Old JVM: support init blocks in inline classes

#KT-28055 Fixed

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

@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.psi.*;
 import org.jetbrains.kotlin.resolve.BindingContext;
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
+import org.jetbrains.kotlin.resolve.InlineClassesUtilsKt;
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
 import org.jetbrains.kotlin.resolve.jvm.InlineClassManglingRulesKt;
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin;
@@ -192,6 +193,7 @@ public class ConstructorCodegen {
         markLineNumberForConstructor(constructorDescriptor, primaryConstructor, codegen);
 
         if (OwnerKind.ERASED_INLINE_CLASS == kind) {
+            memberCodegen.generateInitializers(() -> codegen);
             Type t = typeMapper.mapType(constructorDescriptor.getContainingDeclaration());
             iv.load(0, t);
             iv.areturn(t);
@@ -226,7 +228,7 @@ public class ConstructorCodegen {
         }
 
         //object initialization was moved to initializeObjects()
-        if (!isObject(descriptor)) {
+        if (!isObject(descriptor) && !InlineClassesUtilsKt.isInlineClass(descriptor)) {
             memberCodegen.generateInitializers(() -> codegen);
         }
         iv.visitInsn(RETURN);

compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt

@@ -1,6 +1,4 @@
-// IGNORE_BACKEND: JVM
 // IGNORE_BACKEND: JS_IR
-// IGNORE_LIGHT_ANALYSIS
 
 inline class IC(val i: Int) {
     init {

compiler/testData/codegen/box/inlineClasses/initBlock.kt

@@ -1,6 +1,4 @@
-// IGNORE_BACKEND: JVM
 // IGNORE_BACKEND: JS_IR
-// IGNORE_LIGHT_ANALYSIS
 
 inline class SingleInitBlock(val s: String) {
     init {

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

@@ -13,8 +13,18 @@ inline class UInt(val a: Int) {
 
 fun takeNullable(a: UInt?) {}
 
-// 2 INVOKESTATIC UInt\.box
-// 0 INVOKEVIRTUAL Foo.unbox
-
 // 1 valueOf
 // 0 intValue
+
+// JVM_TEMPLATES:
+// 2 INVOKESTATIC UInt\.box
+// -- equals-impl
+// 1 INVOKEVIRTUAL UInt\.unbox
+
+// JVM_IR_TEMPLATES:
+// -- 1 before takeNullable
+// -- 1 before takeAnyInside
+// -- 1 before takeAnyInside's GETFIELD
+// 3 INVOKESTATIC UInt\.box
+// -- getA, toString, hashCode, equals-impl, equals
+// 5 INVOKEVIRTUAL UInt\.unbox