[PATCH] D58736: [System Model] Introduce a target system model

[Simon Moll via Phabricator via llvm-commits]

simoll added a comment.

This takes a while to digest. Some quick remarks for now (also inline):

- Is there a way to query the number of (automatic) HW prefetchers?
- Does the interface provide the latency of each cache level (hit)/memory (miss)?



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Comment at: llvm/include/llvm/Analysis/TargetTransformInfoImpl.h:407
+
+  unsigned getMaxPrefetchIterationsAhead() const { return UINT_MAX; }
 
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What is this method supposed to return?
The right value seems to be a property of a specific pair of a loop and a target architecture rather than just the target alone.


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  https://reviews.llvm.org/D58736/new/

https://reviews.llvm.org/D58736