//
//===----------------------------------------------------------------------===//
-#include "ValueMapper.h"
-#include "llvm/Type.h"
-#include "llvm/Constants.h"
-#include "llvm/Function.h"
-#include "llvm/Metadata.h"
-#include "llvm/ADT/SmallVector.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Metadata.h"
using namespace llvm;
-Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
- ValueToValueMapTy::iterator VMI = VM.find(V);
- if (VMI != VM.end())
- return VMI->second; // Does it exist in the map yet?
+// 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,
+ ValueMaterializer *Materializer) {
+ ValueToValueMapTy::iterator I = VM.find(V);
- // Global values, metadata strings and inline asm do not need to be seeded into
- // the ValueMap if they are using the identity mapping.
- if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V)) {
- VM.insert(std::make_pair(V, const_cast<Value*>(V)));
- return const_cast<Value*>(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))
+ return VM[V] = const_cast<Value*>(V);
+
+ if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
+ // Inline asm may need *type* remapping.
+ FunctionType *NewTy = IA->getFunctionType();
+ if (TypeMapper) {
+ NewTy = cast<FunctionType>(TypeMapper->remapType(NewTy));
+
+ if (NewTy != IA->getFunctionType())
+ V = InlineAsm::get(NewTy, IA->getAsmString(), IA->getConstraintString(),
+ IA->hasSideEffects(), IA->isAlignStack());
+ }
+
+ return VM[V] = const_cast<Value*>(V);
}
+
if (const MDNode *MD = dyn_cast<MDNode>(V)) {
- // Insert a place holder in map to handle mdnode cycles.
- Value *TmpV = MDString::get(V->getContext(),
- std::string("llvm.md.clone.tmp." + VM.size()));
- VM.insert(std::make_pair(V, MDNode::get(V->getContext(), &TmpV, 1)));
+ // 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(), None);
+ VM[V] = Dummy;
- bool ReuseMD = true;
- SmallVector<Value*, 4> Elts;
- // If metadata element is mapped to a new value then seed metadata
- // in the map.
+ // Check all operands to see if any need to be remapped.
for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
- if (!MD->getOperand(i))
- Elts.push_back(0);
- else {
- Value *MappedOp = MapValue(MD->getOperand(i), VM);
- if (MappedOp != MD->getOperand(i))
- ReuseMD = false;
- Elts.push_back(MappedOp);
+ Value *OP = MD->getOperand(i);
+ if (OP == 0) continue;
+ Value *Mapped_OP = MapValue(OP, VM, Flags, TypeMapper, Materializer);
+ // Use identity map if Mapped_Op is null and we can ignore missing
+ // entries.
+ if (Mapped_OP == OP ||
+ (Mapped_OP == 0 && (Flags & RF_IgnoreMissingEntries)))
+ 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, Materializer);
+ // Use identity map if Mapped_Op is null and we can ignore missing
+ // entries.
+ if (Mapped_Op == 0 && (Flags & RF_IgnoreMissingEntries))
+ Mapped_Op = Op;
+ Elts.push_back(Mapped_Op);
+ }
}
+ MDNode *NewMD = MDNode::get(V->getContext(), Elts);
+ Dummy->replaceAllUsesWith(NewMD);
+ VM[V] = NewMD;
+ MDNode::deleteTemporary(Dummy);
+ return NewMD;
}
- if (ReuseMD) {
- VM.insert(std::make_pair(V, const_cast<Value*>(V)));
- return const_cast<Value*>(V);
- }
- MDNode *NewMD = MDNode::get(V->getContext(), Elts.data(), Elts.size());
- VM.insert(std::make_pair(V, NewMD));
- return NewMD;
+
+ VM[V] = const_cast<Value*>(V);
+ MDNode::deleteTemporary(Dummy);
+
+ // No operands needed remapping. Use an identity mapping.
+ return const_cast<Value*>(V);
}
+ // 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 == 0)
+ return 0;
- if (isa<ConstantInt>(C) || isa<ConstantFP>(C) ||
- isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
- isa<UndefValue>(C) || isa<MDString>(C))
- return VM[V] = C; // Primitive constants map directly
+ if (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
+ Function *F =
+ cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper, Materializer));
+ BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
+ Flags, TypeMapper, Materializer));
+ return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
+ }
- if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
- for (User::op_iterator b = CA->op_begin(), i = b, e = CA->op_end();
- i != e; ++i) {
- Value *MV = MapValue(*i, VM);
- if (MV != *i) {
- // This array must contain a reference to a global, make a new array
- // and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(CA->getNumOperands());
- for (User::op_iterator j = b; j != i; ++j)
- Values.push_back(cast<Constant>(*j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(*i, VM)));
- return VM[V] = ConstantArray::get(CA->getType(), Values);
- }
- }
- return VM[V] = C;
+ // 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;
+ for (; OpNo != NumOperands; ++OpNo) {
+ Value *Op = C->getOperand(OpNo);
+ Mapped = MapValue(Op, VM, Flags, TypeMapper, Materializer);
+ if (Mapped != C) break;
}
- if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
- for (User::op_iterator b = CS->op_begin(), i = b, e = CS->op_end();
- i != e; ++i) {
- Value *MV = MapValue(*i, VM);
- if (MV != *i) {
- // This struct must contain a reference to a global, make a new struct
- // and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(CS->getNumOperands());
- for (User::op_iterator j = b; j != i; ++j)
- Values.push_back(cast<Constant>(*j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(*i, VM)));
- return VM[V] = ConstantStruct::get(CS->getType(), Values);
- }
- }
+ // See if the type mapper wants to remap the type as well.
