[PGO] clean up and documentation
Introduce enum for indexed format versions and
document indexed format change history.
llvm-svn: 257737
diff --git a/llvm/lib/ProfileData/InstrProfReader.cpp b/llvm/lib/ProfileData/InstrProfReader.cpp
index 5e83456..7e9b7ab 100644
--- a/llvm/lib/ProfileData/InstrProfReader.cpp
+++ b/llvm/lib/ProfileData/InstrProfReader.cpp
@@ -478,7 +478,7 @@
// Initialize number of counters for FormatVersion == 1.
uint64_t CountsSize = N / sizeof(uint64_t) - 1;
// If format version is different then read the number of counters.
- if (FormatVersion != 1) {
+ if (FormatVersion != IndexedInstrProf::ProfVersion::Version1) {
if (D + sizeof(uint64_t) > End)
return data_type();
CountsSize = endian::readNext<uint64_t, little, unaligned>(D);
@@ -495,7 +495,8 @@
DataBuffer.emplace_back(K, Hash, std::move(CounterBuffer));
// Read value profiling data.
- if (FormatVersion > 2 && !readValueProfilingData(D, End)) {
+ if (FormatVersion > IndexedInstrProf::ProfVersion::Version2 &&
+ !readValueProfilingData(D, End)) {
DataBuffer.clear();
return data_type();
}
@@ -572,7 +573,7 @@
// Read the version.
uint64_t FormatVersion = endian::byte_swap<uint64_t, little>(Header->Version);
- if (FormatVersion > IndexedInstrProf::Version)
+ if (FormatVersion > IndexedInstrProf::ProfVersion::CurrentVersion)
return error(instrprof_error::unsupported_version);
// Read the maximal function count.