https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106751
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:4db6e1bf2f1647521dcd709bc3673f565fc327a5 commit r12-9128-g4db6e1bf2f1647521dcd709bc3673f565fc327a5 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. (cherry picked from commit ddcaa60983b50378bde1b7e327086fe0ce101795)
