https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113237
--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Tamar Christina <tnfch...@gcc.gnu.org>: https://gcc.gnu.org/g:99c0a540d6689ede068f9ba98af6f38c3cd71362 commit r14-7196-g99c0a540d6689ede068f9ba98af6f38c3cd71362 Author: Tamar Christina <tamar.christ...@arm.com> Date: Fri Jan 12 15:25:58 2024 +0000 middle-end: thread through existing LCSSA variable for alternative exits too [PR113237] Builing on top of the previous patch, similar to when we have a single exit if we have a case where all exits are considered early exits and there are existing non virtual phi then in order to maintain LCSSA we have to use the existing PHI variables. We can't simply clear them and just rebuild them because the order of the PHIs in the main exit must match the original exit for when we add the skip_epilog guard. But the infrastructure is already in place to maintain them, we just have to use the right value. gcc/ChangeLog: PR tree-optimization/113237 * tree-vect-loop-manip.cc (slpeel_tree_duplicate_loop_to_edge_cfg): Use existing LCSSA variable for exit when all exits are early break. gcc/testsuite/ChangeLog: PR tree-optimization/113237 * gcc.dg/vect/vect-early-break_98-pr113237.c: New test.
