[llvm-exegesis] Fix unused return value warning and add a useful error message for...
authorSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 7 Apr 2018 11:37:21 +0000 (11:37 +0000)
committerSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 7 Apr 2018 11:37:21 +0000 (11:37 +0000)
commitbc89a781b76c90ec510aff73d949f62898ee18dd
tree8d1ddff883c5d80767465d7537f88065f243845f
parentbe119ca7123c36600e0f6e569dcc7bf464040996
[llvm-exegesis] Fix unused return value warning and add a useful error message for event counter reads.

llvm-svn: 329496
llvm/tools/llvm-exegesis/lib/PerfHelper.cpp