1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/analyzer/errno-1.c b/gcc/testsuite/gcc.dg/analyzer/errno-1.c
new file mode 100644
index 0000000..6b9d28c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/errno-1.c
@@ -0,0 +1,23 @@
+#include <errno.h>
+#include "analyzer-decls.h"
+
+extern void external_fn (void);
+
+int test_reading_errno (void)
+{
+  return errno;
+}
+
+void test_setting_errno (int val)
+{
+  errno = val;
+}
+
+void test_storing_to_errno (int val)
+{
+  __analyzer_eval (errno == val); /* { dg-warning "UNKNOWN" } */
+  errno = val;
+  __analyzer_eval (errno == val); /* { dg-warning "TRUE" } */
+  external_fn ();
+  __analyzer_eval (errno == val); /* { dg-warning "UNKNOWN" } */  
+}