https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109417
Bug ID: 109417 Summary: ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zhendong.su at inf dot ethz.ch Target Milestone: --- This appears to be a recent regression. Compiler Explorer: https://godbolt.org/z/eM6aG1aYc [605] % gcctk -v Using built-in specs. COLLECT_GCC=gcctk COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/13.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk --enable-sanitizers --enable-languages=c,c++ --disable-werror --enable-multilib --with-system-zlib Thread model: posix Supported LTO compression algorithms: zlib gcc version 13.0.1 20230405 (experimental) [master r13-7008-gfdc5abbdcfb] (GCC) [606] % [606] % gcctk -O2 small.c; ./a.out [607] % [607] % gcctk -O3 small.c during GIMPLE pass: vrp small.c: In function ‘main’: small.c:3:5: internal compiler error: Segmentation fault 3 | int main() { | ^~~~ 0xeeb4bf crash_signal ../../gcc-trunk/gcc/toplev.cc:314 0x1cea605 gori_compute::may_recompute_p(tree_node*, basic_block_def*, int) ../../gcc-trunk/gcc/gimple-range-gori.cc:1322 0x1cda775 ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*, ranger_cache::rfd_mode) ../../gcc-trunk/gcc/gimple-range-cache.cc:1462 0x1cdc8e0 ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*, ranger_cache::rfd_mode) ../../gcc-trunk/gcc/gimple-range-cache.cc:1426 0x1cdc8e0 ranger_cache::fill_block_cache(tree_node*, basic_block_def*, basic_block_def*) ../../gcc-trunk/gcc/gimple-range-cache.cc:1212 0x1cdd5a4 ranger_cache::block_range(vrange&, basic_block_def*, tree_node*, bool) ../../gcc-trunk/gcc/gimple-range-cache.cc:1039 0x1cd3ce8 gimple_ranger::range_on_entry(vrange&, basic_block_def*, tree_node*) ../../gcc-trunk/gcc/gimple-range.cc:156 0x11bde4a remove_unreachable::remove_and_update_globals(bool) ../../gcc-trunk/gcc/tree-vrp.cc:156 0x11c066d remove_unreachable::remove_and_update_globals(bool) ../../gcc-trunk/gcc/tree-vrp.cc:1104 0x11c066d execute_ranger_vrp(function*, bool, bool) ../../gcc-trunk/gcc/tree-vrp.cc:1104 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. [608] % [608] % cat small.c int printf(const char *, ...); int c, d, *e, f[1][2], g; int main() { int h = 0, *a = &h, **b[1] = {&a}; while (e) while (g) { L: for (h = 0; h < 2; h++) { while (d) for (*e = 0; *e < 1;) printf("0"); while (c) ; f[g][h] = 0; } } if (h) goto L; return 0; }