[x64] Make xmm0 allocatable and use xmm15 as scratch register instead.

src/crankshaft/x64/lithium-x64.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/crankshaft/x64/lithium-x64.h"
 
 #include <sstream>
 
 #if V8_TARGET_ARCH_X64
 
@@ skipping 696 matching lines @@
   }
 }
 
 
 LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
                                            HArithmeticBinaryOperation* instr) {
   DCHECK(instr->representation().IsDouble());
   DCHECK(instr->left()->representation().IsDouble());
   DCHECK(instr->right()->representation().IsDouble());
   if (op == Token::MOD) {
-    LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
+    LOperand* left = UseFixedDouble(instr->BetterLeftOperand(), xmm0);
     LOperand* right = UseFixedDouble(instr->BetterRightOperand(), xmm1);
     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
-    return MarkAsCall(DefineSameAsFirst(result), instr);
+    return MarkAsCall(DefineFixedDouble(result, xmm0), instr);
   } else {
     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
     LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
     return CpuFeatures::IsSupported(AVX) ? DefineAsRegister(result)
                                          : DefineSameAsFirst(result);
   }
 }
 
 
@@ skipping 1838 matching lines @@
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64