[instrprof][NFC] Refactor out the common logic for getProfileKind.

The logic for getProfileKind for RawInstrProfReader and
InstrProfReaderIndex is similar. To avoid duplication, move the logic
from the header to InstrProfReader.cpp and introduce a static method
which implements the common code.

Differential Revision: https://reviews.llvm.org/D118656

Author: Snehasish Kumar

llvm/include/llvm/ProfileData/InstrProfReader.h

@@ -310,25 +310,7 @@ class RawInstrProfReader : public InstrProfReader {
   }
 
   /// Returns a BitsetEnum describing the attributes of the raw instr profile.
-  InstrProfKind getProfileKind() const override {
-    InstrProfKind ProfileKind = InstrProfKind::Unknown;
-    if (Version & VARIANT_MASK_IR_PROF) {
-      ProfileKind |= InstrProfKind::IR;
-    }
-    if (Version & VARIANT_MASK_CSIR_PROF) {
-      ProfileKind |= InstrProfKind::CS;
-    }
-    if (Version & VARIANT_MASK_INSTR_ENTRY) {
-      ProfileKind |= InstrProfKind::BB;
-    }
-    if (Version & VARIANT_MASK_BYTE_COVERAGE) {
-      ProfileKind |= InstrProfKind::SingleByteCoverage;
-    }
-    if (Version & VARIANT_MASK_FUNCTION_ENTRY_ONLY) {
-      ProfileKind |= InstrProfKind::FunctionEntryOnly;
-    }
-    return ProfileKind;
-  }
+  InstrProfKind getProfileKind() const override;
 
   InstrProfSymtab &getSymtab() override {
     assert(Symtab.get());
@@ -532,25 +514,7 @@ class InstrProfReaderIndex : public InstrProfReaderIndexBase {
     return (FormatVersion & VARIANT_MASK_FUNCTION_ENTRY_ONLY) != 0;
   }
 
-  InstrProfKind getProfileKind() const override {
-    InstrProfKind ProfileKind = InstrProfKind::Unknown;
-    if (FormatVersion & VARIANT_MASK_IR_PROF) {
-      ProfileKind |= InstrProfKind::IR;
-    }
-    if (FormatVersion & VARIANT_MASK_CSIR_PROF) {
-      ProfileKind |= InstrProfKind::CS;
-    }
-    if (FormatVersion & VARIANT_MASK_INSTR_ENTRY) {
-      ProfileKind |= InstrProfKind::BB;
-    }
-    if (FormatVersion & VARIANT_MASK_BYTE_COVERAGE) {
-      ProfileKind |= InstrProfKind::SingleByteCoverage;
-    }
-    if (FormatVersion & VARIANT_MASK_FUNCTION_ENTRY_ONLY) {
-      ProfileKind |= InstrProfKind::FunctionEntryOnly;
-    }
-    return ProfileKind;
-  }
+  InstrProfKind getProfileKind() const override;
 
   Error populateSymtab(InstrProfSymtab &Symtab) override {
     return Symtab.create(HashTable->keys());

llvm/lib/ProfileData/InstrProfReader.cpp

@@ -38,6 +38,28 @@
 
 using namespace llvm;
 
+// Extracts the variant information from the top 8 bits in the version and
+// returns an enum specifying the variants present.
+static InstrProfKind getProfileKindFromVersion(uint64_t Version) {
+  InstrProfKind ProfileKind = InstrProfKind::Unknown;
+  if (Version & VARIANT_MASK_IR_PROF) {
+    ProfileKind |= InstrProfKind::IR;
+  }
+  if (Version & VARIANT_MASK_CSIR_PROF) {
+    ProfileKind |= InstrProfKind::CS;
+  }
+  if (Version & VARIANT_MASK_INSTR_ENTRY) {
+    ProfileKind |= InstrProfKind::BB;
+  }
+  if (Version & VARIANT_MASK_BYTE_COVERAGE) {
+    ProfileKind |= InstrProfKind::SingleByteCoverage;
+  }
+  if (Version & VARIANT_MASK_FUNCTION_ENTRY_ONLY) {
+    ProfileKind |= InstrProfKind::FunctionEntryOnly;
+  }
+  return ProfileKind;
+}
+
 static Expected<std::unique_ptr<MemoryBuffer>>
 setupMemoryBuffer(const Twine &Path) {
   ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
@@ -297,6 +319,11 @@ Error TextInstrProfReader::readNextRecord(NamedInstrProfRecord &Record) {
   return success();
 }
 
+template <class IntPtrT>
+InstrProfKind RawInstrProfReader<IntPtrT>::getProfileKind() const {
+  return getProfileKindFromVersion(Version);
+}
+
 template <class IntPtrT>
 bool RawInstrProfReader<IntPtrT>::hasFormat(const MemoryBuffer &DataBuffer) {
   if (DataBuffer.getBufferSize() < sizeof(uint64_t))
@@ -718,6 +745,11 @@ InstrProfReaderIndex<HashTableImpl>::InstrProfReaderIndex(
   RecordIterator = HashTable->data_begin();
 }
 
+template <typename HashTableImpl>
+InstrProfKind InstrProfReaderIndex<HashTableImpl>::getProfileKind() const {
+  return getProfileKindFromVersion(FormatVersion);
+}
+
 namespace {
 /// A remapper that does not apply any remappings.
 class InstrProfReaderNullRemapper : public InstrProfReaderRemapper {