From dc26ba8c44e3571b90c275ca00a1d7ac348dc443 Mon Sep 17 00:00:00 2001
From: Asherah Connor <ashe@kivikakk.ee>
Date: Fri, 28 Jun 2024 17:17:15 +0300
Subject: [PATCH] cxxrtl: only write "opt" out when actually opt; write "noopt"
 otherwise.

---
 niar/cxxrtl.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/niar/cxxrtl.py b/niar/cxxrtl.py
index baed800..246ddfa 100644
--- a/niar/cxxrtl.py
+++ b/niar/cxxrtl.py
@@ -138,7 +138,11 @@ def main(np: Project, args):
             f.write(f"read_rtlil {_make_absolute(il_path)}\n")
             if args.optimize.opt_rtl:
                 f.write("opt\n")
-            f.write(f"write_rtlil {_make_absolute(il_path)}.opt\n")
+                f.write(f"write_rtlil {_make_absolute(il_path)}.opt\n")
+            else:
+                # Allow apples-to-apples comparison of generated RTLIL by
+                # rewriting it with Yosys.
+                f.write(f"write_rtlil {_make_absolute(il_path)}.noopt\n")
             f.write(f"write_cxxrtl -header {_make_absolute(cxxrtl_cc_path)}\n")
 
         def rtlil_to_cc():