https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111157
--- Comment #8 from Jan Hubicka <hubicka at ucw dot cz> --- > This is what I wanted to ask about. Looking at the dumps, ipa-modref > knows it is "killed." Is that enough or does it need to be also not > read to be know to be useless? The killed info means that the data does not need to be stored before function call (since it will always be overwritten before reading). So indeed that is what braks with ipa-cp/FRE transform now.
