https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107009
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Aldy Hernandez <al...@gcc.gnu.org>: https://gcc.gnu.org/g:2460f7cdef7ef9c971de79271afc0db73687a272 commit r13-2876-g2460f7cdef7ef9c971de79271afc0db73687a272 Author: Aldy Hernandez <al...@redhat.com> Date: Fri Sep 23 19:47:33 2022 +0200 Set ranges from unreachable edges for all known ranges. In the conversion of DOM+evrp to DOM+ranger, we missed that evrp was exporting ranges for unreachable edges for all SSA names for which we have ranges for. Instead we have only been exporting ranges for the SSA name in the final conditional to the BB involving the unreachable edge. This patch adjusts adjusts DOM to iterate over the exports, similarly to what evrp was doing. Note that I also noticed that we don't calculate the nonzero bit mask for op1, when 0 = op1 & MASK. This isn't needed for this PR, since maybe_set_nonzero_bits() is chasing the definition and parsing the bitwise and on its own. However, I'll be adding the functionality for completeness sake, plus we could probably drop the maybe_set_nonzero_bits legacy call entirely. PR tree-optimization/107009 gcc/ChangeLog: * tree-ssa-dom.cc (dom_opt_dom_walker::set_global_ranges_from_unreachable_edges): Iterate over exports. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/pr107009.c: New test.
