From: Richard Biener <rguenther@suse.de>
Date: Tue, 28 Nov 2023 11:36:21 +0000 (+0100)
Subject: middle-end/112732 - stray TYPE_ALIAS_SET in type variant
X-Git-Tag: releases/gcc-11.5.0~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7879391bb2b86606d0ce35ed97eccc108970e36;p=thirdparty%2Fgcc.git

middle-end/112732 - stray TYPE_ALIAS_SET in type variant

The following fixes a stray TYPE_ALIAS_SET in a type variant built
by build_opaque_vector_type which is diagnosed by type checking
enabled with -flto.

	PR middle-end/112732
	* tree.c (build_opaque_vector_type): Reset TYPE_ALIAS_SET
	of the newly built type.

(cherry picked from commit f26d68d5d128c86faaceeb81b1e8f22254ad53df)
---

diff --git a/gcc/tree.c b/gcc/tree.c
index 8b5b0b7508cc..2cbdc7b65ba9 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -11098,6 +11098,8 @@ build_opaque_vector_type (tree innertype, poly_int64 nunits)
   TYPE_NEXT_VARIANT (cand) = TYPE_NEXT_VARIANT (t);
   TYPE_NEXT_VARIANT (t) = cand;
   TYPE_MAIN_VARIANT (cand) = TYPE_MAIN_VARIANT (t);
+  /* Type variants have no alias set defined.  */
+  TYPE_ALIAS_SET (cand) = -1;
   return cand;
 }