MIPS: Replace DeoptimizeOnUndefined with whitelisting AllowUndefinedAsNan

Port r14894 (0ca991f0)

BUG=

Review URL: https://codereview.chromium.org/15713017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14895 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/lithium-codegen-mips.cc

@@ -4685,7 +4685,7 @@ void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
 
 void LCodeGen::EmitNumberUntagD(Register input_reg,
                                 DoubleRegister result_reg,
-                                bool deoptimize_on_undefined,
+                                bool allow_undefined_as_nan,
                                 bool deoptimize_on_minus_zero,
                                 LEnvironment* env,
                                 NumberUntagDMode mode) {
@@ -4702,7 +4702,7 @@ void LCodeGen::EmitNumberUntagD(Register input_reg,
     // Heap number map check.
     __ lw(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
     __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
-    if (deoptimize_on_undefined) {
+    if (!allow_undefined_as_nan) {
       DeoptimizeIf(ne, env, scratch, Operand(at));
     } else {
       Label heap_number, convert;
@@ -4875,7 +4875,7 @@ void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
   }
 
   EmitNumberUntagD(input_reg, result_reg,
-                   instr->hydrogen()->deoptimize_on_undefined(),
+                   instr->hydrogen()->allow_undefined_as_nan(),
                    instr->hydrogen()->deoptimize_on_minus_zero(),
                    instr->environment(),
                    mode);

src/mips/lithium-codegen-mips.h

@@ -343,7 +343,7 @@ class LCodeGen BASE_EMBEDDED {
   void EmitCmpI(LOperand* left, LOperand* right);
   void EmitNumberUntagD(Register input,
                         DoubleRegister result,
-                        bool deoptimize_on_undefined,
+                        bool allow_undefined_as_nan,
                         bool deoptimize_on_minus_zero,
                         LEnvironment* env,
                         NumberUntagDMode mode);