https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126925
--- Comment #2 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:8ff8114e4448307f27e38fbdb98028283ab64f1c commit r17-3363-g8ff8114e4448307f27e38fbdb98028283ab64f1c Author: Richard Biener <[email protected]> Date: Tue Aug 18 09:49:12 2026 +0200 tree-optimization/126925 - missed folding causes IVOPTs crash When we fail to simplify an IV candidate step to zero SCEV might still have simplified the before/after candidate to an IV with zero step. Avoid crashing in such situation. PR tree-optimization/126925 * tree-ssa-loop-ivopts.cc (create_new_iv): Avoid crashing if the use IV is invariant. * gcc.dg/torture/pr126925.c: New testcase.
