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| author | Alan Lawrence <alan.lawrence@arm.com> | 2014-11-13 16:27:37 +0000 |
|---|---|---|
| committer | Alan Lawrence <alalaw01@gcc.gnu.org> | 2014-11-13 16:27:37 +0000 |
| commit | cf7aa6a3b79ac25df266aa4fcfe6c059243602aa (patch) | |
| tree | 6780c5d8c1b45da220db82c4a0f897afcd467d9a /gcc/tree-vect-stmts.c | |
| parent | 557be5a8767902f204e8afa04551a387eac33a26 (diff) | |
| download | gcc-cf7aa6a3b79ac25df266aa4fcfe6c059243602aa.zip gcc-cf7aa6a3b79ac25df266aa4fcfe6c059243602aa.tar.gz gcc-cf7aa6a3b79ac25df266aa4fcfe6c059243602aa.tar.bz2 | |
[Vectorizer] Use a VEC_PERM_EXPR instead of VEC_RSHIFT_EXPR; expand appropriate VEC_PERM_EXPRs using vec_shr_optab
* optabs.c (can_vec_perm_p): Update comment, does not consider vec_shr.
(shift_amt_for_vec_perm_mask): New.
(expand_vec_perm_1): Use vec_shr_optab if second vector is const0_rtx
and mask appropriate.
* tree-vect-loop.c (calc_vec_perm_mask_for_shift): New.
(have_whole_vector_shift): New.
(vect_model_reduction_cost): Call have_whole_vector_shift instead of
looking for vec_shr_optab.
(vect_create_epilog_for_reduction): Likewise; also rename local variable
have_whole_vector_shift to reduce_with_shift; output VEC_PERM_EXPRs
instead of VEC_RSHIFT_EXPRs.
* tree-vect-stmts.c (vect_gen_perm_mask_checked): Extend comment.
From-SVN: r217509
Diffstat (limited to 'gcc/tree-vect-stmts.c')
| -rw-r--r-- | gcc/tree-vect-stmts.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c index 3d40f0f..f877fea 100644 --- a/gcc/tree-vect-stmts.c +++ b/gcc/tree-vect-stmts.c @@ -5495,7 +5495,8 @@ vect_gen_perm_mask_any (tree vectype, const unsigned char *sel) return mask_vec; } -/* Checked version of vect_gen_perm_mask_any. Asserts can_vec_perm_p. */ +/* Checked version of vect_gen_perm_mask_any. Asserts can_vec_perm_p, + i.e. that the target supports the pattern _for arbitrary input vectors_. */ tree vect_gen_perm_mask_checked (tree vectype, const unsigned char *sel) |