Computed property names for class literals in TurboFan.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 3acb57acb25b3072767584a3499d13ffcec299dd..8443cfafac50cf6aff02651acfb4aa55e51fc24e 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -897,6 +897,7 @@ void AstGraphBuilder::VisitClassLiteralContents(ClassLiteral* expr) {
     environment()->Push(property->is_static() ? literal : proto);
 
     VisitForValue(property->key());
+    environment()->Push(BuildToName(environment()->Pop()));
     VisitForValue(property->value());
     Node* value = environment()->Pop();
     Node* key = environment()->Pop();
@@ -2232,7 +2233,7 @@ Node* AstGraphBuilder::BuildLoadGlobalProxy() {
 
 
 Node* AstGraphBuilder::BuildToBoolean(Node* input) {
-  // TODO(titzer): this should be in a JSOperatorReducer.
+  // TODO(titzer): This should be in a JSOperatorReducer.
   switch (input->opcode()) {
     case IrOpcode::kInt32Constant:
       return jsgraph_->BooleanConstant(!Int32Matcher(input).Is(0));
@@ -2256,6 +2257,14 @@ Node* AstGraphBuilder::BuildToBoolean(Node* input) {
 }
 
 
+Node* AstGraphBuilder::BuildToName(Node* input) {
+  // TODO(turbofan): Possible optimization is to NOP on name constants. But the
+  // same caveat as with BuildToBoolean applies, and it should be factored out
+  // into a JSOperatorReducer.
+  return NewNode(javascript()->ToName(), input);
+}
+
+
 Node* AstGraphBuilder::BuildThrowReferenceError(Variable* variable,
                                                 BailoutId bailout_id) {
   // TODO(mstarzinger): Should be unified with the VisitThrow implementation.