[compiler-rt] [llvm] [InstrFDO]Allow indexed profile reader to parse compatible future versions and returns errors for incompatible ones. (PR #88212)

[Kazu Hirata via llvm-commits]

================
@@ -195,15 +195,32 @@ InstrProfWriter::InstrProfWriter(
 
 InstrProfWriter::~InstrProfWriter() { delete InfoObj; }
 
-// Internal interface for testing purpose only.
+// Begin: Internal interface for testing purpose only.
 void InstrProfWriter::setValueProfDataEndianness(llvm::endianness Endianness) {
   InfoObj->ValueProfDataEndianness = Endianness;
 }
 
-void InstrProfWriter::setOutputSparse(bool Sparse) {
-  this->Sparse = Sparse;
+void InstrProfWriter::setOutputSparse(bool Sparse) { this->Sparse = Sparse; }
+
+void InstrProfWriter::setProfileVersion(uint32_t Version) {
+  ProfileVersion = std::make_optional(Version);
+}
+
+void InstrProfWriter::setMinCompatibleReaderProfileVersion(uint32_t Version) {
+  MinCompatibleReaderProfileVersion = std::make_optional(Version);
----------------
kazutakahirata wrote:

You can just "assign":

```suggestion
  MinCompatibleReaderProfileVersion = Version;
```

https://github.com/llvm/llvm-project/pull/88212