Extend JSBuiltinReducer to cover Math.sqrt as well.

src/compiler/arm/code-generator-arm.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/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 305 matching lines @@
       __ CallCFunction(ExternalReference::mod_two_doubles_operation(isolate()),
                        0, 2);
       // Move the result in the double result register.
       __ MovFromFloatResult(i.OutputDoubleRegister());
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
     case kArmVnegF64:
       __ vneg(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;
+    case kArmVsqrtF64:
+      __ vsqrt(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
+      break;
     case kArmVcvtF64S32: {
       SwVfpRegister scratch = kScratchDoubleReg.low();
       __ vmov(scratch, i.InputRegister(0));
       __ vcvt_f64_s32(i.OutputDoubleRegister(), scratch);
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
     case kArmVcvtF64U32: {
       SwVfpRegister scratch = kScratchDoubleReg.low();
       __ vmov(scratch, i.InputRegister(0));
@@ skipping 528 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8