[ADT] Add a generic breadth-first-search graph iterator.

Description

[ADT] Add a generic breadth-first-search graph iterator.

This will be used in LCSSA to speed up the canonicalization.

Differential Revision: https://reviews.llvm.org/D31694

Details

Committed
davideApr 6 2017, 10:03 AM
Differential Revision
D31694: [ADT] Generic BFS graph iterator
Parents
rL299659: [AMDGPU] Eliminate barrier if workgroup size is not greater than wavefront size
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