[FIR] provide correct origin and source to default backing field

Now it is aligned with default accessors
Covered by
analysis/analysis-api/testData/symbols/symbolByReference/accessorField.kt
test

^KT-57648
^KT-55723

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedFirMemberDeserializer.kt

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.name.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.hasExpectModifier
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
+import org.jetbrains.kotlin.toKtPsiSourceElement
 
 internal class StubBasedFirDeserializationContext(
     val moduleData: FirModuleData,
@@ -313,12 +314,15 @@ internal class StubBasedFirMemberDeserializer(
                 allAnnotations.filter { it.useSiteTarget == AnnotationUseSiteTarget.FIELD || it.useSiteTarget == AnnotationUseSiteTarget.PROPERTY_DELEGATE_FIELD }
             backingField = FirDefaultPropertyBackingField(
                 c.moduleData,
+                initialOrigin,
+                source = property.toKtPsiSourceElement(KtFakeSourceElementKind.DefaultAccessor),
                 backingFieldAnnotations.toMutableList(),
                 returnTypeRef,
                 isVar,
                 symbol,
-                status
+                status,
             )
+
             if (getter != null) {
                 this.getter = loadPropertyGetter(
                     getter,

compiler/fir/fir-deserialization/src/org/jetbrains/kotlin/fir/deserialization/FirMemberDeserializer.kt

@@ -415,12 +415,15 @@ class FirMemberDeserializer(private val c: FirDeserializationContext) {
                 )
             backingField = FirDefaultPropertyBackingField(
                 c.moduleData,
+                FirDeclarationOrigin.Library,
+                source = null,
                 backingFieldAnnotations,
                 returnTypeRef,
                 isVar,
                 symbol,
-                status
+                status,
             )
+
             if (hasGetter) {
                 this.getter = loadPropertyGetter(
                     proto,

compiler/fir/plugin-utils/src/org/jetbrains/kotlin/fir/plugin/PropertyBuildingContext.kt

@@ -105,9 +105,17 @@ public class PropertyBuildingContext(
             } else {
                 require(setterVisibility == null) { "isVar = false but setterVisibility is specified. Did you forget to set isVar = true?" }
             }
+
             if (hasBackingField) {
                 backingField = FirDefaultPropertyBackingField(
-                    session.moduleData, mutableListOf(), returnTypeRef, isVar, symbol, status,
+                    session.moduleData,
+                    key.origin,
+                    source = null,
+                    mutableListOf(),
+                    returnTypeRef,
+                    isVar,
+                    symbol,
+                    status,
                     resolvePhase = FirResolvePhase.BODY_RESOLVE,
                 )
             }

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/DeclarationsConverter.kt

@@ -1196,7 +1196,8 @@ class DeclarationsConverter(
                 symbol, modifiers, returnType, isVar,
                 if (isLocal) emptyList() else modifiers.annotations.filter {
                     it.useSiteTarget == FIELD || it.useSiteTarget == PROPERTY_DELEGATE_FIELD
-                }
+                },
+                property,
             )
 
             if (isLocal) {
@@ -1481,6 +1482,7 @@ class DeclarationsConverter(
         propertyReturnType: FirTypeRef,
         isVar: Boolean,
         annotationsFromProperty: List<FirAnnotationCall>,
+        property: LighterASTNode,
     ): FirBackingField {
         var modifiers = Modifier()
         var returnType: FirTypeRef = implicitType
@@ -1519,6 +1521,8 @@ class DeclarationsConverter(
         } else {
             FirDefaultPropertyBackingField(
                 moduleData = baseModuleData,
+                origin = FirDeclarationOrigin.Source,
+                source = property.toFirSourceElement(KtFakeSourceElementKind.DefaultAccessor),
                 annotations = annotationsFromProperty.toMutableList(),
                 returnTypeRef = propertyReturnType.copyWithNewSourceKind(KtFakeSourceElementKind.DefaultAccessor),
                 isVar = isVar,

