public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r14-75] Remove special-cased edges when solving copies
@ 2023-04-19 12:15 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2023-04-19 12:15 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:6702fdcdf8b8c8ed27954972bb10b2464f4912fb
commit r14-75-g6702fdcdf8b8c8ed27954972bb10b2464f4912fb
Author: Richard Biener <rguenther@suse.de>
Date: Wed Mar 15 08:46:04 2023 +0100
Remove special-cased edges when solving copies
The following makes sure to remove the copy edges we ignore or
need to special-case only once.
* tree-ssa-structalias.cc (solve_graph): Remove self-copy
edges, remove edges from escaped after special-casing them.
Diff:
---
gcc/tree-ssa-structalias.cc | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/gcc/tree-ssa-structalias.cc b/gcc/tree-ssa-structalias.cc
index 4f350bfbfc0..39c342fae41 100644
--- a/gcc/tree-ssa-structalias.cc
+++ b/gcc/tree-ssa-structalias.cc
@@ -2873,19 +2873,22 @@ solve_graph (constraint_graph_t graph)
}
/* Don't try to propagate to ourselves. */
if (to == i)
- continue;
-
- bitmap tmp = get_varinfo (to)->solution;
- bool flag = false;
-
- /* If we propagate from ESCAPED use ESCAPED as
- placeholder. */
+ {
+ to_remove = j;
+ continue;
+ }
+ /* Early node unification can lead to edges from
+ escaped - remove them. */
if (i == eff_escaped_id)
- flag = bitmap_set_bit (tmp, escaped_id);
- else
- flag = bitmap_ior_into (tmp, pts);
+ {
+ to_remove = j;
+ if (bitmap_set_bit (get_varinfo (to)->solution,
+ escaped_id))
+ bitmap_set_bit (changed, to);
+ continue;
+ }
- if (flag)
+ if (bitmap_ior_into (get_varinfo (to)->solution, pts))
bitmap_set_bit (changed, to);
}
if (to_remove != ~0U)
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-04-19 12:15 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-04-19 12:15 [gcc r14-75] Remove special-cased edges when solving copies Richard Biener
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).