[gcc r14-2909] [PATCH] Add POLY_INT_CST support to fold_ctor_reference in gimple-fold.cc

[gcc r14-2909] [PATCH] Add POLY_INT_CST support to fold_ctor_reference in gimple-fold.cc

[Richard Ball]

https://gcc.gnu.org/g:7c09e7e24b0d04857d5880197959e75bda0c489e

commit r14-2909-g7c09e7e24b0d04857d5880197959e75bda0c489e
Author: Richard Ball <richard.ball@arm.com>
Date:   Tue Aug 1 16:57:02 2023 +0100

    [PATCH] Add POLY_INT_CST support to fold_ctor_reference in gimple-fold.cc
    
    Add POLY_INT_CST support to code within
    fold_ctor_reference. This code previously
    only supported INTEGER_CST which caused a
    bug when using VEC_PERM_EXPR with SVE vectors.
    
    gcc/ChangeLog:
    
            * gimple-fold.cc (fold_ctor_reference):
            Add support for poly_int.

Diff:
---
 gcc/gimple-fold.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index 86b83472a61..fd01810581a 100644
--- a/gcc/gimple-fold.cc
+++ b/gcc/gimple-fold.cc
@@ -8159,8 +8159,8 @@ fold_ctor_reference (tree type, tree ctor, const poly_uint64 &poly_offset,
      result.  */
   if (!AGGREGATE_TYPE_P (TREE_TYPE (ctor)) && !offset
       /* VIEW_CONVERT_EXPR is defined only for matching sizes.  */
-      && !compare_tree_int (TYPE_SIZE (type), size)
-      && !compare_tree_int (TYPE_SIZE (TREE_TYPE (ctor)), size))
+      && known_eq (wi::to_poly_widest (TYPE_SIZE (type)), size)
+      && known_eq (wi::to_poly_widest (TYPE_SIZE (TREE_TYPE (ctor))), size))
     {
       ret = canonicalize_constructor_val (unshare_expr (ctor), from_decl);
       if (ret)