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| author | Richard Biener <rguenther@suse.de> | 2013-04-03 08:03:33 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2013-04-03 08:03:33 +0000 |
| commit | e6c9d234044bae3de1941cb7d654dc9d3425fd1b (patch) | |
| tree | 225ecff6a61a2a168f67c5dc2f82d15fbac83f82 /gcc/tree-vect-data-refs.c | |
| parent | 9362a03b8760f7ea986af5b0b22a5b80bed9d05d (diff) | |
| download | gcc-e6c9d234044bae3de1941cb7d654dc9d3425fd1b.zip gcc-e6c9d234044bae3de1941cb7d654dc9d3425fd1b.tar.gz gcc-e6c9d234044bae3de1941cb7d654dc9d3425fd1b.tar.bz2 | |
re PR tree-optimization/56812 (Simple loop is not SLP-vectorized after r196872)
2013-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/56812
* tree-vect-data-refs.c (vect_slp_analyze_data_ref_dependence):
DRs of the same interleaving chain are independent.
* g++.dg/vect/slp-pr56812.cc: New testcase.
From-SVN: r197390
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 4ef9ba8..128e874 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -484,6 +484,13 @@ vect_slp_analyze_data_ref_dependence (struct data_dependence_relation *ddr) if (DR_IS_READ (dra) && DR_IS_READ (drb)) return false; + /* If dra and drb are part of the same interleaving chain consider + them independent. */ + if (STMT_VINFO_GROUPED_ACCESS (vinfo_for_stmt (DR_STMT (dra))) + && (GROUP_FIRST_ELEMENT (vinfo_for_stmt (DR_STMT (dra))) + == GROUP_FIRST_ELEMENT (vinfo_for_stmt (DR_STMT (drb))))) + return false; + /* Unknown data dependence. */ if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know) { |