https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64728
--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> --- On Thu, 22 Jan 2015, jakub at gcc dot gnu.org wrote: > 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? No, of course not. > >
