[PATCH] D14893: [llvm-profdata] Change instr prof counter overflow to saturate rather than discard

[Nathan Slingerland via llvm-commits]

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

This changes overflow handling during instrumentation profile merge. Rathar than throwing away records that would result in counter overflow, merged counts are instead clamped to the maximum representable value. A warning about counter overflow is still surfaced to the user as before.

http://reviews.llvm.org/D14893

Files:
  include/llvm/ProfileData/InstrProf.h
  lib/ProfileData/InstrProfWriter.cpp
  test/tools/llvm-profdata/overflow.proftext
  unittests/ProfileData/InstrProfTest.cpp

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