[gcc r14-7111] testsuite: Add testcase for already fixed PR [PR112734]

[Jakub Jelinek]

https://gcc.gnu.org/g:ac6bcce1d0a364129c7e9f6cf7f75233bdd5c5f1

commit r14-7111-gac6bcce1d0a364129c7e9f6cf7f75233bdd5c5f1
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Jan 10 17:18:38 2024 +0100

    testsuite: Add testcase for already fixed PR [PR112734]
    
    This test was already fixed by r14-6051 aka PR112770 fix.
    
    2024-01-10  Jakub Jelinek  <jakub@redhat.com>
    
            PR tree-optimization/112734
            * gcc.dg/bitint-64.c: New test.

Diff:
---
 gcc/testsuite/gcc.dg/bitint-64.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/bitint-64.c b/gcc/testsuite/gcc.dg/bitint-64.c
new file mode 100644
index 00000000000..0c7524c088b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/bitint-64.c
@@ -0,0 +1,16 @@
+/* PR tree-optimization/112734 */
+/* { dg-do compile { target bitint } } */
+/* { dg-options "-std=c23 -fnon-call-exceptions -ftrapv" } */
+
+#if __BITINT_MAXWIDTH__ >= 128
+_BitInt(128) out;
+#else
+int out;
+#endif
+
+int
+main ()
+{
+  _BitInt(8) q[1];
+  out -= 1;
+}