https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116585
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:1d0cb3b5fca69b81e69cfdb4aea0eebc1ac04750 commit r15-3680-g1d0cb3b5fca69b81e69cfdb4aea0eebc1ac04750 Author: Richard Biener <rguent...@suse.de> Date: Wed Sep 18 09:52:55 2024 +0200 tree-optimization/116585 - SSA corruption with split_constant_offset split_constant_offset when looking through SSA defs can end up picking SSA leafs that are subject to abnormal coalescing. This can lead to downstream consumers to insert code based on the result (like from dataref analysis) in places that violate constraints for abnormal coalescing. It's best to not expand defs whose operands are subject to abnormal coalescing - and not either do something when a subexpression has operands like that already. PR tree-optimization/116585 * tree-data-ref.cc (split_constant_offset_1): When either operand is subject to abnormal coalescing do no further processing. * gcc.dg/torture/pr116585.c: New testcase.
