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Commit 4c8ca53f authored by Mark Heffernan's avatar Mark Heffernan
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Enable partial and runtime loop unrolling for NVPTX. 

Enable partial and runtime loop unrolling for NVPTX backend via
TTI::UnrollingPreferences with a small threshold. This partially unrolls
small loops which are often unrolled by the PTX to SASS compiler
and unrolling earlier can be beneficial.

llvm-svn: 242049
parent 7ccb5e23
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