestMetadata("receiversAndParametersInLambda.kt")
+            public void testReceiversAndParametersInLambda() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/multiplatform/defaultArguments/receiversAndParametersInLambda.kt");
+            }
+        }
+    }
+
     @TestMetadata("compiler/testData/codegen/boxInline/noInline")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrJsCodegenBoxTestGenerated.java

@@ -12265,6 +12265,16 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/delegatedExpectedInterface.kt");
             }
 
+            @TestMetadata("dispatchReceiverValue.kt")
+            public void testDispatchReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt");
+            }
+
+            @TestMetadata("extensionReceiverValue.kt")
+            public void testExtensionReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt");
+            }
+
             @TestMetadata("function.kt")
             public void testFunction() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/function.kt");
@@ -12315,6 +12325,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/kt23739.kt");
             }
 
+            @TestMetadata("parametersInArgumentValues.kt")
+            public void testParametersInArgumentValues() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt");
+            }
+
             @TestMetadata("superCall.kt")
             public void testSuperCall() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/superCall.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -13360,6 +13360,16 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/delegatedExpectedInterface.kt");
             }
 
+            @TestMetadata("dispatchReceiverValue.kt")
+            public void testDispatchReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/dispatchReceiverValue.kt");
+            }
+
+            @TestMetadata("extensionReceiverValue.kt")
+            public void testExtensionReceiverValue() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/extensionReceiverValue.kt");
+            }
+
             @TestMetadata("function.kt")
             public void testFunction() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/function.kt");
@@ -13410,6 +13420,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/kt23739.kt");
             }
 
+            @TestMetadata("parametersInArgumentValues.kt")
+            public void testParametersInArgumentValues() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/parametersInArgumentValues.kt");
+            }
+
             @TestMetadata("superCall.kt")
             public void testSuperCall() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/defaultArguments/superCall.kt");