[K/N] Test for KT-50970

kotlin-native/backend.native/tests/build.gradle

@@ -178,6 +178,7 @@ run {
     // Add regular gradle test tasks
     dependsOn(tasksOf(Test))
     dependsOn(tasksOf(CoverageTest))
+    dependsOn(tasksOf(FileCheckTest))
     dependsOn(":kotlin-native:Interop:Indexer:check")
 }
 
@@ -195,7 +196,10 @@ task sanity {
     // Add regular gradle test tasks
     dependsOn(tasksOf(Test))
     dependsOn(tasksOf(CoverageTest))
-    dependsOn(tasksOf(FileCheckTest))
+    dependsOn(tasksOf(FileCheckTest) { task ->
+        // Avoid cross-compilation in a sanity run.
+        task.targetName == project.target.name
+    })
     dependsOn(":kotlin-native:Interop:Indexer:check")
     dependsOn(":kotlin-native:Interop:StubGenerator:check")
 }
@@ -5945,6 +5949,16 @@ fileCheckTest("filecheck_smoke0") {
     annotatedSource = project.file('filecheck/smoke0.kt')
 }
 
+if (HostManager.@Companion.hostIsMac) {
+    fileCheckTest("filecheck_force_arm_instruction_set") {
+        annotatedSource = project.file('filecheck/force_arm_instruction_set.kt')
+        targetName = "watchos_arm32"
+        // Perform check after optimization pipeline because
+        // LLVM might infer attributes.
+        phaseToCheck = "BitcodeOptimization"
+    }
+}
+
 fileCheckTest("filecheck_replace_invoke_with_call") {
     annotatedSource = project.file('filecheck/replace_invoke_with_call.kt')
 }

kotlin-native/backend.native/tests/filecheck/force_arm_instruction_set.kt

@@ -0,0 +1,20 @@
+/*
+ * 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.
+ */
+
+// NB: This is not a good test.
+// What we actually want to check is that Kotlin/Native compiler is able to produce "big"
+// binaries for 32-bit Apple Watch target. The problem is that such test is very-very-very
+// slow to compile (~20 min on a local machine) which is not acceptable for CI.
+//
+// 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{{.+}}"
+
+fun main() {
+    println("hello")
+}
+
+// CHECK-NOT: attributes #{{[0-9]+}} = { {{.+}}+thumb-mode{{.+}} }