Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/x64/full-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4317 matching lines @@
     case Token::TYPEOF: {
       Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
       { StackValueContext context(this);
         VisitForTypeofValue(expr->expression());
       }
       __ CallRuntime(Runtime::kTypeof, 1);
       context()->Plug(rax);
       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());
 
   // Invalid left-hand-sides are rewritten to have a 'throw
   // ReferenceError' as the left-hand side.
   if (!expr->expression()->IsValidLeftHandSide()) {
     VisitForEffect(expr->expression());
     return;
   }
@@ skipping 528 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64