http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52574
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |jakub at gcc dot gnu.org Resolution| |INVALID --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-13 07:12:55 UTC --- The testcase is invalid C, while x86_64/i?86 will do the expected thing of doing unaligned loads/stores silently, it won't do that in vectorized code or for atomic accesses. You need to tell the compiler that ia isn't aligned through aligned attribute. E.g. typedef int T __attribute__((aligned (2))); and using T *__restrict ia instead of int *__restrict ia.