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comparison graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeUtil.java @ 11809:c7769440afd8

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improve NodeUtil.cloneNode.
author Andreas Woess <andreas.woess@jku.at>
date Wed, 25 Sep 2013 17:34:01 +0200
parents e8dfad9a424f
children 099af41815ea
comparison
equal deleted inserted replaced
11808:0c4d7b468dd7 11809:c7769440afd8
290 } 290 }
291 } 291 }
292 292
293 @SuppressWarnings("unchecked") 293 @SuppressWarnings("unchecked")
294 public static <T extends Node> T cloneNode(T orig) { 294 public static <T extends Node> T cloneNode(T orig) {
295 Class<? extends Node> clazz = orig.getClass(); 295 final Node clone = orig.copy();
296 NodeClass nodeClass = NodeClass.get(clazz); 296 NodeClass nodeClass = NodeClass.get(clone.getClass());
297 Node clone = orig.copy();
298 if (clone == null) {
299 return null;
300 }
301 297
302 unsafe.putObject(clone, nodeClass.parentOffset, null); 298 unsafe.putObject(clone, nodeClass.parentOffset, null);
303 299
304 for (long fieldOffset : nodeClass.childOffsets) { 300 for (long fieldOffset : nodeClass.childOffsets) {
305 Node child = (Node) unsafe.getObject(orig, fieldOffset); 301 Node child = (Node) unsafe.getObject(orig, fieldOffset);
306 if (child != null) { 302 if (child != null) {
307 Node clonedChild = cloneNode(child); 303 Node clonedChild = cloneNode(child);
308 if (clonedChild == null) {
309 return null;
310 }
311
312 unsafe.putObject(clonedChild, nodeClass.parentOffset, clone); 304 unsafe.putObject(clonedChild, nodeClass.parentOffset, clone);
313 unsafe.putObject(clone, fieldOffset, clonedChild); 305 unsafe.putObject(clone, fieldOffset, clonedChild);
314 } 306 }
315 } 307 }
316 for (long fieldOffset : nodeClass.childrenOffsets) { 308 for (long fieldOffset : nodeClass.childrenOffsets) {
317 Node[] children = (Node[]) unsafe.getObject(orig, fieldOffset); 309 Node[] children = (Node[]) unsafe.getObject(orig, fieldOffset);
318 if (children != null) { 310 if (children != null) {
319 Node[] clonedChildren = children.clone(); 311 Node[] clonedChildren = (Node[]) Array.newInstance(children.getClass().getComponentType(), children.length);
320 Arrays.fill(clonedChildren, null);
321 for (int i = 0; i < children.length; i++) { 312 for (int i = 0; i < children.length; i++) {
322 Node clonedChild = cloneNode(children[i]); 313 if (children[i] != null) {
323 if (clonedChild == null) { 314 Node clonedChild = cloneNode(children[i]);
324 return null; 315 clonedChildren[i] = clonedChild;
316 unsafe.putObject(clonedChild, nodeClass.parentOffset, clone);
325 } 317 }
326
327 clonedChildren[i] = clonedChild;
328 unsafe.putObject(clonedChild, nodeClass.parentOffset, clone);
329 } 318 }
330 unsafe.putObject(clone, fieldOffset, clonedChildren); 319 unsafe.putObject(clone, fieldOffset, clonedChildren);
331 } 320 }
332 } 321 }
333 return (T) clone; 322 return (T) clone;