https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106751
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:ddcaa60983b50378bde1b7e327086fe0ce101795 commit r13-4739-gddcaa60983b50378bde1b7e327086fe0ce101795 Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Dec 16 10:19:22 2022 +0100 loop-invariant: Split preheader edge if the preheader bb ends with jump [PR106751] The RTL loop passes only request simple preheaders, but don't require fallthru preheaders, while move_invariant_reg apparently assumes the latter, that it can just append instruction(s) to the end of the preheader basic block. The following patch fixes that by splitting the preheader edge if the preheader bb ends with a JUMP_INSN (asm goto in this case). Without that we get control flow in the middle of a bb. 2022-12-16 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/106751 * loop-invariant.cc (move_invariant_reg): If preheader bb ends with a JUMP_INSN, split the preheader edge and emit invariants into the new preheader basic block. * gcc.c-torture/compile/pr106751.c: New test.
