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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-13 09:03:07 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-11-13 09:03:07 +0000 |
| commit | e4020b28d02a00d478a3a769855ae6a8d9cc6b26 (patch) | |
| tree | 8795d85f2e900a5d8c52ef2b19865109b138051a /gcc/tree-vectorizer.h | |
| parent | 3f446c27195400aea98ff9c37ed2651ab54f7c03 (diff) | |
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Don't assign a cost to vectorizable_assignment
vectorizable_assignment handles true SSA-to-SSA copies (which hopefully
we don't see in practice) and no-op conversions that are required
to maintain correct gimple, such as changes between signed and
unsigned types. These cases shouldn't generate any code and so
shouldn't count against either the scalar or vector costs.
Later patches test this, but it seemed worth splitting out.
2019-11-13 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* tree-vectorizer.h (vect_nop_conversion_p): Declare.
* tree-vect-stmts.c (vect_nop_conversion_p): New function.
(vectorizable_assignment): Don't add a cost for nop conversions.
* tree-vect-loop.c (vect_compute_single_scalar_iteration_cost):
Likewise.
* tree-vect-slp.c (vect_bb_slp_scalar_cost): Likewise.
From-SVN: r278122
Diffstat (limited to 'gcc/tree-vectorizer.h')
| -rw-r--r-- | gcc/tree-vectorizer.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h index e556e0e..e93ccc7 100644 --- a/gcc/tree-vectorizer.h +++ b/gcc/tree-vectorizer.h @@ -1650,6 +1650,7 @@ extern tree vect_get_vec_def_for_stmt_copy (vec_info *, tree); extern bool vect_transform_stmt (stmt_vec_info, gimple_stmt_iterator *, slp_tree, slp_instance); extern void vect_remove_stores (stmt_vec_info); +extern bool vect_nop_conversion_p (stmt_vec_info); extern opt_result vect_analyze_stmt (stmt_vec_info, bool *, slp_tree, slp_instance, stmt_vector_for_cost *); extern void vect_get_load_cost (stmt_vec_info, int, bool, |