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-rw-r--r--language/l2.lem1
1 files changed, 1 insertions, 0 deletions
diff --git a/language/l2.lem b/language/l2.lem
index b19639bb..af6b1485 100644
--- a/language/l2.lem
+++ b/language/l2.lem
@@ -66,6 +66,7 @@ type base_effect_aux = (* effect *)
| BE_wreg (* write register *)
| BE_rmem (* read memory *)
| BE_wmem (* write memory *)
+ | BE_barr (* memory barrier *)
| BE_undef (* undefined-instruction exception *)
| BE_unspec (* unspecified values *)
| BE_nondet (* nondeterminism from intra-instruction parallelism *)