MIPS64: Improve and fix nan hole checks and canonicalization.

src/ic/mips64/ic-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/codegen.h"
@@ skipping 650 matching lines @@
   // HOLECHECK: guards "A[i] double hole?"
   // We have to see if the double version of the hole is present. If so
   // go to the runtime.
   __ Daddu(address, elements,
            Operand(FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32) -
                    kHeapObjectTag));
   __ SmiScale(at, key, kPointerSizeLog2);
   __ daddu(address, address, at);
   __ lw(scratch_value, MemOperand(address));
   __ Branch(&fast_double_without_map_check, ne, scratch_value,
-            Operand(kHoleNanUpper32));
+            Operand(static_cast<int32_t>(kHoleNanUpper32)));
   __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch_value,
                                       slow);
 
   __ bind(&fast_double_without_map_check);
   __ StoreNumberToDoubleElements(value, key,
                                  elements,  // Overwritten.
                                  a3,        // Scratch regs...
                                  a4, &transition_double_elements);
   if (increment_length == kIncrementLength) {
     // Add 1 to receiver->length.
@@ skipping 305 matching lines @@
     patcher.ChangeBranchCondition(ne);
   } else {
     DCHECK(Assembler::IsBne(branch_instr));
     patcher.ChangeBranchCondition(eq);
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS64