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| author | Richard Biener <rguenther@suse.de> | 2023-03-23 14:52:01 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-03-23 17:22:02 +0100 |
| commit | 41ade3399bd1ec9927be1bb818965831232eda4b (patch) | |
| tree | aa461d90bda457d9bde553ee06f28ef0962de892 /gcc/fold-const.cc | |
| parent | 25979b6761516b9039004385e08141e0925e1a17 (diff) | |
| download | gcc-41ade3399bd1ec9927be1bb818965831232eda4b.zip gcc-41ade3399bd1ec9927be1bb818965831232eda4b.tar.gz gcc-41ade3399bd1ec9927be1bb818965831232eda4b.tar.bz2 | |
tree-optimization/107569 - avoid wrecking earlier folding in FRE/PRE
The following avoids picking up dead code left over from folding
during FRE/PRE, effectively undoing propagations.
PR tree-optimization/107569
* tree-ssa-sccvn.cc (eliminate_dom_walker::eliminate_stmt):
Do not push SSA names with zero uses as available leader.
(process_bb): Likewise.
* g++.dg/opt/pr107569.C: New testcase.
Diffstat (limited to 'gcc/fold-const.cc')
0 files changed, 0 insertions, 0 deletions