-static Metadata *cloneMDTuple(const MDTuple *Node, ValueToValueMapTy &VM,
- RemapFlags Flags,
- ValueMapTypeRemapper *TypeMapper,
- ValueMaterializer *Materializer,
- bool IsDistinct) {
- // Distinct MDTuples have their own code path.
- assert(!IsDistinct && "Unexpected distinct tuple");
- (void)IsDistinct;
-
- SmallVector<Metadata *, 4> Elts;
- Elts.reserve(Node->getNumOperands());
- for (unsigned I = 0, E = Node->getNumOperands(); I != E; ++I)
- Elts.push_back(mapMetadataOp(Node->getOperand(I), VM, Flags, TypeMapper,
- Materializer));
-
- return MDTuple::get(Node->getContext(), Elts);
-}
-
-static Metadata *cloneMDLocation(const MDLocation *Node, ValueToValueMapTy &VM,
- RemapFlags Flags,
- ValueMapTypeRemapper *TypeMapper,
- ValueMaterializer *Materializer,
- bool IsDistinct) {
- return (IsDistinct ? MDLocation::getDistinct : MDLocation::get)(
- Node->getContext(), Node->getLine(), Node->getColumn(),
- mapMetadataOp(Node->getScope(), VM, Flags, TypeMapper, Materializer),
- mapMetadataOp(Node->getInlinedAt(), VM, Flags, TypeMapper, Materializer));
-}
-
-static Metadata *cloneMDNode(const UniquableMDNode *Node, ValueToValueMapTy &VM,
- RemapFlags Flags, ValueMapTypeRemapper *TypeMapper,
- ValueMaterializer *Materializer, bool IsDistinct) {
- switch (Node->getMetadataID()) {
- default:
- llvm_unreachable("Invalid UniquableMDNode subclass");
-#define HANDLE_UNIQUABLE_LEAF(CLASS) \
- case Metadata::CLASS##Kind: \
- return clone##CLASS(cast<CLASS>(Node), VM, Flags, TypeMapper, \
- Materializer, IsDistinct); \
- break;
-#include "llvm/IR/Metadata.def"
+/// \brief Remap nodes.
+///
+/// Insert \c NewNode in the value map, and then remap \c OldNode's operands.
+/// Assumes that \c NewNode is already a clone of \c OldNode.
+///
+/// \pre \c NewNode is a clone of \c OldNode.
+static bool remap(const MDNode *OldNode, MDNode *NewNode,
+ SmallVectorImpl<MDNode *> &Cycles, ValueToValueMapTy &VM,
+ RemapFlags Flags, ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer) {
+ assert(OldNode->getNumOperands() == NewNode->getNumOperands() &&
+ "Expected nodes to match");
+ assert(OldNode->isResolved() && "Expected resolved node");
+ assert(!NewNode->isUniqued() && "Expected non-uniqued node");
+
+ // Map the node upfront so it's available for cyclic references.
+ mapToMetadata(VM, OldNode, NewNode);
+ bool AnyChanged = false;
+ for (unsigned I = 0, E = OldNode->getNumOperands(); I != E; ++I) {
+ Metadata *Old = OldNode->getOperand(I);
+ assert(NewNode->getOperand(I) == Old &&
+ "Expected old operands to already be in place");
+
+ Metadata *New = mapMetadataOp(OldNode->getOperand(I), Cycles, VM, Flags,
+ TypeMapper, Materializer);
+ if (Old != New) {
+ AnyChanged = true;
+ NewNode->replaceOperandWith(I, New);
+ }