1 files changed, 9 insertions, 0 deletions
diff --git a/testbed/custom_opt.c b/testbed/custom_opt.c
new file mode 100644
index 0000000..d0126f3
--- /dev/null
+++ b/testbed/custom_opt.c
@@ -0,0 +1,9 @@
+int sum;
+void f() {
+    sum = 3;
+}
+int main() {
+    sum = 1;
+    f();
+    printf("%d\n", sum);
+}