X87: fix the Sqrt issue.

src/x87/lithium-x87.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_X87
 
 #include "src/hydrogen-osr.h"
 #include "src/lithium-inl.h"
@@ skipping 1234 matching lines @@
   LOperand* value = UseRegisterAtStart(instr->value());
   LOperand* temp1 = FixedTemp(ecx);
   LOperand* temp2 = FixedTemp(edx);
   LMathExp* result = new(zone()) LMathExp(value, temp1, temp2);
   return MarkAsCall(DefineSameAsFirst(result), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
-  LMathSqrt* result = new(zone()) LMathSqrt(input);
-  return DefineSameAsFirst(result);
+  LOperand* temp1 = FixedTemp(ecx);
+  LOperand* temp2 = FixedTemp(edx);
+  LMathSqrt* result = new(zone()) LMathSqrt(input, temp1, temp2);
+  return MarkAsCall(DefineSameAsFirst(result), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
   LMathPowHalf* result = new (zone()) LMathPowHalf(input);
   return DefineSameAsFirst(result);
 }
 
 
@@ skipping 1442 matching lines @@
   LOperand* function = UseRegisterAtStart(instr->function());
   LAllocateBlockContext* result =
       new(zone()) LAllocateBlockContext(context, function);
   return MarkAsCall(DefineFixed(result, esi), instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87