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-rw-r--r--cfrontend/Cminorgen.v6
1 files changed, 4 insertions, 2 deletions
diff --git a/cfrontend/Cminorgen.v b/cfrontend/Cminorgen.v
index 34a1080f..a3afae20 100644
--- a/cfrontend/Cminorgen.v
+++ b/cfrontend/Cminorgen.v
@@ -1,8 +1,10 @@
(** Translation from Csharpminor to Cminor. *)
+Require Import FSets.
+Require FSetAVL.
Require Import Coqlib.
Require Import Maps.
-Require Import Sets.
+Require Import Ordered.
Require Import AST.
Require Import Integers.
Require Mem.
@@ -287,7 +289,7 @@ Fixpoint transl_stmt (cenv: compilenv) (s: Csharpminor.stmt)
(** Computation of the set of variables whose address is taken in
a piece of Csharpminor code. *)
-Module Identset := MakeSet(PTree).
+Module Identset := FSetAVL.Make(OrderedPositive).
Fixpoint addr_taken_expr (e: Csharpminor.expr): Identset.t :=
match e with