[FIR] Fix overloading of renamed jvm methods

#KT-48102 Fixed

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java

@@ -7495,6 +7495,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/declarationChecks/localVariablesWithTypeParameters_1_4.kt");
             }
 
+            @Test
+            @TestMetadata("mappedFunctionNotImplemented.kt")
+            public void testMappedFunctionNotImplemented() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/declarationChecks/mappedFunctionNotImplemented.kt");
+            }
+
             @Test
             @TestMetadata("mulitpleVarargParameters.kt")
             public void testMulitpleVarargParameters() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java

@@ -7495,6 +7495,12 @@ public class FirOldFrontendDiagnosticsWithLightTreeTestGenerated extends Abstrac
                 runTest("compiler/testData/diagnostics/tests/declarationChecks/localVariablesWithTypeParameters_1_4.kt");
             }
 
+            @Test
+            @TestMetadata("mappedFunctionNotImplemented.kt")
+            public void testMappedFunctionNotImplemented() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/declarationChecks/mappedFunctionNotImplemented.kt");
+            }
+
             @Test
             @TestMetadata("mulitpleVarargParameters.kt")
             public void testMulitpleVarargParameters() throws Exception {

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaClassUseSiteMemberScope.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.synthetic.FirSyntheticProperty
 import org.jetbrains.kotlin.fir.declarations.synthetic.buildSyntheticProperty
 import org.jetbrains.kotlin.fir.declarations.utils.isInterface
+import org.jetbrains.kotlin.fir.declarations.utils.isOperator
 import org.jetbrains.kotlin.fir.declarations.utils.modality
 import org.jetbrains.kotlin.fir.declarations.utils.superConeTypes
 import org.jetbrains.kotlin.fir.java.declarations.FirJavaClass
@@ -299,6 +300,13 @@ class JavaClassUseSiteMemberScope(
     ): FirNamedFunctionSymbol? {
         val overriddenBuiltin = symbol.getOverriddenBuiltinWithDifferentJvmName() ?: return null
 
+        //if (unrelated) method with special name is already defined, we don't add renamed method at all
+        //otherwise  we get methods ambiguity
+        val alreadyDefined = declaredMemberScope.getFunctions(name).any { declaredSymbol ->
+            overrideChecker.isOverriddenFunction(declaredSymbol.fir, symbol.fir)
+        }
+        if (alreadyDefined) return null
+
         val nameInJava =
             SpecialGenericSignatures.SIGNATURE_TO_JVM_REPRESENTATION_NAME[overriddenBuiltin.fir.computeJvmSignature() ?: return null]
                 ?: return null
@@ -308,6 +316,7 @@ class JavaClassUseSiteMemberScope(
             val renamedCopy = buildJavaMethodCopy(candidateFir) {
                 this.name = name
                 this.symbol = FirNamedFunctionSymbol(CallableId(candidateFir.symbol.callableId.classId!!, name))
+                this.status = candidateFir.status.copy(isOperator = symbol.isOperator)
             }.apply {
                 initialSignatureAttr = candidateFir
             }
@@ -415,6 +424,10 @@ class JavaClassUseSiteMemberScope(
     private fun FirNamedFunctionSymbol.getOverriddenBuiltinWithDifferentJvmName(): FirNamedFunctionSymbol? {
         var result: FirNamedFunctionSymbol? = null
 
+        if (SpecialGenericSignatures.SIGNATURE_TO_JVM_REPRESENTATION_NAME.containsKey(this.fir.computeJvmSignature())) {
+            return this
+        }
+
         superTypesScope.processOverriddenFunctions(this) {
             if (!it.isFromBuiltInClass(session)) return@processOverriddenFunctions ProcessorAction.NEXT
             if (SpecialGenericSignatures.SIGNATURE_TO_JVM_REPRESENTATION_NAME.containsKey(it.fir.computeJvmSignature())) {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/CopyUtils.kt

@@ -179,9 +179,10 @@ fun FirDeclarationStatus.copy(
     isExpect: Boolean = this.isExpect,
     newModality: Modality? = null,
     newVisibility: Visibility? = null,
-    newEffectiveVisibility: EffectiveVisibility? = null
+    newEffectiveVisibility: EffectiveVisibility? = null,
+    isOperator: Boolean = this.isOperator
 ): FirDeclarationStatus {
-    return if (this.isExpect == isExpect && newModality == null && newVisibility == null) {
+    return if (this.isExpect == isExpect && newModality == null && newVisibility == null && this.isOperator == isOperator) {
         this
     } else {
         require(this is FirDeclarationStatusImpl) { "Unexpected class ${this::class}" }
@@ -191,6 +192,7 @@ fun FirDeclarationStatus.copy(
             newEffectiveVisibility ?: EffectiveVisibility.Public
         ).apply {
             this.isExpect = isExpect
+            this.isOperator = isOperator
         }
     }
 }