Remove push(holder_reg) in CheckAccessGlobalProxy.

src/mips/macro-assembler-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 351 matching lines @@
 #endif
 
   // Load the native context of the current context.
   int offset =
       Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize;
   lw(scratch, FieldMemOperand(scratch, offset));
   lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset));
 
   // Check the context is a native context.
   if (emit_debug_code()) {
-    // TODO(119): Avoid push(holder_reg)/pop(holder_reg).
     push(holder_reg);  // Temporarily save holder on the stack.
     // Read the first word and compare to the native_context_map.
     lw(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset));
     LoadRoot(at, Heap::kNativeContextMapRootIndex);
     Check(eq, "JSGlobalObject::native_context should be a native context.",
           holder_reg, Operand(at));
     pop(holder_reg);  // Restore holder.
   }
 
   // Check if both contexts are the same.
   lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
   Branch(&same_contexts, eq, scratch, Operand(at));
 
   // Check the context is a native context.
   if (emit_debug_code()) {
-    // TODO(119): Avoid push(holder_reg)/pop(holder_reg).
     push(holder_reg);  // Temporarily save holder on the stack.
     mov(holder_reg, at);  // Move at to its holding place.
     LoadRoot(at, Heap::kNullValueRootIndex);
     Check(ne, "JSGlobalProxy::context() should not be null.",
           holder_reg, Operand(at));
 
     lw(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset));
     LoadRoot(at, Heap::kNativeContextMapRootIndex);
     Check(eq, "JSGlobalObject::native_context should be a native context.",
           holder_reg, Operand(at));
@@ skipping 5163 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS