1 //=-- InstrProfIndexed.h - Indexed profiling format support -------*- C++ -*-=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Shared header for the instrumented profile data reader and writer.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_PROFILEDATA_INSTRPROF_INDEXED_H_
15 #define LLVM_PROFILEDATA_INSTRPROF_INDEXED_H_
17 #include "llvm/Support/MD5.h"
21 namespace IndexedInstrProf {
22 enum class HashT : uint32_t {
28 static inline uint64_t MD5Hash(StringRef Str) {
31 llvm::MD5::MD5Result Result;
33 // Return the least significant 8 bytes. Our MD5 implementation returns the
34 // result in little endian, so we may need to swap bytes.
35 using namespace llvm::support;
36 return endian::read<uint64_t, little, unaligned>(Result);
39 static inline uint64_t ComputeHash(HashT Type, StringRef K) {
42 return IndexedInstrProf::MD5Hash(K);
44 llvm_unreachable("Unhandled hash type");
47 const uint64_t Magic = 0x8169666f72706cff; // "\xfflprofi\x81"
48 const uint64_t Version = 1;
49 const HashT HashType = HashT::MD5;
52 } // end namespace llvm
54 #endif // LLVM_PROFILEDATA_INSTRPROF_INDEXED_H_