Add intrinsic for KCallable.name property Fixes #KT-11531

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -38,13 +38,10 @@ import org.jetbrains.kotlin.codegen.binding.CodegenBinding;
 import org.jetbrains.kotlin.codegen.context.*;
 import org.jetbrains.kotlin.codegen.extensions.ExpressionCodegenExtension;
 import org.jetbrains.kotlin.codegen.inline.*;
-import org.jetbrains.kotlin.codegen.intrinsics.IntrinsicCallable;
-import org.jetbrains.kotlin.codegen.intrinsics.IntrinsicMethod;
-import org.jetbrains.kotlin.codegen.intrinsics.IntrinsicMethods;
-import org.jetbrains.kotlin.codegen.intrinsics.IntrinsicPropertyGetter;
+import org.jetbrains.kotlin.codegen.intrinsics.*;
 import org.jetbrains.kotlin.codegen.pseudoInsns.PseudoInsnsKt;
-import org.jetbrains.kotlin.codegen.signature.JvmSignatureWriter;
 import org.jetbrains.kotlin.codegen.signature.BothSignatureWriter;
+import org.jetbrains.kotlin.codegen.signature.JvmSignatureWriter;
 import org.jetbrains.kotlin.codegen.state.GenerationState;
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper;
 import org.jetbrains.kotlin.codegen.when.SwitchCodegen;
@@ -1983,8 +1980,14 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
                 VariableAsFunctionResolvedCall call = (VariableAsFunctionResolvedCall) resolvedCall;
                 resolvedCall = call.getVariableCall();
             }
-            receiver = StackValue.receiver(resolvedCall, receiver, this, null);
+
             descriptor = resolvedCall.getResultingDescriptor();
+
+            //Check early if KCallableNameProperty is applicable to prevent closure generation
+            StackValue intrinsicResult = applyIntrinsic(descriptor, KCallableNameProperty.class, resolvedCall, receiver);
+            if (intrinsicResult != null) return intrinsicResult;
+
+            receiver = StackValue.receiver(resolvedCall, receiver, this, null);
             if (descriptor instanceof FakeCallableDescriptorForObject) {
                 descriptor = ((FakeCallableDescriptorForObject) descriptor).getReferencedDescriptor();
             }
@@ -1997,17 +2000,9 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
         if (isSyntheticField) {
             descriptor = ((SyntheticFieldDescriptor) descriptor).getPropertyDescriptor();
         }
-        if (descriptor instanceof CallableMemberDescriptor) {
-            CallableMemberDescriptor memberDescriptor = DescriptorUtils.unwrapFakeOverride((CallableMemberDescriptor) descriptor);
 
-            IntrinsicMethod intrinsic = state.getIntrinsics().getIntrinsic(memberDescriptor);
-            if (intrinsic instanceof IntrinsicPropertyGetter) {
-                //TODO: intrinsic properties (see intermediateValueForProperty)
-                Type returnType = typeMapper.mapType(memberDescriptor);
-                StackValue intrinsicResult = ((IntrinsicPropertyGetter) intrinsic).generate(resolvedCall, this, returnType, receiver);
-                if (intrinsicResult != null) return intrinsicResult;
-            }
-        }
+        StackValue intrinsicResult = applyIntrinsic(descriptor, IntrinsicPropertyGetter.class, resolvedCall, receiver);
+        if (intrinsicResult != null) return intrinsicResult;
 
         if (descriptor instanceof PropertyDescriptor) {
             PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
@@ -2056,6 +2051,25 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
         throw new UnsupportedOperationException("don't know how to generate reference " + descriptor);
     }
 
+    @Nullable
+    private StackValue applyIntrinsic(
+            DeclarationDescriptor descriptor,
+            Class<? extends IntrinsicPropertyGetter> intrinsicType,
+            ResolvedCall<?> resolvedCall,
+            @NotNull StackValue receiver
+    ) {
+        if (descriptor instanceof CallableMemberDescriptor) {
+            CallableMemberDescriptor memberDescriptor = DescriptorUtils.unwrapFakeOverride((CallableMemberDescriptor) descriptor);
+            IntrinsicMethod intrinsic = state.getIntrinsics().getIntrinsic(memberDescriptor);
+            if (intrinsicType.isInstance(intrinsic)) {
+                //TODO: intrinsic properties (see intermediateValueForProperty)
+                Type returnType = typeMapper.mapType(memberDescriptor);
+                return ((IntrinsicPropertyGetter) intrinsic).generate(resolvedCall, this, returnType, receiver);
+            }
+        }
+        return null;
+    }
+
     @Nullable
     private ClassDescriptor getSuperCallTarget(@NotNull Call call) {
         KtSuperExpression superExpression = CallResolverUtilKt.getSuperCallExpression(call);

