http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50628
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-10-06 13:55:24 UTC --- This is due to/exposed by revision 179566. The test succeeds with -O2 -fno-inline-small-functions, but fails with -O1 -finline-small-functions.