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| author | Richard Biener <rguenther@suse.de> | 2016-07-27 11:10:25 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-07-27 11:10:25 +0000 |
| commit | dd583351acbf823a19af80146b1655e60f4b5ca4 (patch) | |
| tree | eb5cfe7dfe647118733f24e7d8333a45a16aeb35 /gcc/tree-vect-data-refs.c | |
| parent | 5693aed09427b490d0fb9f17d8b04fecf81d92bd (diff) | |
| download | gcc-dd583351acbf823a19af80146b1655e60f4b5ca4.zip gcc-dd583351acbf823a19af80146b1655e60f4b5ca4.tar.gz gcc-dd583351acbf823a19af80146b1655e60f4b5ca4.tar.bz2 | |
re PR tree-optimization/72517 (436.cactusADM: More than 40% regression in O3 and Ofast on AMD bdver4 m/c.)
2016-07-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/72517
* tree-vect-data-refs.c (vect_analyze_data_ref_dependences):
Revert change to not compute read-read dependences.
From-SVN: r238783
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 9a5408e..e908c86 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -473,9 +473,10 @@ vect_analyze_data_ref_dependences (loop_vec_info loop_vinfo, int *max_vf) .create (LOOP_VINFO_DATAREFS (loop_vinfo).length () * LOOP_VINFO_DATAREFS (loop_vinfo).length ()); LOOP_VINFO_NO_DATA_DEPENDENCIES (loop_vinfo) = true; + /* We need read-read dependences to compute STMT_VINFO_SAME_ALIGN_REFS. */ if (!compute_all_dependences (LOOP_VINFO_DATAREFS (loop_vinfo), &LOOP_VINFO_DDRS (loop_vinfo), - LOOP_VINFO_LOOP_NEST (loop_vinfo), false)) + LOOP_VINFO_LOOP_NEST (loop_vinfo), true)) return false; FOR_EACH_VEC_ELT (LOOP_VINFO_DDRS (loop_vinfo), i, ddr) |