http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49503
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-23 22:03:49 UTC --- (In reply to comment #10) > The testcase tests what glibc does, so IMHO it should stay as is. None of the > functions that are called with misaligned stack actually really require it to > be aligned. But gcc may generate SSE codes and assume stack is 16byte aligned, which leads to segfault.