First steps towards named Litihium operands.

src/arm/lithium-codegen-arm.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 4292 matching lines @@
   __ vcvt_f64_u32(ToDoubleRegister(output), flt_scratch);
 }
 
 
 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_;
   };
 
   Register src = ToRegister(instr->InputAt(0));
   Register dst = ToRegister(instr->result());
 
   DeferredNumberTagI* deferred = new(zone()) DeferredNumberTagI(this, instr);
   __ SmiTag(dst, src, SetCC);
   __ b(vs, 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, Operand(Smi::kMaxValue));
   __ b(hi, deferred->entry());
   __ SmiTag(reg, reg);
   __ bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
+                                    LOperand* value,
                                     IntegerSignedness signedness) {
   Label slow;
-  Register src = ToRegister(instr->InputAt(0));
+  Register src = ToRegister(value);
   Register dst = ToRegister(instr->result());
   DoubleRegister dbl_scratch = double_scratch0();
   SwVfpRegister flt_scratch = dbl_scratch.low();
 
   // Preserve the value of all registers.
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
 
   Label done;
   if (signedness == SIGNED_INT32) {
     // There was overflow, so bits 30 and 31 of the original integer
@@ skipping 1234 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal