From 79f18ac6b7ab7744fcf8937ea4bc0c40f3efc629 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Mon, 11 Jul 2022 09:23:50 +0200 Subject: [PATCH] tree-optimization/106228 - fix vect_setup_realignment virtual SSA handling The following adds missing assignment of a virtual use operand to a created load to vect_setup_realignment which shows as bootstrap failure on powerpc64-linux and extra testsuite fails for targets when misaligned loads are not supported or not optimal. PR tree-optimization/106228 * tree-vect-data-refs.cc (vect_setup_realignment): Properly set a VUSE operand on the emitted load. --- gcc/tree-vect-data-refs.cc | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc index d20a10a..53e52cb 100644 --- a/gcc/tree-vect-data-refs.cc +++ b/gcc/tree-vect-data-refs.cc @@ -5780,6 +5780,13 @@ vect_setup_realignment (vec_info *vinfo, stmt_vec_info stmt_info, if (loop_for_initial_load) pe = loop_preheader_edge (loop_for_initial_load); + tree vuse; + gphi *vphi = get_virtual_phi (loop_for_initial_load->header); + if (vphi) + vuse = PHI_ARG_DEF_FROM_EDGE (vphi, pe); + else + vuse = gimple_vuse (gsi_stmt (*gsi)); + /* 3. For the case of the optimized realignment, create the first vector load at the loop preheader. */ @@ -5813,6 +5820,7 @@ vect_setup_realignment (vec_info *vinfo, stmt_vec_info stmt_info, new_stmt = gimple_build_assign (vec_dest, data_ref); new_temp = make_ssa_name (vec_dest, new_stmt); gimple_assign_set_lhs (new_stmt, new_temp); + gimple_set_vuse (new_stmt, vuse); if (pe) { new_bb = gsi_insert_on_edge_immediate (pe, new_stmt); -- 2.7.4