tree c704cf48bc374f1a9f3b84b5a7ade4198ba13b14
parent 84513dbf89ba561783184083fe6cb70547db46d2
author Hans Wennborg <hans@hanshq.net> 1570611990 +0000
committer Hans Wennborg <hans@hanshq.net> 1570611990 +0000

Unify the two CRC implementations

David added the JamCRC implementation in r246590. More recently, Eugene
added a CRC-32 implementation in r357901, which falls back to zlib's
crc32 function if present.

These checksums are essentially the same, so having multiple
implementations seems unnecessary. This replaces the CRC-32
implementation with the simpler one from JamCRC, and implements the
JamCRC interface in terms of CRC-32 since this means it can use zlib's
implementation when available, saving a few bytes and potentially making
it faster.

JamCRC took an ArrayRef<char> argument, and CRC-32 took a StringRef.
This patch changes it to ArrayRef<uint8_t> which I think is the best
choice, and simplifies a few of the callers nicely.

Differential revision: https://reviews.llvm.org/D68570

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@374148 91177308-0d34-0410-b5e6-96231b3b80d8