[gcc r14-2789] testsuite/110763: Ensure zero return from test

[gcc r14-2789] testsuite/110763: Ensure zero return from test

[Siddhesh Poyarekar]

https://gcc.gnu.org/g:386df7ce7b38ef00e28080a779ef2dfd6949cf15

commit r14-2789-g386df7ce7b38ef00e28080a779ef2dfd6949cf15
Author: Siddhesh Poyarekar <siddhesh@gotplt.org>
Date:   Fri Jul 21 11:13:58 2023 -0400

    testsuite/110763: Ensure zero return from test
    
    The test deliberately reads beyond bounds to exersize ubsan and the
    return value may be anything, based on previous allocations.  The OFF
    test caters for it by ANDing the return with 0, do the same for the DYN
    test.
    
    gcc/testsuite/ChangeLog:
    
            PR testsuite/110763
            * gcc.dg/ubsan/object-size-dyn.c (dyn): New parameter RET.
            (main): Use it.
    
    Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>

Diff:
---
 gcc/testsuite/gcc.dg/ubsan/object-size-dyn.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.dg/ubsan/object-size-dyn.c b/gcc/testsuite/gcc.dg/ubsan/object-size-dyn.c
index 0159f5b9820..49c3abe2e72 100644
--- a/gcc/testsuite/gcc.dg/ubsan/object-size-dyn.c
+++ b/gcc/testsuite/gcc.dg/ubsan/object-size-dyn.c
@@ -5,12 +5,12 @@
 
 int
 __attribute__ ((noinline))
-dyn (int size, int i)
+dyn (int size, int i, int ret)
 {
   __builtin_printf ("dyn\n");
   fflush (stdout);
   int *alloc = __builtin_calloc (size, sizeof (int));
-  int ret = alloc[i];
+  ret = ret & alloc[i];
   __builtin_free (alloc);
   return ret;
 }
@@ -28,7 +28,7 @@ off (int size, int i, int ret)
 int
 main (void)
 {
-  int ret = dyn (2, 2);
+  int ret = dyn (2, 2, 0);
 
   ret |= off (4, 4, 0);