Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/runtime.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 7227 matching lines @@
 RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberXor) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 2);
 
   CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
   CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
   return isolate->heap()->NumberFromInt32(x ^ y);
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberNot) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 1);
-
-  CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
-  return isolate->heap()->NumberFromInt32(~x);
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberShl) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 2);
 
   CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
   CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
   return isolate->heap()->NumberFromInt32(x << (y & 0x1f));
 }
 
 
@@ skipping 6903 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal