[turbofan] Optimize JSConvertReceiver if we know something about the receiver.

src/compiler/access-builder.cc

Index: src/compiler/access-builder.cc
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 554d2a3c382e8c05cce65338afc7e042f403b5f5..c314e8046a8a71c6d3334013fa0d18fd880b1b14 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -132,9 +132,17 @@ FieldAccess AccessBuilder::ForStringLength(Zone* zone) {
 
 
 // static
+FieldAccess AccessBuilder::ForGlobalObjectGlobalProxy() {
+  FieldAccess access = {kTaggedBase, GlobalObject::kGlobalProxyOffset,
+                        Handle<Name>(), Type::Receiver(), kMachAnyTagged};
+  return access;
+}
+
+
+// static
 FieldAccess AccessBuilder::ForGlobalObjectNativeContext() {
   FieldAccess access = {kTaggedBase, GlobalObject::kNativeContextOffset,
-                        Handle<Name>(), Type::Any(), kMachAnyTagged};
+                        Handle<Name>(), Type::Internal(), kMachAnyTagged};
   return access;
 }