[turbofan] support for Int64 in CheckedLoad/CheckedStore on 64-bit platforms.

src/compiler/instruction-codes.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_INSTRUCTION_CODES_H_
 #define V8_COMPILER_INSTRUCTION_CODES_H_
 
 #include <iosfwd>
 
 #if V8_TARGET_ARCH_ARM
@@ skipping 38 matching lines @@
   V(ArchDeoptimize)           \
   V(ArchRet)                  \
   V(ArchStackPointer)         \
   V(ArchFramePointer)         \
   V(ArchTruncateDoubleToI)    \
   V(CheckedLoadInt8)          \
   V(CheckedLoadUint8)         \
   V(CheckedLoadInt16)         \
   V(CheckedLoadUint16)        \
   V(CheckedLoadWord32)        \
+  V(CheckedLoadWord64)        \
   V(CheckedLoadFloat32)       \
   V(CheckedLoadFloat64)       \
   V(CheckedStoreWord8)        \
   V(CheckedStoreWord16)       \
   V(CheckedStoreWord32)       \
+  V(CheckedStoreWord64)       \
   V(CheckedStoreFloat32)      \
   V(CheckedStoreFloat64)      \
   TARGET_ARCH_OPCODE_LIST(V)
 
 enum ArchOpcode {
 #define DECLARE_ARCH_OPCODE(Name) k##Name,
   ARCH_OPCODE_LIST(DECLARE_ARCH_OPCODE)
 #undef DECLARE_ARCH_OPCODE
 #define COUNT_ARCH_OPCODE(Name) +1
   kLastArchOpcode = -1 ARCH_OPCODE_LIST(COUNT_ARCH_OPCODE)
@@ skipping 64 matching lines @@
 typedef BitField<AddressingMode, 8, 5> AddressingModeField;
 typedef BitField<FlagsMode, 13, 2> FlagsModeField;
 typedef BitField<FlagsCondition, 15, 4> FlagsConditionField;
 typedef BitField<int, 19, 13> MiscField;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_CODES_H_