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Author SHA1 Message Date
Steven Wan 09f2c92e5b Add info about the cherry-picked commit and contributor 2020-11-04 14:23:27 -05:00
Min-Yih Hsu bd5fe7b010 [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
 2020-10-07 14:58:36 -07:00
Eric Fiselier 7a91ac4753 Update google benchmark version 
llvm-svn: 349126
 2018-12-14 03:37:13 +00:00
Eric Fiselier 782a15a0d1 Upgrade Google Benchmark library to ToT 
llvm-svn: 346984
 2018-11-15 19:22:53 +00:00
Eric Fiselier fcafd3e600 Update google-benchark to trunk 
llvm-svn: 336635
 2018-07-10 04:02:00 +00:00
Eric Fiselier 1903976d37 Update Google Benchmark library 
llvm-svn: 322812
 2018-01-18 04:23:01 +00:00
Eric Fiselier 133a72069e Update google benchmark 
llvm-svn: 300530
 2017-04-18 07:17:20 +00:00
Eric Fiselier fbc9ff244c Upgrade in-tree google benchmark to v1.1 
llvm-svn: 286029
 2016-11-05 00:30:27 +00:00
Eric Fiselier b08d8b189c [libcxx] Add support for benchmark tests using Google Benchmark. 
Summary:
This patch does the following:

1. Checks in a copy of the Google Benchmark library into the libc++ repo under `utils/google-benchmark`.
2. Teaches libc++ how to build Google Benchmark against both (A) in-tree libc++ and (B) the platforms native STL.
3. Allows performance benchmarks to be built as part of the libc++ build.

Building the benchmarks (and Google Benchmark) is off by default. It must be enabled using the CMake option `-DLIBCXX_INCLUDE_BENCHMARKS=ON`. When this option is enabled the tests under `libcxx/benchmarks`  can be built using the `libcxx-benchmarks` target.

On Linux platforms where libstdc++ is the default STL the CMake option `-DLIBCXX_BUILD_BENCHMARKS_NATIVE_STDLIB=ON` can be used to build each benchmark test against libstdc++ as well. This is useful for comparing performance between standard libraries.

Support for benchmarks is currently very minimal. They must be manually run by the user and there is no mechanism for detecting performance regressions.

Known Issues:

* `-DLIBCXX_INCLUDE_BENCHMARKS=ON` is only supported for Clang, and not GCC, since the `-stdlib=libc++` option is needed to build Google Benchmark.








Reviewers: danalbert, dberlin, chandlerc, mclow.lists, jroelofs

Subscribers: chandlerc, dberlin, tberghammer, danalbert, srhines, hfinkel

Differential Revision: https://reviews.llvm.org/D22240

llvm-svn: 276049
 2016-07-19 23:07:03 +00:00