diff options
| author | Richard Biener <rguenther@suse.de> | 2024-09-18 12:41:25 +0200 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2024-09-19 16:26:28 +0200 |
| commit | 77bd23a3e247555ba427d01af8e5713934be8d5b (patch) | |
| tree | e6c1df8f2e40f68e6687b583fb60ade8f4b1c4bb /gcc/tree-vectorizer.h | |
| parent | d3a7302ec5985abcda561886cc724d388c7143cb (diff) | |
| download | gcc-77bd23a3e247555ba427d01af8e5713934be8d5b.zip gcc-77bd23a3e247555ba427d01af8e5713934be8d5b.tar.gz gcc-77bd23a3e247555ba427d01af8e5713934be8d5b.tar.bz2 | |
Fall back to single-lane SLP before falling back to no SLP
The following changes the fallback to disable SLP when any of the
discovered SLP instances failed to pass vectorization checking into
a fallback that emulates what no SLP would do with SLP - force
single-lane discovery for all instances.
The patch does not remove the final fallback to disable SLP but it
reduces the fallout from failing vectorization when any non-SLP
stmt survives analysis.
* tree-vectorizer.h (vect_analyze_slp): Add force_single_lane
parameter.
* tree-vect-slp.cc (vect_analyze_slp_instance): Remove
defaulting of force_single_lane.
(vect_build_slp_instance): Likewise. Pass down appropriate
force_single_lane.
(vect_analyze_slp): Add force_sigle_lane parameter and pass
it down appropriately.
(vect_slp_analyze_bb_1): Always do multi-lane SLP.
* tree-vect-loop.cc (vect_analyze_loop_2): Track two SLP
modes and adjust accordingly.
(vect_analyze_loop_1): Save the SLP mode when unrolling.
* gcc.dg/vect/vect-outer-slp-1.c: Adjust.
Diffstat (limited to 'gcc/tree-vectorizer.h')
| -rw-r--r-- | gcc/tree-vectorizer.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h index 699ae9e..53105f9 100644 --- a/gcc/tree-vectorizer.h +++ b/gcc/tree-vectorizer.h @@ -2538,7 +2538,7 @@ extern bool vect_transform_slp_perm_load (vec_info *, slp_tree, const vec<tree> unsigned * = nullptr, bool = false); extern bool vect_slp_analyze_operations (vec_info *); extern void vect_schedule_slp (vec_info *, const vec<slp_instance> &); -extern opt_result vect_analyze_slp (vec_info *, unsigned); +extern opt_result vect_analyze_slp (vec_info *, unsigned, bool); extern bool vect_make_slp_decision (loop_vec_info); extern void vect_detect_hybrid_slp (loop_vec_info); extern void vect_optimize_slp (vec_info *); |