https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127310
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <[email protected]>: https://gcc.gnu.org/g:8c7c10e82d661785181f199fdc6b24890b30a54e commit r17-4161-g8c7c10e82d661785181f199fdc6b24890b30a54e Author: Richard Biener <[email protected]> Date: Fri Sep 11 10:31:58 2026 +0200 tree-optimization/127310 - ICE with lane-reducing reduction The following fixes an issue with wrong loop mask registering due to the costing code adjusting ncopies_for_cost before we use it for mask registering. PR tree-optimization/127310 * tree-vect-loop.cc (vectorizable_lane_reducing): Apply costing after registering loop masks. * gcc.dg/vect/vect-pr127310.c: New testcase.
