https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113070
--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Alex Coplan <acop...@gcc.gnu.org>: https://gcc.gnu.org/g:e0374b028a665a2ea8d6eb2b4e5862774e9e85c2 commit r14-8358-ge0374b028a665a2ea8d6eb2b4e5862774e9e85c2 Author: Alex Coplan <alex.cop...@arm.com> Date: Thu Jan 11 16:17:37 2024 +0000 rtl-ssa: Run finalize_new_accesses forwards [PR113070] The next patch in this series exposes an interface for creating new uses in RTL-SSA. The intent is that new user-created uses can consume new user-created defs in the same change group. This is so that we can correctly update uses of memory when inserting a new store pair insn in the aarch64 load/store pair fusion pass (the affected uses need to consume the new store pair insn). As it stands, finalize_new_accesses is called as part of the backwards insn placement loop within change_insns, but if we want new uses to be able to depend on new defs in the same change group, we need finalize_new_accesses to be called on earlier insns first. This is so that when we process temporary uses and turn them into permanent uses, we can follow the last_def link on the temporary def to ensure we end up with a permanent use consuming a permanent def. gcc/ChangeLog: PR target/113070 * rtl-ssa/changes.cc (function_info::change_insns): Split out the call to finalize_new_accesses from the backwards placement loop, run it forwards in a separate loop.
