X87: fix the Sqrt issue.

src/x87/lithium-x87.h

Index: src/x87/lithium-x87.h
diff --git a/src/x87/lithium-x87.h b/src/x87/lithium-x87.h
index cf0e7b2d92c0ef9f3886e08754ea3274bfb4a4ca..dbb18ecabb78e9c1c6550cdeca3b40c1bf167444 100644
--- a/src/x87/lithium-x87.h
+++ b/src/x87/lithium-x87.h
@@ -973,13 +973,19 @@ class LMathExp FINAL : public LTemplateInstruction<1, 1, 2> {
 };
 
 
-class LMathSqrt FINAL : public LTemplateInstruction<1, 1, 0> {
+class LMathSqrt FINAL : public LTemplateInstruction<1, 1, 2> {
  public:
-  explicit LMathSqrt(LOperand* value) {
+  explicit LMathSqrt(LOperand* value,
+                     LOperand* temp1,
+                     LOperand* temp2) {
     inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
   }
 
   LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(MathSqrt, "math-sqrt")
 };