[stubs] Introduce AddStub and SubtractStub.

src/compiler/raw-machine-assembler.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_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 329 matching lines @@
     return AddNode(machine()->Word32PairSar(), low_word, high_word, shift);
   }
 
 #define INTPTR_BINOP(prefix, name)                     \
   Node* IntPtr##name(Node* a, Node* b) {               \
     return kPointerSize == 8 ? prefix##64##name(a, b)  \
                              : prefix##32##name(a, b); \
   }
 
   INTPTR_BINOP(Int, Add);
+  INTPTR_BINOP(Int, AddWithOverflow);
   INTPTR_BINOP(Int, Sub);
+  INTPTR_BINOP(Int, SubWithOverflow);
   INTPTR_BINOP(Int, LessThan);
   INTPTR_BINOP(Int, LessThanOrEqual);
   INTPTR_BINOP(Word, Equal);
   INTPTR_BINOP(Word, NotEqual);
   INTPTR_BINOP(Int, GreaterThanOrEqual);
   INTPTR_BINOP(Int, GreaterThan);
 
 #undef INTPTR_BINOP
 
 #define UINTPTR_BINOP(prefix, name)                    \
@@ skipping 367 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_