Extend JSBuiltinReducer to cover Math.sqrt as well.

src/compiler/graph-unittest.h

 // 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.
 
 #ifndef V8_COMPILER_GRAPH_UNITTEST_H_
 #define V8_COMPILER_GRAPH_UNITTEST_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 113 matching lines @@
 Matcher<Node*> IsUint32LessThanOrEqual(const Matcher<Node*>& lhs_matcher,
                                        const Matcher<Node*>& rhs_matcher);
 Matcher<Node*> IsChangeFloat64ToInt32(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsChangeFloat64ToUint32(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsChangeInt32ToFloat64(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsChangeInt32ToInt64(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsChangeUint32ToFloat64(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsChangeUint32ToUint64(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsTruncateFloat64ToInt32(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsTruncateInt64ToInt32(const Matcher<Node*>& input_matcher);
+Matcher<Node*> IsFloat64Sqrt(const Matcher<Node*>& input_matcher);
 
 }  //  namespace compiler
 }  //  namespace internal
 }  //  namespace v8
 
 #endif  // V8_COMPILER_GRAPH_UNITTEST_H_