//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
-#include "ValueMapper.h"
-#include "llvm/Constants.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/Instruction.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, std::map<const Value*, Value*> &VM) {
- Value *&VMSlot = VM[V];
- if (VMSlot) return VMSlot; // Does it exist in the map yet?
+// Out of line method to get vtable etc for class.
+void ValueMapTypeRemapper::anchor() {}
- // Global values do not need to be seeded into the ValueMap if they are using
- // the identity mapping.
- if (isa<GlobalValue>(V))
- return VMSlot = const_cast<Value*>(V);
+Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM, RemapFlags Flags,
+ ValueMapTypeRemapper *TypeMapper) {
+ 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;
+
+ // 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 (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) {
- if (isa<ConstantIntegral>(C) || isa<ConstantFP>(C) ||
- isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
- isa<UndefValue>(C) || isa<InlineAsm>(V))
- return VMSlot = C; // Primitive constants map directly
- else if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
- for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) {
- Value *MV = MapValue(CA->getOperand(i), VM);
- if (MV != CA->getOperand(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 (unsigned j = 0; j != i; ++j)
- Values.push_back(CA->getOperand(j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(CA->getOperand(i), VM)));
- return VMSlot = ConstantArray::get(CA->getType(), Values);
- }
- }
- return VMSlot = C;
+ if (NewTy != IA->getFunctionType())
+ V = InlineAsm::get(NewTy, IA->getAsmString(), IA->getConstraintString(),
+ IA->hasSideEffects(), IA->isAlignStack());
+ }
+
+ return VM[V] = const_cast<Value*>(V);
+ }
+
- } else if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
- for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
- Value *MV = MapValue(CS->getOperand(i), VM);
- if (MV != CS->getOperand(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 (unsigned j = 0; j != i; ++j)
- Values.push_back(CS->getOperand(j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(CS->getOperand(i), VM)));
- return VMSlot = ConstantStruct::get(CS->getType(), Values);
- }
- }
- return VMSlot = C;
+ if (const MDNode *MD = dyn_cast<MDNode>(V)) {
+ // 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 || MapValue(OP, VM, Flags, TypeMapper) == OP) continue;
- } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
- if (CE->getOpcode() == Instruction::Cast) {
- Constant *MV = cast<Constant>(MapValue(CE->getOperand(0), VM));
- return VMSlot = ConstantExpr::getCast(MV, CE->getType());
- } else if (CE->getOpcode() == Instruction::GetElementPtr) {
- std::vector<Constant*> Idx;
- Constant *MV = cast<Constant>(MapValue(CE->getOperand(0), VM));
- for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
- Idx.push_back(cast<Constant>(MapValue(CE->getOperand(i), VM)));
- return VMSlot = ConstantExpr::getGetElementPtr(MV, Idx);
- } else if (CE->getOpcode() == Instruction::Select) {
- Constant *MV1 = cast<Constant>(MapValue(CE->getOperand(0), VM));
- Constant *MV2 = cast<Constant>(MapValue(CE->getOperand(1), VM));
- Constant *MV3 = cast<Constant>(MapValue(CE->getOperand(2), VM));
- return VMSlot = ConstantExpr::getSelect(MV1, MV2, MV3);
- } else {
- assert(CE->getNumOperands() == 2 && "Must be binary operator?");
- Constant *MV1 = cast<Constant>(MapValue(CE->getOperand(0), VM));
- Constant *MV2 = cast<Constant>(MapValue(CE->getOperand(1), VM));
- return VMSlot = ConstantExpr::get(CE->getOpcode(), MV1, MV2);
+ // 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);
+ Elts.push_back(Op ? MapValue(Op, VM, Flags, TypeMapper) : 0);
}
-
- } else if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) {
- for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i) {
- Value *MV = MapValue(CP->getOperand(i), VM);
- if (MV != CP->getOperand(i)) {
- // This packed value must contain a reference to a global, make a new
- // packed constant and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(CP->getNumOperands());
- for (unsigned j = 0; j != i; ++j)
- Values.push_back(CP->getOperand(j));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(CP->getOperand(i), VM)));
- return VMSlot = ConstantPacked::get(Values);
- }
- }
- return VMSlot = C;
-
- } else {
- assert(0 && "Unknown type of constant!");
+ MDNode *NewMD = MDNode::get(V->getContext(), Elts);
+ Dummy->replaceAllUsesWith(NewMD);
+ VM[V] = NewMD;
+ MDNode::deleteTemporary(Dummy);
+ return NewMD;
}
+
+ VM[V] = const_cast<Value*>(V);
+ MDNode::deleteTemporary(Dummy);
+
+ // No operands needed remapping. Use an identity mapping.
+ return const_cast<Value*>(V);
}
- V->dump();
- assert(0 && "Unknown value type: why didn't it get resolved?!");
- return 0;
+ // 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 (BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
+ Function *F =
+ cast<Function>(MapValue(BA->getFunction(), VM, Flags, TypeMapper));
+ BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(), VM,
+ Flags, TypeMapper));
+ 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;
+ for (; OpNo != NumOperands; ++OpNo) {
+ Value *Op = C->getOperand(OpNo);
+ Mapped = MapValue(Op, VM, Flags, TypeMapper);
+ if (Mapped != C) break;
+ }
+
+ // 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;
+
+ // 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 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));
+ }
+
+ 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,
- std::map<const Value *, Value*> &ValueMap) {
- for (unsigned op = 0, E = I->getNumOperands(); op != E; ++op) {
- const Value *Op = I->getOperand(op);
- Value *V = MapValue(Op, ValueMap);
- assert(V && "Referenced value not in value map!");
- I->setOperand(op, V);
+void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
+ RemapFlags Flags, ValueMapTypeRemapper *TypeMapper){
+ // Remap operands.
+ for (User::op_iterator op = I->op_begin(), E = I->op_end(); op != E; ++op) {
+ Value *V = MapValue(*op, VMap, Flags, TypeMapper);
+ // 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);
+ 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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