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-rw-r--r--test/lit/passes/cfp.wast4
1 files changed, 4 insertions, 0 deletions
diff --git a/test/lit/passes/cfp.wast b/test/lit/passes/cfp.wast
index 0cc1d8c00..c3bc81a1b 100644
--- a/test/lit/passes/cfp.wast
+++ b/test/lit/passes/cfp.wast
@@ -767,6 +767,10 @@
;; Subtyping: Create both a subtype and a supertype, with different constants
;; for the shared field, preventing optimization, as a get of the
;; supertype may receive an instance of the subtype.
+;;
+;; Note that this may be optimized using a ref.test, in --cfp-reftest, but not
+;; in --cfp. This gives us coverage that --cfp does not do the things that
+;; --cfp-reftest does (how --cfp-reftest works is tested in cfp-reftest.wast).
(module
;; CHECK: (type $struct (sub (struct (field i32))))
(type $struct (sub (struct i32)))