// Out of line method to get vtable etc for class.
void ValueMapTypeRemapper::anchor() {}
+void ValueMaterializer::anchor() {}
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM, RemapFlags Flags,
- ValueMapTypeRemapper *TypeMapper) {
+ ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer) {
ValueToValueMapTy::iterator I = VM.find(V);
// If the value already exists in the map, use it.
if (I != VM.end() && I->second) return I->second;
+ // If we have a materializer and it can materialize a value, use that.
+ if (Materializer) {
+ if (Value *NewV = Materializer->materializeValueFor(const_cast<Value*>(V)))
+ return VM[V] = NewV;
+ }
+
// Global values do not need to be seeded into the VM if they
// are using the identity mapping.
- if (isa<GlobalValue>(V) || isa<MDString>(V))
+ if (isa<GlobalValue>(V))
return VM[V] = const_cast<Value*>(V);
if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
return VM[V] = const_cast<Value*>(V);
}
-
- if (const MDNode *MD = dyn_cast<MDNode>(V)) {
+ if (const auto *MDV = dyn_cast<MetadataAsValue>(V)) {
+ const Metadata *MD = MDV->getMetadata();
// If this is a module-level metadata and we know that nothing at the module
// level is changing, then use an identity mapping.
- if (!MD->isFunctionLocal() && (Flags & RF_NoModuleLevelChanges))
- return VM[V] = const_cast<Value*>(V);
-
- // Create a dummy node in case we have a metadata cycle.
- MDNode *Dummy = MDNode::getTemporary(V->getContext(), ArrayRef<Value*>());
- VM[V] = Dummy;
-
- // Check all operands to see if any need to be remapped.
- for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
- Value *OP = MD->getOperand(i);
- if (OP == 0) continue;
- Value *Mapped_OP = MapValue(OP, VM, Flags, TypeMapper);
- // If Mapped_Op is null, we should use indentity map.
- if (Mapped_OP == OP || Mapped_OP == 0) continue;
-
- // Ok, at least one operand needs remapping.
- SmallVector<Value*, 4> Elts;
- Elts.reserve(MD->getNumOperands());
- for (i = 0; i != e; ++i) {
- Value *Op = MD->getOperand(i);
- if (Op == 0)
- Elts.push_back(0);
- else {
- Value *Mapped_Op = MapValue(Op, VM, Flags, TypeMapper);
- // If Mapped_Op is null, we should use indentity map.
- Elts.push_back(Mapped_Op ? Mapped_Op : Op);
- }
- }
- MDNode *NewMD = MDNode::get(V->getContext(), Elts);
- Dummy->replaceAllUsesWith(NewMD);
- VM[V] = NewMD;
- MDNode::deleteTemporary(Dummy);
- return NewMD;
- }
+ if (!isa<LocalAsMetadata>(MD) && (Flags & RF_NoModuleLevelChanges))
+ return VM[V] = const_cast<Value *>(V);
- VM[V] = const_cast<Value*>(V);
- MDNode::deleteTemporary(Dummy);
+ auto *MappedMD = MapValue(MD, VM, Flags, TypeMapper, Materializer);
+ if (MD == MappedMD || (!MappedMD && (Flags & RF_IgnoreMissingEntries)))
+ return VM[V] = const_cast<Value *>(V);
- // No operands needed remapping. Use an identity mapping.
- return const_cast<Value*>(V);
+ // FIXME: This assert crashes during bootstrap, but I think it should be
+ // correct. For now, just match behaviour from before the metadata/value
+ // split.
+ //
+ // assert(MappedMD && "Referenced metadata value not in value map");
+ return VM[V] = MetadataAsValue::get(V->getContext(), MappedMD);
}
// Okay, this either must be a constant (which may or may not be mappable) or
// is something that is not in the mapping table.
Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
- if (C == 0)
- return 0;
+ if (!C)
+ return nullptr;
if (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Function *F =
- cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper));
+ cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper, Materializer));
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
- Flags, TypeMapper));
+ Flags, TypeMapper, Materializer));
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
}
// Otherwise, we have some other constant to remap. Start by checking to see
// if all operands have an identity remapping.
unsigned OpNo = 0, NumOperands = C->getNumOperands();
- Value *Mapped = 0;
+ Value *Mapped = nullptr;
for (; OpNo != NumOperands; ++OpNo) {
Value *Op = C->getOperand(OpNo);
- Mapped = MapValue(Op, VM, Flags, TypeMapper);
+ Mapped = MapValue(Op, VM, Flags, TypeMapper, Materializer);
if (Mapped != C) break;
}
// Map the rest of the operands that aren't processed yet.
for (++OpNo; OpNo != NumOperands; ++OpNo)
Ops.push_back(MapValue(cast<Constant>(C->getOperand(OpNo)), VM,
- Flags, TypeMapper));
+ Flags, TypeMapper, Materializer));
}
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
return VM[V] = ConstantPointerNull::get(cast<PointerType>(NewTy));
}
+static Metadata *map(ValueToValueMapTy &VM, const Metadata *Key,
+ Metadata *Val) {
+ VM.MD()[Key].reset(Val);
+ return Val;
+}
+
+static Metadata *mapToSelf(ValueToValueMapTy &VM, const Metadata *MD) {
+ return map(VM, MD, const_cast<Metadata *>(MD));
+}
+
+static Metadata *MapValueImpl(const Metadata *MD, ValueToValueMapTy &VM,
+ RemapFlags Flags,
+ ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer) {
+ // If the value already exists in the map, use it.
