https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92129
Bug ID: 92129 Summary: [10 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:5869 Product: gcc Version: 10.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- gcc-10.0.0-alpha20191013 snapshot (r276943) ICEs when compiling the following testcase w/ -O1 -ftree-loop-vectorize -fno-tree-copy-prop: unsigned int lq; int aw; void m2 (int o9) { while (o9 < 2) { for (aw = 0; aw < 2; ++aw) lq *= aw ? 2 : lq < 2; ++o9; } } % gcc-10.0.0-alpha20191013 -O1 -ftree-loop-vectorize -fno-tree-copy-prop -c k2t5fs2w.c during GIMPLE pass: vect k2t5fs2w.c: In function 'm2': k2t5fs2w.c:5:1: internal compiler error: in vectorizable_reduction, at tree-vect-loop.c:5869 5 | m2 (int o9) | ^~ 0x6b8023 vectorizable_reduction(_stmt_vec_info*, _slp_tree*, _slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*) /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:5869 0xe91b61 vect_analyze_loop_operations /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:1561 0xe91b61 vect_analyze_loop_2 /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:2033 0xe91b61 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*) /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vect-loop.c:2336 0xeaa308 try_vectorize_loop_1 /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vectorizer.c:887 0xeaad0a vectorize_loops() /var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191013/work/gcc-10-20191013/gcc/tree-vectorizer.c:1107