Generate correct $default method for actual suspend function

In order to do this, we need to get initial expect suspend function
before generating default value parameters checks.
 #KT-43587 Fixed

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

@@ -1221,7 +1221,12 @@ public class FunctionCodegen {
 
         // 'null' because the "could not find expected declaration" error has been already reported in isDefaultNeeded earlier
         List<ValueParameterDescriptor> valueParameters =
-                CodegenUtil.getFunctionParametersForDefaultValueGeneration(functionDescriptor, null);
+                functionDescriptor.isSuspend()
+                ? CollectionsKt.plus(
+                    CodegenUtil.getFunctionParametersForDefaultValueGeneration(
+                            CoroutineCodegenUtilKt.unwrapInitialDescriptorForSuspendFunction(functionDescriptor), null),
+                    CollectionsKt.last(functionDescriptor.getValueParameters()))
+                : CodegenUtil.getFunctionParametersForDefaultValueGeneration(functionDescriptor, null);
 
         boolean isStatic = isStaticMethod(methodContext.getContextKind(), functionDescriptor);
         FrameMap frameMap = createFrameMap(state, signature, functionDescriptor.getExtensionReceiverParameter(), valueParameters, isStatic);

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

@@ -7356,6 +7356,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines");

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

@@ -0,0 +1,25 @@
+// !LANGUAGE: +MultiPlatformProjects
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+// IGNORE_BACKEND_FIR: JVM_IR
+
+import kotlin.coroutines.*
+
+var res = 0L
+
+expect suspend fun withLimit(limit: Long = 42L)
+
+actual suspend fun withLimit(limit: Long) {
+    res = limit
+}
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {})
+}
+
+fun box(): String {
+    builder {
+        withLimit()
+    }
+    return if (res == 42L) "OK" else "FAIL $res"
+}

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

@@ -7951,6 +7951,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_2() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines.experimental");

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

@@ -7956,6 +7956,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_2() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines.experimental");

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

@@ -7356,6 +7356,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -6121,6 +6121,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines");

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

@@ -6121,6 +6121,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines");

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

@@ -6121,6 +6121,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/breakWithNonEmptyStack.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("defaultExpect.kt")
+            public void testDefaultExpect() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/featureIntersection/defaultExpect.kt");
+            }
+
             @TestMetadata("delegate.kt")
             public void testDelegate_1_3() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/featureIntersection/delegate.kt", "kotlin.coroutines");