As reported in PR 37027, VEC_EXTRACT_EVEN_EXPR and VEC_EXTRACT_ODD_EXPR print out as <<< ??? >>> in the tree dumps after the tuples merge.
-- Summary: [4.4 Regression] VEC_EXTRACT_EVEN_EXPR/VEC_EXTRACT_ODD_EXPR no longer print out correctly in the tree dumps Product: gcc Version: 4.3.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38641