https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70807
Bug ID: 70807 Summary: fwprop pass doesn't with incoming CDI_DOMINATORS Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: hjl.tools at gmail dot com Target Milestone: --- When calculate_dominance_info (CDI_DOMINATORS); is called before fwprop pass, fwprop pass will ICE if free_dominance_info (CDI_DOMINATORS); isn't called before fwprop pass: https://gcc.gnu.org/ml/gcc/2016-03/msg00143.html I will provide a patch to trigger ICE in libgcc build on x86-64 after PR target/70155 is fixed.