JVM_IR. Align synthetic parameter name generation across backends

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

@@ -278,6 +278,7 @@ class ExpressionCodegen(
     }
 
     private fun writeParameterInLocalVariableTable(startLabel: Label, endLabel: Label) {
+        if (irFunction.origin == IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER) return
         if (!irFunction.isStatic) {
             mv.visitLocalVariable("this", classCodegen.type.descriptor, null, startLabel, endLabel, 0)
         }
@@ -286,9 +287,7 @@ class ExpressionCodegen(
             writeValueParameterInLocalVariableTable(extensionReceiverParameter, startLabel, endLabel, true)
         }
         for (param in irFunction.valueParameters) {
-            if (!param.origin.isSynthetic) {
-                writeValueParameterInLocalVariableTable(param, startLabel, endLabel, false)
-            }
+            writeValueParameterInLocalVariableTable(param, startLabel, endLabel, false)
         }
     }
 

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

@@ -7,6 +7,8 @@ package org.jetbrains.kotlin.backend.jvm.lower
 
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.IrElementTransformerVoidWithContext
+import org.jetbrains.kotlin.backend.common.descriptors.synthesizedName
+import org.jetbrains.kotlin.backend.common.descriptors.synthesizedString
 import org.jetbrains.kotlin.backend.common.ir.*
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
@@ -177,7 +179,7 @@ internal class SyntheticAccessorLowering(val context: JvmBackendContext) : IrEle
             accessor.returnType = source.returnType.remapTypeParameters(source, accessor)
 
             accessor.addValueParameter(
-                "marker", context.ir.symbols.defaultConstructorMarker.defaultType, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+                "constructor_marker".synthesizedString, context.ir.symbols.defaultConstructorMarker.defaultType, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
             )
 
             accessor.body = IrExpressionBodyImpl(

compiler/testData/codegen/bytecodeText/defaultArguments/noSyntheticParameters.kt

@@ -3,13 +3,6 @@
 fun foo(param: String = "123") {}
 
 
-//TODO: align backends
-
-// JVM_TEMPLATES
 // 1 LOCALVARIABLE param
 // 1 LOCALVARIABLE
 
-// JVM_IR_TEMPLATES
-// 2 LOCALVARIABLE param
-// 2 LOCALVARIABLE
-