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//=-- InstrProfIndexed.h - Indexed profiling format support -------*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Shared header for the instrumented profile data reader and writer.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_PROFILEDATA_INSTRPROFINDEXED_H
#define LLVM_LIB_PROFILEDATA_INSTRPROFINDEXED_H
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MD5.h"
namespace llvm {
namespace IndexedInstrProf {
enum class HashT : uint32_t {
MD5,
Last = MD5
};
static inline uint64_t MD5Hash(StringRef Str) {
MD5 Hash;
Hash.update(Str);
llvm::MD5::MD5Result Result;
Hash.final(Result);
// Return the least significant 8 bytes. Our MD5 implementation returns the
// result in little endian, so we may need to swap bytes.
using namespace llvm::support;
return endian::read<uint64_t, little, unaligned>(Result);
}
static inline uint64_t ComputeHash(HashT Type, StringRef K) {
switch (Type) {
case HashT::MD5:
return IndexedInstrProf::MD5Hash(K);
}
llvm_unreachable("Unhandled hash type");
}
const uint64_t Magic = 0x8169666f72706cff; // "\xfflprofi\x81"
const uint64_t Version = 2;
const HashT HashType = HashT::MD5;
}
} // end namespace llvm
#endif
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