[PATCH] D22560: [Profile] add support for reading directory as input for profile merging

[David Li via llvm-commits]

davidxl created this revision.
davidxl added a reviewer: vsk.
davidxl added a subscriber: llvm-commits.

With this patch, directory name can be specified as a positional input or as part of the weighted pairs in command line or input file specification file.

This is useful for use cases where user only cares to specify the profile data directory.

https://reviews.llvm.org/D22560

Files:
  test/tools/llvm-profdata/input-dir.test
  test/tools/llvm-profdata/input-filenames.test
  tools/llvm-profdata/llvm-profdata.cpp

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