MIPS: Optimize HWrapReceiver.

Port r18945 (699b03e)

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/145083018

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18960 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/lithium-codegen-mips.cc

@@ -3304,6 +3304,7 @@ void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
   // passed unchanged to builtins and strict-mode functions.
   Label global_object, result_in_receiver;
 
+  if (!instr->hydrogen()->known_function()) {
     // Do not transform the receiver to object for strict mode
     // functions.
     __ lw(scratch,
@@ -3317,6 +3318,7 @@ void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
     int32_t native_mask = 1 << (SharedFunctionInfo::kNative + kSmiTagSize);
     __ And(scratch, scratch, Operand(strict_mode_function_mask | native_mask));
     __ Branch(&result_in_receiver, ne, scratch, Operand(zero_reg));
+  }
 
   // Normal function. Replace undefined or null with global receiver.
   __ LoadRoot(scratch, Heap::kNullValueRootIndex);
@@ -3331,8 +3333,8 @@ void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
   __ GetObjectType(receiver, scratch, scratch);
   DeoptimizeIf(lt, instr->environment(),
                scratch, Operand(FIRST_SPEC_OBJECT_TYPE));
-  __ Branch(&result_in_receiver);
 
+  __ Branch(&result_in_receiver);
   __ bind(&global_object);
   __ lw(result, FieldMemOperand(function, JSFunction::kContextOffset));
   __ lw(result,

src/mips/lithium-mips.h

@@ -548,6 +548,7 @@ class LWrapReceiver V8_FINAL : public LTemplateInstruction<1, 2, 0> {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(WrapReceiver, "wrap-receiver")
+  DECLARE_HYDROGEN_ACCESSOR(WrapReceiver)
 
   LOperand* receiver() { return inputs_[0]; }
   LOperand* function() { return inputs_[1]; }