Added some comments

3 files changed, 6 insertions, 4 deletions

diff --git a/src/main/scala/firrtl/IR.scala b/src/main/scala/firrtl/IR.scala
index 1e7c4ced..3dbf3dae 100644
--- a/src/main/scala/firrtl/IR.scala
+++ b/src/main/scala/firrtl/IR.scala
@@ -9,6 +9,10 @@ package firrtl
 import scala.collection.Seq
 
 // Should this be defined elsewhere?
+/*
+Structure containing source locator information.
+Member of most Stmt case classes.
+*/
 trait Info
 case object NoInfo extends Info
 case class FileInfo(file: String, line: Int, column: Int) extends Info {
diff --git a/src/main/scala/firrtl/Parser.scala b/src/main/scala/firrtl/Parser.scala
index 00cd110e..98864e92 100644
--- a/src/main/scala/firrtl/Parser.scala
+++ b/src/main/scala/firrtl/Parser.scala
@@ -22,7 +22,7 @@ object Parser
     val tokens = new CommonTokenStream(lexer)
     val parser = new FIRRTLParser(tokens)
 
-    // FIXME Dangerous
+    // FIXME Dangerous (TODO)
     parser.getInterpreter.setPredictionMode(PredictionMode.SLL)
 
     // Concrete Syntax Tree
diff --git a/src/main/scala/firrtl/Passes.scala b/src/main/scala/firrtl/Passes.scala
index f64d67bb..7694fa9d 100644
--- a/src/main/scala/firrtl/Passes.scala
+++ b/src/main/scala/firrtl/Passes.scala
@@ -34,9 +34,7 @@ object Passes {
    *    and passing an environment to all statements in pre-order
    *    traversal, and resolving types in expressions in post-
    *    order traversal.
-   *  Type propagation for primary ops are defined here.
-   *  Notable cases: LetRec requires updating environment before
-   *    resolving the subexpressions in its elements.
+   *  Type propagation for primary ops are defined in Primops.scala.
    *  Type errors are not checked in this pass, as this is
    *    postponed for a later/earlier pass.
    */