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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2018-01-02 18:27:05 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2018-01-02 18:27:05 +0000 |
| commit | d980067b1e9394b2b8482b3fc888ac5e8e3ebe59 (patch) | |
| tree | ebde117c5d31c80df9b86ffd24c029b7dfc3f5db /gcc/tree-vect-loop.c | |
| parent | 736d0f28783f12fa042892bc186866dd5101088f (diff) | |
| download | gcc-d980067b1e9394b2b8482b3fc888ac5e8e3ebe59.zip gcc-d980067b1e9394b2b8482b3fc888ac5e8e3ebe59.tar.gz gcc-d980067b1e9394b2b8482b3fc888ac5e8e3ebe59.tar.bz2 | |
Use explicit encodings for simple permutes
This patch makes users of vec_perm_builders use the compressed encoding
where possible. This means that they work with variable-length vectors.
2018-01-02 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* optabs.c (expand_vec_perm_var): Use an explicit encoding for
the broadcast of the low byte.
(expand_mult_highpart): Use an explicit encoding for the permutes.
* optabs-query.c (can_mult_highpart_p): Likewise.
* tree-vect-loop.c (calc_vec_perm_mask_for_shift): Likewise.
* tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
(vectorizable_bswap): Likewise.
* tree-vect-data-refs.c (vect_grouped_store_supported): Use an
explicit encoding for the power-of-2 permutes.
(vect_permute_store_chain): Likewise.
(vect_grouped_load_supported): Likewise.
(vect_permute_load_chain): Likewise.
From-SVN: r256097
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index fa33c7d..31a396b 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -3715,8 +3715,10 @@ static void calc_vec_perm_mask_for_shift (unsigned int offset, unsigned int nelt, vec_perm_builder *sel) { - sel->new_vector (nelt, nelt, 1); - for (unsigned int i = 0; i < nelt; i++) + /* The encoding is a single stepped pattern. Any wrap-around is handled + by vec_perm_indices. */ + sel->new_vector (nelt, 1, 3); + for (unsigned int i = 0; i < 3; i++) sel->quick_push (i + offset); } |