[Object] Change ObjectFile::getSectionContents to return Expected<ArrayRef<uint8_t>>

Change
std::error_code getSectionContents(DataRefImpl, StringRef &) const;
to
Expected<ArrayRef<uint8_t>> getSectionContents(DataRefImpl) const;

Many object formats use ArrayRef<uint8_t> as the underlying type, which
is generally better than StringRef to represent binary data, so change
the type to decrease the number of type conversions.

Reviewed By: ruiu, sbc100

Differential Revision: https://reviews.llvm.org/D61781

llvm-svn: 360648

1 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/Object/XCOFFObjectFile.cpp b/llvm/lib/Object/XCOFFObjectFile.cpp
index 2a456538966..db57fbad002 100644
--- a/llvm/lib/Object/XCOFFObjectFile.cpp
+++ b/llvm/lib/Object/XCOFFObjectFile.cpp
@@ -137,10 +137,9 @@ uint64_t XCOFFObjectFile::getSectionSize(DataRefImpl Sec) const {
   return toSection(Sec)->SectionSize;
 }
 
-std::error_code XCOFFObjectFile::getSectionContents(DataRefImpl Sec,
-                                                    StringRef &Res) const {
+Expected<ArrayRef<uint8_t>>
+XCOFFObjectFile::getSectionContents(DataRefImpl Sec) const {
   llvm_unreachable("Not yet implemented!");
-  return std::error_code();
 }
 
 uint64_t XCOFFObjectFile::getSectionAlignment(DataRefImpl Sec) const {