https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117938
--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:355475e332f264107ef07555f7c379be7b85942f commit r15-6551-g355475e332f264107ef07555f7c379be7b85942f Author: Richard Sandiford <richard.sandif...@arm.com> Date: Fri Jan 3 18:12:07 2025 +0000 rtlanal: Treat writes to sp as also writing to memory [PR117938] This PR was about a case in which late-combine moved a stack deallocation across an earlier stack access. This was possible because the deallocation was missing the RTL-SSA equivalent of a vop, which in turn was because rtl_properties didn't treat the deallocation as writing to memory. I think the bug was ultimately there. gcc/ PR rtl-optimization/117938 * rtlanal.cc (rtx_properties::try_to_add_dest): Treat writes to the stack pointer as also writing to memory. gcc/testsuite/ PR rtl-optimization/117938 * gcc.dg/torture/pr117938.c: New test.
