Optimize signature propagation

Do not collect super function with trivial signature

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/kotlinSignature/SignaturesPropagationData.java

@@ -72,7 +72,9 @@ public class SignaturesPropagationData {
                 createAutoMethodDescriptor(containingClass, method, autoReturnType, autoValueParameters, autoTypeParameters);
 
         superFunctions = getSuperFunctionsForMethod(method, autoMethodDescriptor, containingClass);
-        modifiedValueParameters = modifyValueParametersAccordingToSuperMethods(autoValueParameters);
+        modifiedValueParameters = superFunctions.isEmpty()
+                                  ? new ValueParameters(null, autoValueParameters, /* stableParameterNames = */false)
+                                  : modifyValueParametersAccordingToSuperMethods(autoValueParameters);
     }
 
     @NotNull
@@ -198,9 +200,18 @@ public class SignaturesPropagationData {
 
         // TODO: Add propagation for other kotlin descriptors (KT-3621)
         Name name = method.getName();
-        Method autoSignature = SIGNATURE_MAPPER.mapToJvmMethodSignature(autoMethodDescriptor);
+        Method autoSignature = null;
+        boolean autoMethodContainsVararg = SignaturePropagationUtilKt.containsVarargs(autoMethodDescriptor);
         for (KotlinType supertype : containingClass.getTypeConstructor().getSupertypes()) {
-            Collection<FunctionDescriptor> superFunctionCandidates = supertype.getMemberScope().getContributedFunctions(name, NoLookupLocation.WHEN_GET_SUPER_MEMBERS);
+            Collection<FunctionDescriptor> superFunctionCandidates =
+                    supertype.getMemberScope().getContributedFunctions(name, NoLookupLocation.WHEN_GET_SUPER_MEMBERS);
+
+            if (!autoMethodContainsVararg && !SignaturePropagationUtilKt.containsAnyNotTrivialSignature(superFunctionCandidates)) continue;
+
+            if (autoSignature == null) {
+                autoSignature = SIGNATURE_MAPPER.mapToJvmMethodSignature(autoMethodDescriptor);
+            }
+
             for (FunctionDescriptor candidate : superFunctionCandidates) {
                 Method candidateSignature = SIGNATURE_MAPPER.mapToJvmMethodSignature(candidate);
                 if (KotlinToJvmSignatureMapperKt.erasedSignaturesEqualIgnoringReturnTypes(autoSignature, candidateSignature)) {

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/kotlinSignature/signaturePropagationUtil.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.resolve.jvm.kotlinSignature
+
+import org.jetbrains.kotlin.descriptors.FunctionDescriptor
+
+internal fun FunctionDescriptor.containsVarargs() = valueParameters.any { it.varargElementType != null }
+
+internal fun Collection<FunctionDescriptor>.containsAnyNotTrivialSignature() = any { it.hasNotTrivialSignature() }
+
+private fun FunctionDescriptor.hasNotTrivialSignature(): Boolean {
+    if (extensionReceiverParameter != null) return true
+    if (hasStableParameterNames()) return true
+
+    return containsVarargs()
+}