JVM_IR: remove a suspend-related hack from BridgeLowering

`invoke` in suspend lambdas overrides FunctionN.invoke, so the
refactored BridgeLowering already generates correct bridges there.
All the hack does is break overrides of interface suspend methods.

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/BridgeLowering.kt

@@ -463,12 +463,7 @@ private class BridgeLowering(val context: JvmBackendContext) : FileLoweringPass,
 
     private fun IrValueParameter.copyWithTypeErasure(target: IrSimpleFunction, forceBoxing: Boolean = false): IrValueParameter = copyTo(
         target, IrDeclarationOrigin.BRIDGE,
-        type =
-        // SuspendFunction{N} is Function{N+1} at runtime, thus, when we generate a bridge for suspend callable references,
-        // we need to replace the type of its continuation parameter with Any?
-        if (target.isSuspend && type.eraseTypeParameters().getClass()
-                ?.fqNameWhenAvailable == DescriptorUtils.CONTINUATION_INTERFACE_FQ_NAME_RELEASE
-        ) context.irBuiltIns.anyNType else type.eraseTypeParameters().let { if (forceBoxing) it.makeNullable() else it },
+        type = type.eraseTypeParameters().let { if (forceBoxing) it.makeNullable() else it },
         varargElementType = varargElementType?.eraseTypeParameters()
     )
 

compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt

@@ -0,0 +1,23 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_RUNTIME
+// WITH_COROUTINES
+// COMMON_COROUTINES_TEST
+
+import helpers.*
+import COROUTINES_PACKAGE.*
+
+interface I1<A, B> {
+    suspend fun f(a: A, b: B): String
+}
+
+class C<A> : I1<A, String> {
+    override suspend fun f(a: A, b: String): String = b
+}
+
+fun box(): String {
+    var result = "fail"
+    suspend {
+        result = (C<Unit>() as I1<Unit, String>).f(Unit, "OK")
+    }.startCoroutine(EmptyContinuation)
+    return result
+}

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

@@ -6908,6 +6908,16 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_2() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines.experimental");
+            }
+
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_2() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines.experimental");

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

@@ -6908,6 +6908,16 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_2() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines.experimental");
+            }
+
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_2() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines.experimental");

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

@@ -6453,6 +6453,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines");

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

@@ -6453,6 +6453,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines");

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

@@ -5483,6 +5483,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines");

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

@@ -5483,6 +5483,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/coroutines/bridges"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS, true);
             }
 
+            @TestMetadata("interfaceSpecialization.kt")
+            public void testInterfaceSpecialization_1_3() throws Exception {
+                runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/interfaceSpecialization.kt", "kotlin.coroutines");
+            }
+
             @TestMetadata("lambdaWithLongReceiver.kt")
             public void testLambdaWithLongReceiver_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver.kt", "kotlin.coroutines");