https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97838
Bug ID: 97838 Summary: ICE at -O3 on x86_64-pc-linux-gnu: Segmentation fault Product: gcc Version: 11.0 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: --- [530] % 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/11.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++ --disable-werror --enable-multilib --with-system-zlib Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.0.0 20201115 (experimental) [master revision 406b452dc0e:d88ff5a679d:faab61b585a8b4a42454f085dd6b7815992a98f5] (GCC) [531] % [531] % gcctk -O2 -c small.c [532] % [532] % gcctk -O3 -c small.c during GIMPLE pass: vect small.c: In function âfâ: small.c:3:6: internal compiler error: Segmentation fault 3 | void f() { | ^ 0xd0426f crash_signal ../../gcc-trunk/gcc/toplev.c:330 0x1006810 auto_vec<int, 0ul>::auto_vec() ../../gcc-trunk/gcc/vec.h:1540 0x1006810 vect_optimize_slp(vec_info*) ../../gcc-trunk/gcc/tree-vect-slp.c:2702 0xfea9c7 vect_analyze_loop_2 ../../gcc-trunk/gcc/tree-vect-loop.c:2300 0xfea9c7 vect_analyze_loop(loop*, vec_info_shared*) ../../gcc-trunk/gcc/tree-vect-loop.c:2895 0x1015dbc try_vectorize_loop_1 ../../gcc-trunk/gcc/tree-vectorizer.c:995 0x1016949 vectorize_loops() ../../gcc-trunk/gcc/tree-vectorizer.c:1229 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. [533] % [533] % cat small.c int a, b, c, d; void f() { while (c++) { int e = -1; d = a ? e / a : e; b ^= ~d; } }