Replace BIT_NOT by XOR with ~0

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc	(revision 16038)
+++ src/x64/full-codegen-x64.cc	(working copy)
@@ -4335,32 +4335,12 @@
       break;
     }
 
-    case Token::BIT_NOT:
-      EmitUnaryOperation(expr, "[ UnaryOperation (BIT_NOT)");
-      break;
-
     default:
       UNREACHABLE();
   }
 }
 
 
-void FullCodeGenerator::EmitUnaryOperation(UnaryOperation* expr,
-                                           const char* comment) {
-  ASSERT_EQ(Token::BIT_NOT, expr->op());
-  // TODO(svenpanne): Allowing format strings in Comment would be nice here...
-  Comment cmt(masm_, comment);
-  UnaryOpStub stub(expr->op());
-  // UnaryOpStub expects the argument to be in the
-  // accumulator register rax.
-  VisitForAccumulatorValue(expr->expression());
-  SetSourcePosition(expr->position());
-  CallIC(stub.GetCode(isolate()), RelocInfo::CODE_TARGET,
-         expr->UnaryOperationFeedbackId());
-  context()->Plug(rax);
-}
-
-
 void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   Comment cmnt(masm_, "[ CountOperation");
   SetSourcePosition(expr->position());