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mirror of https://github.com/RPCS3/llvm.git synced 2025-01-10 22:46:25 +00:00
Andrew Trick 7c489ab365 Use a SparseSet in LiveRegUnits.
Some clients may add block live ins and may track liveness over a
large scope. This guarantees an efficient implementation in all cases
with no memory allocation/deallocation, independent of the number of
target registers. It could be slightly less convenient but is fine in
the expected case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192622 91177308-0d34-0410-b5e6-96231b3b80d8
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