https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102943
--- Comment #15 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:5ea1ce43b6070aaa94882e8b15f3340344aaa6b2 commit r12-4903-g5ea1ce43b6070aaa94882e8b15f3340344aaa6b2 Author: Aldy Hernandez <al...@redhat.com> Date: Wed Nov 3 08:23:25 2021 +0100 path solver: Only compute relations for imports. We are currently calculating implicit PHI relations for all PHI arguments. This creates unecessary work, as we only care about SSA names in the import bitmap. Similarly for inter-path relationals. We can avoid things not in the bitmap. Tested on x86-64 and ppc64le Linux with the usual regstrap. I also verified that the before and after number of threads was the same in a suite of .ii files from a bootstrap. gcc/ChangeLog: PR tree-optimization/102943 * gimple-range-path.cc (path_range_query::compute_phi_relations): Only compute relations for SSA names in the import list. (path_range_query::compute_outgoing_relations): Same. * gimple-range-path.h (path_range_query::import_p): New.
