/**
 * Copyright (c) 2013 Stefan Marr, stefan.marr@vub.ac.be
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package som.interpreter.nodes;

import som.interpreter.Inliner;
import som.interpreter.SArguments;
import som.vmobjects.SBlock;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.MaterializedFrame;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.ExplodeLoop;
import com.oracle.truffle.api.source.SourceSection;

public abstract class ContextualNode extends ExpressionNode {

  protected final int contextLevel;

  public ContextualNode(final int contextLevel, final SourceSection source) {
    super(source);
    this.contextLevel = contextLevel;
  }

  public final int getContextLevel() {
    return contextLevel;
  }

  public final boolean accessesOuterContext() {
    return contextLevel > 0;
  }

  @ExplodeLoop
  protected final MaterializedFrame determineContext(final VirtualFrame frame) {
    SBlock self = CompilerDirectives.unsafeCast(getLocalSelf(frame), SBlock.class, true, true);
    int i = contextLevel - 1;

    while (i > 0) {
      self = CompilerDirectives.unsafeCast(self.getOuterSelf(), SBlock.class, true, true);
      i--;
    }
    return self.getContext();
  }

  private Object getLocalSelf(final VirtualFrame frame) {
    return SArguments.rcvr(frame);
  }

  @ExplodeLoop
  protected final Object determineOuterSelf(final VirtualFrame frame) {
    Object self = getLocalSelf(frame);
    int i = contextLevel;
    while (i > 0) {
      SBlock block = CompilerDirectives.unsafeCast(self, SBlock.class, true, true);
      self = block.getOuterSelf();
      i--;
    }
    return self;
  }

  @Override
  public void replaceWithIndependentCopyForInlining(final Inliner inliner) {
    throw new RuntimeException("Needs to be specialized in concrete subclasses to make sure that localSelf slot is specialized.");
  }
}

@@ -2054,28 +2054,31 @@
 afeCast(
-getLocalSelf
+SArguments.rcvr
 (frame),
@@ -2256,32 +2256,32 @@
      i--;%0A    %7D%0A
+
     return self.
@@ -2303,436 +2303,8 @@
  %7D%0A%0A
-  private Object getLocalSelf(final VirtualFrame frame) %7B%0A    return SArguments.rcvr(frame);%0A  %7D%0A%0A  @ExplodeLoop%0A  protected final Object determineOuterSelf(final VirtualFrame frame) %7B%0A    Object self = getLocalSelf(frame);%0A    int i = contextLevel;%0A    while (i %3E 0) %7B%0A      SBlock block = CompilerDirectives.unsafeCast(self, SBlock.class, true, true);%0A      self = block.getOuterSelf();%0A      i--;%0A    %7D%0A    return self;%0A  %7D%0A%0A
   @O

Clean up ContextualNode, remove dead code