https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101202
Bug ID: 101202 Summary: ICE 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 seems to be a very recent regression. [529] % 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/12.0.0/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 12.0.0 20210624 (experimental) [master revision a0accaa9984:cc7f2982315:ce3316e9c02c81c509173572c71a101f4eb62a24] (GCC) [530] % [530] % gcctk -O2 small.c; ./a.out [531] % [531] % gcctk -O3 small.c during GIMPLE pass: slp small.c: In function ‘main’: small.c:4:5: internal compiler error: Segmentation fault 4 | int main() { | ^~~~ 0xdb35cf crash_signal ../../gcc-trunk/gcc/toplev.c:327 0x10cf440 vect_optimize_slp(vec_info*) ../../gcc-trunk/gcc/tree-vect-slp.c:3694 0x10d7d77 vect_optimize_slp(vec_info*) ../../gcc-trunk/gcc/vec.h:1448 0x10d7d77 vect_slp_analyze_bb_1 ../../gcc-trunk/gcc/tree-vect-slp.c:5608 0x10d7d77 vect_slp_region ../../gcc-trunk/gcc/tree-vect-slp.c:5695 0x10d9a0a vect_slp_bbs ../../gcc-trunk/gcc/tree-vect-slp.c:5845 0x10d9f4c vect_slp_function(function*) ../../gcc-trunk/gcc/tree-vect-slp.c:5931 0x10e12a6 execute ../../gcc-trunk/gcc/tree-vectorizer.c:1445 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. [532] % [532] % cat small.c int printf(const char *, ...); unsigned a, b, d; int c, e, f; int main() { while (a) if (b) { f = a; while (e) { int h, i; if (d) { h = a; i = d; L: d = a | d && c; if (a) { printf("%d", a); goto L; } } a = h; d = i; } } return 0; }