https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97567
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Andrew Macleod <amacl...@gcc.gnu.org>: https://gcc.gnu.org/g:7d26a337bfa1135d95caa3c213e82f2a97f18a01 commit r11-4862-g7d26a337bfa1135d95caa3c213e82f2a97f18a01 Author: Andrew MacLeod <amacl...@redhat.com> Date: Mon Nov 9 19:38:22 2020 -0500 Fix logical_combine OR operation. Again. The original fix was incorrect and results in loss of opportunities. Revert the original fix. When processing logical chains, do not follow chains outside of the current basic block. Use the import value instead. gcc/ PR tree-optimization/97567 * gimple-range-gori.cc: (gori_compute::logical_combine): False OR operations should intersect the 2 results. (gori_compute::compute_logical_operands_in_chain): If def chains are outside the current basic block, don't follow them. gcc/testsuite/ * gcc.dg/pr97567-2.c: New.
