From 2f786fcfacfadfba7b4080a8016c7efa3ac4bd13 Mon Sep 17 00:00:00 2001
From: Alberto Gonzalez <boqwxp@airmail.cc>
Date: Mon, 29 Jun 2020 04:41:18 +0000
Subject: qbfsat: Add `-solver-option` option.

---
 passes/sat/qbfsat.cc | 15 ++++++++++++++-
 passes/sat/qbfsat.h  |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/passes/sat/qbfsat.cc b/passes/sat/qbfsat.cc
index 46f7f5070..6db7d4b64 100644
--- a/passes/sat/qbfsat.cc
+++ b/passes/sat/qbfsat.cc
@@ -215,7 +215,6 @@ QbfSolutionType call_qbf_solver(RTLIL::Module *mod, const QbfSolveOptions &opt,
 	//Execute and capture stdout from `yosys-smtbmc -s z3 -t 1 -g --binary [--dump-smt2 <file>]`
 	QbfSolutionType ret;
 	const std::string yosys_smtbmc_exe = proc_self_dirname() + "yosys-smtbmc";
-	const std::string smt2_command = stringf("write_smt2 -stbv -wires %s/problem%d.smt2", tempdir_name.c_str(), iter_num);
 	const std::string smtbmc_warning = "z3: WARNING:";
 	const std::string smtbmc_cmd = stringf("%s -s %s %s -t 1 -g --binary %s %s/problem%d.smt2 2>&1",
 			yosys_smtbmc_exe.c_str(), opt.get_solver_name().c_str(),
@@ -223,6 +222,10 @@ QbfSolutionType call_qbf_solver(RTLIL::Module *mod, const QbfSolveOptions &opt,
 			(opt.dump_final_smt2? "--dump-smt2 " + opt.dump_final_smt2_file : "").c_str(),
 			tempdir_name.c_str(), iter_num);
 
+	std::string smt2_command = "write_smt2 -stbv -wires ";
+	for (auto &solver_opt : opt.solver_options)
+		smt2_command += stringf("-solver-option %s %s ", solver_opt.first.c_str(), solver_opt.second.c_str());
+	smt2_command += stringf("%s/problem%d.smt2", tempdir_name.c_str(), iter_num);
 	Pass::call(mod->design, smt2_command);
 
 	auto process_line = [&ret, &smtbmc_warning, &opt, &quiet](const std::string &line) {
@@ -419,6 +422,13 @@ QbfSolveOptions parse_args(const std::vector<std::string> &args) {
 			}
 			continue;
 		}
+		else if (args[opt.argidx] == "-solver-option") {
+			if (args.size() <= opt.argidx + 2)
+				log_cmd_error("solver option name and value not fully specified.\n");
+			opt.solver_options.emplace(args[opt.argidx+1], args[opt.argidx+2]);
+			opt.argidx += 2;
+			continue;
+		}
 		else if (args[opt.argidx] == "-timeout") {
 			if (args.size() <= opt.argidx + 1)
 				log_cmd_error("timeout not specified.\n");
@@ -533,6 +543,9 @@ struct QbfSatPass : public Pass {
 		log("        Use a particular solver. Choose one of: \"z3\", \"yices\", and \"cvc4\".\n");
 		log("        (default: yices)\n");
 		log("\n");
+		log("    -solver-option <name> <value>\n");
+		log("        Set the specified solver option in the SMT-LIBv2 problem file.\n");
+		log("\n");
 		log("    -timeout <value>\n");
 		log("        Set the per-iteration timeout in seconds.\n");
 		log("        (default: no timeout)\n");
diff --git a/passes/sat/qbfsat.h b/passes/sat/qbfsat.h
index 401f9c7a6..c96c6f818 100644
--- a/passes/sat/qbfsat.h
+++ b/passes/sat/qbfsat.h
@@ -31,6 +31,7 @@ struct QbfSolveOptions {
 	bool nobisection = false, sat = false, unsat = false, show_smtbmc = false;
 	enum Solver{Z3, Yices, CVC4} solver = Yices;
 	enum OptimizationLevel{O0, O1, O2} oflag = O0;
+	dict<std::string, std::string> solver_options;
 	int timeout = 0;
 	std::string specialize_soln_file = "";
 	std::string write_soln_soln_file = "";
-- 
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