[x86] Faster/shorter code for stack checks.

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
+#include "src/assembler.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 #include "src/unique.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // A pattern matcher for nodes.
 struct NodeMatcher {
@@ skipping 128 matching lines @@
 
 // A pattern matcher for heap object constants.
 template <typename T>
 struct HeapObjectMatcher FINAL
     : public ValueMatcher<Unique<T>, IrOpcode::kHeapConstant> {
   explicit HeapObjectMatcher(Node* node)
       : ValueMatcher<Unique<T>, IrOpcode::kHeapConstant>(node) {}
 };
 
 
+// A pattern matcher for external reference constants.
+struct ExternalReferenceMatcher FINAL
+    : public ValueMatcher<ExternalReference, IrOpcode::kExternalConstant> {
+  explicit ExternalReferenceMatcher(Node* node)
+      : ValueMatcher<ExternalReference, IrOpcode::kExternalConstant>(node) {}
+};
+
+
+// For shorter pattern matching code, this struct matches the inputs to
+// machine-level load operations.
+template <typename Object>
+struct LoadMatcher : public NodeMatcher {
+  explicit LoadMatcher(Node* node)
+      : NodeMatcher(node), object_(InputAt(0)), index_(InputAt(1)) {}
+
+  typedef Object ObjectMatcher;
+
+  Object const& object() const { return object_; }
+  IntPtrMatcher const& index() const { return index_; }
+
+ private:
+  Object const object_;
+  IntPtrMatcher const index_;
+};
+
+
 // 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 : public NodeMatcher {
   explicit BinopMatcher(Node* node)
       : NodeMatcher(node), left_(InputAt(0)), right_(InputAt(1)) {
     if (HasProperty(Operator::kCommutative)) PutConstantOnRight();
   }
   BinopMatcher(Node* node, bool allow_input_swap)
@@ skipping 343 matching lines @@
 typedef BaseWithIndexAndDisplacementMatcher<Int32AddMatcher>
     BaseWithIndexAndDisplacement32Matcher;
 typedef BaseWithIndexAndDisplacementMatcher<Int64AddMatcher>
     BaseWithIndexAndDisplacement64Matcher;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_