[lld-macho][nfc] Sanity check on template type

[smeenai]

Ah, sorry, forgot to amend my diff before pushing :/ Thanks for catching and fixing this!

[oontvoo]

Thanks! :)

lld/MachO/InputFiles.cpp

 #include "llvm/LTO/LTO.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/TarWriter.h"
 #include "llvm/TextAPI/Architecture.h"
 #include "llvm/TextAPI/InterfaceFile.h"
 
+#include <type_traits>
+
 using namespace llvm;
 using namespace llvm::MachO;
 using namespace llvm::support::endian;
 using namespace llvm::sys;
 using namespace lld;
 using namespace lld::macho;
 
 // Returns "<internal>", "foo.a(bar.o)", or "baz.o".

 //
 // offset: an offset relative to the start of the original InputSection (before
 // any subsection splitting has occurred). It will be updated to represent the
 // same location as an offset relative to the start of the containing
 // subsection.
 template <class T>
 static InputSection *findContainingSubsection(Subsections &subsections,
                                               T *offset) {
+  static_assert(std::is_same<uint64_t, T>::value ||
+                    std::is_same<uint32_t, T>::value,
+                "unexpected type for offset");
   auto it = std::prev(llvm::upper_bound(
       subsections, *offset,
       [](uint64_t value, Subsection subsec) { return value < subsec.offset; }));
   *offset -= it->offset;
   return it->isec;
 }
 
 template <class SectionHeader>