https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117327
--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Eric Botcazou <ebotca...@gcc.gnu.org>: https://gcc.gnu.org/g:0ea3dca7946a1bce072ae5f732a873ce6f207bee commit r14-10850-g0ea3dca7946a1bce072ae5f732a873ce6f207bee Author: Eric Botcazou <ebotca...@adacore.com> Date: Tue Oct 29 21:40:34 2024 +0100 Fix miscompilation of function containing __builtin_unreachable This is a wrong-code generation on the SPARC for a function containing a call to __builtin_unreachable caused by the delay slot scheduling pass, and more specifically the find_end_label function which has these lines: /* Otherwise, see if there is a label at the end of the function. If there is, it must be that RETURN insns aren't needed, so that is our return label and we don't have to do anything else. */ The comment was correct 20 years ago but no longer is nowadays in the presence of RTL epilogues and calls to __builtin_unreachable, so the patch just removes the associated two lines of code: else if (LABEL_P (insn)) *plabel = as_a <rtx_code_label *> (insn); and otherwise contains just adjustments to the commentary. gcc/ PR rtl-optimization/117327 * reorg.cc (find_end_label): Do not return a dangling label at the end of the function and adjust commentary. gcc/testsuite/ * gcc.c-torture/execute/20241029-1.c: New test.
