llvm-project/libcxx/utils/google-benchmark/README.LLVM

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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'.