Using crtp to refactor the xcoff section header

SUMMARY:
According to https://reviews.llvm.org/D68575#inline-617586, Create a NFC patch for it.

Using crtp to refactor the xcoff section header
Move the define of SectionFlagsReservedMask and SectionFlagsTypeMask from XCOFFDumper.cpp to XCOFFObjectFile.h

Reviewers: hubert.reinterpretcast,jasonliu
Subscribers: rupprecht, seiyai,hiraditya

Differential Revision: https://reviews.llvm.org/D69131

1 files changed, 19 insertions, 8 deletions

diff --git a/llvm/lib/Object/XCOFFObjectFile.cpp b/llvm/lib/Object/XCOFFObjectFile.cpp
index 98782c2..6f1d999 100644
--- a/llvm/lib/Object/XCOFFObjectFile.cpp
+++ b/llvm/lib/Object/XCOFFObjectFile.cpp
@@ -46,6 +46,25 @@ static StringRef generateXCOFFFixedNameStringRef(const char *Name) {
                     : StringRef(Name, XCOFF::NameSize);
 }
 
+// Explictly instantiate template classes.
+template struct XCOFFSectionHeader<XCOFFSectionHeader32>;
+template struct XCOFFSectionHeader<XCOFFSectionHeader64>;
+
+template <typename T> StringRef XCOFFSectionHeader<T>::getName() const {
+  const T &DerivedXCOFFSectionHeader = static_cast<const T &>(*this);
+  return generateXCOFFFixedNameStringRef(DerivedXCOFFSectionHeader.Name);
+}
+
+template <typename T> uint16_t XCOFFSectionHeader<T>::getSectionType() const {
+  const T &DerivedXCOFFSectionHeader = static_cast<const T &>(*this);
+  return DerivedXCOFFSectionHeader.Flags & SectionFlagsTypeMask;
+}
+
+template <typename T>
+bool XCOFFSectionHeader<T>::isReservedSectionType() const {
+  return getSectionType() & SectionFlagsReservedMask;
+}
+
 bool XCOFFRelocation32::isRelocationSigned() const {
   return Info & XR_SIGN_INDICATOR_MASK;
 }
@@ -688,14 +707,6 @@ ObjectFile::createXCOFFObjectFile(MemoryBufferRef MemBufRef,
   return XCOFFObjectFile::create(FileType, MemBufRef);
 }
 
-StringRef XCOFFSectionHeader32::getName() const {
-  return generateXCOFFFixedNameStringRef(Name);
-}
-
-StringRef XCOFFSectionHeader64::getName() const {
-  return generateXCOFFFixedNameStringRef(Name);
-}
-
 XCOFF::StorageClass XCOFFSymbolRef::getStorageClass() const {
   return OwningObjectPtr->toSymbolEntry(SymEntDataRef)->StorageClass;
 }