[PATCH] D90320: [llvm][StringExtras] Use a lookup table for `hexDigitValue`

[Duncan P. N. Exon Smith via Phabricator via llvm-commits]

dexonsmith added a comment.

In D90320#2359587 <https://reviews.llvm.org/D90320#2359587>, @dblaikie wrote:

> If you like you could try rephrasing this as a programmatic initialization rather than writing it all out manually, might make it easier to read/look more like the original code (except applied as a loop over the range/table) and hopefully can be phrased in such a way that the compiler boils it down to the same values anyway.

Hmmm, yeah, that's better than my idea.


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