[turbofan] Add length operand to LoadElement and StoreElement.

src/compiler/simplified-operator.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_SIMPLIFIED_OPERATOR_H_
 #define V8_COMPILER_SIMPLIFIED_OPERATOR_H_
 
 #include "src/compiler/machine-type.h"
 #include "src/handles.h"
 
@@ skipping 10 matching lines @@
 
 namespace compiler {
 
 // Forward declarations.
 class Operator;
 struct SimplifiedOperatorBuilderImpl;
 
 
 enum BaseTaggedness { kUntaggedBase, kTaggedBase };
 
+OStream& operator<<(OStream&, BaseTaggedness);
+
 // An access descriptor for loads/stores of fixed structures like field
 // accesses of heap objects. Accesses from either tagged or untagged base
 // pointers are supported; untagging is done automatically during lowering.
 struct FieldAccess {
   BaseTaggedness base_is_tagged;  // specifies if the base pointer is tagged.
   int offset;                     // offset of the field, without tag.
   Handle<Name> name;              // debugging only.
   Type* type;                     // type of the field.
   MachineType machine_type;       // machine type of the field.
 
   int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; }
 };
 
 
 // An access descriptor for loads/stores of indexed structures like characters
 // in strings or off-heap backing stores. Accesses from either tagged or
 // untagged base pointers are supported; untagging is done automatically during
 // lowering.
 struct ElementAccess {
   BaseTaggedness base_is_tagged;  // specifies if the base pointer is tagged.
   int header_size;                // size of the header, without tag.
   Type* type;                     // type of the element.
   MachineType machine_type;       // machine type of the element.
 
   int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; }
 };
 
+bool operator==(ElementAccess const& lhs, ElementAccess const& rhs);
+bool operator!=(ElementAccess const& lhs, ElementAccess const& rhs);
+
+OStream& operator<<(OStream&, ElementAccess const&);
+
 
 // If the accessed object is not a heap object, add this to the header_size.
 static const int kNonHeapObjectHeaderSize = kHeapObjectTag;
 
 
 const FieldAccess& FieldAccessOf(const Operator* op) WARN_UNUSED_RESULT;
 const ElementAccess& ElementAccessOf(const Operator* op) WARN_UNUSED_RESULT;
 
 
 // Interface for building simplified operators, which represent the
@@ skipping 47 matching lines @@
   const Operator* ChangeTaggedToUint32();
   const Operator* ChangeTaggedToFloat64();
   const Operator* ChangeInt32ToTagged();
   const Operator* ChangeUint32ToTagged();
   const Operator* ChangeFloat64ToTagged();
   const Operator* ChangeBoolToBit();
   const Operator* ChangeBitToBool();
 
   const Operator* LoadField(const FieldAccess&);
   const Operator* StoreField(const FieldAccess&);
-  const Operator* LoadElement(const ElementAccess&);
-  const Operator* StoreElement(const ElementAccess&);
+
+  // load-element [base + index], length
+  const Operator* LoadElement(ElementAccess const&);
+
+  // store-element [base + index], length, value
+  const Operator* StoreElement(ElementAccess const&);
 
  private:
   Zone* zone() const { return zone_; }
 
   const SimplifiedOperatorBuilderImpl& impl_;
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(SimplifiedOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_SIMPLIFIED_OPERATOR_H_