MIPS: First steps towards named Litihium operands.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index e373c9ab18e3db3642309e67416d0bd98dec9bf7..3c376cec238fe2cd595eeabc9354cb6d037f95a2 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -4084,7 +4084,9 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
     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:
@@ -4108,7 +4110,9 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
     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:
@@ -4127,9 +4131,10 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
 
 
 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());
   FPURegister dbl_scratch = double_scratch0();