https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66677
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- trippels@gcc2-power8 libyuv_libyuv % cat row_common.ii int *a, *b; void fn1(char *p1) { int x; for (; x; x += 2) { a[x] = p1[0]; a[x + 1] = 0; b[x] = b[x + 1] = p1[1]; p1 += 4; } } trippels@gcc2-power8 libyuv_libyuv % c++ -O3 -std=gnu++11 -c row_common.ii row_common.ii: In function ‘void fn1(char*)’: row_common.ii:2:6: internal compiler error: in vect_transform_stmt, at tree-vect-stmts.c:7626