+ Type *NewTy = C->getType();
+ if (TypeMapper)
+ NewTy = TypeMapper->remapType(NewTy);
+
+ // If the result type and all operands match up, then just insert an identity
+ // mapping.
+ if (OpNo == NumOperands && NewTy == C->getType())
return VM[V] = C;
- }
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
- std::vector<Constant*> Ops;
- for (User::op_iterator i = CE->op_begin(), e = CE->op_end(); i != e; ++i)
- Ops.push_back(cast<Constant>(MapValue(*i, VM)));
- return VM[V] = CE->getWithOperands(Ops);
- }
+ // Okay, we need to create a new constant. We've already processed some or
+ // all of the operands, set them all up now.
+ SmallVector<Constant*, 8> Ops;
+ Ops.reserve(NumOperands);
+ for (unsigned j = 0; j != OpNo; ++j)
+ Ops.push_back(cast<Constant>(C->getOperand(j)));
- if (ConstantVector *CV = dyn_cast<ConstantVector>(C)) {
- for (User::op_iterator b = CV->op_begin(), i = b, e = CV->op_end();
- i != e; ++i) {
- Value *MV = MapValue(*i, VM);
- if (MV != *i) {
- // This vector value must contain a reference to a global, make a new
- // vector constant and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(CV->getNumOperands());
- for (User::op_iterator j = b; j != i; ++j)
- Values.push_back(cast<Constant>(*j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(*i, VM)));
- return VM[V] = ConstantVector::get(Values);
- }
- }
- return VM[V] = C;
+ // If one of the operands mismatch, push it and the other mapped operands.
+ if (OpNo != NumOperands) {
+ Ops.push_back(cast<Constant>(Mapped));
+
+ // 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, Materializer));
}
- BlockAddress *BA = cast<BlockAddress>(C);
- Function *F = cast<Function>(MapValue(BA->getFunction(), VM));
- BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(),VM));
- return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
+ return VM[V] = CE->getWithOperands(Ops, NewTy);
+ if (isa<ConstantArray>(C))
+ return VM[V] = ConstantArray::get(cast<ArrayType>(NewTy), Ops);
+ if (isa<ConstantStruct>(C))
+ return VM[V] = ConstantStruct::get(cast<StructType>(NewTy), Ops);
+ if (isa<ConstantVector>(C))
+ return VM[V] = ConstantVector::get(Ops);
+ // If this is a no-operand constant, it must be because the type was remapped.
+ if (isa<UndefValue>(C))
+ return VM[V] = UndefValue::get(NewTy);
+ if (isa<ConstantAggregateZero>(C))
+ return VM[V] = ConstantAggregateZero::get(NewTy);
+ assert(isa<ConstantPointerNull>(C));
+ return VM[V] = ConstantPointerNull::get(cast<PointerType>(NewTy));
}
/// RemapInstruction - Convert the instruction operands from referencing the
-/// current values into those specified by ValueMap.
+/// current values into those specified by VMap.
///
-void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &ValueMap) {
+void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
+ 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, ValueMap);
- assert(V && "Referenced value not in value map!");
- *op = V;
+ Value *V = MapValue(*op, VMap, Flags, TypeMapper, Materializer);
+ // If we aren't ignoring missing entries, assert that something happened.
+ if (V != 0)
+ *op = V;
+ else
+ assert((Flags & RF_IgnoreMissingEntries) &&
+ "Referenced value not in value map!");
}
-}
+ // Remap phi nodes' incoming blocks.
+ if (PHINode *PN = dyn_cast<PHINode>(I)) {
+ 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)
+ PN->setIncomingBlock(i, cast<BasicBlock>(V));
+ else
+ assert((Flags & RF_IgnoreMissingEntries) &&
+ "Referenced block not in value map!");
+ }
+ }
+
+ // 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) {
+ MDNode *Old = MI->second;
+ MDNode *New = MapValue(Old, VMap, Flags, TypeMapper, Materializer);
+ if (New != Old)
+ I->setMetadata(MI->first, New);
+ }
+
+ // If the instruction's type is being remapped, do so now.
+ if (TypeMapper)
+ I->mutateType(TypeMapper->remapType(I->getType()));
+}
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