Extend JSBuiltinReducer to cover Math.sqrt as well.

src/compiler/arm/instruction-selector-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/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 72 matching lines @@
       case kArmUbfx:
       case kArmVcmpF64:
       case kArmVaddF64:
       case kArmVsubF64:
       case kArmVmulF64:
       case kArmVmlaF64:
       case kArmVmlsF64:
       case kArmVdivF64:
       case kArmVmodF64:
       case kArmVnegF64:
+      case kArmVsqrtF64:
       case kArmVcvtF64S32:
       case kArmVcvtF64U32:
       case kArmVcvtS32F64:
       case kArmVcvtU32F64:
       case kArmPush:
         return false;
     }
     UNREACHABLE();
     return false;
   }
@@ skipping 658 matching lines @@
 }
 
 
 void InstructionSelector::VisitFloat64Mod(Node* node) {
   ArmOperandGenerator g(this);
   Emit(kArmVmodF64, g.DefineAsFixed(node, d0), g.UseFixed(node->InputAt(0), d0),
        g.UseFixed(node->InputAt(1), d1))->MarkAsCall();
 }
 
 
+void InstructionSelector::VisitFloat64Sqrt(Node* node) {
+  ArmOperandGenerator g(this);
+  Emit(kArmVsqrtF64, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {
   ArmOperandGenerator g(this);
   CallDescriptor* descriptor = OpParameter<CallDescriptor*>(call);
 
   FrameStateDescriptor* frame_state_descriptor = NULL;
   if (descriptor->NeedsFrameState()) {
     frame_state_descriptor =
         GetFrameStateDescriptor(call->InputAt(descriptor->InputCount()));
   }
@@ skipping 153 matching lines @@
   } else {
     DCHECK(cont->IsSet());
     Emit(cont->Encode(kArmVcmpF64), g.DefineAsRegister(cont->result()),
          g.UseRegister(m.left().node()), g.UseRegister(m.right().node()));
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8