https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117229
--- Comment #12 from Andrew Pinski <pinskia at gcc dot gnu.org> --- >but why for '-march=gfx908' only, but not '-march=gfx1100' (or nvptx, for >example) Is newlib compiled for each of these multilib? If so it could be ./newlib/libc/string/strstr.c (strstr) in newlib is miscompiled with the -march=gfx908 option. so you need to debug that. One option is disable the "Use the Quick-Search algorithm for needle lengths less than 255" optimization part of strstr.c first and see if that is miscompiled. since this case the needle is short (less than 30 characters).
