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| author | Richard Biener <rguenther@suse.de> | 2023-02-14 14:51:48 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-02-14 16:18:57 +0100 |
| commit | e72c2770b6d913c82a56d45a306c4cb2ed88fba5 (patch) | |
| tree | 064d8ce01b29c10c8d578295c2a58e4210a60f6b /libgomp | |
| parent | 1434eee54e57ad4839c0697f1294f9e8fe0a3044 (diff) | |
| download | gcc-e72c2770b6d913c82a56d45a306c4cb2ed88fba5.zip gcc-e72c2770b6d913c82a56d45a306c4cb2ed88fba5.tar.gz gcc-e72c2770b6d913c82a56d45a306c4cb2ed88fba5.tar.bz2 | |
Improve VN PHI hash table handling
The hash function of PHIs is weak since we want to be able to CSE
them even across basic-blocks in some cases. The following avoids
weakening the hash for cases we are never going to CSE, reducing
the number of collisions and avoiding redundant work in the
hash and equality functions.
* tree-ssa-sccvn.cc (vn_phi_compute_hash): Key skipping
basic block index hashing on the availability of ->cclhs.
(vn_phi_eq): Avoid re-doing sanity checks for CSE but
rely on ->cclhs availability.
(vn_phi_lookup): Set ->cclhs only when we are eventually
going to CSE the PHI.
(vn_phi_insert): Likewise.
Diffstat (limited to 'libgomp')
0 files changed, 0 insertions, 0 deletions