[turbofan]: More optimizations to add and subtract operations on x64

src/compiler/x64/code-generator-x64.cc

 // 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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 579 matching lines @@
         __ movsd(operand, i.InputDoubleRegister(index));
       }
       break;
     case kX64Lea32:
       __ leal(i.OutputRegister(), i.MemoryOperand());
       __ AssertZeroExtended(i.OutputRegister());
       break;
     case kX64Lea:
       __ leaq(i.OutputRegister(), i.MemoryOperand());
       break;
+    case kX64Dec32:
+      __ decl(i.OutputRegister());
+      break;
+    case kX64Inc32:
+      __ incl(i.OutputRegister());
+      break;
     case kX64Push:
       if (HasImmediateInput(instr, 0)) {
         __ pushq(i.InputImmediate(0));
       } else {
         if (instr->InputAt(0)->IsRegister()) {
           __ pushq(i.InputRegister(0));
         } else {
           __ pushq(i.InputOperand(0));
         }
       }
@@ skipping 421 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8