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

[Richard Ball via Gcc-patches]

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 --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index 
4027ff71e10337fe49c600fcd5a80026b260d54d..91e80b9aaa3b4797ce3a94129ca42c98d974cbd9 
100644
--- a/gcc/gimple-fold.cc
+++ b/gcc/gimple-fold.cc
@@ -8162,8 +8162,8 @@ 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)