//
//===----------------------------------------------------------------------===//
+#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
-#include "llvm/IR/Module.h"
#include "llvm/IR/GlobalVariable.h"
-#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/Compression.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/LEB128.h"
#include "llvm/Support/ManagedStatic.h"
using namespace llvm;
Version);
}
+StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName, StringRef FileName) {
+ if (FileName.empty())
+ return PGOFuncName;
+ // Drop the file name including ':'. See also getPGOFuncName.
+ if (PGOFuncName.startswith(FileName))
+ PGOFuncName = PGOFuncName.drop_front(FileName.size() + 1);
+ return PGOFuncName;
+}
+
+// \p FuncName is the string used as profile lookup key for the function. A
+// symbol is created to hold the name. Return the legalized symbol name.
+static std::string getPGOFuncNameVarName(StringRef FuncName,
+ GlobalValue::LinkageTypes Linkage) {
+ std::string VarName = getInstrProfNameVarPrefix();
+ VarName += FuncName;
+
+ if (!GlobalValue::isLocalLinkage(Linkage))
+ return VarName;
+
+ // Now fix up illegal chars in local VarName that may upset the assembler.
+ const char *InvalidChars = "-:<>\"'";
+ size_t found = VarName.find_first_of(InvalidChars);
+ while (found != std::string::npos) {
+ VarName[found] = '_';
+ found = VarName.find_first_of(InvalidChars, found + 1);
+ }
+ return VarName;
+}
+
GlobalVariable *createPGOFuncNameVar(Module &M,
GlobalValue::LinkageTypes Linkage,
StringRef FuncName) {
auto *Value = ConstantDataArray::getString(M.getContext(), FuncName, false);
auto FuncNameVar =
new GlobalVariable(M, Value->getType(), true, Linkage, Value,
- Twine(getInstrProfNameVarPrefix()) + FuncName);
+ getPGOFuncNameVarName(FuncName, Linkage));
// Hide the symbol so that we correctly get a copy for each executable.
if (!GlobalValue::isLocalLinkage(FuncNameVar->getLinkage()))
return createPGOFuncNameVar(*F.getParent(), F.getLinkage(), FuncName);
}
+int collectPGOFuncNameStrings(const std::vector<std::string> &NameStrs,
+ bool doCompression, std::string &Result) {
+ uint8_t Header[16], *P = Header;
+ std::string UncompressedNameStrings =
+ join(NameStrs.begin(), NameStrs.end(), StringRef(" "));
+
+ unsigned EncLen = encodeULEB128(UncompressedNameStrings.length(), P);
+ P += EncLen;
+
+ auto WriteStringToResult = [&](size_t CompressedLen,
+ const std::string &InputStr) {
+ EncLen = encodeULEB128(CompressedLen, P);
+ P += EncLen;
+ char *HeaderStr = reinterpret_cast<char *>(&Header[0]);
+ unsigned HeaderLen = P - &Header[0];
+ Result.append(HeaderStr, HeaderLen);
+ Result += InputStr;
+ return 0;
+ };
+
+ if (!doCompression)
+ return WriteStringToResult(0, UncompressedNameStrings);
+
+ SmallVector<char, 128> CompressedNameStrings;
+ zlib::Status Success =
+ zlib::compress(StringRef(UncompressedNameStrings), CompressedNameStrings,
+ zlib::BestSizeCompression);
+
+ if (Success != zlib::StatusOK)
+ return 1;
+
+ return WriteStringToResult(
+ CompressedNameStrings.size(),
+ std::string(CompressedNameStrings.data(), CompressedNameStrings.size()));
+}
+
+StringRef getPGOFuncNameInitializer(GlobalVariable *NameVar) {
+ auto *Arr = cast<ConstantDataArray>(NameVar->getInitializer());
+ StringRef NameStr =
+ Arr->isCString() ? Arr->getAsCString() : Arr->getAsString();
+ return NameStr;
+}
+
+int collectPGOFuncNameStrings(const std::vector<GlobalVariable *> &NameVars,
+ std::string &Result) {
+ std::vector<std::string> NameStrs;
+ for (auto *NameVar : NameVars) {
+ NameStrs.push_back(getPGOFuncNameInitializer(NameVar));
+ }
+ return collectPGOFuncNameStrings(NameStrs, zlib::isAvailable(), Result);
+}
+
+int readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab) {
+ const uint8_t *P = reinterpret_cast<const uint8_t *>(NameStrings.data());
+ const uint8_t *EndP = reinterpret_cast<const uint8_t *>(NameStrings.data() +
+ NameStrings.size());
+ while (P < EndP) {
+ uint32_t N;
+ uint64_t UncompressedSize = decodeULEB128(P, &N);
+ P += N;
+ uint64_t CompressedSize = decodeULEB128(P, &N);
+ P += N;
+ bool isCompressed = (CompressedSize != 0);
+ SmallString<128> UncompressedNameStrings;
+ StringRef NameStrings;
+ if (isCompressed) {
+ StringRef CompressedNameStrings(reinterpret_cast<const char *>(P),
+ CompressedSize);
+ if (zlib::uncompress(CompressedNameStrings, UncompressedNameStrings,
+ UncompressedSize) != zlib::StatusOK)
+ return 1;
+ P += CompressedSize;
+ NameStrings = StringRef(UncompressedNameStrings.data(),
+ UncompressedNameStrings.size());
+ } else {
+ NameStrings =
+ StringRef(reinterpret_cast<const char *>(P), UncompressedSize);
+ P += UncompressedSize;
+ }
+ // Now parse the name strings.
+ SmallVector<StringRef, 0> Names;
+ NameStrings.split(Names, ' ');
+ for (StringRef &Name : Names)
+ Symtab.addFuncName(Name);
+
+ while (P < EndP && *P == 0)
+ P++;
+ }
+ Symtab.finalizeSymtab();
+ return 0;
+}
+
+instrprof_error InstrProfValueSiteRecord::merge(InstrProfValueSiteRecord &Input,
+ uint64_t Weight) {
+ this->sortByTargetValues();
+ Input.sortByTargetValues();
+ auto I = ValueData.begin();
+ auto IE = ValueData.end();
+ instrprof_error Result = instrprof_error::success;
+ for (auto J = Input.ValueData.begin(), JE = Input.ValueData.end(); J != JE;
+ ++J) {
+ while (I != IE && I->Value < J->Value)
+ ++I;
+ if (I != IE && I->Value == J->Value) {
+ bool Overflowed;
+ I->Count = SaturatingMultiplyAdd(J->Count, Weight, I->Count, &Overflowed);
+ if (Overflowed)
+ Result = instrprof_error::counter_overflow;
+ ++I;
+ continue;
+ }
+ ValueData.insert(I, *J);
+ }
+ return Result;
+}
+
+instrprof_error InstrProfValueSiteRecord::scale(uint64_t Weight) {
+ instrprof_error Result = instrprof_error::success;
+ for (auto I = ValueData.begin(), IE = ValueData.end(); I != IE; ++I) {
+ bool Overflowed;
+ I->Count = SaturatingMultiply(I->Count, Weight, &Overflowed);
+ if (Overflowed)
+ Result = instrprof_error::counter_overflow;
+ }
+ return Result;
+}
+
+// Merge Value Profile data from Src record to this record for ValueKind.
+// Scale merged value counts by \p Weight.
+instrprof_error InstrProfRecord::mergeValueProfData(uint32_t ValueKind,
+ InstrProfRecord &Src,
+ uint64_t Weight) {
+ uint32_t ThisNumValueSites = getNumValueSites(ValueKind);
+ uint32_t OtherNumValueSites = Src.getNumValueSites(ValueKind);
+ if (ThisNumValueSites != OtherNumValueSites)
+ return instrprof_error::value_site_count_mismatch;
+ std::vector<InstrProfValueSiteRecord> &ThisSiteRecords =
+ getValueSitesForKind(ValueKind);
+ std::vector<InstrProfValueSiteRecord> &OtherSiteRecords =
+ Src.getValueSitesForKind(ValueKind);
+ instrprof_error Result = instrprof_error::success;
+ for (uint32_t I = 0; I < ThisNumValueSites; I++)
+ MergeResult(Result, ThisSiteRecords[I].merge(OtherSiteRecords[I], Weight));
+ return Result;
+}
+
+instrprof_error InstrProfRecord::merge(InstrProfRecord &Other,
+ uint64_t Weight) {
+ // If the number of counters doesn't match we either have bad data
+ // or a hash collision.
+ if (Counts.size() != Other.Counts.size())
+ return instrprof_error::count_mismatch;
+
+ instrprof_error Result = instrprof_error::success;
+
+ for (size_t I = 0, E = Other.Counts.size(); I < E; ++I) {
+ bool Overflowed;
+ Counts[I] =
+ SaturatingMultiplyAdd(Other.Counts[I], Weight, Counts[I], &Overflowed);
+ if (Overflowed)
+ Result = instrprof_error::counter_overflow;
+ }
+
+ for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind)
+ MergeResult(Result, mergeValueProfData(Kind, Other, Weight));
+
+ return Result;
+}
+
+instrprof_error InstrProfRecord::scaleValueProfData(uint32_t ValueKind,
+ uint64_t Weight) {
+ uint32_t ThisNumValueSites = getNumValueSites(ValueKind);
+ std::vector<InstrProfValueSiteRecord> &ThisSiteRecords =
+ getValueSitesForKind(ValueKind);
+ instrprof_error Result = instrprof_error::success;
+ for (uint32_t I = 0; I < ThisNumValueSites; I++)
+ MergeResult(Result, ThisSiteRecords[I].scale(Weight));
+ return Result;
+}
+
+instrprof_error InstrProfRecord::scale(uint64_t Weight) {
+ instrprof_error Result = instrprof_error::success;
+ for (auto &Count : this->Counts) {
+ bool Overflowed;
+ Count = SaturatingMultiply(Count, Weight, &Overflowed);
+ if (Overflowed && Result == instrprof_error::success) {
+ Result = instrprof_error::counter_overflow;
+ }
+ }
+ for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind)
+ MergeResult(Result, scaleValueProfData(Kind, Weight));
+
+ return Result;
+}
+
+// Map indirect call target name hash to name string.
+uint64_t InstrProfRecord::remapValue(uint64_t Value, uint32_t ValueKind,
+ ValueMapType *ValueMap) {
+ if (!ValueMap)
+ return Value;
+ switch (ValueKind) {
+ case IPVK_IndirectCallTarget: {
+ auto Result =
+ std::lower_bound(ValueMap->begin(), ValueMap->end(), Value,
+ [](const std::pair<uint64_t, uint64_t> &LHS,
+ uint64_t RHS) { return LHS.first < RHS; });
+ if (Result != ValueMap->end())
+ Value = (uint64_t)Result->second;
+ break;
+ }
+ }
+ return Value;
+}
+
+void InstrProfRecord::addValueData(uint32_t ValueKind, uint32_t Site,
+ InstrProfValueData *VData, uint32_t N,
+ ValueMapType *ValueMap) {
+ for (uint32_t I = 0; I < N; I++) {
+ VData[I].Value = remapValue(VData[I].Value, ValueKind, ValueMap);
+ }
+ std::vector<InstrProfValueSiteRecord> &ValueSites =
+ getValueSitesForKind(ValueKind);
+ if (N == 0)
+ ValueSites.push_back(InstrProfValueSiteRecord());
+ else
+ ValueSites.emplace_back(VData, VData + N);
+}
+
#define INSTR_PROF_COMMON_API_IMPL
#include "llvm/ProfileData/InstrProfData.inc"
-
-/*!
+/*!
* \brief ValueProfRecordClosure Interface implementation for InstrProfRecord
* class. These C wrappers are used as adaptors so that C++ code can be
* invoked as callbacks.
void getValueForSiteInstrProf(const void *R, InstrProfValueData *Dst,
uint32_t K, uint32_t S,
uint64_t (*Mapper)(uint32_t, uint64_t)) {
- return reinterpret_cast<const InstrProfRecord *>(R)
- ->getValueForSite(Dst, K, S, Mapper);
-}
-
-uint64_t stringToHash(uint32_t ValueKind, uint64_t Value) {
- switch (ValueKind) {
- case IPVK_IndirectCallTarget:
- return IndexedInstrProf::ComputeHash(IndexedInstrProf::HashType,
- (const char *)Value);
- break;
- default:
- llvm_unreachable("value kind not handled !");
- }
- return Value;
+ return reinterpret_cast<const InstrProfRecord *>(R)->getValueForSite(
+ Dst, K, S, Mapper);
}
ValueProfData *allocValueProfDataInstrProf(size_t TotalSizeInBytes) {
- return (ValueProfData *)(new (::operator new(TotalSizeInBytes))
- ValueProfData());
+ ValueProfData *VD =
+ (ValueProfData *)(new (::operator new(TotalSizeInBytes)) ValueProfData());
+ memset(VD, 0, TotalSizeInBytes);
+ return VD;
}
static ValueProfRecordClosure InstrProfRecordClosure = {
getNumValueSitesInstrProf,
getNumValueDataInstrProf,
getNumValueDataForSiteInstrProf,
- stringToHash,
+ 0,
getValueForSiteInstrProf,
- allocValueProfDataInstrProf
-};
+ allocValueProfDataInstrProf};
// Wrapper implementation using the closure mechanism.
uint32_t ValueProfData::getSize(const InstrProfRecord &Record) {
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