https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107300
--- Comment #8 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:d2423144eb36a68fd0da9224857ce807714874a7 commit r13-5645-gd2423144eb36a68fd0da9224857ce807714874a7 Author: Jakub Jelinek <ja...@redhat.com> Date: Thu Feb 2 10:54:54 2023 +0100 Replace IFN_TRAP with BUILT_IN_UNREACHABLE_TRAP [PR107300] For PR106099 I've added IFN_TRAP as an alternative to __builtin_trap meant for __builtin_unreachable purposes (e.g. with -funreachable-traps or some sanitizers) which doesn't need vops because __builtin_unreachable doesn't need them either. This works in various cases, but unfortunately IPA likes to decide on the redirection to unreachable just by tweaking the cgraph edge to point to a different FUNCTION_DECL. As internal functions don't have a decl, this causes problems like in the following testcase. The following patch fixes it by removing IFN_TRAP again and replacing it with user inaccessible BUILT_IN_UNREACHABLE_TRAP, so that e.g. builtin_decl_unreachable can return it directly and we don't need to tweak it later in wherever we actually replace the call stmt. 2023-02-02 Jakub Jelinek <ja...@redhat.com> PR ipa/107300 * builtins.def (BUILT_IN_UNREACHABLE_TRAP): New builtin. * internal-fn.def (TRAP): Remove. * internal-fn.cc (expand_TRAP): Remove. * tree.cc (build_common_builtin_nodes): Define BUILT_IN_UNREACHABLE_TRAP if not yet defined. (builtin_decl_unreachable): Use BUILT_IN_UNREACHABLE_TRAP instead of BUILT_IN_TRAP. * gimple.cc (gimple_build_builtin_unreachable): Remove emitting internal function for BUILT_IN_TRAP. * asan.cc (maybe_instrument_call): Handle BUILT_IN_UNREACHABLE_TRAP. * cgraph.cc (cgraph_edge::verify_corresponds_to_fndecl): Handle BUILT_IN_UNREACHABLE_TRAP instead of BUILT_IN_TRAP. * ipa-devirt.cc (possible_polymorphic_call_target_p): Handle BUILT_IN_UNREACHABLE_TRAP. * builtins.cc (expand_builtin, is_inexpensive_builtin): Likewise. * tree-cfg.cc (verify_gimple_call, pass_warn_function_return::execute): Likewise. * attribs.cc (decl_attributes): Don't report exclusions on BUILT_IN_UNREACHABLE_TRAP either. * gcc.dg/pr107300.c: New test.
