gcc/testsuite

	* gcc.dg/torture/pr126136: Make chars explicitly signed.

diff --git a/gcc/testsuite/gcc.dg/torture/pr126136.c b/gcc/testsuite/gcc.dg/torture/pr126136.c
index cc270f51ca2..0ab01a45d49 100644
--- a/gcc/testsuite/gcc.dg/torture/pr126136.c
+++ b/gcc/testsuite/gcc.dg/torture/pr126136.c
@@ -3,7 +3,7 @@
 int i;
 
 __attribute__ ((noipa,noclone,noinline))
-char foo(char val)
+signed char foo(signed char val)
 {
   i++;
   if (i > 1)