Support fast case for-in in Crankshaft.

src/arm/lithium-arm.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 154 matching lines @@
   V(SubI)                                       \
   V(TaggedToI)                                  \
   V(ThisFunction)                               \
   V(Throw)                                      \
   V(ToFastProperties)                           \
   V(TransitionElementsKind)                     \
   V(Typeof)                                     \
   V(TypeofIsAndBranch)                          \
   V(UnaryMathOperation)                         \
   V(UnknownOSRValue)                            \
-  V(ValueOf)
+  V(ValueOf)                                    \
+  V(ForInPrepareMap)                            \
+  V(ForInCacheArray)                            \
+  V(CheckMapValue)                              \
+  V(LoadFieldByIndex)
+
 
 
 #define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)              \
   virtual Opcode opcode() const { return LInstruction::k##type; } \
   virtual void CompileToNative(LCodeGen* generator);              \
   virtual const char* Mnemonic() const { return mnemonic; }       \
   static L##type* cast(LInstruction* instr) {                     \
     ASSERT(instr->Is##type());                                    \
     return reinterpret_cast<L##type*>(instr);                     \
   }
@@ skipping 1871 matching lines @@
     inputs_[1] = object;
   }
 
   LOperand* key() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(In, "in")
 };
 
 
+class LForInPrepareMap: public LTemplateInstruction<1, 1, 0> {
+ public:
+  LForInPrepareMap(LOperand* object) {
+    inputs_[0] = object;
+  }
+
+  LOperand* object() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ForInPrepareMap, "for-in-prepare-map")
+};
+
+
+class LForInCacheArray: public LTemplateInstruction<1, 1, 0> {
+ public:
+  LForInCacheArray(LOperand* map) {
+    inputs_[0] = map;
+  }
+
+  LOperand* map() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ForInCacheArray, "for-in-cache-array")
+
+  int idx() {
+    return HForInCacheArray::cast(this->hydrogen_value())->idx();
+  }
+};
+
+
+class LCheckMapValue: public LTemplateInstruction<1, 2, 0> {

[fschneider, 2012/02/22 10:16:45]

Since there is no output operand: <0, 2, 0>

+ public:
+  LCheckMapValue(LOperand* value, LOperand* map) {
+    inputs_[0] = value;
+    inputs_[1] = map;
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* map() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckMapValue, "check-map-value")
+};
+
+
+class LLoadFieldByIndex: public LTemplateInstruction<1, 2, 0> {
+ public:
+  LLoadFieldByIndex(LOperand* object, LOperand* index) {
+    inputs_[0] = object;
+    inputs_[1] = index;
+  }
+
+  LOperand* object() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadFieldByIndex, "load-field-by-index")
+};
+
+
 class LChunkBuilder;
 class LChunk: public ZoneObject {
  public:
   explicit LChunk(CompilationInfo* info, HGraph* graph);
 
   void AddInstruction(LInstruction* instruction, HBasicBlock* block);
   LConstantOperand* DefineConstantOperand(HConstant* constant);
   Handle<Object> LookupLiteral(LConstantOperand* operand) const;
   Representation LookupLiteralRepresentation(LConstantOperand* operand) const;
 
@@ skipping 199 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_ARM_H_