diff options
| author | Richard Biener <rguenther@suse.de> | 2022-06-29 14:55:43 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-06-30 10:39:09 +0200 |
| commit | aea329432b8e405668861bbe0cd2662a80508c45 (patch) | |
| tree | 19a869a65d1062f7bab9be2fbd2efbc45d501ef1 /gcc/domwalk.h | |
| parent | 721aa2cc44d143e49a704bc8238b3d0d5f750a49 (diff) | |
| download | gcc-aea329432b8e405668861bbe0cd2662a80508c45.zip gcc-aea329432b8e405668861bbe0cd2662a80508c45.tar.gz gcc-aea329432b8e405668861bbe0cd2662a80508c45.tar.bz2 | |
Avoid computing RPO for update_ssa
At some point when domwalk got the ability to use RPO for ordering
dominator children we carefully avoided update_ssa eating the cost
of RPO compute. Unfortunately some later consolidation of CTORs
lost this again so the following makes this explicit via a special
value to the bb_index_to_rpo argument of domwalk, speeding up
update_ssa again.
* domwalk.h (dom_walker::dom_walker): Update comment to
reflect reality and new special argument value for
bb_index_to_rpo.
* domwalk.cc (dom_walker::dom_walker): Recognize -1
bb_index_to_rpo.
* tree-into-ssa.cc
(rewrite_update_dom_walker::rewrite_update_dom_walker): Tell
dom_walker to not use RPO.
Diffstat (limited to 'gcc/domwalk.h')
| -rw-r--r-- | gcc/domwalk.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/domwalk.h b/gcc/domwalk.h index 17ddc1b..b71d294 100644 --- a/gcc/domwalk.h +++ b/gcc/domwalk.h @@ -62,8 +62,9 @@ public: /* You can provide a mapping of basic-block index to RPO if you have that readily available or you do multiple walks. If you - specify NULL as BB_INDEX_TO_RPO dominator children will not be - walked in RPO order. */ + specify NULL as BB_INDEX_TO_RPO this mapping will be computed + lazily at walk time. If you specify -1 dominator children will + not be walked in RPO order. */ dom_walker (cdi_direction direction, enum reachability = ALL_BLOCKS, int *bb_index_to_rpo = NULL); |