Extend JSBuiltinReducer to cover Math.sqrt as well.

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 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/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 267 matching lines @@
       __ fnstsw_ax();
       __ sahf();
       __ j(parity_even, &mod_loop);
       // Move output to stack and clean up.
       __ fstp(1);
       __ fstp_d(Operand(esp, 0));
       __ movsd(i.OutputDoubleRegister(), Operand(esp, 0));
       __ add(esp, Immediate(kDoubleSize));
       break;
     }
+    case kSSEFloat64Sqrt:
+      __ sqrtsd(i.OutputDoubleRegister(), i.InputOperand(0));
+      break;
     case kSSEFloat64ToInt32:
       __ cvttsd2si(i.OutputRegister(), i.InputOperand(0));
       break;
     case kSSEFloat64ToUint32: {
       XMMRegister scratch = xmm0;
       __ Move(scratch, -2147483648.0);
       __ addsd(scratch, i.InputOperand(0));
       __ cvttsd2si(i.OutputRegister(), scratch);
       __ add(i.OutputRegister(), Immediate(0x80000000));
       break;
@@ skipping 649 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8