| commit | b583a2940af90d03f535648fef111cb158933f7d | |
| author | Richard Biener <rguenther@suse.de> | |
| Wed, 4 Oct 2023 13:25:33 +0000 (4 15:25 +0200) | ||
| committer | Richard Biener <rguenther@suse.de> | |
| Thu, 5 Oct 2023 08:23:32 +0000 (5 10:23 +0200) | ||
| tree | b89485b5aea638dc9d07e7f464b9e6ba2fec9cae | treesnapshot (tar.gz zip) |
| parent | ffbd7c3d0fd1b9b10ef5a0f2b2e64bd234620167 | commitdiff |
Avoid left around copies when value-numbering BBs
The following makes sure to treat values whose definition we didn't
visit as available since those by definition must dominate the entry
of the region. That avoids unpropagated copies after if-conversion
and resulting SLP discovery fails (which doesn't handle plain copies).
* tree-ssa-sccvn.cc (rpo_elim::eliminate_avail): Not
visited value numbers are available itself.
The following makes sure to treat values whose definition we didn't
visit as available since those by definition must dominate the entry
of the region. That avoids unpropagated copies after if-conversion
and resulting SLP discovery fails (which doesn't handle plain copies).
* tree-ssa-sccvn.cc (rpo_elim::eliminate_avail): Not
visited value numbers are available itself.
| gcc/tree-ssa-sccvn.cc | diffblobblamehistory |