[turbofan] Add new Float32Abs and Float64Abs operators.

src/compiler/node-matchers.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_NODE_MATCHERS_H_
 #define V8_COMPILER_NODE_MATCHERS_H_
 
 #include <cmath>
 
 // TODO(turbofan): Move ExternalReference out of assembler.h
@@ skipping 12 matching lines @@
 
   Node* node() const { return node_; }
   const Operator* op() const { return node()->op(); }
   IrOpcode::Value opcode() const { return node()->opcode(); }
 
   bool HasProperty(Operator::Property property) const {
     return op()->HasProperty(property);
   }
   Node* InputAt(int index) const { return node()->InputAt(index); }
 
+  bool Equals(const Node* node) const { return node_ == node; }
+
   bool IsComparison() const;
 
 #define DEFINE_IS_OPCODE(Opcode) \
   bool Is##Opcode() const { return opcode() == IrOpcode::k##Opcode; }
   ALL_OP_LIST(DEFINE_IS_OPCODE)
 #undef DEFINE_IS_OPCODE
 
  private:
   Node* node_;
 };
@@ skipping 91 matching lines @@
 
 // A pattern matcher for floating point constants.
 template <typename T, IrOpcode::Value kOpcode>
 struct FloatMatcher FINAL : public ValueMatcher<T, kOpcode> {
   explicit FloatMatcher(Node* node) : ValueMatcher<T, kOpcode>(node) {}
 
   bool IsMinusZero() const {
     return this->Is(0.0) && std::signbit(this->Value());
   }
   bool IsNaN() const { return this->HasValue() && std::isnan(this->Value()); }
+  bool IsZero() const { return this->Is(0.0) && !std::signbit(this->Value()); }
 };
 
 typedef FloatMatcher<float, IrOpcode::kFloat32Constant> Float32Matcher;
 typedef FloatMatcher<double, IrOpcode::kFloat64Constant> Float64Matcher;
 typedef FloatMatcher<double, IrOpcode::kNumberConstant> NumberMatcher;
 
 
 // A pattern matcher for heap object constants.
 template <typename T>
 struct HeapObjectMatcher FINAL
@@ skipping 420 matching lines @@
   Node* branch_;
   Node* if_true_;
   Node* if_false_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_