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[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)
commit55e0cda310e24c450629932fed4dd6cf437923f8
treeb3526de1fa06f5f04d643ff4c7b41643edc81ec1
parentf6621a4e4b98d602d1a6dcffb2a06f6804ade3a0
[llvm-exegesis] Fix unused return value warning and add a useful error message for event counter reads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329496 91177308-0d34-0410-b5e6-96231b3b80d8
tools/llvm-exegesis/lib/PerfHelper.cpp