https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88861
Bug ID: 88861 Summary: [9 Regression] ICE in calc_dfs_tree, at dominance.c:458 Product: gcc Version: 9.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: segher at gcc dot gnu.org Target Milestone: --- Host: x86_64-pc-linux-gnu Target: ppc64-linux-gnu Following is causing ICE: $ cat flex.ii struct Ax { int n, a[]; }; int i = 12345678; int main() { static Ax s{456, i}; ((s.a[0]) ? (void)0 : (void)0); } $ ppc64-linux-gnu-g++ flex.ii -O2 -fnon-call-exceptions -c during RTL pass: ce2 flex.ii: In function ‘int main()’: flex.ii:9:1: internal compiler error: in calc_dfs_tree, at dominance.c:458 9 | } | ^ 0x5923df calc_dfs_tree /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/dominance.c:458 0x82365d calculate_dominance_info(cdi_direction) /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/dominance.c:734 0x7c476d flow_loops_find(loops*) /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/cfgloop.c:431 0x9ed2ae loop_optimizer_init(unsigned int) /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/loop-init.c:93 0x117c280 if_convert /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/ifcvt.c:5374 0x117dc1d execute /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64/build/gcc/ifcvt.c:5553