Implement optional turbofan UnalignedLoad and UnalignedStore operators

src/compiler/opcodes.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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 // Opcodes for control operators.
@@ skipping 327 matching lines @@
   V(Float64RoundTiesEven)       \
   V(Float64ExtractLowWord32)    \
   V(Float64ExtractHighWord32)   \
   V(Float64InsertLowWord32)     \
   V(Float64InsertHighWord32)    \
   V(LoadStackPointer)           \
   V(LoadFramePointer)           \
   V(LoadParentFramePointer)     \
   V(CheckedLoad)                \
   V(CheckedStore)               \
+  V(UnalignedLoad)              \
+  V(UnalignedStore)             \
   V(Int32PairAdd)               \
   V(Int32PairSub)               \
   V(Int32PairMul)               \
   V(Word32PairShl)              \
   V(Word32PairShr)              \
   V(Word32PairSar)
 
 #define VALUE_OP_LIST(V) \
   COMMON_OP_LIST(V)      \
   SIMPLIFIED_OP_LIST(V)  \
@@ skipping 71 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_