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/IntrinsicMethods.java

@@ -62,6 +62,7 @@ public class IntrinsicMethods {
     public IntrinsicMethods() {
         intrinsicsMap.registerIntrinsic(KOTLIN_JVM, RECEIVER_PARAMETER_FQ_NAME, "javaClass", -1, new JavaClassProperty());
         intrinsicsMap.registerIntrinsic(KOTLIN_JVM, KotlinBuiltIns.FQ_NAMES.kClass, "java", -1, new KClassJavaProperty());
+        intrinsicsMap.registerIntrinsic(KotlinBuiltIns.FQ_NAMES.kCallable.toSafe(), null, "name", -1, new KCallableNameProperty());
         intrinsicsMap.registerIntrinsic(new FqName("kotlin.jvm.internal.unsafe"), null, "monitorEnter", 1, MonitorInstruction.MONITOR_ENTER);
         intrinsicsMap.registerIntrinsic(new FqName("kotlin.jvm.internal.unsafe"), null, "monitorExit", 1, MonitorInstruction.MONITOR_EXIT);
         intrinsicsMap.registerIntrinsic(KOTLIN_JVM, KotlinBuiltIns.FQ_NAMES.array, "isArrayOf", 0, new IsArrayOf());

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/KCallableNameProperty.kt

@@ -0,0 +1,41 @@
+/*
+ * 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.codegen.intrinsics
+
+import org.jetbrains.kotlin.codegen.ExpressionCodegen
+import org.jetbrains.kotlin.codegen.StackValue
+import org.jetbrains.kotlin.psi.KtCallableReferenceExpression
+import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
+import org.jetbrains.org.objectweb.asm.Type
+
+class KCallableNameProperty : IntrinsicPropertyGetter() {
+    override fun generate(resolvedCall: ResolvedCall<*>?, codegen: ExpressionCodegen, returnType: Type, receiver: StackValue): StackValue? {
+        val expressionReceiver = resolvedCall!!.dispatchReceiver as? ExpressionReceiver ?: return null
+        val expression = expressionReceiver.expression as? KtCallableReferenceExpression ?: return null
+        val callableReference = expression.callableReference
+        val descriptor = callableReference.getResolvedCall(codegen.bindingContext)?.resultingDescriptor ?: return null
+        val name = descriptor.name.asString()
+
+        return StackValue.operation(returnType) { iv ->
+            iv.aconst(name)
+            StackValue.coerce(AsmTypes.JAVA_STRING_TYPE, returnType, iv)
+        }
+    }
+}

compiler/testData/codegen/bytecodeListing/callableNameIntrinsic.kt

@@ -0,0 +1,10 @@
+class A {
+    val a = ""
+    fun b() = ""
+
+    fun test() {
+        val a = A::a.name
+        val b = A::b.name
+        val c = ::A.name
+    }
+}

compiler/testData/codegen/bytecodeListing/callableNameIntrinsic.txt

@@ -0,0 +1,8 @@
+@kotlin.Metadata
+public final class A {
+    private final @org.jetbrains.annotations.NotNull field a: java.lang.String
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method b(): java.lang.String
+    public final @org.jetbrains.annotations.NotNull method getA(): java.lang.String
+    public final method test(): void
+}

compiler/tests/org/jetbrains/kotlin/codegen/BytecodeListingTestGenerated.java

@@ -35,6 +35,12 @@ public class BytecodeListingTestGenerated extends AbstractBytecodeListingTest {
         KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/bytecodeListing"), Pattern.compile("^(.+)\\.kt$"), true);
     }
 
+    @TestMetadata("callableNameIntrinsic.kt")
+    public void testCallableNameIntrinsic() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/bytecodeListing/callableNameIntrinsic.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("defaultImpls.kt")
     public void testDefaultImpls() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/bytecodeListing/defaultImpls.kt");