[turbofan] Add checked load/store operators.

src/compiler/machine-operator.h

 // Copyright 2013 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_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/machine-type.h"
 
@@ skipping 35 matching lines @@
 bool operator==(StoreRepresentation, StoreRepresentation);
 bool operator!=(StoreRepresentation, StoreRepresentation);
 
 size_t hash_value(StoreRepresentation);
 
 std::ostream& operator<<(std::ostream&, StoreRepresentation);
 
 StoreRepresentation const& StoreRepresentationOf(Operator const*);
 
 
+// A CheckedLoad needs a MachineType.
+typedef MachineType CheckedLoadRepresentation;
+
+CheckedLoadRepresentation CheckedLoadRepresentationOf(Operator const*);
+
+
+// A CheckedStore needs a MachineType.
+typedef MachineType CheckedStoreRepresentation;
+
+CheckedStoreRepresentation CheckedStoreRepresentationOf(Operator const*);
+
+
 // Interface for building machine-level operators. These operators are
 // machine-level but machine-independent and thus define a language suitable
 // for generating code to run on architectures such as ia32, x64, arm, etc.
 class MachineOperatorBuilder FINAL : public ZoneObject {
  public:
   // Flags that specify which operations are available. This is useful
   // for operations that are unsupported by some back-ends.
   enum Flag {
     kNoFlags = 0u,
     kFloat64Floor = 1u << 0,
@@ skipping 101 matching lines @@
 
   // load [base + index]
   const Operator* Load(LoadRepresentation rep);
 
   // store [base + index], value
   const Operator* Store(StoreRepresentation rep);
 
   // Access to the machine stack.
   const Operator* LoadStackPointer();
 
+  // checked-load heap, index, length
+  const Operator* CheckedLoad(CheckedLoadRepresentation);
+  // checked-store heap, index, length, value
+  const Operator* CheckedStore(CheckedStoreRepresentation);
+
   // Target machine word-size assumed by this builder.
   bool Is32() const { return word() == kRepWord32; }
   bool Is64() const { return word() == kRepWord64; }
   MachineType word() const { return word_; }
 
 // Pseudo operators that translate to 32/64-bit operators depending on the
 // word-size of the target machine assumed by this builder.
 #define PSEUDO_OP_LIST(V) \
   V(Word, And)            \
   V(Word, Or)             \
@@ skipping 29 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(MachineOperatorBuilder);
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_