re PR tree-optimization/81573 (wrong code at -O3 on x86_64-linux-gnu)

2017-07-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/81573
	* gcc.dg/torture/pr81573.c: Explicitely use signed char.

From-SVN: r250650

gcc/testsuite/ChangeLog

+2017-07-28  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/81573
+	* gcc.dg/torture/pr81573.c: Explicitely use signed char.
+
 2017-07-27  Peter Bergner  <bergner@vnet.ibm.com>
 
 	* g++.dg/pr69667.C: Remove option -mlra.

gcc/testsuite/gcc.dg/torture/pr81573.c

 /* { dg-do run } */
 
 int a = 1, *c = &a, d;
-char b;
+signed char b;
 
 int main ()
 {