1 files changed, 24 insertions, 0 deletions
diff --git a/libmudflap/testsuite/libmudflap.c/fail26-frag.c b/libmudflap/testsuite/libmudflap.c/fail26-frag.c
new file mode 100644
index 00000000000..88484d6adc4
--- /dev/null
+++ b/libmudflap/testsuite/libmudflap.c/fail26-frag.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+int main ()
+{
+char *foo;
+
+__mf_set_options ("-check-initialization");
+foo = (char *)malloc (1);
+
+/* These two operations each expand to a read-modify-write.
+ * Even though the end result is that every bit of foo[0] is
+ * eventually written to deterministically, the first read
+ * triggers an uninit error.  Ideally, it shouldn't, so this
+ * should be treated more like a regular XFAIL.  */
+foo[0] &= 0xfe;
+foo[0] |= 0x01;
+
+return foo[0];
+}
+/* { dg-output "mudflap violation 1.*" } */
+/* { dg-output "Nearby object.*" } */
+/* { dg-output "mudflap object.*malloc region.*1r/0w.*" } */
+/* { dg-do run { xfail *-*-* } } */