More extensive stats about generated trees

Author: odersky

src/dotty/tools/dotc/Run.scala

@@ -82,6 +82,9 @@ class Run(comp: Compiler)(implicit ctx: Context) {
         ctx.informTime(s"$phase ", start)
       }
     if (!ctx.reporter.hasErrors) Rewrites.writeBack()
+    for (unit <- units)
+      Stats.record("retained typed trees at end", unit.tpdTree.treeSize)
+    Stats.record("total trees at end", ast.Trees.ntrees)
   }
 
   private sealed trait PrintedTree

src/dotty/tools/dotc/typer/FrontEnd.scala

@@ -49,8 +49,8 @@ class FrontEnd extends Phase {
     val unit = ctx.compilationUnit
     unit.tpdTree = ctx.typer.typedExpr(unit.untpdTree)
     typr.println("typed: " + unit.source)
-    record("retainedUntypedTrees", unit.untpdTree.treeSize)
-    record("retainedTypedTrees", unit.tpdTree.treeSize)
+    record("retained untyped trees", unit.untpdTree.treeSize)
+    record("retained typed trees after typer", unit.tpdTree.treeSize)
   }
 
   private def firstTopLevelDef(trees: List[tpd.Tree])(implicit ctx: Context): Symbol = trees match {
@@ -72,7 +72,7 @@ class FrontEnd extends Phase {
     record("parsedTrees", ast.Trees.ntrees)
     unitContexts foreach (enterSyms(_))
     unitContexts foreach (typeCheck(_))
-    record("totalTrees", ast.Trees.ntrees)
+    record("total trees after typer", ast.Trees.ntrees)
     unitContexts.map(_.compilationUnit).filterNot(discardAfterTyper)
   }