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| author | Richard Biener <rguenther@suse.de> | 2017-07-21 07:13:57 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-07-21 07:13:57 +0000 |
| commit | 1dae21ad9797ae5cb77db3f2d85e854f3ae121f4 (patch) | |
| tree | d1d367b6f08688e28fef90a8aa1c98a4fcfee6cc /gcc/tree-vect-loop.c | |
| parent | ac48cd5e89b1e50b1612c9473cf1f4a59b46ed0a (diff) | |
| download | gcc-1dae21ad9797ae5cb77db3f2d85e854f3ae121f4.zip gcc-1dae21ad9797ae5cb77db3f2d85e854f3ae121f4.tar.gz gcc-1dae21ad9797ae5cb77db3f2d85e854f3ae121f4.tar.bz2 | |
re PR tree-optimization/81303 (410.bwaves regression caused by r249919)
2016-07-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/81303
* tree-vect-loop.c (vect_estimate_min_profitable_iters): Take
into account prologue and epilogue iterations when raising
min_profitable_iters to sth at least covering one vector iteration.
From-SVN: r250416
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 7bae416..64d8699 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -3702,8 +3702,9 @@ vect_estimate_min_profitable_iters (loop_vec_info loop_vinfo, " Calculated minimum iters for profitability: %d\n", min_profitable_iters); - min_profitable_iters = - min_profitable_iters < vf ? vf : min_profitable_iters; + /* We want the vectorized loop to execute at least once. */ + if (min_profitable_iters < (vf + peel_iters_prologue + peel_iters_epilogue)) + min_profitable_iters = vf + peel_iters_prologue + peel_iters_epilogue; if (dump_enabled_p ()) dump_printf_loc (MSG_NOTE, vect_location, |