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[Bug tree-optimization/65337] [5/6 Regression] bootstrap-lto gnat1 linktime ICE: gcc/ada/exp_aggr.adb:6570:0: internal compiler error: in forward_edge_to_pdom, at tree-ssa-dce.c:1086
- From: "hubicka at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 30 Apr 2015 04:29:49 +0000
- Subject: [Bug tree-optimization/65337] [5/6 Regression] bootstrap-lto gnat1 linktime ICE: gcc/ada/exp_aggr.adb:6570:0: internal compiler error: in forward_edge_to_pdom, at tree-ssa-dce.c:1086
- Auto-submitted: auto-generated
- References: <bug-65337-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65337
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2015-03-13 00:00:00 |2015-4-30
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Still ICE during LTObootstrap on PPC64 (gcc110). I will try to at least figure
out what goes wrong with the PHI (if it is wrong control dependency due to
critical edge or something else)
I suppose we can relax the check to:
degenerate_phi_p (phi) || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (gimple_phi_result
(phi)
but we may need to trigger SSA rewrite on resulting code as cddce will break
dominance conditions on the PHI.