https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99912
--- Comment #8 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:d8e1f1d24179690fd9c0f63c27b12e030010d9ea commit r12-155-gd8e1f1d24179690fd9c0f63c27b12e030010d9ea Author: Richard Biener <rguent...@suse.de> Date: Wed Apr 7 12:09:44 2021 +0200 tree-optimization/99912 - schedule DSE before SRA For the testcase in the PR the main SRA pass is unable to do some important scalarizations because dead stores of addresses make the candiate variables disqualified. The following patch adds another DSE pass before SRA forming a DCE/DSE pair and moves the DSE pass that is currently closely after SRA up to after the next DCE pass, forming another DCE/DSE pair now residing after PRE. 2021-04-07 Richard Biener <rguent...@suse.de> PR tree-optimization/99912 * passes.def (pass_all_optimizations): Add pass_dse before the first pass_dce, move the first pass_dse before the pass_dce following pass_pre. * gcc.dg/tree-ssa/ldist-33.c: Disable PRE and LIM. * gcc.dg/tree-ssa/pr96789.c: Adjust dump file scanned. * gcc.dg/tree-ssa/ssa-dse-28.c: Likewise. * gcc.dg/tree-ssa/ssa-dse-29.c: Likewise.
