Krzysztof Parzyszek 3bf4aeccd6 Do not consider subreg defs as reads when computing subrange liveness ...

Subregister definitions are considered uses for the purpose of tracking
liveness of the whole register. At the same time, when calculating live
interval subranges, subregister defs should not be treated as uses.

Differential Revision: https://reviews.llvm.org/D24190

llvm-svn: 280532

2016-09-02 19:48:55 +00:00

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