[stubs] Further optimize Load/StoreGlobalViaContext stubs.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index c034b223d840edaf224b618086b1e8e8a27331af..8cc6d39bf606671eb50ece20efae578301f50530 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -5119,7 +5119,6 @@ void InternalArrayConstructorStub::Generate(MacroAssembler* masm) {
 void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context_reg = esi;
   Register slot_reg = ebx;
-  Register name_reg = ecx;
   Register result_reg = eax;
   Label slow_case;
 
@@ -5143,25 +5142,23 @@ void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
   __ SmiTag(slot_reg);
   __ Pop(result_reg);  // Pop return address.
   __ Push(slot_reg);
-  __ Push(name_reg);
   __ Push(result_reg);  // Push return address.
-  __ TailCallRuntime(Runtime::kLoadGlobalViaContext, 2, 1);
+  __ TailCallRuntime(Runtime::kLoadGlobalViaContext, 1, 1);
 }
 
 
 void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context_reg = esi;
   Register slot_reg = ebx;
-  Register name_reg = ecx;
   Register value_reg = eax;
   Register cell_reg = edi;
   Register cell_details_reg = edx;
+  Register cell_value_reg = ecx;
   Label fast_heapobject_case, fast_smi_case, slow_case;
 
   if (FLAG_debug_code) {
     __ CompareRoot(value_reg, Heap::kTheHoleValueRootIndex);
     __ Check(not_equal, kUnexpectedValue);
-    __ AssertName(name_reg);
   }
 
   // Go up context chain to the script context.
@@ -5240,7 +5237,6 @@ void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   // Now either both old and new values must be SMIs or both must be heap
   // objects with same map.
   Label value_is_heap_object;
-  Register cell_value_reg = cell_details_reg;
   __ mov(cell_value_reg, FieldOperand(cell_reg, PropertyCell::kValueOffset));
   __ JumpIfNotSmi(value_reg, &value_is_heap_object, Label::kNear);
   __ JumpIfNotSmi(cell_value_reg, &slow_case, Label::kNear);
@@ -5261,13 +5257,12 @@ void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   __ SmiTag(slot_reg);
   __ Pop(cell_reg);  // Pop return address.
   __ Push(slot_reg);
-  __ Push(name_reg);
   __ Push(value_reg);
   __ Push(cell_reg);  // Push return address.
   __ TailCallRuntime(is_strict(language_mode())
                          ? Runtime::kStoreGlobalViaContext_Strict
                          : Runtime::kStoreGlobalViaContext_Sloppy,
-                     3, 1);
+                     2, 1);
 }