#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/OnDiskHashTable.h"
+#include <tuple>
using namespace llvm;
namespace {
+static support::endianness ValueProfDataEndianness = support::little;
+
class InstrProfRecordTrait {
public:
typedef StringRef key_type;
typedef uint64_t offset_type;
static hash_value_type ComputeHash(key_type_ref K) {
- return IndexedInstrProf::ComputeHash(IndexedInstrProf::HashType, K);
+ return IndexedInstrProf::ComputeHash(K);
}
static std::pair<offset_type, offset_type>
offset_type M = 0;
for (const auto &ProfileData : *V) {
+ const InstrProfRecord &ProfRecord = ProfileData.second;
M += sizeof(uint64_t); // The function hash
M += sizeof(uint64_t); // The size of the Counts vector
- M += ProfileData.second.Counts.size() * sizeof(uint64_t);
+ M += ProfRecord.Counts.size() * sizeof(uint64_t);
// Value data
- M += sizeof(uint64_t); // Number of value kinds with value sites.
- for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
- const std::vector<InstrProfValueSiteRecord> &ValueSites =
- ProfileData.second.getValueSitesForKind(Kind);
- if (ValueSites.empty())
- continue;
- M += sizeof(uint64_t); // Value kind
- M += sizeof(uint64_t); // The number of value sites for given value kind
- for (InstrProfValueSiteRecord I : ValueSites) {
- M += sizeof(uint64_t); // Number of value data pairs at a value site
- M += 2 * sizeof(uint64_t) * I.ValueData.size(); // Value data pairs
- }
- }
+ M += ValueProfData::getSize(ProfileData.second);
}
LE.write<offset_type>(M);
using namespace llvm::support;
endian::Writer<little> LE(Out);
for (const auto &ProfileData : *V) {
+ const InstrProfRecord &ProfRecord = ProfileData.second;
+
LE.write<uint64_t>(ProfileData.first); // Function hash
- LE.write<uint64_t>(ProfileData.second.Counts.size());
- for (uint64_t I : ProfileData.second.Counts)
+ LE.write<uint64_t>(ProfRecord.Counts.size());
+ for (uint64_t I : ProfRecord.Counts)
LE.write<uint64_t>(I);
- // Compute the number of value kinds with value sites.
- uint64_t NumValueKinds = 0;
- for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind)
- NumValueKinds +=
- !(ProfileData.second.getValueSitesForKind(Kind).empty());
- LE.write<uint64_t>(NumValueKinds);
-
// Write value data
- for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
- const std::vector<InstrProfValueSiteRecord> &ValueSites =
- ProfileData.second.getValueSitesForKind(Kind);
- if (ValueSites.empty())
- continue;
- LE.write<uint64_t>(Kind); // Write value kind
- // Write number of value sites for current value kind
- LE.write<uint64_t>(ValueSites.size());
- for (InstrProfValueSiteRecord I : ValueSites) {
- // Write number of value data pairs at this value site
- LE.write<uint64_t>(I.ValueData.size());
- for (auto V : I.ValueData) {
- if (Kind == IPVK_IndirectCallTarget)
- LE.write<uint64_t>(ComputeHash((const char *)V.first));
- else
- LE.write<uint64_t>(V.first);
- LE.write<uint64_t>(V.second);
- }
- }
- }
+ std::unique_ptr<ValueProfData> VDataPtr =
+ ValueProfData::serializeFrom(ProfileData.second);
+ uint32_t S = VDataPtr->getSize();
+ VDataPtr->swapBytesFromHost(ValueProfDataEndianness);
+ Out.write((const char *)VDataPtr.get(), S);
}
}
};
}
-static std::error_code combineInstrProfRecords(InstrProfRecord &Dest,
- InstrProfRecord &Source,
- uint64_t &MaxFunctionCount) {
- // If the number of counters doesn't match we either have bad data
- // or a hash collision.
- if (Dest.Counts.size() != Source.Counts.size())
- return instrprof_error::count_mismatch;
-
- for (size_t I = 0, E = Source.Counts.size(); I < E; ++I) {
- if (Dest.Counts[I] + Source.Counts[I] < Dest.Counts[I])
- return instrprof_error::counter_overflow;
- Dest.Counts[I] += Source.Counts[I];
- }
-
- for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
+// Internal interface for testing purpose only.
+void InstrProfWriter::setValueProfDataEndianness(
+ support::endianness Endianness) {
+ ValueProfDataEndianness = Endianness;
+}
- std::vector<InstrProfValueSiteRecord> &SourceValueSites =
- Source.getValueSitesForKind(Kind);
- if (SourceValueSites.empty())
- continue;
+std::error_code InstrProfWriter::addRecord(InstrProfRecord &&I,
+ uint64_t Weight) {
+ auto &ProfileDataMap = FunctionData[I.Name];
- std::vector<InstrProfValueSiteRecord> &DestValueSites =
- Dest.getValueSitesForKind(Kind);
+ bool NewFunc;
+ ProfilingData::iterator Where;
+ std::tie(Where, NewFunc) =
+ ProfileDataMap.insert(std::make_pair(I.Hash, InstrProfRecord()));
+ InstrProfRecord &Dest = Where->second;
- if (DestValueSites.empty()) {
- DestValueSites.swap(SourceValueSites);
- continue;
- }
-
- if (DestValueSites.size() != SourceValueSites.size())
- return instrprof_error::value_site_count_mismatch;
- for (size_t I = 0, E = SourceValueSites.size(); I < E; ++I)
- DestValueSites[I].mergeValueData(SourceValueSites[I]);
+ instrprof_error Result = instrprof_error::success;
+ if (NewFunc) {
+ // We've never seen a function with this name and hash, add it.
