JVM IR: Use INVOKESPECIAL instead of INVOKEVIRTUAL for default private

suspend functions.

 #KT-26592

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -9549,6 +9549,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/coroutines/featureIntersection/interfaceMethodWithBodyGeneric.kt");
             }
 
+            @Test
+            @TestMetadata("jvmDefault.kt")
+            public void testJvmDefault() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/jvmDefault.kt");
+            }
+
             @Test
             @TestMetadata("overrideInInlineClass.kt")
             public void testOverrideInInlineClass() throws Exception {

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt

@@ -403,7 +403,7 @@ class MethodSignatureMapper(private val context: JvmBackendContext) {
             callee.dispatchReceiverParameter == null -> Opcodes.INVOKESTATIC
             isSuperCall -> Opcodes.INVOKESPECIAL
             isInterface && !DescriptorVisibilities.isPrivate(callee.visibility) -> Opcodes.INVOKEINTERFACE
-            DescriptorVisibilities.isPrivate(callee.visibility) && !callee.isSuspend -> Opcodes.INVOKESPECIAL
+            DescriptorVisibilities.isPrivate(callee.visibility) -> Opcodes.INVOKESPECIAL
             else -> Opcodes.INVOKEVIRTUAL
         }
 

compiler/testData/codegen/box/coroutines/featureIntersection/jvmDefault.kt

@@ -0,0 +1,34 @@
+// WITH_RUNTIME
+// !JVM_DEFAULT_MODE: all
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// IGNORE_BACKEND: JVM
+
+import kotlin.coroutines.*
+
+interface Foo {
+    private suspend fun test(): String {
+        return "OK"
+    }
+
+    suspend fun foo(): String {
+        return test()
+    }
+}
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {
+        it.getOrThrow()
+    })
+}
+
+fun box(): String {
+    var res = "FAIL"
+
+    builder {
+        val foo: Foo = object : Foo{}
+        res = foo.foo()
+    }
+
+    return res
+}

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java

@@ -9549,6 +9549,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/coroutines/featureIntersection/interfaceMethodWithBodyGeneric.kt");
             }
 
+            @Test
+            @TestMetadata("jvmDefault.kt")
+            public void testJvmDefault() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/jvmDefault.kt");
+            }
+
             @Test
             @TestMetadata("overrideInInlineClass.kt")
             public void testOverrideInInlineClass() throws Exception {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java

@@ -9549,6 +9549,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/coroutines/featureIntersection/interfaceMethodWithBodyGeneric.kt");
             }
 
+            @Test
+            @TestMetadata("jvmDefault.kt")
+            public void testJvmDefault() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/jvmDefault.kt");
+            }
+
             @Test
             @TestMetadata("overrideInInlineClass.kt")
             public void testOverrideInInlineClass() throws Exception {

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

@@ -7517,6 +7517,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/coroutines/featureIntersection/funInterface.kt");
             }
 
+            @TestMetadata("jvmDefault.kt")
+            public void ignoreJvmDefault() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/jvmDefault.kt");
+            }
+
             private void runTest(String testDataFilePath) throws Exception {
                 KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM, testDataFilePath);
             }