libcxx/utils/google-benchmark/README.LLVM

LLVM notes
----------

This directory contains the Google Benchmark source code with some unnecessary
files removed. Note that this directory is under a different license than
libc++.

Changes:
* https://github.com/google/benchmark/commit/4abdfbb802d1b514703223f5f852ce4a507d32d2
  is applied on top of
  https://github.com/google/benchmark/commit/4528c76b718acc9b57956f63069c699ae21edcab
  to add RISC-V timer support.
* https://github.com/google/benchmark/commit/8e48105d465c586068dd8e248fe75a8971c6ba3a
  is applied on top of
  https://github.com/google/benchmark/commit/4528c76b718acc9b57956f63069c699ae21edcab
  to fix cross-build from linux to windows via MinGW.
* https://github.com/google/benchmark/commit/a77d5f70efaebe2b7e8c10134526a23a7ce7ef35
  and
  https://github.com/google/benchmark/commit/ecc1685340f58f7fe6b707036bc0bb1fccabb0c1
  are applied on top of
  https://github.com/google/benchmark/commit/8e48105d465c586068dd8e248fe75a8971c6ba3a
  to fix timestamp-related inline asm issues and 32-bit RISC-V build failures.
  The second cherrypicked commit fixes formatting issues introduced by the
  preceding change.
* https://github.com/google/benchmark/commit/ffe1342eb2faa7d2e7c35b4db2ccf99fab81ec20
  is applied to add the CycleTimer implementation for M680x0
* https://github.com/google/benchmark/commit/d9abf017632be4a00b92cf4289539b353fcea5d2
  is applied to rename 'mftbl' to 'mftb'.