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[System Model] [TTI] Move default cache/prefetch implementations

Authored by greened on Oct 10 2019, 1:39 PM.

Description

[System Model] [TTI] Move default cache/prefetch implementations

Move the default implementations of cache and prefetch queries to
TargetTransformInfoImplBase and delete them from NoTIIImpl. This brings these
interfaces in line with how other TTI interfaces work.

Differential Revision: https://reviews.llvm.org/D68804

llvm-svn: 374446

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