[turbofan] Eliminate redundant masking operations for word8/word16 stores.

test/unittests/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_UNITTESTS_COMPILER_GRAPH_UNITTEST_H_
 #define V8_UNITTESTS_COMPILER_GRAPH_UNITTEST_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 23 matching lines @@
 class GraphTest : public TestWithContext, public TestWithZone {
  public:
   explicit GraphTest(int parameters = 1);
   virtual ~GraphTest();
 
  protected:
   Node* Parameter(int32_t index);
   Node* Float32Constant(volatile float value);
   Node* Float64Constant(volatile double value);
   Node* Int32Constant(int32_t value);
+  Node* Uint32Constant(uint32_t value) {
+    return Int32Constant(bit_cast<int32_t>(value));
+  }
   Node* Int64Constant(int64_t value);
   Node* NumberConstant(volatile double value);
   Node* HeapConstant(const Handle<HeapObject>& value);
   Node* HeapConstant(const Unique<HeapObject>& value);
   Node* FalseConstant();
   Node* TrueConstant();
   Node* UndefinedConstant();
 
   Matcher<Node*> IsFalseConstant();
   Matcher<Node*> IsTrueConstant();
@@ skipping 58 matching lines @@
                               const Matcher<Node*>& length_matcher,
                               const Matcher<Node*>& value_matcher,
                               const Matcher<Node*>& effect_matcher,
                               const Matcher<Node*>& control_matcher);
 
 Matcher<Node*> IsLoad(const Matcher<LoadRepresentation>& rep_matcher,
                       const Matcher<Node*>& base_matcher,
                       const Matcher<Node*>& index_matcher,
                       const Matcher<Node*>& effect_matcher,
                       const Matcher<Node*>& control_matcher);
-Matcher<Node*> IsStore(const Matcher<MachineType>& type_matcher,
-                       const Matcher<WriteBarrierKind>& write_barrier_matcher,
+Matcher<Node*> IsStore(const Matcher<StoreRepresentation>& rep_matcher,
                        const Matcher<Node*>& base_matcher,
                        const Matcher<Node*>& index_matcher,
                        const Matcher<Node*>& value_matcher,
                        const Matcher<Node*>& effect_matcher,
                        const Matcher<Node*>& control_matcher);
 Matcher<Node*> IsWord32And(const Matcher<Node*>& lhs_matcher,
                            const Matcher<Node*>& rhs_matcher);
 Matcher<Node*> IsWord32Sar(const Matcher<Node*>& lhs_matcher,
                            const Matcher<Node*>& rhs_matcher);
 Matcher<Node*> IsWord32Shl(const Matcher<Node*>& lhs_matcher,
@@ skipping 25 matching lines @@
 Matcher<Node*> IsTruncateFloat64ToFloat32(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_UNITTESTS_COMPILER_GRAPH_UNITTEST_H_