[stubs] Further optimize Load/StoreGlobalViaContext stubs.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 6baea7fd7b640564dd56056f093a9f41dc2a3a6c..50a28332e0c7f857c175b3cc567d2a3b795738a8 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -5036,7 +5036,6 @@ void InternalArrayConstructorStub::Generate(MacroAssembler* masm) {
 void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context_reg = rsi;
   Register slot_reg = rbx;
-  Register name_reg = rcx;
   Register result_reg = rax;
   Label slow_case;
 
@@ -5060,16 +5059,14 @@ void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
   __ Integer32ToSmi(slot_reg, slot_reg);
   __ PopReturnAddressTo(kScratchRegister);
   __ Push(slot_reg);
-  __ Push(name_reg);
   __ Push(kScratchRegister);
-  __ TailCallRuntime(Runtime::kLoadGlobalViaContext, 2, 1);
+  __ TailCallRuntime(Runtime::kLoadGlobalViaContext, 1, 1);
 }
 
 
 void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context_reg = rsi;
   Register slot_reg = rbx;
-  Register name_reg = rcx;
   Register value_reg = rax;
   Register cell_reg = r8;
   Register cell_details_reg = rdx;
@@ -5079,7 +5076,6 @@ void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   if (FLAG_debug_code) {
     __ CompareRoot(value_reg, Heap::kTheHoleValueRootIndex);
     __ Check(not_equal, kUnexpectedValue);
-    __ AssertName(name_reg);
   }
 
   // Go up context chain to the script context.
@@ -5103,7 +5099,6 @@ void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
           Immediate(PropertyDetails::PropertyCellTypeField::kMask |
                     PropertyDetails::KindField::kMask));
 
-
   // Check if PropertyCell holds mutable data.
   Label not_mutable_data;
   __ cmpl(cell_details_reg,
@@ -5181,13 +5176,12 @@ void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   __ Integer32ToSmi(slot_reg, slot_reg);
   __ PopReturnAddressTo(kScratchRegister);
   __ Push(slot_reg);
-  __ Push(name_reg);
   __ Push(value_reg);
   __ Push(kScratchRegister);
   __ TailCallRuntime(is_strict(language_mode())
                          ? Runtime::kStoreGlobalViaContext_Strict
                          : Runtime::kStoreGlobalViaContext_Sloppy,
-                     3, 1);
+                     2, 1);
 }