[turbofan] Initial import of SimplifiedOperatorReducer.

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 "src/compiler/common-operator.h"
+#include "src/compiler/node.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // A pattern matcher for nodes.
 struct NodeMatcher {
   explicit NodeMatcher(Node* node) : node_(node) {}
 
   Node* node() const { return node_; }
@@ skipping 66 matching lines @@
 template <typename T>
 struct FloatMatcher V8_FINAL : public ValueMatcher<T> {
   explicit FloatMatcher(Node* node) : ValueMatcher<T>(node) {}
 
   bool IsNaN() const { return this->HasValue() && std::isnan(this->Value()); }
 };
 
 typedef FloatMatcher<double> Float64Matcher;
 
 
+// A pattern matcher for heap object constants.
+struct HeapObjectMatcher V8_FINAL
+    : public ValueMatcher<PrintableUnique<HeapObject> > {
+  explicit HeapObjectMatcher(Node* node)
+      : ValueMatcher<PrintableUnique<HeapObject> >(node) {}
+
+  bool IsKnownGlobal(HeapObject* global) const {
+    return HasValue() && Value().IsKnownGlobal(global);
+  }
+};
+
+
 // For shorter pattern matching code, this struct matches both the left and
 // right hand sides of a binary operation and can put constants on the right
 // if they appear on the left hand side of a commutative operation.
 template <typename Left, typename Right>
 struct BinopMatcher V8_FINAL : public NodeMatcher {
   explicit BinopMatcher(Node* node)
       : NodeMatcher(node), left_(InputAt(0)), right_(InputAt(1)) {
     if (HasProperty(Operator::kCommutative)) PutConstantOnRight();
   }
 
@@ skipping 19 matching lines @@
 typedef BinopMatcher<Int32Matcher, Int32Matcher> Int32BinopMatcher;
 typedef BinopMatcher<Uint32Matcher, Uint32Matcher> Uint32BinopMatcher;
 typedef BinopMatcher<Int64Matcher, Int64Matcher> Int64BinopMatcher;
 typedef BinopMatcher<Uint64Matcher, Uint64Matcher> Uint64BinopMatcher;
 typedef BinopMatcher<Float64Matcher, Float64Matcher> Float64BinopMatcher;
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_