PR c++/91165 follow-on tweak

I talked in the PR about possibly stripping the location from the args in
the hash table, since if we use the cache the locations would be wrong, but
didn't actually do anything about that.  Then I noticed that there's already
unshare_expr_without_location...

	* constexpr.c (cxx_eval_call_expression): Use
	unshare_expr_without_location.

From-SVN: r279557

gcc/cp/ChangeLog

+2019-12-18  Jason Merrill  <jason@redhat.com>
+
+	PR c++/91165 follow-on tweak
+	* constexpr.c (cxx_eval_call_expression): Use
+	unshare_expr_without_location.
+
 2019-12-19  Julian Brown  <julian@codesourcery.com>
 	    Maciej W. Rozycki  <macro@codesourcery.com>
 	    Tobias Burnus  <tobias@codesourcery.com>

gcc/cp/constexpr.c

@@ -2079,7 +2079,7 @@ cxx_eval_call_expression (const constexpr_ctx *ctx, tree t,
 		  /* Unshare args going into the hash table to separate them
 		     from the caller's context, for better GC and to avoid
 		     problems with verify_gimple.  */
-		  arg = unshare_expr (arg);
+		  arg = unshare_expr_without_location (arg);
 		  TREE_VEC_ELT (bound, i) = arg;
 		}
 	      /* Don't share a CONSTRUCTOR that might be changed.  This is not