From 7819dc69a4dff8a4eb293548c88a626e613cf096 Mon Sep 17 00:00:00 2001
From: Jerry Zhao <jerryz123@berkeley.edu>
Date: Thu, 19 Oct 2023 10:33:50 -0700
Subject: [PATCH] Emit a empty HammerIR JSON when no macros to avoid downstream
 tool problems

---
 src/main/scala/barstools/macros/MacroCompiler.scala | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/main/scala/barstools/macros/MacroCompiler.scala b/src/main/scala/barstools/macros/MacroCompiler.scala
index 6bcd06c5..459992f2 100644
--- a/src/main/scala/barstools/macros/MacroCompiler.scala
+++ b/src/main/scala/barstools/macros/MacroCompiler.scala
@@ -950,6 +950,14 @@ object MacroCompiler extends App {
             verilogWriter.close()
           case None =>
         }
+        params.get(HammerIR) match {
+          case Some(hammerIRFile: String) =>
+            // Create an empty HammerIR file
+            val hammerIRWriter = new FileWriter(new File(hammerIRFile))
+            hammerIRWriter.write("[]\n")
+            hammerIRWriter.close()
+          case None =>
+        }
       }
     } catch {
       case e: java.util.NoSuchElementException =>