http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59569
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 31494 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31494&action=edit A testcase [hjl@gnu-mic-2 00000001]$ /export/project/git/gcc-regression/master/206150/usr/bin/gcc -S -O3 -funroll-loops -ffast-math pr59569.c pr59569.c: In function ‘Perl_pp_splice’: pr59569.c:7304:6: internal compiler error: in vect_create_destination_var, at tree-vect-data-refs.c:4294 OP * Perl_pp_splice(void) ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. [hjl@gnu-mic-2 00000001]$