No. See this for details on how UB is handled by compilers: http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html http://blog.llvm.org/2011/05/

No. See this for details on how UB is handled by compilers: http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html http://blog.llvm.org/2011/05/what-every-c-programmer-should-... The TL;DR is that compilers compile code based on assumptions that UB won't be invoked. This sometimes produces extremely surprising results which have nothing to do with the hardware/OS.