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[Bug tree-optimization/49518] [4.6/4.7 Regression] ICE in vect_enhance_data_refs_alignment, at tree-vect-data-refs.c:1555
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 24 Jun 2011 09:21:55 +0000
- Subject: [Bug tree-optimization/49518] [4.6/4.7 Regression] ICE in vect_enhance_data_refs_alignment, at tree-vect-data-refs.c:1555
- Auto-submitted: auto-generated
- References: <bug-49518-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49518
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-06-24 09:21:53 UTC ---
nelements is here 16, while vf is just 2 (as the loop also operates on ints).
mis is 2 (one iteration has been peeled already before vectorization).
So, npeel_tmp is 14 and as cost model is used, the loop with the assertion that
npeel_tmp <= vf iterates at least once.
Richard, can you please look at this?
Perhaps we want to and with smaller of vf and nelements & (nelements - 1) & (vf
- 1)?