1 files changed, 62 insertions, 0 deletions
diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc
new file mode 100644
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+++ b/passes/opt/opt.cc
@@ -0,0 +1,62 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "opt_status.h"
+#include "kernel/register.h"
+#include "kernel/log.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+bool OPT_DID_SOMETHING;
+
+struct OptPass : public Pass {
+	OptPass() : Pass("opt") { }
+	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
+	{
+		log_header("Executing OPT pass (performing simple optimizations).\n");
+		log_push();
+
+		extra_args(args, 1, design);
+
+		log_header("Optimizing in-memory representation of design.\n");
+		design->optimize();
+
+		Pass::call(design, "opt_const");
+		Pass::call(design, "opt_share -nomux");
+		while (1) {
+			OPT_DID_SOMETHING = false;
+			Pass::call(design, "opt_muxtree");
+			Pass::call(design, "opt_reduce");
+			Pass::call(design, "opt_share");
+			Pass::call(design, "opt_rmdff");
+			Pass::call(design, "opt_rmunused");
+			Pass::call(design, "opt_const");
+			if (OPT_DID_SOMETHING == false)
+				break;
+			log_header("Rerunning OPT passes. (Maybe there is more to do..)\n");
+		}
+
+		log_header("Optimizing in-memory representation of design.\n");
+		design->optimize();
+
+		log_header("Finished OPT passes. (There is nothing left to do.)\n");
+		log_pop();
+	}
+} OptPass;
+