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From: Richard Biener <rguenth@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-2004] Do not set both LOOP_C_INFINITE and LOOP_C_FINITE on vectorized loop Date: Mon, 5 Jul 2021 11:38:54 +0000 (GMT) [thread overview] Message-ID: <20210705113854.7AF99385B836@sourceware.org> (raw) https://gcc.gnu.org/g:88ada5c051c49a1f03602df747a9e6dae675c68e commit r12-2004-g88ada5c051c49a1f03602df747a9e6dae675c68e Author: Richard Biener <rguenther@suse.de> Date: Mon Jul 5 12:00:17 2021 +0200 Do not set both LOOP_C_INFINITE and LOOP_C_FINITE on vectorized loop The setting is likely a typo and was meant to affect the scalar version but even there LOOP_C_INFINITE is at most an optimization to the niter analysis. Clearly setting it on the vectorized loop which we just versioned to be _not_ infinite is bogus so the following change removes this. 2021-07-05 Richard Biener <rguenther@suse.de> * tree-vect-loop-manip.c (vect_loop_versioning): Do not set LOOP_C_INFINITE on the vectorized loop. Diff: --- gcc/tree-vect-loop-manip.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c index 012f48bd487..2909e8a0fc3 100644 --- a/gcc/tree-vect-loop-manip.c +++ b/gcc/tree-vect-loop-manip.c @@ -3597,8 +3597,6 @@ vect_loop_versioning (loop_vec_info loop_vinfo, niter information which is copied from the original loop. */ gcc_assert (loop_constraint_set_p (loop, LOOP_C_FINITE)); vect_free_loop_info_assumptions (nloop); - /* And set constraint LOOP_C_INFINITE for niter analyzer. */ - loop_constraint_set (loop, LOOP_C_INFINITE); } if (LOCATION_LOCUS (vect_location.get_location_t ()) != UNKNOWN_LOCATION
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