https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81317
--- Comment #5 from Randy MacLeod <randy.macleod at windriver dot com> --- I agree that the creduce output should be ignored. :( I ran 'delta' again with a manually cleaned up input and I got a minimal reproducer that is shorter: wc -l output: old: 4756 /tmp/jdcolor-altivec.i 269 /tmp/jdcolor-altivec-testcase-min.i new: 104 /tmp/bar.i Note the comment in bar.i: unaligned_shift_index = __builtin_vec_ld( num_cols , outptr); /* replacing num_cols above with a constant such as 0, passes compile */