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Differential D49915 Diff 166236 llvm/trunk/include/llvm/IR/Metadata.h

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llvm/trunk/include/llvm/IR/Metadata.h

Show First 20 Lines • Show All 60 Lines • ▼ Show 20 Lines	class Metadata {
/// RTTI.		/// RTTI.
const unsigned char SubclassID;		const unsigned char SubclassID;

protected:		protected:
/// Active type of storage.		/// Active type of storage.
enum StorageType { Uniqued, Distinct, Temporary };		enum StorageType { Uniqued, Distinct, Temporary };

/// Storage flag for non-uniqued, otherwise unowned, metadata.		/// Storage flag for non-uniqued, otherwise unowned, metadata.
unsigned char Storage;		unsigned char Storage : 7;
// TODO: expose remaining bits to subclasses.		// TODO: expose remaining bits to subclasses.

		unsigned char ImplicitCode : 1;

unsigned short SubclassData16 = 0;		unsigned short SubclassData16 = 0;
unsigned SubclassData32 = 0;		unsigned SubclassData32 = 0;

public:		public:
enum MetadataKind {		enum MetadataKind {
#define HANDLE_METADATA_LEAF(CLASS) CLASS##Kind,		#define HANDLE_METADATA_LEAF(CLASS) CLASS##Kind,
#include "llvm/IR/Metadata.def"		#include "llvm/IR/Metadata.def"
};		};

protected:		protected:
Metadata(unsigned ID, StorageType Storage)		Metadata(unsigned ID, StorageType Storage)
: SubclassID(ID), Storage(Storage) {		: SubclassID(ID), Storage(Storage), ImplicitCode(false) {
static_assert(sizeof(*this) == 8, "Metadata fields poorly packed");		static_assert(sizeof(*this) == 8, "Metadata fields poorly packed");
}		}

~Metadata() = default;		~Metadata() = default;

/// Default handling of a changed operand, which asserts.		/// Default handling of a changed operand, which asserts.
///		///
/// If subclasses pass themselves in as owners to a tracking node reference,		/// If subclasses pass themselves in as owners to a tracking node reference,
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