Classes: implement 'new super'.

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index 90df54995f3362a0922f7cb6ff913c5deabe4773..e85722738d3198d41b6b98e038b6230ed273ceea 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -2867,6 +2867,13 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
 }
 
 
+void FullCodeGenerator::EmitLoadSuperConstructor(SuperReference* expr) {
+  DCHECK(super_ref != NULL);
+  __ Push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+  __ CallRuntime(Runtime::kGetPrototype, 1);
+}
+
+
 void FullCodeGenerator::VisitCall(Call* expr) {
 #ifdef DEBUG
   // We want to verify that RecordJSReturnSite gets called on all paths
@@ -2977,8 +2984,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
   } else if (call_type == Call::SUPER_CALL) {
     SuperReference* super_ref = callee->AsSuperReference();
     DCHECK(super_ref != NULL);

[Igor Sheludko, 2014/10/23 07:37:23]

We have this DCHECK inside EmitLoadSuperConstructor().

[Dmitry Lomov (no reviews), 2014/10/23 07:55:19]

Done.

-    __ Push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
-    __ CallRuntime(Runtime::kGetPrototype, 1);
+    EmitLoadSuperConstructor(super_ref);
     __ Push(result_register());
     VisitForStackValue(super_ref->this_var());
     EmitCall(expr, CallICState::METHOD);
@@ -3009,7 +3015,12 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
   // Push constructor on the stack.  If it's not a function it's used as
   // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
   // ignored.
-  VisitForStackValue(expr->expression());
+  if (expr->expression()->IsSuperReference()) {
+    EmitLoadSuperConstructor(expr->expression()->AsSuperReference());
+    __ Push(result_register());
+  } else {
+    VisitForStackValue(expr->expression());
+  }
 
   // Push the arguments ("left-to-right") on the stack.
   ZoneList<Expression*>* args = expr->arguments();