[tree-optimization/111721 V2] VECT: Support SLP for MASK_LEN_GATHER_LOAD with dummy mask

[Juzhe-Zhong]

This patch fixes following FAILs for RVV:
FAIL: gcc.dg/vect/vect-gather-1.c -flto -ffat-lto-objects  scan-tree-dump vect 
"Loop contains only SLP stmts"
FAIL: gcc.dg/vect/vect-gather-1.c scan-tree-dump vect "Loop contains only SLP 
stmts"

Bootstrap on X86 and regtest passed.

Ok for trunk ?

        PR tree-optimization/111721

gcc/ChangeLog:

        * tree-vect-slp.cc (vect_get_and_check_slp_defs): Support SLP for dummy 
mask -1.
        * tree-vect-stmts.cc (vectorizable_load): Ditto.

---
 gcc/tree-vect-slp.cc   | 5 ++---
 gcc/tree-vect-stmts.cc | 5 +++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index 43d742e3c92..6b8a7b628b6 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -759,9 +759,8 @@ vect_get_and_check_slp_defs (vec_info *vinfo, unsigned char 
swap,
          if ((dt == vect_constant_def
               || dt == vect_external_def)
              && !GET_MODE_SIZE (vinfo->vector_mode).is_constant ()
-             && (TREE_CODE (type) == BOOLEAN_TYPE
-                 || !can_duplicate_and_interleave_p (vinfo, stmts.length (),
-                                                     type)))
+             && TREE_CODE (type) != BOOLEAN_TYPE
+             && !can_duplicate_and_interleave_p (vinfo, stmts.length (), type))
            {
              if (dump_enabled_p ())
                dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 6ce4868d3e1..8c92bd5d931 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9825,6 +9825,7 @@ vectorizable_load (vec_info *vinfo,
 
   tree mask = NULL_TREE, mask_vectype = NULL_TREE;
   int mask_index = -1;
+  slp_tree slp_op = NULL;
   if (gassign *assign = dyn_cast <gassign *> (stmt_info->stmt))
     {
       scalar_dest = gimple_assign_lhs (assign);
@@ -9861,7 +9862,7 @@ vectorizable_load (vec_info *vinfo,
        mask_index = vect_slp_child_index_for_operand (call, mask_index);
       if (mask_index >= 0
          && !vect_check_scalar_mask (vinfo, stmt_info, slp_node, mask_index,
-                                     &mask, NULL, &mask_dt, &mask_vectype))
+                                     &mask, &slp_op, &mask_dt, &mask_vectype))
        return false;
     }
 
@@ -10046,7 +10047,7 @@ vectorizable_load (vec_info *vinfo,
     {
       if (slp_node
          && mask
-         && !vect_maybe_update_slp_op_vectype (SLP_TREE_CHILDREN (slp_node)[0],
+         && !vect_maybe_update_slp_op_vectype (slp_op,
                                                mask_vectype))
        {
          if (dump_enabled_p ())
-- 
2.36.3