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IR: Move creation logic down to MDTuple, NFC 

Move creation logic for `MDTuple`s down where it belongs.  Once there
are a few more subclasses, these functions really won't make much sense
here (the `friend` relationship was already awkward).  For now, leave
the `MDNode` versions around, but have it forward down.

llvm-svn: 225685
This commit is contained in:
Duncan P. N. Exon Smith 2015-01-12 20:13:56 +00:00
parent 822f041619
commit ac3128d901
2 changed files with 36 additions and 22 deletions
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46
llvm/include/llvm/IR/Metadata.h
View File

@ -604,25 +604,15 @@ protected:
void dropAllReferences();
static MDNode *getMDNode(LLVMContext &C, ArrayRef<Metadata *> MDs,
bool Insert = true);
MDOperand *mutable_begin() { return mutable_end() - NumOperands; }
MDOperand *mutable_end() { return reinterpret_cast<MDOperand *>(this); }
public:
static MDNode *get(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return getMDNode(Context, MDs, true);
}
static MDNode *getIfExists(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return getMDNode(Context, MDs, false);
}
/// \brief Return a distinct node.
///
/// Return a distinct node -- i.e., a node that is not uniqued.
static MDNode *getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs);
static inline MDNode *get(LLVMContext &Context, ArrayRef<Metadata *> MDs);
static inline MDNode *getIfExists(LLVMContext &Context,
ArrayRef<Metadata *> MDs);
static inline MDNode *getDistinct(LLVMContext &Context,
ArrayRef<Metadata *> MDs);
/// \brief Return a temporary MDNode
///
@ -774,7 +764,6 @@ private:
class MDTuple : public UniquableMDNode {
friend class LLVMContextImpl;
friend class UniquableMDNode;
friend class MDNode;
MDTuple(LLVMContext &C, ArrayRef<Metadata *> Vals, bool AllowRAUW)
: UniquableMDNode(C, MDTupleKind, Vals, AllowRAUW) {}
@ -783,15 +772,40 @@ class MDTuple : public UniquableMDNode {
void setHash(unsigned Hash) { MDNodeSubclassData = Hash; }
void recalculateHash();
static MDTuple *getImpl(LLVMContext &Context, ArrayRef<Metadata *> MDs,
bool ShouldCreate);
public:
/// \brief Get the hash, if any.
unsigned getHash() const { return MDNodeSubclassData; }
static MDTuple *get(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return getImpl(Context, MDs, /* ShouldCreate */ true);
}
static MDTuple *getIfExists(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return getImpl(Context, MDs, /* ShouldCreate */ false);
}
/// \brief Return a distinct node.
///
/// Return a distinct node -- i.e., a node that is not uniqued.
static MDTuple *getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs);
static bool classof(const Metadata *MD) {
return MD->getMetadataID() == MDTupleKind;
}
};
MDNode *MDNode::get(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return MDTuple::get(Context, MDs);
}
MDNode *MDNode::getIfExists(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return MDTuple::getIfExists(Context, MDs);
}
MDNode *MDNode::getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
return MDTuple::getDistinct(Context, MDs);
}
/// \brief Forward declaration of metadata.
///
/// Forward declaration of metadata, in the form of a basic tuple. Unlike \a

12
llvm/lib/IR/Metadata.cpp
View File

@ -581,15 +581,15 @@ void UniquableMDNode::handleChangedOperand(void *Ref, Metadata *New) {
storeDistinctInContext();
}
MDNode *MDNode::getMDNode(LLVMContext &Context, ArrayRef<Metadata *> MDs,
bool Insert) {
auto &Store = Context.pImpl->MDTuples;
MDTuple *MDTuple::getImpl(LLVMContext &Context, ArrayRef<Metadata *> MDs,
bool ShouldCreate) {
MDTupleInfo::KeyTy Key(MDs);
auto &Store = Context.pImpl->MDTuples;
auto I = Store.find_as(Key);
if (I != Store.end())
return *I;
if (!Insert)
if (!ShouldCreate)
return nullptr;
// Coallocate space for the node and Operands together, then placement new.
@ -599,7 +599,7 @@ MDNode *MDNode::getMDNode(LLVMContext &Context, ArrayRef<Metadata *> MDs,
return N;
}
MDNode *MDNode::getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
MDTuple *MDTuple::getDistinct(LLVMContext &Context, ArrayRef<Metadata *> MDs) {
auto *N = new (MDs.size()) MDTuple(Context, MDs, /* AllowRAUW */ false);
N->storeDistinctInContext();
return N;