Deoptimization fix for HPushArgument.

src/lithium.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 34 matching lines @@
 
 class LOperand : public ZoneObject {
  public:
   enum Kind {
     INVALID,
     UNALLOCATED,
     CONSTANT_OPERAND,
     STACK_SLOT,
     DOUBLE_STACK_SLOT,
     REGISTER,
-    DOUBLE_REGISTER,
-    ARGUMENT
+    DOUBLE_REGISTER
   };
 
   LOperand() : value_(KindField::encode(INVALID)) { }
 
   Kind kind() const { return KindField::decode(value_); }
   int index() const { return static_cast<int>(value_) >> kKindFieldWidth; }
 #define LITHIUM_OPERAND_PREDICATE(name, type) \
   bool Is##name() const { return kind() == type; }
   LITHIUM_OPERAND_LIST(LITHIUM_OPERAND_PREDICATE)
-  LITHIUM_OPERAND_PREDICATE(Argument, ARGUMENT)
   LITHIUM_OPERAND_PREDICATE(Unallocated, UNALLOCATED)
   LITHIUM_OPERAND_PREDICATE(Ignored, INVALID)
 #undef LITHIUM_OPERAND_PREDICATE
   bool Equals(LOperand* other) const { return value_ == other->value_; }
 
   void PrintTo(StringStream* stream);
   void ConvertTo(Kind kind, int index) {
     value_ = KindField::encode(kind);
     value_ |= index << kKindFieldWidth;
     ASSERT(this->index() == index);
@@ skipping 258 matching lines @@
 
  private:
   static const int kNumCachedOperands = 128;
   static LConstantOperand* cache;
 
   LConstantOperand() : LOperand() { }
   explicit LConstantOperand(int index) : LOperand(CONSTANT_OPERAND, index) { }
 };
 
 
-class LArgument V8_FINAL : public LOperand {
- public:
-  explicit LArgument(int index) : LOperand(ARGUMENT, index) { }
-
-  static LArgument* cast(LOperand* op) {
-    ASSERT(op->IsArgument());
-    return reinterpret_cast<LArgument*>(op);
-  }
-};
-
-
 class LStackSlot V8_FINAL : public LOperand {
  public:
   static LStackSlot* Create(int index, Zone* zone) {
     ASSERT(index >= 0);
     if (index < kNumCachedOperands) return &cache[index];
     return new(zone) LStackSlot(index);
   }
 
   static LStackSlot* cast(LOperand* op) {
     ASSERT(op->IsStackSlot());
@@ skipping 306 matching lines @@
   void Advance() {
     ASSERT(!Done());
     ++current_;
     SkipUninteresting();
   }
 
   LEnvironment* env() { return env_; }
 
  private:
   bool ShouldSkip(LOperand* op) {
-    return op == NULL || op->IsConstantOperand() || op->IsArgument();
+    return op == NULL || op->IsConstantOperand();
   }
 
   // Skip until something interesting, beginning with and including current_.
   void SkipUninteresting() {
     while (current_ < limit_ && ShouldSkip(env_->values()->at(current_))) {
       ++current_;
     }
   }
 
   LEnvironment* env_;
@@ skipping 145 matching lines @@
  private:
   LChunk* chunk_;
 
   DISALLOW_COPY_AND_ASSIGN(LPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_H_