[gcc r15-1165] Fix pr115388.c: plain char could be unsigned by default [PR115415]

[Andrew Pinski]

https://gcc.gnu.org/g:c3d1153bc0a2b820e3c373ecf19a5a127703f854

commit r15-1165-gc3d1153bc0a2b820e3c373ecf19a5a127703f854
Author: Andrew Pinski <quic_apinski@quicinc.com>
Date:   Mon Jun 10 08:23:00 2024 -0700

    Fix pr115388.c: plain char could be unsigned by default [PR115415]
    
    This is a simple fix to the testcase as plain `char` could be
    unsigned by default on some targets (e.g. aarch64 and powerpc).
    
    Committed as obvious after quick test of the testcase on both aarch64 and x86_64.
    
    gcc/testsuite/ChangeLog:
    
            PR testsuite/115415
            PR tree-optimization/115388
            * gcc.dg/torture/pr115388.c: Use `signed char` directly instead
            of plain `char`.
    
    Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

Diff:
---
 gcc/testsuite/gcc.dg/torture/pr115388.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/torture/pr115388.c b/gcc/testsuite/gcc.dg/torture/pr115388.c
index c7c902888da..17b3f1bcd90 100644
--- a/gcc/testsuite/gcc.dg/torture/pr115388.c
+++ b/gcc/testsuite/gcc.dg/torture/pr115388.c
@@ -2,7 +2,7 @@
 
 int printf(const char *, ...);
 int a[10], b, c, d[0], h, i, j, k, l;
-char e = -1, g;
+signed char e = -1, g;
 volatile int f;
 static void n() {
   while (e >= 0)