From: Richard Ball <richard.ball@arm.com>
Date: Tue, 1 Aug 2023 15:57:02 +0000 (+0100)
Subject: [PATCH] Add POLY_INT_CST support to fold_ctor_reference in gimple-fold.cc
X-Git-Tag: basepoints/gcc-15~7230
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c09e7e24b0d04857d5880197959e75bda0c489e;p=thirdparty%2Fgcc.git

[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 --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index 86b83472a616..fd01810581ad 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)