[Bug tree-optimization/95295] g++ produces incorrect code with -O3 for loops
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon May 25 11:39:42 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95295
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:4acca1c0635dfa43cd8c4bfe2b22e17909fc23a3
commit r11-609-g4acca1c0635dfa43cd8c4bfe2b22e17909fc23a3
Author: Richard Biener <rguenther@suse.de>
Date: Mon May 25 10:09:44 2020 +0200
tree-optimization/95295 - fix wrong-code with SM
We failed to compare the rematerialized store values when merging
paths after walking PHIs.
2020-05-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/95295
* tree-ssa-loop-im.c (sm_seq_valid_bb): Compare remat stores
RHSes and drop to full sm_other if they are not equal.
* gcc.dg/torture/pr95295-1.c: New testcase.
* gcc.dg/torture/pr95295-2.c: Likewise.
* gcc.dg/torture/pr95283.c: Likewise.
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