From 77cfdbf05cafa78946a5684a0e4a530ebecd6547 Mon Sep 17 00:00:00 2001
From: Adam Izraelevitz
Date: Wed, 9 May 2018 10:19:45 -0700
Subject: Bugfix: ports of a temporary name would break const-prop (#806)

---
 src/main/scala/firrtl/transforms/ConstantPropagation.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/main')

diff --git a/src/main/scala/firrtl/transforms/ConstantPropagation.scala b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
index c417357b..60d9ac2c 100644
--- a/src/main/scala/firrtl/transforms/ConstantPropagation.scala
+++ b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
@@ -347,7 +347,7 @@ class ConstantPropagation extends Transform {
     // When propagating a reference, check if we want to keep the name that would be deleted
     def propagateRef(lname: String, value: Expression): Unit = {
       value match {
-        case WRef(rname,_,_,_) if betterName(lname, rname) && !swapMap.contains(rname) =>
+        case WRef(rname,_,kind,_) if betterName(lname, rname) && !swapMap.contains(rname) && kind != PortKind =>
           assert(!swapMap.contains(lname)) // <- Shouldn't be possible because lname is either a
           // node declaration or the single connection to a wire or register
           swapMap += (lname -> rname, rname -> lname)
-- 
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