[JVM IR] Move SYNTHETIC_ACCESSOR origin to IrDeclarationOrigin.Companion

We want to generate synthetic accessors not only on JVM (KT-64865),
so this is one of the prerequisites.

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

@@ -400,7 +400,7 @@ abstract class AnnotationCodegen(
         annotated: IrAnnotationContainer,
         type: IrType?
     ) {
-        if ((annotated as? IrDeclaration)?.origin == JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR ||
+        if ((annotated as? IrDeclaration)?.origin == IrDeclarationOrigin.SYNTHETIC_ACCESSOR ||
             type == null || !context.config.emitJvmTypeAnnotations
         ) {
             return

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

@@ -14,7 +14,6 @@ import org.jetbrains.kotlin.backend.jvm.mapping.mapType
 import org.jetbrains.kotlin.backend.jvm.mapping.mapTypeAsDeclaration
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.inline.*
-import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.codegen.state.JvmBackendConfig
 import org.jetbrains.kotlin.codegen.visitAnnotableParameterCount
 import org.jetbrains.kotlin.config.LanguageFeature
@@ -312,7 +311,7 @@ class FunctionCodegen(private val irFunction: IrFunction, private val classCodeg
                 // Not generating parameter annotations for default stubs fixes KT-7892, though
                 // this certainly looks like a workaround for a javac bug.
                 IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER,
-                JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR,
+                IrDeclarationOrigin.SYNTHETIC_ACCESSOR,
                 IrDeclarationOrigin.GENERATED_SINGLE_FIELD_VALUE_CLASS_MEMBER,
                 IrDeclarationOrigin.BRIDGE,
                 IrDeclarationOrigin.BRIDGE_SPECIAL,

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

@@ -215,7 +215,7 @@ private fun IrSimpleFunction.createMultifileDelegateIfNeeded(
 
     if (DescriptorVisibilities.isPrivate(originalVisibility) ||
         name == StaticInitializersLowering.clinitName ||
-        origin == JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR ||
+        origin == IrDeclarationOrigin.SYNTHETIC_ACCESSOR ||
         origin == JvmLoweredDeclarationOrigin.INLINE_LAMBDA ||
         origin == IrDeclarationOrigin.LOCAL_FUNCTION_FOR_LAMBDA ||
         origin == IrDeclarationOrigin.PROPERTY_DELEGATE ||

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

@@ -147,7 +147,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
 
     private fun IrConstructor.makeConstructorAccessor(
         originForConstructorAccessor: IrDeclarationOrigin =
-            JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+            IrDeclarationOrigin.SYNTHETIC_ACCESSOR
     ): IrConstructor {
         val source = this
 
@@ -158,8 +158,8 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
         }.also { accessor ->
             accessor.parent = source.parent
 
-            accessor.copyTypeParametersFrom(source, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR)
-            accessor.copyValueParametersToStatic(source, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR)
+            accessor.copyTypeParametersFrom(source, IrDeclarationOrigin.SYNTHETIC_ACCESSOR)
+            accessor.copyValueParametersToStatic(source, IrDeclarationOrigin.SYNTHETIC_ACCESSOR)
             if (source.constructedClass.modality == Modality.SEALED) {
                 for (accessorValueParameter in accessor.valueParameters) {
                     accessorValueParameter.annotations = emptyList()
@@ -198,7 +198,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
         return factory.buildFun {
             startOffset = parent.startOffset
             endOffset = parent.startOffset
-            origin = JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+            origin = IrDeclarationOrigin.SYNTHETIC_ACCESSOR
             name = source.accessorName(superQualifierSymbol, scopes)
             visibility = DescriptorVisibilities.PUBLIC
             modality = if (parent is IrClass && parent.isJvmInterface) Modality.OPEN else Modality.FINAL
@@ -206,8 +206,8 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
         }.also { accessor ->
             accessor.parent = parent
             accessor.copyAttributes(source)
-            accessor.copyTypeParametersFrom(source, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR)
-            accessor.copyValueParametersToStatic(source, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR, dispatchReceiverType)
+            accessor.copyTypeParametersFrom(source, IrDeclarationOrigin.SYNTHETIC_ACCESSOR)
+            accessor.copyValueParametersToStatic(source, IrDeclarationOrigin.SYNTHETIC_ACCESSOR, dispatchReceiverType)
             accessor.returnType = source.returnType.remapTypeParameters(source, accessor)
 
