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| author | Richard Biener <rguenther@suse.de> | 2021-10-21 10:24:03 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-10-21 11:21:18 +0200 |
| commit | 7878981f1d44b4c9bb6c4a3137b37f06c725b73d (patch) | |
| tree | 77986f7420d31ccd5d245c96c473a2354eb5ce82 | |
| parent | e633f82fb71817f3232688869c1eb59f60eb78ca (diff) | |
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tree-optimization/102847 - properly cost VMAT_INVARIANT loads
The following adds proper costing of VMAT_INVARIANT loads, avoiding
to ask the target about the cost of an unsupported vector load cost
which we won't emit anyway.
2021-10-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/102847
* tree-vect-stmts.c (vect_model_load_cost): Explicitely
handle VMAT_INVARIANT as a splat in the prologue.
| -rw-r--r-- | gcc/tree-vect-stmts.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c index 9cbc1af..8f52745 100644 --- a/gcc/tree-vect-stmts.c +++ b/gcc/tree-vect-stmts.c @@ -1191,6 +1191,13 @@ vect_model_load_cost (vec_info *vinfo, ncopies * assumed_nunits, scalar_load, stmt_info, 0, vect_body); } + else if (memory_access_type == VMAT_INVARIANT) + { + /* Invariant loads will ideally be hoisted and splat to a vector. */ + prologue_cost += record_stmt_cost (cost_vec, 1, + scalar_to_vec, stmt_info, 0, + vect_prologue); + } else vect_get_load_cost (vinfo, stmt_info, ncopies, alignment_support_scheme, misalignment, first_stmt_p, |