[gcc r13-3268] vect: Don't pattern match BITFIELD_REF's of non-integrals [PR107226]

[Andre Simoes Dias Vieira <avieira@gcc.gnu.org>]

https://gcc.gnu.org/g:7f9a7465c863e482708d2a00f5f7ff91ae3a7e0b

commit r13-3268-g7f9a7465c863e482708d2a00f5f7ff91ae3a7e0b
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date:   Thu Oct 13 10:34:27 2022 +0100

    vect: Don't pattern match BITFIELD_REF's of non-integrals [PR107226]
    
    The original patch supported matching the vect_recog_bitfield_ref_pattern for
    BITFIELD_REF's where the first operand didn't have a INTEGRAL_TYPE_P type.
    That means it would also match vectors, leading to regressions in targets that
    supported vectorization of those.
    
    gcc/ChangeLog:
    
            PR tree-optimization/107226
            * tree-vect-patterns.cc (vect_recog_bitfield_ref_pattern): Reject
            BITFIELD_REF's with non integral typed first operands.

Diff:
---
 gcc/tree-vect-patterns.cc | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/gcc/tree-vect-patterns.cc b/gcc/tree-vect-patterns.cc
index 0cc315d3126..6afd57a50c4 100644
--- a/gcc/tree-vect-patterns.cc
+++ b/gcc/tree-vect-patterns.cc
@@ -1913,6 +1913,7 @@ vect_recog_bitfield_ref_pattern (vec_info *vinfo, stmt_vec_info stmt_info,
     return NULL;
 
   if (!INTEGRAL_TYPE_P (TREE_TYPE (bf_ref))
+      || !INTEGRAL_TYPE_P (TREE_TYPE (container))
       || TYPE_MODE (TREE_TYPE (container)) == E_BLKmode)
     return NULL;
 
@@ -1921,25 +1922,7 @@ vect_recog_bitfield_ref_pattern (vec_info *vinfo, stmt_vec_info stmt_info,
   tree ret = gimple_assign_lhs (first_stmt);
   tree ret_type = TREE_TYPE (ret);
   bool shift_first = true;
-  tree vectype;
-
-  /* If the first operand of the BIT_FIELD_REF is not an INTEGER type, convert
-     it to one of the same width so we can perform the necessary masking and
-     shifting.  */
-  if (!INTEGRAL_TYPE_P (TREE_TYPE (container)))
-    {
-      unsigned HOST_WIDE_INT container_size =
-	tree_to_uhwi (TYPE_SIZE (TREE_TYPE (container)));
-      tree int_type = build_nonstandard_integer_type (container_size, true);
-      pattern_stmt
-	= gimple_build_assign (vect_recog_temp_ssa_var (int_type),
-			       VIEW_CONVERT_EXPR, container);
-      vectype = get_vectype_for_scalar_type (vinfo, int_type);
-      container = gimple_assign_lhs (pattern_stmt);
-      append_pattern_def_seq (vinfo, stmt_info, pattern_stmt, vectype);
-    }
-  else
-    vectype = get_vectype_for_scalar_type (vinfo, TREE_TYPE (container));
+  tree vectype = get_vectype_for_scalar_type (vinfo, TREE_TYPE (container));
 
   /* We move the conversion earlier if the loaded type is smaller than the
      return type to enable the use of widening loads.  */