+ if (Metadata *NewMD = VM.MD().lookup(MD).get())
+ return NewMD;
+
+ if (isa<MDString>(MD))
+ return mapToSelf(VM, MD);
+
+ if (isa<ConstantAsMetadata>(MD))
+ if ((Flags & RF_NoModuleLevelChanges))
+ return mapToSelf(VM, MD);
+
+ if (const auto *VMD = dyn_cast<ValueAsMetadata>(MD)) {
+ Value *MappedV =
+ MapValue(VMD->getValue(), VM, Flags, TypeMapper, Materializer);
+ if (VMD->getValue() == MappedV ||
+ (!MappedV && (Flags & RF_IgnoreMissingEntries)))
+ return mapToSelf(VM, MD);
+
+ // FIXME: This assert crashes during bootstrap, but I think it should be
+ // correct. For now, just match behaviour from before the metadata/value
+ // split.
+ //
+ // assert(MappedV && "Referenced metadata not in value map!");
+ if (MappedV)
+ return map(VM, MD, ValueAsMetadata::get(MappedV));
+ return nullptr;
+ }
+
+ const MDNode *Node = cast<MDNode>(MD);
+ assert(Node->isResolved() && "Unexpected unresolved node");
+
+ auto getMappedOp = [&](Metadata *Op) -> Metadata *{
+ if (!Op)
+ return nullptr;
+ if (Metadata *MappedOp =
+ MapValueImpl(Op, VM, Flags, TypeMapper, Materializer))
+ return MappedOp;
+ // Use identity map if MappedOp is null and we can ignore missing entries.
+ if (Flags & RF_IgnoreMissingEntries)
+ return Op;
+
+ // FIXME: This assert crashes during bootstrap, but I think it should be
+ // correct. For now, just match behaviour from before the metadata/value
+ // split.
+ //
+ // llvm_unreachable("Referenced metadata not in value map!");
+ return nullptr;
+ };
+
+ // If this is a module-level metadata and we know that nothing at the
+ // module level is changing, then use an identity mapping.
+ if (Flags & RF_NoModuleLevelChanges)
+ return mapToSelf(VM, MD);
+
+ // Create a dummy node in case we have a metadata cycle.
+ MDNodeFwdDecl *Dummy = MDNode::getTemporary(Node->getContext(), None);
+ map(VM, Node, Dummy);
+
+ // Check all operands to see if any need to be remapped.
+ for (unsigned I = 0, E = Node->getNumOperands(); I != E; ++I) {
+ Metadata *Op = Node->getOperand(I);
+ Metadata *MappedOp = getMappedOp(Op);
+ if (Op == MappedOp)
+ continue;
+
+ // Ok, at least one operand needs remapping.
+ SmallVector<Metadata *, 4> Elts;
+ Elts.reserve(Node->getNumOperands());
+ for (I = 0; I != E; ++I)
+ Elts.push_back(getMappedOp(Node->getOperand(I)));
+
+ MDNode *NewMD = MDNode::get(Node->getContext(), Elts);
+ Dummy->replaceAllUsesWith(NewMD);
+ MDNode::deleteTemporary(Dummy);
+ return map(VM, Node, NewMD);
+ }
+
+ // No operands needed remapping. Use an identity mapping.
+ mapToSelf(VM, MD);
+ MDNode::deleteTemporary(Dummy);
+ return const_cast<Metadata *>(MD);
+}
+
+Metadata *llvm::MapValue(const Metadata *MD, ValueToValueMapTy &VM,
+ RemapFlags Flags, ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer) {
+ Metadata *NewMD = MapValueImpl(MD, VM, Flags, TypeMapper, Materializer);
+ if (NewMD && NewMD != MD)
+ if (auto *G = dyn_cast<GenericMDNode>(NewMD))
+ G->resolveCycles();
+ return NewMD;
+}
+
+MDNode *llvm::MapValue(const MDNode *MD, ValueToValueMapTy &VM,
+ RemapFlags Flags, ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer) {
+ return cast<MDNode>(MapValue(static_cast<const Metadata *>(MD), VM, Flags,
+ TypeMapper, Materializer));
+}
+
/// RemapInstruction - Convert the instruction operands from referencing the
/// current values into those specified by VMap.
///
void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
- RemapFlags Flags, ValueMapTypeRemapper *TypeMapper){
+ RemapFlags Flags, ValueMapTypeRemapper *TypeMapper,
+ ValueMaterializer *Materializer){
// Remap operands.
for (User::op_iterator op = I->op_begin(), E = I->op_end(); op != E; ++op) {
- Value *V = MapValue(*op, VMap, Flags, TypeMapper);
+ Value *V = MapValue(*op, VMap, Flags, TypeMapper, Materializer);
// If we aren't ignoring missing entries, assert that something happened.
- if (V != 0)
+ if (V)
*op = V;
else
assert((Flags & RF_IgnoreMissingEntries) &&
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) {
Value *V = MapValue(PN->getIncomingBlock(i), VMap, Flags);
// If we aren't ignoring missing entries, assert that something happened.
- if (V != 0)
+ if (V)
PN->setIncomingBlock(i, cast<BasicBlock>(V));
else
assert((Flags & RF_IgnoreMissingEntries) &&
// Remap attached metadata.
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
I->getAllMetadata(MDs);
- for (SmallVectorImpl<std::pair<unsigned, MDNode *> >::iterator
- MI = MDs.begin(), ME = MDs.end(); MI != ME; ++MI) {
+ for (SmallVectorImpl<std::pair<unsigned, MDNode *>>::iterator
+ MI = MDs.begin(),
+ ME = MDs.end();
+ MI != ME; ++MI) {
MDNode *Old = MI->second;
- MDNode *New = MapValue(Old, VMap, Flags, TypeMapper);
+ MDNode *New = MapValue(Old, VMap, Flags, TypeMapper, Materializer);
if (New != Old)
I->setMetadata(MI->first, New);
}
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