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[M680x0] Add google/benchmark's CycleTimer support for M68K

Authored by myhsu on Oct 5 2020, 8:24 PM.

Description

[M680x0] Add google/benchmark's CycleTimer support for M68K

This is a cherrypick of the upstream fix commit ffe1342 onto
llvm/utils/benchmark and libcxx/utils/google-benchmark.
This adds CycleTimer implementation for M680x0, which simply
uses gettimeofday same as MIPS.

Differential Review: https://reviews.llvm.org/D88868

Details

Committed
myhsuOct 7 2020, 2:58 PM
Parents
rG297655c123b3: [NFC][regalloc] Use MCRegister instead of unsigned in InterferenceCache
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