V4 IR: change basic-block cleanup to remove unreachable cycles too.

The previous version left unreachable cycles untouched. For example in:

function f() {
  if (false)
    while (true) { doSomething(); }
  anotherThing();
}

The edge to the then-part would be removed, but the loop itself would
not be removed. This resulted in the basic-block scheduler choking when
hitting the block with the anotherThing() call, because it wants to have
all blocks from incoming edges resolved first.

Task-number: QTBUG-34776
Change-Id: I5b3a79140e6058c4ade4ec7687c1a795f1a74f97
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>

0 files changed, 0 insertions, 0 deletions