[Truffle] More integration of Enumerable and remove old shims.

core/src/main/ruby/jruby/truffle/core.rb

@@ -15,7 +15,6 @@
 require_relative 'core/rubinius/api/shims/rubinius'
 require_relative 'core/rubinius/api/shims/lookuptable'
 require_relative 'core/rubinius/api/shims/thread'
-require_relative 'core/rubinius/api/shims/enumerator'
 require_relative 'core/rubinius/api/shims/undefined'
 require_relative 'core/rubinius/api/shims/metrics'
 

truffle/src/main/java/org/jruby/truffle/nodes/core/ArrayNodes.java

@@ -1373,6 +1373,8 @@ public Object deleteAtIntegerFixnum(RubyArray array, int index) {
     @ImportGuards(ArrayGuards.class)
     public abstract static class EachNode extends YieldingCoreMethodNode {
 
+        @Child private CallDispatchHeadNode toEnumNode;
+
         private final BranchProfile breakProfile = BranchProfile.create();
         private final BranchProfile nextProfile = BranchProfile.create();
         private final BranchProfile redoProfile = BranchProfile.create();
@@ -1383,6 +1385,17 @@ public EachNode(RubyContext context, SourceSection sourceSection) {
 
         public EachNode(EachNode prev) {
             super(prev);
+            toEnumNode = prev.toEnumNode;
+        }
+
+        @Specialization
+        public Object eachEnumerator(VirtualFrame frame, RubyArray array, UndefinedPlaceholder block) {
+            if (toEnumNode == null) {
+                CompilerDirectives.transferToInterpreter();
+                toEnumNode = insert(DispatchHeadNodeFactory.createMethodCall(getContext()));
+            }
+
+            return toEnumNode.call(frame, array, "to_enum", null, getContext().getCoreLibrary().getEachSymbol());
         }
 
         @Specialization(guards = "isNull")

truffle/src/main/java/org/jruby/truffle/runtime/core/CoreLibrary.java

@@ -125,6 +125,8 @@ public class CoreLibrary {
     private ArrayNodes.MinBlock arrayMinBlock;
     private ArrayNodes.MaxBlock arrayMaxBlock;
 
+    @CompilerDirectives.CompilationFinal private RubySymbol eachSymbol;
+
     public CoreLibrary(RubyContext context) {
         this.context = context;
     }
@@ -387,6 +389,10 @@ public void initialize() {
         Object value = context.getRuntime().warningsEnabled() ? context.getRuntime().isVerbose() : nilObject;
         RubyNode.notDesignedForCompilation();
         globalVariablesObject.getOperations().setInstanceVariable(globalVariablesObject, "$VERBOSE", value);
+
+        // Common symbols
+
+        eachSymbol = getContext().getSymbolTable().getSymbol("each");
     }
 
     public void initializeAfterMethodsAdded() {
@@ -986,4 +992,8 @@ public RubyClass getComplexClass() {
     public RubyClass getByteArrayClass() {
         return byteArrayClass;
     }
+
+    public RubySymbol getEachSymbol() {
+        return eachSymbol;
+    }
 }