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author | Stephen Hines <srhines@google.com> | 2014-04-23 16:57:46 -0700 |
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committer | Stephen Hines <srhines@google.com> | 2014-04-24 15:53:16 -0700 |
commit | 36b56886974eae4f9c5ebc96befd3e7bfe5de338 (patch) | |
tree | e6cfb69fbbd937f450eeb83bfb83b9da3b01275a /lib/ProfileData/InstrProfWriter.cpp | |
parent | 69a8640022b04415ae9fac62f8ab090601d8f889 (diff) | |
download | external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.zip external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.tar.gz external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.tar.bz2 |
Update to LLVM 3.5a.
Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617
Diffstat (limited to 'lib/ProfileData/InstrProfWriter.cpp')
-rw-r--r-- | lib/ProfileData/InstrProfWriter.cpp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/lib/ProfileData/InstrProfWriter.cpp b/lib/ProfileData/InstrProfWriter.cpp new file mode 100644 index 0000000..3024f96 --- /dev/null +++ b/lib/ProfileData/InstrProfWriter.cpp @@ -0,0 +1,60 @@ +//=-- InstrProfWriter.cpp - Instrumented profiling writer -------------------=// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains support for writing profiling data for clang's +// instrumentation based PGO and coverage. +// +//===----------------------------------------------------------------------===// + +#include "llvm/ProfileData/InstrProfWriter.h" +#include "llvm/Support/Endian.h" + +using namespace llvm; + +error_code InstrProfWriter::addFunctionCounts(StringRef FunctionName, + uint64_t FunctionHash, + ArrayRef<uint64_t> Counters) { + auto Where = FunctionData.find(FunctionName); + if (Where == FunctionData.end()) { + // If this is the first time we've seen this function, just add it. + auto &Data = FunctionData[FunctionName]; + Data.Hash = FunctionHash; + Data.Counts = Counters; + return instrprof_error::success;; + } + + auto &Data = Where->getValue(); + // We can only add to existing functions if they match, so we check the hash + // and number of counters. + if (Data.Hash != FunctionHash) + return instrprof_error::hash_mismatch; + if (Data.Counts.size() != Counters.size()) + return instrprof_error::count_mismatch; + // These match, add up the counters. + for (size_t I = 0, E = Counters.size(); I < E; ++I) { + if (Data.Counts[I] + Counters[I] < Data.Counts[I]) + return instrprof_error::counter_overflow; + Data.Counts[I] += Counters[I]; + } + return instrprof_error::success; +} + +void InstrProfWriter::write(raw_ostream &OS) { + // Write out the counts for each function. + for (const auto &I : FunctionData) { + StringRef Name = I.getKey(); + uint64_t Hash = I.getValue().Hash; + const std::vector<uint64_t> &Counts = I.getValue().Counts; + + OS << Name << "\n" << Hash << "\n" << Counts.size() << "\n"; + for (uint64_t Count : Counts) + OS << Count << "\n"; + OS << "\n"; + } +} |