/** @return The set of all basic block in this control flow graph. */
public Set<Block> getAllBlocks() {
Set<Block> visited = new HashSet<>();
Queue<Block> worklist = new LinkedList<>();
Block cur = entryBlock;
visited.add(entryBlock);
// traverse the whole control flow graph
while (true) {
if (cur == null) break;
Queue<Block> succs = new LinkedList<>();
if (cur.getType() == BlockType.CONDITIONAL_BLOCK) {
ConditionalBlock ccur = ((ConditionalBlock) cur);
succs.add(ccur.getThenSuccessor());
succs.add(ccur.getElseSuccessor());
} else {
assert cur instanceof SingleSuccessorBlock;
Block b = ((SingleSuccessorBlock) cur).getSuccessor();
if (b != null) {
succs.add(b);
}
}
if (cur.getType() == BlockType.EXCEPTION_BLOCK) {
ExceptionBlock ecur = (ExceptionBlock) cur;
for (Set<Block> exceptionSuccSet : ecur.getExceptionalSuccessors().values()) {
succs.addAll(exceptionSuccSet);
}
}
for (Block b : succs) {
if (!visited.contains(b)) {
visited.add(b);
worklist.add(b);
}
}
cur = worklist.poll();
}
return visited;
}
/**
* Get a list of all successor Blocks for cur
*
* @return a Deque of successor Blocks
*/
private Deque<Block> getSuccessors(Block cur) {
Deque<Block> succs = new LinkedList<>();
if (cur.getType() == BlockType.CONDITIONAL_BLOCK) {
ConditionalBlock ccur = ((ConditionalBlock) cur);
succs.add(ccur.getThenSuccessor());
succs.add(ccur.getElseSuccessor());
} else {
assert cur instanceof SingleSuccessorBlock;
Block b = ((SingleSuccessorBlock) cur).getSuccessor();
if (b != null) {
succs.add(b);
}
}
if (cur.getType() == BlockType.EXCEPTION_BLOCK) {
ExceptionBlock ecur = (ExceptionBlock) cur;
for (Set<Block> exceptionSuccSet : ecur.getExceptionalSuccessors().values()) {
succs.addAll(exceptionSuccSet);
}
}
return succs;
}
