removing dependencies on simplifier

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/ast/rewriter/bv_elim.h

@@ -0,0 +1,50 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    bv_elim.h
+
+Abstract:
+
+    Eliminate bit-vectors variables from clauses, by
+    replacing them by bound Boolean variables.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2008-12-16.
+
+Revision History:
+
+--*/
+#ifndef BV_ELIM_H_
+#define BV_ELIM_H_
+
+#include "ast/ast.h"
+#include "ast/rewriter/rewriter.h"
+
+class bv_elim_cfg : public default_rewriter_cfg {
+    ast_manager& m;
+public:
+    bv_elim_cfg(ast_manager& m) : m(m) {}
+
+    bool reduce_quantifier(quantifier * old_q, 
+                           expr * new_body, 
+                           expr * const * new_patterns, 
+                           expr * const * new_no_patterns,
+                           expr_ref & result,
+                           proof_ref & result_pr);
+};
+
+class bv_elim_rw : public rewriter_tpl<bv_elim_cfg> {
+protected:
+    bv_elim_cfg  m_cfg;
+public:
+    bv_elim_rw(ast_manager & m):
+        rewriter_tpl<bv_elim_cfg>(m, m.proofs_enabled(), m_cfg),
+        m_cfg(m)
+    {} 
+};
+
+#endif /* BV_ELIM_H_ */
+