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| author | Ira Rosen <ira.rosen@linaro.org> | 2011-09-15 10:46:39 +0000 |
|---|---|---|
| committer | Ira Rosen <irar@gcc.gnu.org> | 2011-09-15 10:46:39 +0000 |
| commit | e0521991e43afe844ccb206889b54f96890cd86f (patch) | |
| tree | 8a5f476c165afd0e2738bb275d1440f1422fb7dc /gcc/tree-vect-data-refs.c | |
| parent | 4178104336ad9164e960a27477dbd974fb835b48 (diff) | |
| download | gcc-e0521991e43afe844ccb206889b54f96890cd86f.zip gcc-e0521991e43afe844ccb206889b54f96890cd86f.tar.gz gcc-e0521991e43afe844ccb206889b54f96890cd86f.tar.bz2 | |
tree-vect-data-refs.c (vect_analyze_data_ref_dependence): Allow read-after-read dependencies in basic block SLP.
* tree-vect-data-refs.c (vect_analyze_data_ref_dependence): Allow
read-after-read dependencies in basic block SLP.
From-SVN: r178880
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index e4d32e9..33ccf34 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -607,6 +607,11 @@ vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr, if (vect_check_interleaving (dra, drb)) return false; + /* Read-read is OK (we need this check here, after checking for + interleaving). */ + if (DR_IS_READ (dra) && DR_IS_READ (drb)) + return false; + if (vect_print_dump_info (REPORT_DR_DETAILS)) { fprintf (vect_dump, "can't determine dependence between "); |