http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57848
--- Comment #9 from Kai Tietz <ktietz at gcc dot gnu.org> --- Hmm, I tried to reproduce this case with testcase: extern unsigned int __builtin_ia32_crc32si (unsigned int, unsigned int); #pragma GCC target("sse4.2") and I don't get this ICE. I might do here something wrong, but I can't reproduce it.