Extend JSBuiltinReducer to cover Math.sqrt as well.

src/compiler/x64/instruction-selector-x64.cc

 // Copyright 2014 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/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 541 matching lines @@
 
 void InstructionSelector::VisitFloat64Mod(Node* node) {
   X64OperandGenerator g(this);
   InstructionOperand* temps[] = {g.TempRegister(rax)};
   Emit(kSSEFloat64Mod, g.DefineSameAsFirst(node),
        g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)), 1,
        temps);
 }
 
 
+void InstructionSelector::VisitFloat64Sqrt(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64Sqrt, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitInt32AddWithOverflow(Node* node,
                                                     FlagsContinuation* cont) {
   VisitBinop(this, node, kX64Add32, cont);
 }
 
 
 void InstructionSelector::VisitInt32SubWithOverflow(Node* node,
                                                     FlagsContinuation* cont) {
   VisitBinop(this, node, kX64Sub32, cont);
 }
@@ skipping 136 matching lines @@
   call_instr->MarkAsCall();
   if (deoptimization != NULL) {
     DCHECK(continuation != NULL);
     call_instr->MarkAsControl();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8