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| author | Richard Biener <rguenther@suse.de> | 2018-01-12 11:43:13 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-01-12 11:43:13 +0000 |
| commit | c803b2a92822c57abf5464deaf5be5c31d8a4692 (patch) | |
| tree | 4a8bf4ce632240e45cdadcf69318f73f17a0f232 /gcc/targhooks.h | |
| parent | 46336a0eab790e4f94dd7e7ecf9339a884c44746 (diff) | |
re PR target/80846 (auto-vectorized AVX2 horizontal sum should narrow to 128b right away, to be more efficient for Ryzen and Intel)
2018-01-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/80846
* target.def (split_reduction): New target hook.
* targhooks.c (default_split_reduction): New function.
* targhooks.h (default_split_reduction): Declare.
* tree-vect-loop.c (vect_create_epilog_for_reduction): If the
target requests first reduce vectors by combining low and high
parts.
* tree-vect-stmts.c (vect_gen_perm_mask_any): Adjust.
(get_vectype_for_scalar_type_and_size): Export.
* tree-vectorizer.h (get_vectype_for_scalar_type_and_size): Declare.
* doc/tm.texi.in (TARGET_VECTORIZE_SPLIT_REDUCTION): Document.
* doc/tm.texi: Regenerate.
i386/
* config/i386/i386.c (ix86_split_reduction): Implement
TARGET_VECTORIZE_SPLIT_REDUCTION.
* gcc.target/i386/pr80846-1.c: New testcase.
* gcc.target/i386/pr80846-2.c: Likewise.
From-SVN: r256576
Diffstat (limited to 'gcc/targhooks.h')
| -rw-r--r-- | gcc/targhooks.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/targhooks.h b/gcc/targhooks.h index b4a0cd0db3a..f55fde773d1 100644 --- a/gcc/targhooks.h +++ b/gcc/targhooks.h @@ -108,6 +108,7 @@ default_builtin_support_vector_misalignment (machine_mode mode, const_tree, int, bool); extern machine_mode default_preferred_simd_mode (scalar_mode mode); +extern machine_mode default_split_reduction (machine_mode); extern void default_autovectorize_vector_sizes (vector_sizes *); extern opt_machine_mode default_get_mask_mode (poly_uint64, poly_uint64); extern void *default_init_cost (struct loop *); |