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Updated perf support.

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@danielcdh danielcdh released this 14 Jan 16:48
· 241 commits to master since this release
Generate a binary-encoded profile for LLVM profiles.

This changes the LLVM profile writer to use a more compact binary
encoding, as supported in upstream LLVM as of

http://llvm.org/viewvc/llvm-project?rev=250539&view=rev

This change breaks compatibility with previous versions. To dump the
generated file, you will need to use the llvm-profdata tool in LLVM.
Make sure to get a version of llvm-profdata at at least revision 250539.