Add a BasicBlockWorkqueue as a common utility.
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@swift-ci please test and merge |
The pattern of using a breadth-first traversal over a control-flow graph shows up in a few places within the SIL optimizer, so this data-structure unifies those manually-implemented traversals into a common utility.
also simplifies the logic of the search quite a bit.
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@swift-ci please test and merge |
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The pattern of using a breadth-first traversal over a control-flow graph shows up in a few places within the SIL optimizer, so this data-structure unifies those manually-implemented traversals into a common utility.