The tree optimizers cannot remove all references to multilib_exclusions_var, while RTL does.
-- Summary: Does not remove all references to var Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: missed-optimization, TREE Severity: normal Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23777