re-organize muz_qe into separate units

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

src/muz/transforms/dl_mk_coalesce.h

@@ -0,0 +1,61 @@
+
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    dl_mk_coalesce.h
+
+Abstract:
+
+    Coalesce rules with shared bodies.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2012-10-15
+
+Revision History:
+
+--*/
+#ifndef _DL_MK_COALESCE_H_
+#define _DL_MK_COALESCE_H_
+
+#include"dl_context.h"
+#include"dl_rule_set.h"
+#include"uint_set.h"
+#include"dl_rule_transformer.h"
+#include"dl_mk_rule_inliner.h"
+
+namespace datalog {
+
+    /**
+       \brief Implements an unfolding transformation.
+    */
+    class mk_coalesce : public rule_transformer::plugin {
+        context&        m_ctx;
+        ast_manager&    m;
+        rule_manager&   rm;
+        expr_ref_vector m_sub1, m_sub2;
+        unsigned        m_idx;
+
+        void mk_pred(app_ref& pred, app* p1, app* p2);
+
+        void extract_conjs(expr_ref_vector const& sub, rule const& rl, expr_ref& result);
+
+        bool same_body(rule const& r1, rule const& r2) const;
+
+        void merge_rules(rule_ref& tgt, rule const& src);
+
+    public:
+        /**
+           \brief Create coalesced rules.
+         */
+        mk_coalesce(context & ctx);
+        
+        rule_set * operator()(rule_set const & source);
+    };
+
+};
+
+#endif /* _DL_MK_COALESCE_H_ */
+