[PATCH] D41152: Use a custom container to reduce AFDO's memory usage by ~60%

[George Burgess IV via Phabricator via llvm-commits]

george.burgess.iv updated this revision to Diff 127018.
george.burgess.iv marked 2 inline comments as done.
george.burgess.iv added a comment.

Addressed feedback; thanks!

Also, I made `FunctionSamplesMap`'s key a `std::string`, so this is as close to NFC as possible. Doing so is a bit pricey, but we're still left with a 50-55% memory reduction. If we want, we can swap to `StringRef` in its own CL.


https://reviews.llvm.org/D41152

Files:
  include/llvm/ADT/TinyAssociativeVector.h
  include/llvm/ProfileData/SampleProf.h
  lib/ProfileData/SampleProf.cpp
  lib/ProfileData/SampleProfWriter.cpp
  lib/Transforms/IPO/SampleProfile.cpp
  test/tools/llvm-profdata/sample-profile-basic.test
  unittests/ADT/CMakeLists.txt
  unittests/ADT/TinyAssociativeVectorTest.cpp

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