[PATCH] D79418: [LSR][ARM] Add new TTI hook to discard unwanted LSRUses

[Sam Parker via Phabricator via llvm-commits]

samparker added inline comments.


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Comment at: llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp:5598
 
+  FilterOutUndesirableUses();
   FilterOutUndesirableDedicatedRegisters();
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How about doing the filtering straight away, even before 'OptimizeShadowIV'? Can we just remove the instruction before we generate any formulae?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D79418/new/

https://reviews.llvm.org/D79418