make max_bv_sharing a simplifier

src/ast/simplifiers/max_bv_sharing.h

@@ -0,0 +1,25 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    max_bv_sharing.h
+
+Abstract:
+
+    Rewriter for "maximing" the number of shared terms.
+    The idea is to rewrite AC terms to maximize sharing.
+    This rewriter is particularly useful for reducing
+    the number of Adders and Multipliers before "bit-blasting".
+
+Author:
+
+    Leonardo de Moura (leonardo) 2011-12-29.
+
+--*/
+
+#pragma once
+
+#include "ast/simplifiers/dependent_expr_state.h"
+
+dependent_expr_simplifier * mk_max_bv_sharing(ast_manager & m, params_ref const & p, dependent_expr_state& fmls);