https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122016
--- Comment #7 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:52b53cfb5392257536fce8dd22ea60412ceaee7d commit r16-4020-g52b53cfb5392257536fce8dd22ea60412ceaee7d Author: Richard Biener <[email protected]> Date: Mon Sep 22 10:14:31 2025 +0200 tree-optimization/122016 - PRE insertion breaks abnormal coalescing When PRE asks VN to simplify a NARY but not insert, that bypasses the abnormal guard in maybe_push_res_to_seq and we blindly accept new uses of abnormals. The following fixes this. PR tree-optimization/122016 * tree-ssa-sccvn.cc (vn_nary_simplify): Do not use the simplified expression when it references abnormals. * gcc.dg/torture/pr122016.c: New testcase.
