[turbofan] Combine Word32And with Int32Add and negative power of two.

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/generic-node.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/node.h"
@@ skipping 62 matching lines @@
 
 // A pattern matcher for integer constants.
 template <typename T, IrOpcode::Value kOpcode>
 struct IntMatcher FINAL : public ValueMatcher<T, kOpcode> {
   explicit IntMatcher(Node* node) : ValueMatcher<T, kOpcode>(node) {}
 
   bool IsPowerOf2() const {
     return this->HasValue() && this->Value() > 0 &&
            (this->Value() & (this->Value() - 1)) == 0;
   }
+  bool IsNegativePowerOf2() const {
+    return this->HasValue() && this->Value() < 0 &&
+           (-this->Value() & (-this->Value() - 1)) == 0;
+  }
 };
 
 typedef IntMatcher<int32_t, IrOpcode::kInt32Constant> Int32Matcher;
 typedef IntMatcher<uint32_t, IrOpcode::kInt32Constant> Uint32Matcher;
 typedef IntMatcher<int64_t, IrOpcode::kInt64Constant> Int64Matcher;
 typedef IntMatcher<uint64_t, IrOpcode::kInt64Constant> Uint64Matcher;
 #if V8_HOST_ARCH_32_BIT
 typedef Int32Matcher IntPtrMatcher;
 typedef Uint32Matcher UintPtrMatcher;
 #else
@@ skipping 284 matching lines @@
 };
 
 typedef ScaledWithOffsetMatcher<Int32AddMatcher> ScaledWithOffset32Matcher;
 typedef ScaledWithOffsetMatcher<Int64AddMatcher> ScaledWithOffset64Matcher;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_