New evaluator, more Compiler Driver cleanup

More compiler driver cleanup: Stop only has Return inputs, never an expr.  Drop extra lexical scope.  Linker table moves to CodeGen.
Replace evaluator with a simpler design; I was unable to get the current design to work with the other changes.
Updates to old eval; proper idoms; forced type checks; extensions for Fun, Return, Call, CallEnd.
Accessor find next control to execute.  Accessor for deciding when its ok to optimize a Function/Return, Call/CallEnd, Stop, ScopeMin (merge)
Add local scheduling pass.
IRPrinter uses SB instead of StringBuilder
Spelling SubF comment

2 files changed, 3 insertions, 3 deletions

diff --git a/chapter15/src/main/java/com/seaofnodes/simple/node/SubFNode.java b/chapter15/src/main/java/com/seaofnodes/simple/node/SubFNode.java
index 682930e0..335b5f10 100644
--- a/chapter15/src/main/java/com/seaofnodes/simple/node/SubFNode.java
+++ b/chapter15/src/main/java/com/seaofnodes/simple/node/SubFNode.java
@@ -1,4 +1,4 @@
-package com.seaofnodes.simple.node;
+epackage com.seaofnodes.simple.node;
 
 import com.seaofnodes.simple.type.Type;
 import com.seaofnodes.simple.type.TypeFloat;
@@ -34,7 +34,7 @@ public class SubFNode extends Node {
         Node lhs = in(1);
         Type t2 = in(2)._type;
 
-        // Sub of 1.
+        // Sub of 0.
         if ( t2.isConstant() && t2 instanceof TypeFloat i && i.value()==0 )
             return lhs;
 
diff --git a/chapter15/src/main/java/com/seaofnodes/simple/node/SubNode.java b/chapter15/src/main/java/com/seaofnodes/simple/node/SubNode.java
index 009fb30e..8ecdf13e 100644
--- a/chapter15/src/main/java/com/seaofnodes/simple/node/SubNode.java
+++ b/chapter15/src/main/java/com/seaofnodes/simple/node/SubNode.java
@@ -1,4 +1,4 @@
-package com.seaofnodes.simple.node;
+y!package com.seaofnodes.simple.node;
 
 import com.seaofnodes.simple.Parser;
 import com.seaofnodes.simple.type.Type;