Revert "[Dwarf] Support `__ptrauth` qualifier in metadata nodes" (#83672)

Reverts llvm/llvm-project#82363

See a build failure related to an issue discovered by memory sanitizer
(use of uninitialized value):
https://lab.llvm.org/buildbot/#/builders/37/builds/31965

1 files changed, 11 insertions, 21 deletions

diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index 36c13e7..28f9665 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -34,10 +34,6 @@ cl::opt<bool> EnableFSDiscriminator(
     cl::desc("Enable adding flow sensitive discriminators"));
 } // namespace llvm
 
-uint32_t DIType::getAlignInBits() const {
-  return (getTag() == dwarf::DW_TAG_LLVM_ptrauth_type ? 0 : SubclassData32);
-}
-
 const DIExpression::FragmentInfo DebugVariable::DefaultFragment = {
     std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::min()};
 
@@ -735,32 +731,26 @@ Constant *DIDerivedType::getDiscriminantValue() const {
   return nullptr;
 }
 
-DIDerivedType *DIDerivedType::getImpl(
-    LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
-    unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
-    uint32_t AlignInBits, uint64_t OffsetInBits,
-    std::optional<unsigned> DWARFAddressSpace,
-    std::optional<PtrAuthData> PtrAuthData, DIFlags Flags, Metadata *ExtraData,
-    Metadata *Annotations, StorageType Storage, bool ShouldCreate) {
+DIDerivedType *
+DIDerivedType::getImpl(LLVMContext &Context, unsigned Tag, MDString *Name,
+                       Metadata *File, unsigned Line, Metadata *Scope,
+                       Metadata *BaseType, uint64_t SizeInBits,
+                       uint32_t AlignInBits, uint64_t OffsetInBits,
+                       std::optional<unsigned> DWARFAddressSpace, DIFlags Flags,
+                       Metadata *ExtraData, Metadata *Annotations,
+                       StorageType Storage, bool ShouldCreate) {
   assert(isCanonical(Name) && "Expected canonical MDString");
   DEFINE_GETIMPL_LOOKUP(DIDerivedType,
                         (Tag, Name, File, Line, Scope, BaseType, SizeInBits,
-                         AlignInBits, OffsetInBits, DWARFAddressSpace,
-                         PtrAuthData, Flags, ExtraData, Annotations));
+                         AlignInBits, OffsetInBits, DWARFAddressSpace, Flags,
+                         ExtraData, Annotations));
   Metadata *Ops[] = {File, Scope, Name, BaseType, ExtraData, Annotations};
   DEFINE_GETIMPL_STORE(DIDerivedType,
                        (Tag, Line, SizeInBits, AlignInBits, OffsetInBits,
-                        DWARFAddressSpace, PtrAuthData, Flags),
+                        DWARFAddressSpace, Flags),
                        Ops);
 }
 
-std::optional<DIDerivedType::PtrAuthData>
-DIDerivedType::getPtrAuthData() const {
-  return getTag() == dwarf::DW_TAG_LLVM_ptrauth_type
-             ? std::optional<PtrAuthData>(PtrAuthData(SubclassData32))
-             : std::nullopt;
-}
-
 DICompositeType *DICompositeType::getImpl(
     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
     unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,