IC Mangling: Generate inline class literal instead of underlying type

literal in annotations.
 #KT-30280 Fixed

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

@@ -33,6 +33,7 @@ import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.resolve.AnnotationChecker;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
+import org.jetbrains.kotlin.resolve.InlineClassesUtilsKt;
 import org.jetbrains.kotlin.resolve.checkers.ExpectedActualDeclarationChecker;
 import org.jetbrains.kotlin.resolve.constants.*;
 import org.jetbrains.kotlin.resolve.descriptorUtil.DescriptorUtilsKt;
@@ -497,6 +498,9 @@ public abstract class AnnotationCodegen {
             public Void visitKClassValue(KClassValue value, Void data) {
                 KotlinType classType = value.getArgumentType(module);
                 innerClassConsumer.addInnerClassInfoFromAnnotation(DescriptorUtils.getClassDescriptorForType(classType));
+                if (InlineClassesUtilsKt.isInlineClassType(classType)) {
+                    classType = TypeUtils.makeNullable(classType);
+                }
                 annotationVisitor.visit(name, typeMapper.mapType(classType));
                 return null;
             }

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

@@ -13987,6 +13987,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/inlineClasses/jvmStaticVarInInlineClassCompanion.kt");
         }
 
+        @TestMetadata("kclassInAnnotation.kt")
+        public void testKclassInAnnotation() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kclassInAnnotation.kt");
+        }
+
         @TestMetadata("kt25246.kt")
         public void testKt25246() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/kt25246.kt");

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/AnnotationCodegen.kt

@@ -272,8 +272,11 @@ abstract class AnnotationCodegen(
                 visitor.visitEnd()
             }
             is IrClassReference -> {
-                val classType = value.classType
+                var classType = value.classType
                 classType.classOrNull?.owner?.let(innerClassConsumer::addInnerClassInfoFromAnnotation)
+                if (classType.isInlined()) {
+                    classType = classType.makeNullable()
+                }
                 annotationVisitor.visit(name, typeMapper.mapType(classType))
             }
             is IrErrorExpression -> error("Don't know how to compile annotation value ${ir2string(value)}")

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

@@ -0,0 +1,16 @@
+// WITH_REFLECT
+// TARGET_BACKEND: JVM
+
+import kotlin.reflect.KClass
+
+inline class IC(val i: Int)
+
+annotation class Ann(val c: KClass<*>)
+
+@Ann(IC::class)
+class C
+
+fun box(): String {
+    val klass = (C::class.annotations.first() as Ann).c.toString()
+    return if (klass == "class IC") "OK" else klass
+}

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

@@ -13987,6 +13987,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/inlineClasses/jvmStaticVarInInlineClassCompanion.kt");
         }
 
+        @TestMetadata("kclassInAnnotation.kt")
+        public void testKclassInAnnotation() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kclassInAnnotation.kt");
+        }
+
         @TestMetadata("kt25246.kt")
         public void testKt25246() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/kt25246.kt");

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

@@ -13997,6 +13997,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/inlineClasses/jvmStaticVarInInlineClassCompanion.kt");
         }
 
+        @TestMetadata("kclassInAnnotation.kt")
+        public void testKclassInAnnotation() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kclassInAnnotation.kt");
+        }
+
         @TestMetadata("kt25246.kt")
         public void testKt25246() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/kt25246.kt");

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

@@ -13987,6 +13987,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/inlineClasses/jvmStaticVarInInlineClassCompanion.kt");
         }
 
+        @TestMetadata("kclassInAnnotation.kt")
+        public void testKclassInAnnotation() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kclassInAnnotation.kt");
+        }
+
         @TestMetadata("kt25246.kt")
         public void testKt25246() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/kt25246.kt");