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/fir/ValueParameter.kt

@@ -134,8 +134,12 @@ class ValueParameter(
                 isOverride = modifiers.hasOverride()
                 isConst = modifiers.hasConst()
             }
+
+            val defaultAccessorSource = propertySource?.fakeElement(KtFakeSourceElementKind.DefaultAccessor)
             backingField = FirDefaultPropertyBackingField(
                 moduleData = moduleData,
+                origin = FirDeclarationOrigin.Source,
+                source = defaultAccessorSource,
                 annotations = modifiers.annotations.filter {
                     it.useSiteTarget == FIELD || it.useSiteTarget == PROPERTY_DELEGATE_FIELD
                 }.toMutableList(),
@@ -144,10 +148,11 @@ class ValueParameter(
                 propertySymbol = symbol,
                 status = status.copy(),
             )
+
             annotations += modifiers.annotations.filter {
                 it.useSiteTarget == null || it.useSiteTarget == PROPERTY
             }
-            val defaultAccessorSource = propertySource?.fakeElement(KtFakeSourceElementKind.DefaultAccessor)
+
             getter = FirDefaultPropertyGetter(
                 defaultAccessorSource,
                 moduleData,

compiler/fir/raw-fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt

@@ -567,6 +567,8 @@ open class RawFirBuilder(
             } else {
                 FirDefaultPropertyBackingField(
                     moduleData = baseModuleData,
+                    origin = FirDeclarationOrigin.Source,
+                    source = property.toFirSourceElement(KtFakeSourceElementKind.DefaultAccessor),
                     annotations = annotationsFromProperty.toMutableList(),
                     returnTypeRef = propertyReturnType.copyWithNewSourceKind(KtFakeSourceElementKind.DefaultAccessor),
                     isVar = property.isVar,
@@ -649,8 +651,11 @@ open class RawFirBuilder(
                 isVar = isMutable
                 symbol = FirPropertySymbol(callableIdForName(propertyName))
                 isLocal = false
+                val defaultAccessorSource = propertySource.fakeElement(KtFakeSourceElementKind.DefaultAccessor)
                 backingField = FirDefaultPropertyBackingField(
                     moduleData = baseModuleData,
+                    origin = FirDeclarationOrigin.Source,
+                    source = defaultAccessorSource,
                     annotations = parameterAnnotations.filter {
                         it.useSiteTarget == FIELD || it.useSiteTarget == PROPERTY_DELEGATE_FIELD
                     }.toMutableList(),
@@ -661,7 +666,6 @@ open class RawFirBuilder(
                 )
 
                 this.status = status
-                val defaultAccessorSource = propertySource.fakeElement(KtFakeSourceElementKind.DefaultAccessor)
                 getter = FirDefaultPropertyGetter(
                     defaultAccessorSource,
                     baseModuleData,

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirDefaultPropertyBackingField.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.fir.declarations.impl
 
+import org.jetbrains.kotlin.KtSourceElement
 import org.jetbrains.kotlin.builtins.StandardNames.BACKING_FIELD
 import org.jetbrains.kotlin.fir.FirImplementationDetail
 import org.jetbrains.kotlin.fir.FirModuleData
@@ -20,6 +21,8 @@ import org.jetbrains.kotlin.name.CallableId
 @OptIn(FirImplementationDetail::class)
 class FirDefaultPropertyBackingField(
     moduleData: FirModuleData,
+    origin: FirDeclarationOrigin,
+    source: KtSourceElement?,
     annotations: MutableList<FirAnnotation>,
     returnTypeRef: FirTypeRef,
     isVar: Boolean,
@@ -27,10 +30,10 @@ class FirDefaultPropertyBackingField(
     status: FirDeclarationStatus,
     resolvePhase: FirResolvePhase = FirResolvePhase.RAW_FIR,
 ) : FirBackingFieldImpl(
-    source = null,
+    source = source,
     moduleData = moduleData,
     resolvePhase = resolvePhase,
-    origin = FirDeclarationOrigin.Synthetic,
+    origin = origin,
     attributes = FirDeclarationAttributes(),
     returnTypeRef = returnTypeRef,
     receiverParameter = null,