[PATCH] D15547: [PGO] Handle and report overflow during profile merge for all types of data

[Nathan Slingerland via llvm-commits]

slingn created this revision.
slingn added reviewers: davidxl, dnovillo, silvas.
slingn added a subscriber: llvm-commits.

Surface counter overflow when merging profile data. Merging still occurs on overflow but counts saturate to the maximum representable value. Overflow is reported to the user.

http://reviews.llvm.org/D15547

Files:
  include/llvm/ProfileData/InstrProf.h
  include/llvm/ProfileData/SampleProf.h
  lib/ProfileData/SampleProf.cpp
  lib/ProfileData/SampleProfReader.cpp
  test/tools/llvm-profdata/Inputs/overflow-instr.proftext
  test/tools/llvm-profdata/Inputs/overflow-sample.proftext
  test/tools/llvm-profdata/overflow-instr.test
  test/tools/llvm-profdata/overflow-sample.test
  test/tools/llvm-profdata/overflow.proftext
  tools/llvm-profdata/llvm-profdata.cpp
  unittests/ProfileData/InstrProfTest.cpp
  unittests/ProfileData/SampleProfTest.cpp

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