First steps towards named Litihium operands.

src/ia32/lithium-codegen-ia32.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 4089 matching lines @@
                 ToDoubleRegister(temp));
 }
 
 
 void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
   class DeferredNumberTagI: public LDeferredCode {
    public:
     DeferredNumberTagI(LCodeGen* codegen, LNumberTagI* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
-      codegen()->DoDeferredNumberTagI(instr_, SIGNED_INT32);
+      codegen()->DoDeferredNumberTagI(instr_,
+                                      instr_->InputAt(0),
+                                      SIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
    private:
     LNumberTagI* instr_;
   };
 
   LOperand* input = instr->InputAt(0);
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
   DeferredNumberTagI* deferred = new(zone()) DeferredNumberTagI(this, instr);
   __ SmiTag(reg);
   __ j(overflow, deferred->entry());
   __ bind(deferred->exit());
 }
 
 
 void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
   class DeferredNumberTagU: public LDeferredCode {
    public:
     DeferredNumberTagU(LCodeGen* codegen, LNumberTagU* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
-      codegen()->DoDeferredNumberTagI(instr_, UNSIGNED_INT32);
+      codegen()->DoDeferredNumberTagI(instr_,
+                                      instr_->InputAt(0),
+                                      UNSIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
    private:
     LNumberTagU* instr_;
   };
 
   LOperand* input = instr->InputAt(0);
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
   DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr);
   __ cmp(reg, Immediate(Smi::kMaxValue));
   __ j(above, deferred->entry());
   __ SmiTag(reg);
   __ bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
+                                    LOperand* value,
                                     IntegerSignedness signedness) {
   Label slow;
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(value);
   Register tmp = reg.is(eax) ? ecx : eax;
 
   // Preserve the value of all registers.
   PushSafepointRegistersScope scope(this);
 
   Label done;
 
   if (signedness == SIGNED_INT32) {
     // There was overflow, so bits 30 and 31 of the original integer
     // disagree. Try to allocate a heap number in new space and store
@@ skipping 1332 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32