Remove receiver conversion from function prologue

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 d8b7546529ad172c38f99a77704d4c498c3333a3..fd395633e8a61767b414866414725103d29498c7 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -526,14 +526,6 @@ bool AstGraphBuilder::CreateGraph(bool stack_check) {
     env.RawParameterBind(0, jsgraph()->TheHoleConstant());
   }
 
-  // Build receiver check for sloppy mode if necessary.
-  // TODO(mstarzinger/verwaest): Should this be moved back into the CallIC?
-  if (scope->has_this_declaration()) {
-    Node* original_receiver = env.RawParameterLookup(0);
-    Node* patched_receiver = BuildPatchReceiverToGlobalProxy(original_receiver);
-    env.RawParameterBind(0, patched_receiver);
-  }
-
   // Build local context only if there are context allocated variables.
   if (info()->num_heap_slots() > 0) {
     // Push a new inner context scope for the current activation.
@@ -3112,28 +3104,6 @@ Node* AstGraphBuilder::ProcessArguments(const Operator* op, int arity) {
 }
 
 
-Node* AstGraphBuilder::BuildPatchReceiverToGlobalProxy(Node* receiver) {
-  // Sloppy mode functions and builtins need to replace the receiver with the
-  // global proxy when called as functions (without an explicit receiver
-  // object). Otherwise there is nothing left to do here.
-  if (info()->MustReplaceUndefinedReceiverWithGlobalProxy()) {
-    IfBuilder receiver_check(this);
-    Node* undefined = jsgraph()->UndefinedConstant();
-    Node* check = NewNode(javascript()->StrictEqual(), receiver, undefined);
-    receiver_check.If(check);
-    receiver_check.Then();
-    Node* proxy = BuildLoadGlobalProxy();
-    environment()->Push(proxy);
-    receiver_check.Else();
-    environment()->Push(receiver);
-    receiver_check.End();
-    return environment()->Pop();
-  } else {
-    return receiver;
-  }
-}
-
-
 Node* AstGraphBuilder::BuildLocalActivationContext(Node* context) {
   Scope* scope = info()->scope();