Separately process inline function default impl body compilation (non general inline magic),

Fix for KT-10670 Debugger: Evaluate Expression/Watches fail for inline function parameter initialized with default value

 #KT-10670 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/InlineCodegen.java

@@ -86,7 +86,7 @@ public class InlineCodegen extends CallGenerator {
 
     private final ReifiedTypeInliner reifiedTypeInliner;
     @Nullable private final TypeParameterMappings typeParameterMappings;
-    private final boolean isDefaultCompilation;
+    private final boolean isDefaultMethodCompilation;
 
     private LambdaInfo activeLambda;
 
@@ -98,11 +98,11 @@ public class InlineCodegen extends CallGenerator {
             @NotNull FunctionDescriptor function,
             @NotNull KtElement callElement,
             @Nullable TypeParameterMappings typeParameterMappings,
-            boolean isDefaultCompilation
+            boolean isDefaultMethodCompilation
     ) {
         assert InlineUtil.isInline(function) || InlineUtil.isArrayConstructorWithLambda(function) :
                 "InlineCodegen can inline only inline functions and array constructors: " + function;
-        this.isDefaultCompilation = isDefaultCompilation;
+        this.isDefaultMethodCompilation = isDefaultMethodCompilation;
         this.state = state;
         this.typeMapper = state.getTypeMapper();
         this.codegen = codegen;
@@ -148,7 +148,11 @@ public class InlineCodegen extends CallGenerator {
 
         try {
             nodeAndSmap = createMethodNode(callDefault);
-            endCall(inlineCall(nodeAndSmap));
+            if (isDefaultMethodCompilation) {
+                nodeAndSmap.getNode().accept(new MethodBodyVisitor(codegen.v));
+            } else {
+                endCall(inlineCall(nodeAndSmap));
+            }
         }
         catch (CompilationException e) {
             throw e;
@@ -277,7 +281,7 @@ public class InlineCodegen extends CallGenerator {
 
         InliningContext info = new RootInliningContext(
                 expressionMap, state, codegen.getInlineNameGenerator().subGenerator(jvmSignature.getAsmMethod().getName()),
-                codegen.getContext(), callElement, getInlineCallSiteInfo(), reifiedTypeInliner, typeParameterMappings, isDefaultCompilation,
+                codegen.getContext(), callElement, getInlineCallSiteInfo(), reifiedTypeInliner, typeParameterMappings,
                 AnnotationUtilKt.hasInlineOnlyAnnotation(functionDescriptor)
         );
 
@@ -678,6 +682,11 @@ public class InlineCodegen extends CallGenerator {
             @NotNull Type parameterType,
             @NotNull StackValue value
     ) {
+        if (isDefaultMethodCompilation) {
+            //original method would be inlined directly into default impl body without any inline magic
+            //so we no need to load variables on stack to further method call
+            return;
+        }
         putValueIfNeeded(parameterType, value, -1);
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/MethodInliner.java

@@ -288,8 +288,7 @@ public class MethodInliner {
                         super.visitMethodInsn(opcode, changeOwnerForExternalPackage(owner, opcode), name, desc, itf);
                     }
                 }
-                else if (ReifiedTypeInliner.isNeedClassReificationMarker(new MethodInsnNode(opcode, owner, name, desc, false)) &&
-                         !isDefaultCompilation()) {
+                else if (ReifiedTypeInliner.isNeedClassReificationMarker(new MethodInsnNode(opcode, owner, name, desc, false))) {
                     // we will put it if needed in anew processing
                 }
                 else {
@@ -378,7 +377,6 @@ public class MethodInliner {
             ) {
                 if (isInliningLambda || GENERATE_DEBUG_INFO) {
                     String varSuffix = inliningContext.isRoot() &&
-                                       !isDefaultCompilation() &&
                                        !InlineCodegenUtil.isFakeLocalVariableForInline(name) ?
                                        INLINE_FUN_VAR_SUFFIX : "";
                     String varName = !varSuffix.isEmpty() && name.equals("this") ? name + "_" : name;
@@ -446,7 +444,7 @@ public class MethodInliner {
 
             if (frame != null) {
                 if (ReifiedTypeInliner.isNeedClassReificationMarker(cur)) {
-                    awaitClassReification = !isDefaultCompilation();
+                    awaitClassReification = true;
                 }
                 else if (cur.getType() == AbstractInsnNode.METHOD_INSN) {
                     if (InlineCodegenUtil.isFinallyStart(cur)) {
@@ -809,8 +807,4 @@ public class MethodInliner {
         }
 
     }
-
-    private boolean isDefaultCompilation() {
-        return inliningContext.isRoot() && ((RootInliningContext) inliningContext).isDefaultCompilation;
-    }
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/RootInliningContext.java

@@ -28,7 +28,6 @@ public class RootInliningContext extends InliningContext {
     public final CodegenContext startContext;
     private final InlineCallSiteInfo inlineCallSiteInfo;
     public final TypeParameterMappings typeParameterMappings;
-    public final boolean isDefaultCompilation;
     public final boolean skipSmap;
     public final KtElement callElement;
 
@@ -41,7 +40,6 @@ public class RootInliningContext extends InliningContext {
             @NotNull InlineCallSiteInfo classNameToInline,
             @NotNull ReifiedTypeInliner inliner,
             @Nullable TypeParameterMappings typeParameterMappings,
-            boolean isDefaultCompilation,
             boolean skipSmap
     ) {
         super(null, map, state, nameGenerator, TypeRemapper.createRoot(typeParameterMappings), inliner, false, false);
@@ -49,7 +47,6 @@ public class RootInliningContext extends InliningContext {
         this.startContext = startContext;
         this.inlineCallSiteInfo = classNameToInline;
         this.typeParameterMappings = typeParameterMappings;
-        this.isDefaultCompilation = isDefaultCompilation;
         this.skipSmap = skipSmap;
     }