Joshua Cao 0bc98349c8 [LICM] Use DomTreeUpdater version of SplitBlockPredecessors, nfc (#107190) ...

The DominatorTree version is marked for deprecation, so we use the
DomTreeUpdater version. We also update sinkRegion() to iterate over
basic blocks instead of DomTreeNodes. The loop body calls
SplitBlockPredecessors. The DTU version calls
DomTreeUpdater::apply_updates(), which may call DominatorTree::reset().
This invalidates the worklist of DomTreeNodes to iterate over.

2024-09-29 21:28:45 -07:00

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