JVM IR: Fix value class mangling in SAM wrappers from different modules

KT-49659

compiler/ir/backend.jvm/lower/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt

@@ -353,6 +353,7 @@ private val jvmFilePhases = listOf(
     rangeContainsLoweringPhase,
     forLoopsPhase,
     collectionStubMethodLowering,
+    singleAbstractMethodPhase,
     jvmInlineClassPhase,
     tailrecPhase,
     makePatchParentsPhase(1),
@@ -360,7 +361,6 @@ private val jvmFilePhases = listOf(
     enumWhenPhase,
     singletonReferencesPhase,
 
-    singleAbstractMethodPhase,
     assertionPhase,
     returnableBlocksPhase,
     sharedVariablesPhase,

compiler/ir/backend.jvm/lower/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt

@@ -47,7 +47,8 @@ val jvmInlineClassPhase = makeIrFilePhase(
     // forLoopsPhase may produce UInt and ULong which are inline classes.
     // Standard library replacements are done on the unmangled names for UInt and ULong classes.
     // Collection stubs may require mangling by inline class rules.
-    prerequisite = setOf(forLoopsPhase, jvmBuiltInsPhase, collectionStubMethodLowering)
+    // SAM wrappers may require mangling for fun interfaces with inline class parameters
+    prerequisite = setOf(forLoopsPhase, jvmBuiltInsPhase, collectionStubMethodLowering, singleAbstractMethodPhase),
 )
 
 /**

compiler/ir/backend.jvm/lower/src/org/jetbrains/kotlin/backend/jvm/lower/JvmSingleAbstractMethodLowering.kt

@@ -19,7 +19,6 @@ import org.jetbrains.kotlin.ir.builders.declarations.IrFunctionBuilder
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
-import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.IrTypeOperatorCall
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.getClass
@@ -29,7 +28,9 @@ import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 internal val singleAbstractMethodPhase = makeIrFilePhase(
     ::JvmSingleAbstractMethodLowering,
     name = "SingleAbstractMethod",
-    description = "Replace SAM conversions with instances of interface-implementing classes"
+    description = "Replace SAM conversions with instances of interface-implementing classes",
+    // FunctionReferenceLowering produces optimized SAM wrappers.
+    prerequisite = setOf(functionReferencePhase),
 )
 
 private class JvmSingleAbstractMethodLowering(context: JvmBackendContext) : SingleAbstractMethodLowering(context) {

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MemoizedInlineClassReplacements.kt

@@ -54,11 +54,11 @@ class MemoizedInlineClassReplacements(
     val getReplacementFunction: (IrFunction) -> IrSimpleFunction? =
         storageManager.createMemoizedFunctionWithNullableValues {
             when {
-                // Don't mangle anonymous or synthetic functions
+                // Don't mangle anonymous or synthetic functions, except for generated SAM wrapper methods
                 (it.isLocal && it is IrSimpleFunction && it.overriddenSymbols.isEmpty()) ||
                         (it.origin == IrDeclarationOrigin.DELEGATED_PROPERTY_ACCESSOR && it.visibility == DescriptorVisibilities.LOCAL) ||
                         it.isStaticInlineClassReplacement ||
-                        it.origin.isSynthetic ->
+                        it.origin.isSynthetic && it.origin != IrDeclarationOrigin.SYNTHETIC_GENERATED_SAM_IMPLEMENTATION ->
                     null
 
                 it.isInlineClassFieldGetter ->