https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106190
--- Comment #11 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:2d96422f4608c04d6a7c8444f14446c309416e24 commit r12-9424-g2d96422f4608c04d6a7c8444f14446c309416e24 Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Mar 28 10:56:44 2023 +0200 sanopt: Return TODO_cleanup_cfg if any .{UB,HWA,A}SAN_* calls were lowered [PR106190] The following testcase ICEs, because without optimization eh lowering decides not to duplicate finally block of try/finally and so we end up with variable guarded cleanup. The sanopt pass creates a cfg that ought to be cleaned up (some IFN_UBSAN_* functions are lowered in this case with constant conditions in gcond and when not allowing recovery some bbs which end with noreturn calls actually have successor edges), but the cfg cleanup is actually (it is -O0) done only during the optimized pass. We notice there that the d[1][a] = 0; statement which has an EH edge is unreachable (because ubsan would always abort on the out of bounds d[1] access), remove the EH landing pad and block, but because that block just sets a variable and jumps to another one which tests that variable and that one is reachable from normal control flow, the __builtin_eh_pointer (1) later in there is kept in the IL and we ICE during expansion of that statement because the EH region has been removed. The following patch fixes it by doing the cfg cleanup already during sanopt pass if we create something that might need it, while the EH landing pad is then removed already during sanopt pass, there is ehcleanup later and we don't ICE anymore. 2023-03-28 Jakub Jelinek <ja...@redhat.com> PR middle-end/106190 * sanopt.cc (pass_sanopt::execute): Return TODO_cleanup_cfg if any of the IFN_{UB,HWA,A}SAN_* internal fns are lowered. * gcc.dg/asan/pr106190.c: New test. (cherry picked from commit 39a43dc336561e0eba0de477b16c7355f19d84ee)
