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DI: Use Metadata for DITypeRef and DIScopeRef

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Now that `MDString` and `MDNode` have a common base class, use it.  Note
that it's not useful to assume subclasses of `Metadata` must be one or
the other since we'll be adding more subclasses soon enough.

Part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222064 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2014-11-14 23:55:03 +00:00
parent 0737b4ee14
commit f4d2109d2d
2 changed files with 26 additions and 23 deletions
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11
include/llvm/IR/DebugInfo.h
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@@ -39,6 +39,7 @@ class Value;
class DbgDeclareInst;
class DbgValueInst;
class Instruction;
class Metadata;
class MDNode;
class MDString;
class NamedMDNode;
@@ -333,13 +334,13 @@ template <typename T> class DIRef {
/// \brief Val can be either a MDNode or a MDString.
///
/// In the latter, MDString specifies the type identifier.
const Value *Val;
explicit DIRef(const Value *V);
const Metadata *Val;
explicit DIRef(const Metadata *V);
public:
T resolve(const DITypeIdentifierMap &Map) const;
StringRef getName() const;
operator Value *() const { return const_cast<Value *>(Val); }
operator Metadata *() const { return const_cast<Metadata *>(Val); }
};
template <typename T>
@@ -373,12 +374,12 @@ template <typename T> StringRef DIRef<T>::getName() const {
/// \brief Handle fields that are references to DIScopes.
template <> DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const;
/// \brief Specialize DIRef constructor for DIScopeRef.
template <> DIRef<DIScope>::DIRef(const Value *V);
template <> DIRef<DIScope>::DIRef(const Metadata *V);
/// \brief Handle fields that are references to DITypes.
template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const;
/// \brief Specialize DIRef constructor for DITypeRef.
template <> DIRef<DIType>::DIRef(const Value *V);
template <> DIRef<DIType>::DIRef(const Metadata *V);
/// \briefThis is a wrapper for a type.
///