+ Dest = std::move(I);
+ // Fix up the name to avoid dangling reference.
+ Dest.Name = FunctionData.find(Dest.Name)->getKey();
+ if (Weight > 1)
+ Result = Dest.scale(Weight);
+ } else {
+ // We're updating a function we've seen before.
+ Result = Dest.merge(I, Weight);
}
+ Dest.sortValueData();
+
// We keep track of the max function count as we go for simplicity.
+ // Update this statistic no matter the result of the merge.
if (Dest.Counts[0] > MaxFunctionCount)
MaxFunctionCount = Dest.Counts[0];
- return instrprof_error::success;
-}
-
-void InstrProfWriter::updateStringTableReferences(InstrProfRecord &I) {
- I.Name = StringTable.insertString(I.Name);
- for (auto &VSite : I.IndirectCallSites)
- for (auto &VData : VSite.ValueData)
- VData.first =
- (uint64_t)StringTable.insertString((const char *)VData.first);
-}
-
-std::error_code InstrProfWriter::addRecord(InstrProfRecord &&I) {
- updateStringTableReferences(I);
- auto &ProfileDataMap = FunctionData[I.Name];
-
- auto Where = ProfileDataMap.find(I.Hash);
- if (Where == ProfileDataMap.end()) {
- // We've never seen a function with this name and hash, add it.
- ProfileDataMap[I.Hash] = I;
-
- // We keep track of the max function count as we go for simplicity.
- if (I.Counts[0] > MaxFunctionCount)
- MaxFunctionCount = I.Counts[0];
- return instrprof_error::success;
- }
-
- // We're updating a function we've seen before.
- return combineInstrProfRecords(Where->second, I, MaxFunctionCount);
+ return Result;
}
std::pair<uint64_t, uint64_t> InstrProfWriter::writeImpl(raw_ostream &OS) {
endian::Writer<little>(OS).write<uint64_t>(TableStart.second);
}
+static const char *ValueProfKindStr[] = {
+#define VALUE_PROF_KIND(Enumerator, Value) #Enumerator,
+#include "llvm/ProfileData/InstrProfData.inc"
+};
+
+void InstrProfWriter::writeRecordInText(const InstrProfRecord &Func,
+ InstrProfSymtab &Symtab,
+ raw_fd_ostream &OS) {
+ OS << Func.Name << "\n";
+ OS << "# Func Hash:\n" << Func.Hash << "\n";
+ OS << "# Num Counters:\n" << Func.Counts.size() << "\n";
+ OS << "# Counter Values:\n";
+ for (uint64_t Count : Func.Counts)
+ OS << Count << "\n";
+
+ uint32_t NumValueKinds = Func.getNumValueKinds();
+ if (!NumValueKinds) {
+ OS << "\n";
+ return;
+ }
+
+ OS << "# Num Value Kinds:\n" << Func.getNumValueKinds() << "\n";
+ for (uint32_t VK = 0; VK < IPVK_Last + 1; VK++) {
+ uint32_t NS = Func.getNumValueSites(VK);
+ if (!NS)
+ continue;
+ OS << "# ValueKind = " << ValueProfKindStr[VK] << ":\n" << VK << "\n";
+ OS << "# NumValueSites:\n" << NS << "\n";
+ for (uint32_t S = 0; S < NS; S++) {
+ uint32_t ND = Func.getNumValueDataForSite(VK, S);
+ OS << ND << "\n";
+ std::unique_ptr<InstrProfValueData[]> VD = Func.getValueForSite(VK, S);
+ for (uint32_t I = 0; I < ND; I++) {
+ if (VK == IPVK_IndirectCallTarget)
+ OS << Symtab.getFuncName(VD[I].Value) << ":" << VD[I].Count << "\n";
+ else
+ OS << VD[I].Value << ":" << VD[I].Count << "\n";
+ }
+ }
+ }
+
+ OS << "\n";
+}
+
+void InstrProfWriter::writeText(raw_fd_ostream &OS) {
+ InstrProfSymtab Symtab;
+ for (const auto &I : FunctionData)
+ Symtab.addFuncName(I.getKey());
+ Symtab.finalizeSymtab();
+
+ for (const auto &I : FunctionData)
+ for (const auto &Func : I.getValue())
+ writeRecordInText(Func.second, Symtab, OS);
+}
+
std::unique_ptr<MemoryBuffer> InstrProfWriter::writeBuffer() {
std::string Data;
llvm::raw_string_ostream OS(Data);
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