Added opt -purge (frontend to opt_clean -purge)

diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc
index 8d259f34d97582e6a125321fc3c30487f5bbe585..8f4725e1c2779d5719d2c94a3a2753626765f62f 100644 (file)
--- a/passes/opt/opt.cc
+++ b/passes/opt/opt.cc
@@ -31,7 +31,7 @@ struct OptPass : public Pass {
        {
                //   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
                log("\n");
-               log("    opt [-mux_undef] [-mux_bool] [-undriven] [selection]\n");
+               log("    opt [-purge] [-mux_undef] [-mux_bool] [-undriven] [selection]\n");
                log("\n");
                log("This pass calls all the other opt_* passes in a useful order. This performs\n");
                log("a series of trivial optimizations and cleanups. This pass executes the other\n");
@@ -45,13 +45,14 @@ struct OptPass : public Pass {
                log("        opt_reduce\n");
                log("        opt_share\n");
                log("        opt_rmdff\n");
-               log("        opt_clean\n");
+               log("        opt_clean [-purge]\n");
                log("        opt_const [-mux_undef] [-mux_bool] [-undriven]\n");
                log("    while [changed design]\n");
                log("\n");
        }
        virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
        {
+               std::string opt_clean_args;
                std::string opt_const_args;
 
                log_header("Executing OPT pass (performing simple optimizations).\n");
@@ -59,6 +60,10 @@ struct OptPass : public Pass {
 
                size_t argidx;
                for (argidx = 1; argidx < args.size(); argidx++) {
+                       if (args[argidx] == "-purge") {
+                               opt_clean_args += " -purge";
+                               continue;
+                       }
                        if (args[argidx] == "-mux_undef") {
                                opt_const_args += " -mux_undef";
                                continue;
@@ -86,7 +91,7 @@ struct OptPass : public Pass {
                        Pass::call(design, "opt_reduce");
                        Pass::call(design, "opt_share");
                        Pass::call(design, "opt_rmdff");
-                       Pass::call(design, "opt_clean");
+                       Pass::call(design, "opt_clean" + opt_clean_args);
                        Pass::call(design, "opt_const" + opt_const_args);
                        if (OPT_DID_SOMETHING == false)
                                break;