             accessor.body = context.irFactory.createExpressionBody(
@@ -246,7 +246,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
         context.irFactory.buildFun {
             startOffset = parent.startOffset
             endOffset = parent.startOffset
-            origin = JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+            origin = IrDeclarationOrigin.SYNTHETIC_ACCESSOR
             name = fieldSymbol.owner.accessorNameForGetter(superQualifierSymbol)
             visibility = DescriptorVisibilities.PUBLIC
             modality = Modality.FINAL
@@ -257,7 +257,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
             if (!fieldSymbol.owner.isStatic) {
                 // Accessors are always to one's own fields.
                 accessor.addValueParameter(
-                    "\$this", parent.defaultType, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+                    "\$this", parent.defaultType, IrDeclarationOrigin.SYNTHETIC_ACCESSOR
                 )
             }
 
@@ -302,7 +302,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
         context.irFactory.buildFun {
             startOffset = parent.startOffset
             endOffset = parent.startOffset
-            origin = JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+            origin = IrDeclarationOrigin.SYNTHETIC_ACCESSOR
             name = fieldSymbol.owner.accessorNameForSetter(superQualifierSymbol)
             visibility = DescriptorVisibilities.PUBLIC
             modality = Modality.FINAL
@@ -313,11 +313,11 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
             if (!fieldSymbol.owner.isStatic) {
                 // Accessors are always to one's own fields.
                 accessor.addValueParameter(
-                    "\$this", parent.defaultType, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR
+                    "\$this", parent.defaultType, IrDeclarationOrigin.SYNTHETIC_ACCESSOR
                 )
             }
 
-            accessor.addValueParameter("<set-?>", fieldSymbol.owner.type, JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR)
+            accessor.addValueParameter("<set-?>", fieldSymbol.owner.type, IrDeclarationOrigin.SYNTHETIC_ACCESSOR)
 
             accessor.body = createAccessorBodyForSetter(fieldSymbol.owner, accessor, superQualifierSymbol)
         }.symbol
@@ -471,7 +471,7 @@ class CachedSyntheticDeclarations(private val context: JvmBackendContext) {
 
     private val IrConstructor.isOrShouldBeHiddenDueToOrigin: Boolean
         get() = !(origin == IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER ||
-                origin == JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR ||
+                origin == IrDeclarationOrigin.SYNTHETIC_ACCESSOR ||
                 origin == JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR_FOR_HIDDEN_CONSTRUCTOR ||
                 origin == IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB)
 

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

@@ -14,7 +14,6 @@ object JvmLoweredDeclarationOrigin {
     val FIELD_FOR_OUTER_THIS by IrDeclarationOriginImpl
     val LAMBDA_IMPL by IrDeclarationOriginImpl
     val FUNCTION_REFERENCE_IMPL by IrDeclarationOriginImpl.Synthetic
-    val SYNTHETIC_ACCESSOR by IrDeclarationOriginImpl.Synthetic
     val SYNTHETIC_ACCESSOR_FOR_HIDDEN_CONSTRUCTOR by IrDeclarationOriginImpl.Synthetic
     val SYNTHETIC_MARKER_PARAMETER by IrDeclarationOriginImpl.Synthetic
     val TO_ARRAY by IrDeclarationOriginImpl

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

@@ -62,7 +62,7 @@ private val BRIDGE_ORIGINS = setOf(
     IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER,
     JvmLoweredDeclarationOrigin.JVM_STATIC_WRAPPER,
     JvmLoweredDeclarationOrigin.JVM_OVERLOADS_WRAPPER,
-    JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR,
+    IrDeclarationOrigin.SYNTHETIC_ACCESSOR,
     JvmLoweredDeclarationOrigin.SYNTHETIC_ACCESSOR_FOR_HIDDEN_CONSTRUCTOR,
     JvmLoweredDeclarationOrigin.SUPER_INTERFACE_METHOD_BRIDGE,
     IrDeclarationOrigin.BRIDGE,

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclarationOrigin.kt

@@ -95,6 +95,12 @@ interface IrDeclarationOrigin {
         val LOWERED_SUSPEND_FUNCTION by IrDeclarationOriginImpl.Synthetic
 
         val SHARED_VARIABLE_IN_EVALUATOR_FRAGMENT by IrDeclarationOriginImpl.Synthetic
+
+        /**
+         * Used on synthetic accessor functions generated in place of references to e.g. private symbols in non-private inline functions,
+         * or `super` calls from lambdas and inline functions.
+         */
+        val SYNTHETIC_ACCESSOR by IrDeclarationOriginImpl.Synthetic
     }
 
     /**