This macro probably would have been defined to "return" in some cases, to be put after a call to a function that doesn't return so that the compiler wouldn't think control would reach the end of a non-void function. It was only ever defined to expand to nothing, and now that [[noreturn]] is a standard attribute, it should never be needed going forward. Change-Id: I37625eab72deeaede77f9347116b9fddd75febf7 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35217 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>