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| author | Richard Biener <rguenther@suse.de> | 2021-04-06 13:20:44 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-04-06 14:20:28 +0200 |
| commit | e5c170e080399fb3d24a38bbfcd66bd4675abe53 (patch) | |
| tree | 877e3b0d3f265e1dd39d76e9804221341c64fc35 /gcc/tree-vect-loop.c | |
| parent | 671f9f5c0f04d859265f1f2da117baf5a75511ac (diff) | |
| download | gcc-e5c170e080399fb3d24a38bbfcd66bd4675abe53.zip gcc-e5c170e080399fb3d24a38bbfcd66bd4675abe53.tar.gz gcc-e5c170e080399fb3d24a38bbfcd66bd4675abe53.tar.bz2 | |
tree-optimization/99880 - avoid vectorizing irrelevant PHI backedge defs
This adds a relevancy check before trying to set the vector def of
a backedge in an unvectorized PHI.
2021-04-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/99880
* tree-vect-loop.c (maybe_set_vectorized_backedge_value): Only
set vectorized defs of relevant PHIs.
* gcc.dg/torture/pr99880.c: New testcase.
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 38d96fc..4e928c6 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -9148,6 +9148,7 @@ maybe_set_vectorized_backedge_value (loop_vec_info loop_vinfo, if (gphi *phi = dyn_cast <gphi *> (USE_STMT (use_p))) if (gimple_bb (phi)->loop_father->header == gimple_bb (phi) && (phi_info = loop_vinfo->lookup_stmt (phi)) + && STMT_VINFO_RELEVANT_P (phi_info) && VECTORIZABLE_CYCLE_DEF (STMT_VINFO_DEF_TYPE (phi_info)) && STMT_VINFO_REDUC_TYPE (phi_info) != FOLD_LEFT_REDUCTION && STMT_VINFO_REDUC_TYPE (phi_info) != EXTRACT_LAST_REDUCTION) |