[PATCH] D146217: [ValueTracking] Support vscale in computeConstantRange()

[Nikita Popov via Phabricator via llvm-commits]

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Add support for vscale in computeConstantRange(), based on vscale_range attributes. This allows simplifying based on the precise range, rather than a KnownBits approximation (which will be off by a factor of two for the usual case of a power of two upper bound).


https://reviews.llvm.org/D146217

Files:
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/test/Transforms/InstCombine/icmp-vscale.ll

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