https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106922
--- Comment #20 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:af611afe5fcc908a6678b5b205fb5af7d64fbcb2 commit r13-2817-gaf611afe5fcc908a6678b5b205fb5af7d64fbcb2 Author: Richard Biener <rguent...@suse.de> Date: Fri Sep 23 14:28:52 2022 +0200 tree-optimization/106922 - extend same-val clobber FRE The following extends the skipping of same valued stores to handle an arbitrary number of them as long as they are from the same value (which we now record). That's an obvious extension which allows to optimize the m_engaged member of std::optional more reliably. PR tree-optimization/106922 * tree-ssa-sccvn.cc (vn_reference_lookup_3): Allow an arbitrary number of same valued skipped stores. * g++.dg/torture/pr106922.C: New testcase.
