[PATCH] D69387: [ConstantRange] Add toKnownBits() method

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri marked an inline comment as done.
lebedev.ri added inline comments.


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Comment at: llvm/lib/IR/ConstantRange.cpp:103
+      return Bit;
+    }
+    llvm_unreachable("Must have found bit mismatch.");
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nikic wrote:
> Rather than looping over bits, which seems rather expensive to me, I'd suggest expressing this in terms of `(V0 ^ V1).countLeadingZeros()`.
This is the brute-force approach, i'm sinking it into APIntOps with proper implementation...


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https://reviews.llvm.org/D69387