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-rw-r--r--test/typecheck/pass/reg_ref.sail13
1 files changed, 13 insertions, 0 deletions
diff --git a/test/typecheck/pass/reg_ref.sail b/test/typecheck/pass/reg_ref.sail
new file mode 100644
index 00000000..a81f6abf
--- /dev/null
+++ b/test/typecheck/pass/reg_ref.sail
@@ -0,0 +1,13 @@
+register reg : range(0, 10)
+
+val modify : register(range(0,10)) -> unit effect {wreg}
+
+function modify (r) = {
+ (*r) = 9;
+ (*r) = 10;
+ (*r) = 8
+}
+
+val test : unit -> unit effect {wreg}
+
+function test () = modify(ref reg)