https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108263
--- Comment #2 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:4fb639a7fee5df32a2d1e7afa40fdf31d280464b commit r13-4974-g4fb639a7fee5df32a2d1e7afa40fdf31d280464b Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Jan 3 12:12:35 2023 +0100 cfgrtl: Don't try to redirect asm goto to EXIT [PR108263] The following testcase distilled from Linux kernel on ppc64le ICEs, because fixup_reorder_chain sees a bb with a single fallthru edge falling into a bb with simple return and decides to redirect that fallthru edge to EXIT. That is possible if the bb ending in the fallthru edge doesn't end with a jump or ends with a normal unconditional jump, but not when the bb ends with asm goto which can despite a single fallthru have multiple labels to the fallthrough basic block. The following patch makes sure we never try to redirect such cases to EXIT. 2023-01-03 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/108263 * cfgrtl.cc (fixup_reorder_chain): Avoid trying to redirect asm goto to EXIT. * gcc.dg/pr108263.c: New test.
