Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/simplifier_plugin.cpp

@@ -0,0 +1,46 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    simplifier_plugin.cpp
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-12-29.
+
+Revision History:
+
+--*/
+#include"simplifier_plugin.h"
+
+/**
+   \brief Copy every args[i] mult[i] times to new_args.
+*/
+void expand_args(unsigned num_args, rational const * mults, expr * const * args, ptr_buffer<expr> & new_args) {
+    for (unsigned i = 0; i < num_args; i++) {
+        rational const & c = mults[i];
+        SASSERT(c.is_int());
+        rational j(0);
+        while (j < c) {
+            new_args.push_back(args[i]);
+            j++;
+        }
+    }
+}
+
+bool simplifier_plugin::reduce(func_decl * f, unsigned num_args, rational const * mults, expr * const * args, expr_ref & result) {
+    set_reduce_invoked();
+    if (f->is_idempotent()) {
+        return reduce(f, num_args, args, result);
+    }
+    else {
+        ptr_buffer<expr> new_args;
+        expand_args(num_args, mults, args, new_args);
+        return reduce(f, new_args.size(), new_args.c_ptr(), result);
+    }
+}