[turbofan] Add support for Int32SubWithOverflow.

src/compiler/ia32/instruction-selector-ia32.cc

 // 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.
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 285 matching lines @@
   IA32OperandGenerator g(this);
   Int32BinopMatcher m(node);
   if (m.left().Is(0)) {
     Emit(kIA32Neg, g.DefineSameAsFirst(node), g.Use(m.right().node()));
   } else {
     VisitBinop(this, node, kIA32Sub);
   }
 }
 
 
+void InstructionSelector::VisitInt32SubWithOverflow(Node* node) {
+  VisitBinopWithOverflow(this, node, kIA32Sub);
+}
+
+
 void InstructionSelector::VisitInt32Mul(Node* node) {
   IA32OperandGenerator g(this);
   Node* left = node->InputAt(0);
   Node* right = node->InputAt(1);
   if (g.CanBeImmediate(right)) {
     Emit(kIA32Imul, g.DefineAsRegister(node), g.Use(left),
          g.UseImmediate(right));
   } else if (g.CanBeImmediate(left)) {
     Emit(kIA32Imul, g.DefineAsRegister(node), g.Use(right),
          g.UseImmediate(left));
@@ skipping 239 matching lines @@
   if (descriptor->kind() == CallDescriptor::kCallAddress &&
       buffer.pushed_count > 0) {
     ASSERT(deoptimization == NULL && continuation == NULL);
     Emit(kPopStack | MiscField::encode(buffer.pushed_count), NULL);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8