[PATCH] D25687: [PGO] fix bogus warning for merging empty llvm profile file

[Rong Xu via llvm-commits]

xur updated this revision to Diff 75233.
xur added a comment.

Followed vsk's suggestion to use a new error code for empty file case.
Note that this does not apply to indexed profile where we don't expected empty file (in which case, we will report a format error).

Also changed to use 'touch' rather than the empty profile in Inputs (suggested by david).

-Rong


https://reviews.llvm.org/D25687

Files:
  include/llvm/ProfileData/InstrProf.h
  lib/ProfileData/InstrProf.cpp
  lib/ProfileData/InstrProfReader.cpp
  test/tools/llvm-profdata/Inputs/IR_profile.proftext
  test/tools/llvm-profdata/Inputs/clang_profile.proftext
  test/tools/llvm-profdata/merge_empty_profile.test
  tools/llvm-profdata/llvm-profdata.cpp

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