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| author | Richard Biener <rguenther@suse.de> | 2021-05-03 09:17:55 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-05-03 15:11:03 +0200 |
| commit | ed3c43224cc4e378dbab066122bc63536ccb1276 (patch) | |
| tree | 2165a02f756b5ccf068014f670bfc7fe4044bcea /gcc/expr.c | |
| parent | 3f570621352970945db657455e0570208ea2d70e (diff) | |
| download | gcc-ed3c43224cc4e378dbab066122bc63536ccb1276.zip gcc-ed3c43224cc4e378dbab066122bc63536ccb1276.tar.gz gcc-ed3c43224cc4e378dbab066122bc63536ccb1276.tar.bz2 | |
Perform reverse program order walk for GIMPLE DSE
The following changes the post-dominator domwalk done by GIMPLE DSE
to a reverse program order walk. This enables 2% more stmts do be
DSEd during bootstrap and in particular for testcases like the one
added where it is important to visit post dominators in a particular
order.
2021-05-03 Richard Biener <rguenther@suse.de>
* tree-ssa-dse.c: Do not include domwalk.h but cfganal.h.
(dse_dom_walker): Remove.
(dse_dom_walker::dse_optimize_stmt): Rename...
(dse_optimize_stmt): ... to this, pass in live_bytes sbitmap.
(dse_dom_walker::before_dom_children): Inline ...
(pass_dse::execute): ... here. Perform a reverse program
order walk.
* gcc.dg/tree-ssa/ssa-dse-41.c: New testcase.
Diffstat (limited to 'gcc/expr.c')
0 files changed, 0 insertions, 0 deletions