MIPS: Replace DeoptimizeOnUndefined with whitelisting AllowUndefinedAsNan

src/mips/lithium-codegen-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 4667 matching lines @@
     __ SmiUntag(result, input);
     DeoptimizeIf(ne, instr->environment(), scratch, Operand(zero_reg));
   } else {
     __ SmiUntag(result, input);
   }
 }
 
 
 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) {
   Register scratch = scratch0();
 
   Label load_smi, heap_number, done;
 
   STATIC_ASSERT(NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE >
                 NUMBER_CANDIDATE_IS_ANY_TAGGED);
   if (mode >= NUMBER_CANDIDATE_IS_ANY_TAGGED) {
     // Smi check.
     __ UntagAndJumpIfSmi(scratch, input_reg, &load_smi);
 
     // 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;
       __ Branch(&heap_number, eq, scratch, Operand(at));
 
       // Convert undefined (and hole) to NaN.
       __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
       if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE) {
         __ Branch(&convert, eq, input_reg, Operand(at));
         __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
@@ skipping 152 matching lines @@
   } else if (value->IsLoadKeyed()) {
     HLoadKeyed* load = HLoadKeyed::cast(value);
     if (load->UsesMustHandleHole()) {
       if (load->hole_mode() == ALLOW_RETURN_HOLE) {
         mode = NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE;
       }
     }
   }
 
   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);
 }
 
 
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
   Register scratch2 = ToRegister(instr->temp());
@@ skipping 879 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal