VectorICs: Create a StoreICState to more easily create matching code stubs.

src/ic/ic-state.h

 // Copyright 2012 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_IC_STATE_H_
 #define V8_IC_STATE_H_
 
 #include "src/macro-assembler.h"
 
 namespace v8 {
@@ skipping 206 matching lines @@
   static ContextualMode GetContextualMode(ExtraICState state) {
     return LoadICState(state).contextual_mode();
   }
 
  private:
   class ContextualModeBits : public BitField<ContextualMode, 0, 1> {};
   STATIC_ASSERT(static_cast<int>(NOT_CONTEXTUAL) == 0);
 
   const ExtraICState state_;
 };
+
+
+class StoreICState final BASE_EMBEDDED {
+ public:
+  explicit StoreICState(ExtraICState extra_ic_state) : state_(extra_ic_state) {}
+
+  explicit StoreICState(LanguageMode mode)
+      : state_(LanguageModeState::encode(mode)) {}
+
+  ExtraICState GetExtraICState() const { return state_; }
+
+  LanguageMode language_mode() const {
+    return LanguageModeState::decode(state_);
+  }
+
+  static LanguageMode GetLanguageMode(ExtraICState state) {
+    return StoreICState(state).language_mode();
+  }
+
+  class LanguageModeState : public BitField<LanguageMode, 1, 2> {};
+  STATIC_ASSERT(i::LANGUAGE_END == 3);
+
+  // For convenience, a statically declared encoding of strict mode extra
+  // IC state.
+  static const ExtraICState kStrictModeState = STRICT
+                                               << LanguageModeState::kShift;
+
+ private:
+  const ExtraICState state_;
+};
 }
 }
 
 #endif  // V8_IC_STATE_H_