[gcc/devel/c++-modules] Fix gcc.dg/ia64-sync-5.c for architectures with unsigned char as default (PR 96519)

[Nathan Sidwell]

https://gcc.gnu.org/g:36507a2c9cbac673553b043aa1817e674836c232

commit 36507a2c9cbac673553b043aa1817e674836c232
Author: Kwok Cheung Yeung <kcy@codesourcery.com>
Date:   Wed Aug 12 05:19:11 2020 -0700

    Fix gcc.dg/ia64-sync-5.c for architectures with unsigned char as default (PR 96519)
    
    If char is unsigned, then comparisons of the char array elements against
    negative integers in the test will fail as values in the array will always
    be positive, and will remain so when promoted to signed int.
    
    2020-08-12  Kwok Cheung Yeung  <kcy@codesourcery.com>
    
            PR testsuite/96519
    
            gcc/testsuite/
            * gcc.dg/ia64-sync-5.c (AC, init_qi, test_qi): Change element type to
            signed char.

Diff:
---
 gcc/testsuite/gcc.dg/ia64-sync-5.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.dg/ia64-sync-5.c b/gcc/testsuite/gcc.dg/ia64-sync-5.c
index 8b16b29b20e..a3923b06b35 100644
--- a/gcc/testsuite/gcc.dg/ia64-sync-5.c
+++ b/gcc/testsuite/gcc.dg/ia64-sync-5.c
@@ -14,9 +14,9 @@ extern void abort (void);
 extern void *memcpy (void *, const void *, size_t);
 extern int memcmp (const void *, const void *, size_t);
 
-static char AC[4];
-static char init_qi[4] = { -30,-30,-50,-50 };
-static char test_qi[4] = { -115,-115,25,25 };
+static signed char AC[4];
+static signed char init_qi[4] = { -30,-30,-50,-50 };
+static signed char test_qi[4] = { -115,-115,25,25 };
 
 static void
 do_qi (void)