BlockStates DataFlowPass::runOnBlocks(const BlockVector& blocks) {
BlockStates states;
// First pass: precompute generate and kill sets.
initStates(blocks, states);
// iterate for a forwards pass
if (_direction == FORWARDS) {
const BasicBlock* start = blocks.front();
traverseForwards(start, states);
}
// iterate for a backwards pass
else if (_direction == BACKWARDS) {
const BasicBlock* start = blocks.back();
traverseBackwards(start, states);
}
return states;
}
