[LLVM] Use {} instead of std::nullopt to initialize empty ArrayRef (#109133)

It is almost always simpler to use {} instead of std::nullopt to
initialize an empty ArrayRef. This patch changes all occurrences I could
find in LLVM itself. In future the ArrayRef(std::nullopt_t) constructor
could be deprecated or removed.

1 files changed, 13 insertions, 13 deletions

diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index 8fa3f67..46ed3b2 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -4906,12 +4906,12 @@ MachOObjectFile::getLinkOptHintsLoadCommand() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const {
   if (!DyldInfoLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldInfoOrErr =
     getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
   if (!DyldInfoOrErr)
-    return std::nullopt;
+    return {};
   MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.rebase_off));
@@ -4920,12 +4920,12 @@ ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
   if (!DyldInfoLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldInfoOrErr =
     getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
   if (!DyldInfoOrErr)
-    return std::nullopt;
+    return {};
   MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.bind_off));
@@ -4934,12 +4934,12 @@ ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
   if (!DyldInfoLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldInfoOrErr =
     getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
   if (!DyldInfoOrErr)
-    return std::nullopt;
+    return {};
   MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.weak_bind_off));
@@ -4948,12 +4948,12 @@ ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
   if (!DyldInfoLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldInfoOrErr =
       getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
   if (!DyldInfoOrErr)
-    return std::nullopt;
+    return {};
   MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.lazy_bind_off));
@@ -4962,12 +4962,12 @@ ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const {
   if (!DyldInfoLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldInfoOrErr =
       getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
   if (!DyldInfoOrErr)
-    return std::nullopt;
+    return {};
   MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.export_off));
@@ -5248,12 +5248,12 @@ MachOObjectFile::getDyldChainedFixupTargets() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getDyldExportsTrie() const {
   if (!DyldExportsTrieLoadCmd)
-    return std::nullopt;
+    return {};
 
   auto DyldExportsTrieOrError = getStructOrErr<MachO::linkedit_data_command>(
       *this, DyldExportsTrieLoadCmd);
   if (!DyldExportsTrieOrError)
-    return std::nullopt;
+    return {};
   MachO::linkedit_data_command DyldExportsTrie = DyldExportsTrieOrError.get();
   const uint8_t *Ptr =
       reinterpret_cast<const uint8_t *>(getPtr(*this, DyldExportsTrie.dataoff));
@@ -5277,7 +5277,7 @@ SmallVector<uint64_t> MachOObjectFile::getFunctionStarts() const {
 
 ArrayRef<uint8_t> MachOObjectFile::getUuid() const {
   if (!UuidLoadCmd)
-    return std::nullopt;
+    return {};
   // Returning a pointer is fine as uuid doesn't need endian swapping.
   const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid);
   return ArrayRef(reinterpret_cast<const uint8_t *>(Ptr), 16);