JVM IR: do not generate extension receiver parameter as ACC_MANDATED

Otherwise Java reflection is not able to load its type as a
parameterized type.

 #KT-40857 Fixed

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

@@ -34887,6 +34887,12 @@ public class FirLightTreeBlackBoxCodegenTestGenerated extends AbstractFirLightTr
             runTest("compiler/testData/codegen/box/parametersMetadata/jvmOverloads.kt");
         }
 
+        @Test
+        @TestMetadata("kt40857_parameterizedExtensionReceiver.kt")
+        public void testKt40857_parameterizedExtensionReceiver() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt");
+        }
+
         @Test
         @TestMetadata("superParams.kt")
         public void testSuperParams() throws Exception {

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

@@ -34887,6 +34887,12 @@ public class FirPsiBlackBoxCodegenTestGenerated extends AbstractFirPsiBlackBoxCo
             runTest("compiler/testData/codegen/box/parametersMetadata/jvmOverloads.kt");
         }
 
+        @Test
+        @TestMetadata("kt40857_parameterizedExtensionReceiver.kt")
+        public void testKt40857_parameterizedExtensionReceiver() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt");
+        }
+
         @Test
         @TestMetadata("superParams.kt")
         public void testSuperParams() throws Exception {

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

@@ -337,7 +337,7 @@ private fun IrValueParameter.isSyntheticMarkerParameter(): Boolean =
 
 private fun generateParameterNames(irFunction: IrFunction, mv: MethodVisitor, state: GenerationState) {
     irFunction.extensionReceiverParameter?.let {
-        mv.visitParameter(irFunction.extensionReceiverName(state), Opcodes.ACC_MANDATED)
+        mv.visitParameter(irFunction.extensionReceiverName(state), 0)
     }
     for (irParameter in irFunction.valueParameters) {
         // A construct emitted by a Java compiler must be marked as synthetic if it does not correspond to a construct declared

compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt

@@ -1,5 +1,6 @@
 // SKIP_JDK6
 // TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
 // WITH_STDLIB
 // FULL_JDK
 // PARAMETERS_METADATA
@@ -15,7 +16,7 @@ fun box(): String {
     val method = clazz.getDeclaredMethod("test", String::class.java, String::class.java)
     val parameters = method.getParameters()
 
-    if (!parameters[0].isImplicit() || parameters[0].isSynthetic()) return "wrong modifier on receiver parameter: ${parameters[0].modifiers}"
+    if (parameters[0].isImplicit() || parameters[0].isSynthetic()) return "wrong modifier on receiver parameter: ${parameters[0].modifiers}"
 
     return parameters[1].name
 }

compiler/testData/codegen/box/parametersMetadata/inlineClassMethodParameterModifiers.kt

@@ -1,5 +1,6 @@
 // SKIP_JDK6
 // TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
 // WITH_STDLIB
 // FULL_JDK
 // PARAMETERS_METADATA
@@ -19,10 +20,8 @@ fun box(): String {
 
     val extensionMethod = Class.forName("AKt").declaredMethods.single { it.name.contains("extension") }
     val extensionMethodParameters = extensionMethod.getParameters()
-    if (extensionMethodParameters[0].isSynthetic())
+    if (extensionMethodParameters[0].isSynthetic() || extensionMethodParameters[0].isImplicit())
-        return "wrong modifier (synthetic) on extension receiver parameter: ${extensionMethodParameters[0].modifiers}"
+        return "wrong modifier on extension receiver parameter: ${extensionMethodParameters[0].modifiers}"
-    if (!extensionMethodParameters[0].isImplicit())
-        return "wrong modifier (not implicit) on extension receiver parameter: ${extensionMethodParameters[0].modifiers}"
 
     return "OK"
 }

compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt

@@ -0,0 +1,17 @@
+// SKIP_JDK6
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
+// WITH_STDLIB
+// FULL_JDK
+// PARAMETERS_METADATA
+
+import java.lang.reflect.ParameterizedType
+
+fun List<String>.bar(i: Int) = Unit
+
+fun box(): String {
+    val function = object {}.javaClass.enclosingClass.getDeclaredMethods().single { it.name == "bar" }
+    val type = function.parameters[0].parameterizedType
+    if (type !is ParameterizedType || type.toString() != "java.util.List<java.lang.String>") return "Fail: $type ${type.javaClass}"
+    return "OK"
+}

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

@@ -33483,6 +33483,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/parametersMetadata/jvmOverloads.kt");
         }
 
+        @Test
+        @TestMetadata("kt40857_parameterizedExtensionReceiver.kt")
+        public void testKt40857_parameterizedExtensionReceiver() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt");
+        }
+
         @Test
         @TestMetadata("superParams.kt")
         public void testSuperParams() throws Exception {

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

@@ -34887,6 +34887,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/parametersMetadata/jvmOverloads.kt");
         }
 
+        @Test
+        @TestMetadata("kt40857_parameterizedExtensionReceiver.kt")
+        public void testKt40857_parameterizedExtensionReceiver() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt");
+        }
+
         @Test
         @TestMetadata("superParams.kt")
         public void testSuperParams() throws Exception {

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

@@ -28509,11 +28509,26 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
     public static class ParametersMetadata extends AbstractLightAnalysisModeTest {
+        @TestMetadata("extensionFunction.kt")
+        public void ignoreExtensionFunction() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt");
+        }
+
+        @TestMetadata("inlineClassMethodParameterModifiers.kt")
+        public void ignoreInlineClassMethodParameterModifiers() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/inlineClassMethodParameterModifiers.kt");
+        }
+
         @TestMetadata("jvmOverloads.kt")
         public void ignoreJvmOverloads() throws Exception {
             runTest("compiler/testData/codegen/box/parametersMetadata/jvmOverloads.kt");
         }
 
+        @TestMetadata("kt40857_parameterizedExtensionReceiver.kt")
+        public void ignoreKt40857_parameterizedExtensionReceiver() throws Exception {
+            runTest("compiler/testData/codegen/box/parametersMetadata/kt40857_parameterizedExtensionReceiver.kt");
+        }
+
         private void runTest(String testDataFilePath) throws Exception {
             KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM, testDataFilePath);
         }
@@ -28537,21 +28552,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/parametersMetadata/enum.kt");
         }
 
-        @TestMetadata("extensionFunction.kt")
-        public void testExtensionFunction() throws Exception {
-            runTest("compiler/testData/codegen/box/parametersMetadata/extensionFunction.kt");
-        }
-
         @TestMetadata("function.kt")
         public void testFunction() throws Exception {
             runTest("compiler/testData/codegen/box/parametersMetadata/function.kt");
         }
 
-        @TestMetadata("inlineClassMethodParameterModifiers.kt")
-        public void testInlineClassMethodParameterModifiers() throws Exception {
-            runTest("compiler/testData/codegen/box/parametersMetadata/inlineClassMethodParameterModifiers.kt");
-        }
-
         @TestMetadata("inlineClassMethodParameterNames.kt")
         public void testInlineClassMethodParameterNames() throws Exception {
             runTest("compiler/testData/codegen/box/parametersMetadata/inlineClassMethodParameterNames.kt");