type_is_ok(), used to calculate the base type of enums,
has a bug related to UB when doing a full width rshift.
Add a testcase for this.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
validation/bug-rshift-ub.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
create mode 100644 validation/bug-rshift-ub.c
diff --git a/validation/bug-rshift-ub.c b/validation/bug-rshift-ub.c
new file mode 100644
index 000000000..3a5f3a577
--- /dev/null
+++ b/validation/bug-rshift-ub.c
@@ -0,0 +1,17 @@
+enum a {
+ A = ~0ULL,
+};
+
+static enum a a = A;
+
+/*
+ * check-name: bug-rshift-ub
+ * check-known-to-fail
+ * check-description:
+ * This test trigger(ed) a bug on x86 caused by a
+ * full width shift (which is UB), expecting to get
+ * 0 but giving the unshifted value and as result
+ * the type is invalid:
+ * warning: incorrect type in initializer (invalid types)
+ * expected bad type enum a static [toplevel] a
+ */
--
2.18.0
