From dacd882383c3ef5486e4b422acfca0750abc8c84 Mon Sep 17 00:00:00 2001
From: Akash Levy <akash@silimate.com>
Date: Fri, 28 Mar 2025 17:40:40 -0700
Subject: [PATCH] Remove selectconst

---
 passes/silimate/Makefile.inc   |  1 -
 passes/silimate/selectconst.cc | 85 ----------------------------------
 2 files changed, 86 deletions(-)
 delete mode 100644 passes/silimate/selectconst.cc

diff --git a/passes/silimate/Makefile.inc b/passes/silimate/Makefile.inc
index c60e0693e..34de35452 100644
--- a/passes/silimate/Makefile.inc
+++ b/passes/silimate/Makefile.inc
@@ -9,7 +9,6 @@ OBJS += passes/silimate/longloop_select.o
 OBJS += passes/silimate/obs_clean.o
 OBJS += passes/silimate/opt_balance_tree.o
 OBJS += passes/silimate/segv.o
-OBJS += passes/silimate/selectconst.o
 OBJS += passes/silimate/splitfanout.o
 OBJS += passes/silimate/splitnetlist.o
 
diff --git a/passes/silimate/selectconst.cc b/passes/silimate/selectconst.cc
deleted file mode 100644
index c6f0643ff..000000000
--- a/passes/silimate/selectconst.cc
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- *  yosys -- Yosys Open SYnthesis Suite
- *
- *  Copyright (C) 2012  Claire Xenia Wolf <claire@yosyshq.com>
- *
- *  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 "kernel/yosys.h"
-#include "kernel/celltypes.h"
-#include "kernel/sigtools.h"
-#include <string.h>
-#include <errno.h>
-
-USING_YOSYS_NAMESPACE
-PRIVATE_NAMESPACE_BEGIN
-
-struct SelectConstPass : public Pass {
-	SelectConstPass() : Pass("selectconst", "select objects with (mostly) constant input bits") { }
-	void help() override
-	{
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    selectconst [ -frac <frac> ] {<selection>}\n");
-		log("\n");
-		log("Select cells with (mostly) constant input bits.\n");
-		log("\n");
-		log("    -frac\n");
-		log("        the fraction of constant input bits (default: 1.0).\n");
-		log("\n");
-	}
-	void execute(std::vector<std::string> args, RTLIL::Design *design) override
-	{
-		float frac = 1;
-
-		size_t argidx;
-		for (argidx = 1; argidx < args.size(); argidx++)
-		{
-			std::string arg = args[argidx];
-			if (arg == "-frac") {
-				frac = std::stof(args[++argidx]);
-				continue;
-			}
-			break;
-		}
-		extra_args(args, argidx, design);
-
-		for (auto module : design->selected_modules())
-		{
-			SigMap sigmap(module);
-
-			for (auto cell : module->selected_cells())
-			{
-				for (auto conn : cell->connections()) {
-					if (!cell->input(conn.first) || GetSize(conn.second) == 0)
-						continue;
-
-					SigPool sigpool;
-					for (int i = 0; i < GetSize(conn.second); i++) {
-						if (conn.second[i].wire == nullptr)
-							continue;
-						sigpool.add(sigmap(conn.second[i]));
-					}
-					if ((float) GetSize(sigpool) / GetSize(conn.second) >= frac) {
-						cell->set_bool_attribute("\\mostlyconst");
-						log("Marking %s as mostly constant (%d/%d bits constant).\n", log_id(cell), GetSize(sigpool), GetSize(conn.second));
-					}
-				}
-			}
-		}
-	}
-} SelectConstPass;
-
-PRIVATE_NAMESPACE_END