https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99007
Bug ID: 99007 Summary: [11 Regression] ICE in dominated_by_p, at dominance.c:1124 Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Started between 20201018 and 20201108 : $ cat z1.cc template <typename T> void bar (T *) { T s[0/0]; #pragma omp teams distribute parallel for reduction(+:s) allocate(s) for (int i = 0; i < 8; i++); } void foo () { long *a; bar (a); } $ g++-11-20210207 -c z1.cc -fopenmp z1.cc: In function 'void bar(T*)': z1.cc:3:8: warning: division by zero [-Wdiv-by-zero] 3 | T s[0/0]; | ~^~ z1.cc: In instantiation of 'void bar(T*) [with T = long int]': z1.cc:10:9: required from here z1.cc:3:8: warning: division by zero [-Wdiv-by-zero] during GIMPLE pass: ssa z1.cc: In function '_Z3barIlEvPT_._omp_fn.0': z1.cc:11:1: internal compiler error: Segmentation fault 11 | } | ^ 0xfe6cdf crash_signal ../../gcc/toplev.c:327 0xb6e764 dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def const*) ../../gcc/dominance.c:1124 0x1259775 verify_use ../../gcc/tree-ssa.c:892 0x125e462 verify_ssa(bool, bool) ../../gcc/tree-ssa.c:1167 0xef8a87 execute_function_todo ../../gcc/passes.c:2049 0xef97f2 execute_todo ../../gcc/passes.c:2096