Only enable CSE with --cse flag

ucb-bar · Jan 31, 2014 · 5c3fc63 · 5c3fc63
1 parent cb10cc9
commit 5c3fc63
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diff --git a/src/main/scala/Backend.scala b/src/main/scala/Backend.scala
@@ -275,6 +275,7 @@ abstract class Backend {
 
   val preElaborateTransforms = ArrayBuffer[(Module) => Unit]()
   val transforms = ArrayBuffer[(Module) => Unit]()
+  if (Module.isCSE) transforms += CSE.transform
   val analyses = ArrayBuffer[(Module) => Unit]()
 
   def initializeDFS: Stack[Node] = {

diff --git a/src/main/scala/Module.scala b/src/main/scala/Module.scala
@@ -57,6 +57,7 @@ object Module {
   var saveComponentTrace = false
   var dontFindCombLoop = false
   var isDebug = false;
+  var isCSE = false
   var isIoDebug = true;
   var isClockGatingUpdates = false;
   var isClockGatingUpdatesInline = false;

diff --git a/src/main/scala/hcl.scala b/src/main/scala/hcl.scala
@@ -136,6 +136,7 @@ object chiselMain {
         case "--noCombLoop" => Module.dontFindCombLoop = true
         case "--genHarness" => Module.isGenHarness = true;
         case "--debug" => Module.isDebug = true;
+        case "--cse" => Module.isCSE = true
         case "--ioDebug" => Module.isIoDebug = true;
         case "--noIoDebug" => Module.isIoDebug = false;
         case "--clockGatingUpdates" => Module.isClockGatingUpdates = true;