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[Bug tree-optimization/64728] [5 Regression] internal compiler error: SSA corruption
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 22 Jan 2015 13:07:05 +0000
- Subject: [Bug tree-optimization/64728] [5 Regression] internal compiler error: SSA corruption
- Auto-submitted: auto-generated
- References: <bug-64728-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64728
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> Index: tree-ssa-coalesce.c
> ===================================================================
> --- tree-ssa-coalesce.c (revision 219989)
> +++ tree-ssa-coalesce.c (working copy)
> @@ -1213,8 +1215,11 @@ coalesce_partitions (var_map map, ssa_co
> gsi_next (&gsi))
> {
> gphi *phi = gsi.phi ();
> - tree res = PHI_RESULT (phi);
> tree arg = PHI_ARG_DEF (phi, e->dest_idx);
> + if (SSA_NAME_IS_DEFAULT_DEF (arg))
> + continue;
> +
> + tree res = PHI_RESULT (phi);
> int v1 = SSA_NAME_VERSION (res);
> int v2 = SSA_NAME_VERSION (arg);
>
>
> fixes it for me.
Is that right even when SSA_NAME_VAR is a PARM_DECL?