[PATCH] D44847: [profile] Fix value profile runtime merging issues

[Rong Xu via Phabricator via llvm-commits]

xur updated this revision to Diff 140479.
xur added a comment.

This is the updated patch.  It fixed some issues in previous patch. It also adds a new API for updating value-count in batch mode. Without this, PGO instrumented Clang incurs 20x slow down in building itself (with %9m prefix -- with %m is even greater slowdown ).


https://reviews.llvm.org/D44847

Files:
  lib/profile/InstrProfiling.h
  lib/profile/InstrProfilingFile.c
  lib/profile/InstrProfilingMerge.c
  lib/profile/InstrProfilingMergeFile.c
  lib/profile/InstrProfilingValue.c
  test/profile/instrprof-value-merge.c

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