[PATCH] D59475: [ConstantRange] Add fromKnownBits() method

[Nikita Popov via Phabricator via llvm-commits]

nikic created this revision.
nikic added reviewers: lebedev.ri, spatel.
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Following the suggestion in D59450 <https://reviews.llvm.org/D59450>, I'm moving the code for constructing a ConstantRange from KnownBits out of ValueTracking, which also allows us to add a couple of unit tests...

I'm adding this method to ConstantRange rather than KnownBits (which would have been a bit nicer) to avoid creating a dependency from Support to IR, where ConstantRange lives.

PS: C++14 binary literals would be great for these kinds of tests...


Repository:
  rL LLVM

https://reviews.llvm.org/D59475

Files:
  llvm/include/llvm/IR/ConstantRange.h
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/lib/IR/ConstantRange.cpp
  llvm/unittests/IR/ConstantRangeTest.cpp

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