Do not generate useless methods inside wrapper for inline class

Fix for test data (inlineFunctionInsideInlineClassesBox.kt) is needed
 to avoid check about "no inline functions".

 This check has two steps: first, names of inline functions from
 the metadata are loaded, then these names are checked that they are
 presented for physical methods in the classfile.

 Because now there are no physical methods in the classfile, we can't pass
 the second check, therefore this fix is needed.

 #KT-24872 Fixed

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

@@ -196,6 +196,10 @@ public class FunctionCodegen {
             return;
         }
 
+        if (!shouldGenerateMethodInsideInlineClass(origin, functionDescriptor, contextKind, containingDeclaration)) {
+            return;
+        }
+
         boolean hasSpecialBridge = hasSpecialBridgeMethod(functionDescriptor);
         JvmMethodGenericSignature jvmSignature = strategy.mapMethodSignature(functionDescriptor, typeMapper, contextKind, hasSpecialBridge);
         Method asmMethod = jvmSignature.getAsmMethod();
@@ -255,7 +259,7 @@ public class FunctionCodegen {
                     origin, functionDescriptor, methodContext, strategy, mv, jvmSignature, asmMethod, flags, staticInCompanionObject
             );
         }
-        else if (shouldDelegateMethodBodyToInlineClass(origin, functionDescriptor, contextKind, containingDeclaration, bindingContext)) {
+        else if (canDelegateMethodBodyToInlineClass(origin, functionDescriptor, contextKind, containingDeclaration)) {
             generateMethodInsideInlineClassWrapper(origin, functionDescriptor, (ClassDescriptor) containingDeclaration, mv, typeMapper);
         }
         else {
@@ -277,12 +281,21 @@ public class FunctionCodegen {
         return v.newMethod(origin, access, name, desc, signature, exceptions);
     }
 
-    private static boolean shouldDelegateMethodBodyToInlineClass(
+    private static boolean shouldGenerateMethodInsideInlineClass(
             @NotNull JvmDeclarationOrigin origin,
             @NotNull FunctionDescriptor functionDescriptor,
             @NotNull OwnerKind contextKind,
-            @NotNull DeclarationDescriptor containingDeclaration,
-            @NotNull BindingContext bindingContext
+            @NotNull DeclarationDescriptor containingDeclaration
+    ) {
+        return !canDelegateMethodBodyToInlineClass(origin, functionDescriptor, contextKind, containingDeclaration) ||
+               !functionDescriptor.getOverriddenDescriptors().isEmpty();
+    }
+
+    private static boolean canDelegateMethodBodyToInlineClass(
+            @NotNull JvmDeclarationOrigin origin,
+            @NotNull FunctionDescriptor functionDescriptor,
+            @NotNull OwnerKind contextKind,
+            @NotNull DeclarationDescriptor containingDeclaration
     ) {
         // special kind / function
         if (contextKind == OwnerKind.ERASED_INLINE_CLASS) return false;

compiler/testData/codegen/boxInline/inlineClasses/inlineFunctionInsideInlineClassesBox.kt

@@ -11,6 +11,8 @@ inline class A(val x: Int) {
     inline fun result(other: A): String = if (other.x == x) "OK" else "fail"
 }
 
+inline fun stub() {}
+
 // FILE: 2.kt
 
 import test.*

compiler/testData/codegen/bytecodeListing/inlineClasses/companionObjectInsideInlineClass.txt

@@ -27,7 +27,6 @@ public final class Foo {
     public method equals(p0: java.lang.Object): boolean
     public final method getX(): int
     public method hashCode(): int
-    public final method inInlineClass(): void
     public method toString(): java.lang.String
     public final method unbox(): int
 }

compiler/testData/codegen/bytecodeListing/inlineClasses/computablePropertiesInsideInlineClass.txt

@@ -14,8 +14,6 @@ public final class Foo {
     private final field x: int
     public method <init>(p0: int): void
     public method equals(p0: java.lang.Object): boolean
-    public final method getAsThis(): int
-    public final method getProp(): int
     public final method getX(): int
     public method hashCode(): int
     public method toString(): java.lang.String

compiler/testData/codegen/bytecodeListing/inlineClasses/shapeOfInlineClassWithPrimitive.txt

@@ -14,12 +14,9 @@ public final static class Foo$Erased {
 public final class Foo {
     private final field l: long
     public method <init>(p0: long): void
-    public final method empty(): void
     public method equals(p0: java.lang.Object): boolean
-    public final method extension(@org.jetbrains.annotations.NotNull p0: java.lang.Object, @org.jetbrains.annotations.NotNull p1: java.lang.String): void
     public final method getL(): long
     public method hashCode(): int
-    public final method param(p0: double): void
     public method toString(): java.lang.String
     public final method unbox(): long
 }

compiler/testData/codegen/bytecodeText/inlineClasses/callMemberMethodsInsideInlineClass.kt

@@ -12,7 +12,7 @@ inline class Foo(val x: Int) {
     }
 }
 
-// 2 INVOKESTATIC Foo\$Erased.empty \(I\)V
-// 2 INVOKESTATIC Foo\$Erased.withParam \(ILjava/lang/String;\)V
-// 2 INVOKESTATIC Foo\$Erased.withInlineClassParam \(II\)V
+// 1 INVOKESTATIC Foo\$Erased.empty \(I\)V
+// 1 INVOKESTATIC Foo\$Erased.withParam \(ILjava/lang/String;\)V
+// 1 INVOKESTATIC Foo\$Erased.withInlineClassParam \(II\)V
 // 5 INVOKEVIRTUAL

compiler/testData/codegen/bytecodeText/inlineClasses/noActualCallsOfInlineFunctionsOfInlineClass.kt

@@ -1,7 +1,7 @@
 // !LANGUAGE: +InlineClasses
 
 inline class Foo(val x: Int) {
-    inline fun inlineInc(): Foo = Foo(x + 1) // one actual call inside wrapper class Foo
+    inline fun inlineInc(): Foo = Foo(x + 1)
     fun notInlineInc(): Foo = Foo(x + 1)
 
     fun foo() {
@@ -11,8 +11,8 @@ inline class Foo(val x: Int) {
 
 fun test(f: Foo) {
     f.inlineInc().inlineInc().inlineInc()
-    f.notInlineInc() // one here, one inside wrapper class Foo
+    f.notInlineInc() // one here
 }
 
-// 1 INVOKESTATIC Foo\$Erased.inlineInc
-// 2 INVOKESTATIC Foo\$Erased.notInlineInc
+// 0 INVOKESTATIC Foo\$Erased.inlineInc
+// 1 INVOKESTATIC Foo\$Erased.notInlineInc