Load the global proxy from the context of the target function.

src/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7712 matching lines @@
         // Push the global object instead of the global receiver because
         // code generated by the full code generator expects it.
         HGlobalObject* global_object = Add<HGlobalObject>();
         Push(global_object);
         CHECK_ALIVE(VisitExpressions(expr->arguments()));
 
         CHECK_ALIVE(VisitForValue(expr->expression()));
         HValue* function = Pop();
         Add<HCheckValue>(function, expr->target());
 
-        // Replace the global object with the global receiver.
-        HGlobalReceiver* global_receiver = Add<HGlobalReceiver>(global_object);
-        // Index of the receiver from the top of the expression stack.
+        // Install global receiver on stack.
+        Handle<JSObject> global_receiver(
+            expr->target()->context()->global_object()->global_receiver());

[Toon Verwaest, 2013/12/18 13:09:33]

context()->global_proxy()

Weren't you planning on extracting this to a separate method?

         const int receiver_index = argument_count - 1;
-        ASSERT(environment()->ExpressionStackAt(receiver_index)->
-               IsGlobalObject());
-        environment()->SetExpressionStackAt(receiver_index, global_receiver);
+        HConstant* global_receiver_constant = Add<HConstant>(global_receiver);
+        environment()->SetExpressionStackAt(
+            receiver_index, global_receiver_constant);
 
         if (TryInlineBuiltinFunctionCall(expr, false)) {  // Nothing to drop.
           if (FLAG_trace_inlining) {
             PrintF("Inlining builtin ");
             expr->target()->ShortPrint();
             PrintF("\n");
           }
           return;
         }
         if (TryInlineCall(expr)) return;
 
         if (expr->target().is_identical_to(current_info()->closure())) {
           graph()->MarkRecursive();
         }
 
         if (CallStubCompiler::HasCustomCallGenerator(expr->target())) {
+          // We're about to install a contextual IC, which expects the global
+          // object as receiver rather than the global proxy.
+          environment()->SetExpressionStackAt(receiver_index, global_object);
           // When the target has a custom call IC generator, use the IC,
           // because it is likely to generate better code.
-          call = PreProcessCall(New<HCallNamed>(var->name(), argument_count));
+          call = PreProcessCall(New<HCallGlobal>(var->name(), argument_count));
         } else {
           call = PreProcessCall(New<HCallKnownGlobal>(
               expr->target(), argument_count));
         }
       } else {
         HGlobalObject* receiver = Add<HGlobalObject>();
         Push(Add<HPushArgument>(receiver));
         CHECK_ALIVE(VisitArgumentList(expr->arguments()));
 
         call = New<HCallGlobal>(var->name(), argument_count);
         Drop(argument_count);
       }
 
     } else if (expr->IsMonomorphic()) {
       // The function is on the stack in the unoptimized code during
       // evaluation of the arguments.
       CHECK_ALIVE(VisitForValue(expr->expression()));
       HValue* function = Top();
-      HGlobalObject* global = Add<HGlobalObject>();
-      HGlobalReceiver* receiver = Add<HGlobalReceiver>(global);
-      Push(receiver);
+      Push(graph()->GetConstantUndefined());
       CHECK_ALIVE(VisitExpressions(expr->arguments()));
       Add<HCheckValue>(function, expr->target());
+      // Install global receiver on stack.
+      Handle<JSObject> global_receiver(
+          expr->target()->context()->global_object()->global_receiver());
+      const int receiver_index = argument_count - 1;
+      HConstant* global_receiver_constant = Add<HConstant>(global_receiver);
+      environment()->SetExpressionStackAt(
+          receiver_index, global_receiver_constant);
 
       if (TryInlineBuiltinFunctionCall(expr, true)) {  // Drop the function.
         if (FLAG_trace_inlining) {
           PrintF("Inlining builtin ");
           expr->target()->ShortPrint();
           PrintF("\n");
         }
         return;
       }
 
       if (TryInlineCall(expr, true)) {   // Drop function from environment.
         return;
       } else {
         call = PreProcessCall(New<HInvokeFunction>(function, expr->target(),
                                                    argument_count));
         Drop(1);  // The function.
       }
 
     } else {
       CHECK_ALIVE(VisitForValue(expr->expression()));
       HValue* function = Top();
-      HGlobalObject* global_object = Add<HGlobalObject>();
-      HGlobalReceiver* receiver = Add<HGlobalReceiver>(global_object);
+      HValue* receiver = graph()->GetConstantHole();
       Push(Add<HPushArgument>(receiver));
       CHECK_ALIVE(VisitArgumentList(expr->arguments()));
-
-      call = New<HCallFunction>(function, argument_count);
+      call = New<HCallFunction>(
+          function, argument_count, NORMAL_CONTEXTUAL_CALL);
       Drop(argument_count + 1);
     }
   }
 
   return ast_context()->ReturnInstruction(call, expr->id());
 }
 
 
 void HOptimizedGraphBuilder::BuildInlinedCallNewArray(CallNew* expr) {
   NoObservableSideEffectsScope no_effects(this);
@@ skipping 2994 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal