#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
+#include "llvm/IR/GlobalValue.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MD5.h"
#include <cstdint>
#include <list>
namespace llvm {
+class Function;
+class GlobalVariable;
+class Module;
+
/// Return the name of data section containing profile counter variables.
inline StringRef getInstrProfCountersSectionName(bool AddSegment) {
return AddSegment ? "__DATA,__llvm_prf_cnts" : "__llvm_prf_cnts";
return "__llvm_profile_override_default_filename";
}
+/// Return the modified name for function \c F suitable to be
+/// used the key for profile lookup.
+std::string getPGOFuncName(const Function &F);
+
+/// Return the modified name for a function suitable to be
+/// used the key for profile lookup. The function's original
+/// name is \c RawFuncName and has linkage of type \c Linkage.
+/// The function is defined in module \c FileName.
+std::string getPGOFuncName(StringRef RawFuncName,
+ GlobalValue::LinkageTypes Linkage,
+ StringRef FileName);
+
+/// Create and return the global variable for function name used in PGO
+/// instrumentation. \c FuncName is the name of the function returned
+/// by \c getPGOFuncName call.
+GlobalVariable *createPGOFuncNameVar(Function &F, StringRef FuncName);
+
+/// Create and return the global variable for function name used in PGO
+/// instrumentation. /// \c FuncName is the name of the function
+/// returned by \c getPGOFuncName call, \c M is the owning module,
+/// and \c Linkage is the linkage of the instrumented function.
+GlobalVariable *createPGOFuncNameVar(Module &M,
+ GlobalValue::LinkageTypes Linkage,
+ StringRef FuncName);
+
const std::error_category &instrprof_category();
enum class instrprof_error {
success = 0,
eof,
+ unrecognized_format,
bad_magic,
bad_header,
unsupported_version,
while (I != IE && I->Value < J->Value)
++I;
if (I != IE && I->Value == J->Value) {
- I->Count += J->Count;
+ I->Count = SaturatingAdd(I->Count, J->Count);
++I;
continue;
}
return NumValueKinds;
}
+uint32_t InstrProfRecord::getNumValueData(uint32_t ValueKind) const {
+ uint32_t N = 0;
+ const std::vector<InstrProfValueSiteRecord> &SiteRecords =
+ getValueSitesForKind(ValueKind);
+ for (auto &SR : SiteRecords) {
+ N += SR.ValueData.size();
+ }
+ return N;
+}
+
uint32_t InstrProfRecord::getNumValueSites(uint32_t ValueKind) const {
return getValueSitesForKind(ValueKind).size();
}
VData.Value = (uint64_t)StrTab->insertString((const char *)VData.Value);
}
+inline support::endianness getHostEndianness() {
+ return sys::IsLittleEndianHost ? support::little : support::big;
+}
+
+/// This is the header of the data structure that defines the on-disk
+/// layout of the value profile data of a particular kind for one function.
+struct ValueProfRecord {
+ // The kind of the value profile record.
+ uint32_t Kind;
+ // The number of value profile sites. It is guaranteed to be non-zero;
+ // otherwise the record for this kind won't be emitted.
+ uint32_t NumValueSites;
+ // The first element of the array that stores the number of profiled
+ // values for each value site. The size of the array is NumValueSites.
+ // Since NumValueSites is greater than zero, there is at least one
+ // element in the array.
+ uint8_t SiteCountArray[1];
+
+ // The fake declaration is for documentation purpose only.
+ // Align the start of next field to be on 8 byte boundaries.
+ // uint8_t Padding[X];
+
+ // The array of value profile data. The size of the array is the sum
+ // of all elements in SiteCountArray[].
+ // InstrProfValueData ValueData[];
+
+ /// Return the \c ValueProfRecord header size including the padding bytes.
+ static uint32_t getHeaderSize(uint32_t NumValueSites);
+ /// Return the total size of the value profile record including the
+ /// header and the value data.
+ static uint32_t getSize(uint32_t NumValueSites, uint32_t NumValueData);
+ /// Return the total size of the value profile record including the
+ /// header and the value data.
+ uint32_t getSize() const { return getSize(NumValueSites, getNumValueData()); }
+ /// Use this method to advance to the next \c ValueProfRecord.
+ ValueProfRecord *getNext();
+ /// Return the pointer to the first value profile data.
+ InstrProfValueData *getValueData();
+ /// Return the number of value sites.
+ uint32_t getNumValueSites() const { return NumValueSites; }
+ /// Return the number of value data.
+ uint32_t getNumValueData() const;
+ /// Read data from this record and save it to Record.
+ void deserializeTo(InstrProfRecord &Record,
+ InstrProfRecord::ValueMapType *VMap);
+ /// Extract data from \c Record and serialize into this instance.
+ void serializeFrom(const InstrProfRecord &Record, uint32_t ValueKind,
+ uint32_t NumValueSites);
+ /// In-place byte swap:
+ /// Do byte swap for this instance. \c Old is the original order before
+ /// the swap, and \c New is the New byte order.
+ void swapBytes(support::endianness Old, support::endianness New);
+};
+
+/// Per-function header/control data structure for value profiling
+/// data in indexed format.
+struct ValueProfData {
+ // Total size in bytes including this field. It must be a multiple
+ // of sizeof(uint64_t).
+ uint32_t TotalSize;
+ // The number of value profile kinds that has value profile data.
+ // In this implementation, a value profile kind is considered to
+ // have profile data if the number of value profile sites for the
+ // kind is not zero. More aggressively, the implemnetation can
+ // choose to check the actual data value: if none of the value sites
+ // has any profiled values, the kind can be skipped.
+ uint32_t NumValueKinds;
+
+ // Following are a sequence of variable length records. The prefix/header
+ // of each record is defined by ValueProfRecord type. The number of
+ // records is NumValueKinds.
+ // ValueProfRecord Record_1;
+ // ValueProfRecord Record_N;
+
+ /// Return the total size in bytes of the on-disk value profile data
+ /// given the data stored in Record.
+ static uint32_t getSize(const InstrProfRecord &Record);
+ /// Return a pointer to \c ValueProfData instance ready to be streamed.
+ static std::unique_ptr<ValueProfData>
+ serializeFrom(const InstrProfRecord &Record);
+ /// Return a pointer to \c ValueProfileData instance ready to be read.
+ /// All data in the instance are properly byte swapped. The input
+ /// data is assumed to be in little endian order.
+ static ErrorOr<std::unique_ptr<ValueProfData>>
+ getValueProfData(const unsigned char *D, const unsigned char *const BufferEnd,
+ support::endianness SrcDataEndianness);
+ /// Swap byte order from \c Endianness order to host byte order.
+ void swapBytesToHost(support::endianness Endianness);
+ /// Swap byte order from host byte order to \c Endianness order.
+ void swapBytesFromHost(support::endianness Endianness);
+ /// Return the total size of \c ValueProfileData.
+ uint32_t getSize() const { return TotalSize; }
+ /// Read data from this data and save it to \c Record.
+ void deserializeTo(InstrProfRecord &Record,
+ InstrProfRecord::ValueMapType *VMap);
+ /// Return the first \c ValueProfRecord instance.
+ ValueProfRecord *getFirstValueProfRecord();
+};
+
namespace IndexedInstrProf {
+
enum class HashT : uint32_t {
MD5,
static inline uint64_t ComputeHash(HashT Type, StringRef K) {
switch (Type) {
- case HashT::MD5:
- return IndexedInstrProf::MD5Hash(K);
+ case HashT::MD5:
+ return IndexedInstrProf::MD5Hash(K);
}
llvm_unreachable("Unhandled hash type");
}
-const uint64_t Magic = 0x8169666f72706cff; // "\xfflprofi\x81"
+const uint64_t Magic = 0x8169666f72706cff; // "\xfflprofi\x81"
const uint64_t Version = 3;
const HashT HashType = HashT::MD5;
+// This structure defines the file header of the LLVM profile
+// data file in indexed-format.
struct Header {
uint64_t Magic;
uint64_t Version;
uint64_t HashOffset;
};
-} // end namespace IndexedInstrProf
+} // end namespace IndexedInstrProf
namespace RawInstrProf {
uint64_t('R') << 8 | uint64_t(129);
}
+// Per-function profile data header/control structure.
// The definition should match the structure defined in
// compiler-rt/lib/profile/InstrProfiling.h.
// It should also match the synthesized type in
// Transforms/Instrumentation/InstrProfiling.cpp:getOrCreateRegionCounters.
-
template <class IntPtrT> struct ProfileData {
#define INSTR_PROF_DATA(Type, LLVMType, Name, Init) Type Name;
#include "llvm/ProfileData/InstrProfData.inc"
};
+// File header structure of the LLVM profile data in raw format.
// The definition should match the header referenced in
// compiler-rt/lib/profile/InstrProfilingFile.c and
// InstrProfilingBuffer.c.
-
struct Header {
const uint64_t Magic;
const uint64_t Version;
namespace coverage {
+// Profile coverage map has the following layout:
+// [CoverageMapFileHeader]
+// [ArrayStart]
+// [CovMapFunctionRecord]
+// [CovMapFunctionRecord]
+// ...
+// [ArrayEnd]
+// [Encoded Region Mapping Data]
LLVM_PACKED_START
template <class IntPtrT> struct CovMapFunctionRecord {
#define COVMAP_FUNC_RECORD(Type, LLVMType, Name, Init) Type Name;
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