re PR c++/34917 (ICE with const vector)

	PR c++/34917
	* tree.c (build_type_attribute_qual_variant): Call
	build_qualified_type if attributes are equal, but quals are not.

	* g++.dg/ext/vector12.C: New test.

From-SVN: r131726

1 files changed, 2 insertions, 0 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 4757cbc..b6b3eef 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -3735,6 +3735,8 @@ build_type_attribute_qual_variant (tree ttype, tree attribute, int quals)
 
       ttype = build_qualified_type (ntype, quals);
     }
+  else if (TYPE_QUALS (ttype) != quals)
+    ttype = build_qualified_type (ttype, quals);
 
   return ttype;
 }