//===- ValueMapper.cpp - Interface shared by lib/Transforms/Utils ---------===//
-//
+//
// 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.
+//
//===----------------------------------------------------------------------===//
//
// This file defines the MapValue function, which is shared by various parts of
//===----------------------------------------------------------------------===//
#include "ValueMapper.h"
+#include "llvm/Type.h"
#include "llvm/Constants.h"
-#include "llvm/Instruction.h"
+#include "llvm/Function.h"
+#include "llvm/Metadata.h"
+#include "llvm/ADT/SmallVector.h"
using namespace llvm;
-Value *llvm::MapValue(const Value *V, std::map<const Value*, Value*> &VM) {
+Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
Value *&VMSlot = VM[V];
if (VMSlot) return VMSlot; // Does it exist in the map yet?
- // Global values do not need to be seeded into the ValueMap if they are using
- // the identity mapping.
- if (isa<GlobalValue>(V))
+ // NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
+ // DenseMap. This includes any recursive calls to MapValue.
+
+ // Global values and non-function-local metadata 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) ||
+ (isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal()))
return VMSlot = const_cast<Value*>(V);
- if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) {
- if (isa<ConstantIntegral>(C) || isa<ConstantFP>(C) ||
- isa<ConstantPointerNull>(C))
- return VMSlot = C; // Primitive constants map directly
- else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(C)) {
- GlobalValue *MV = cast<GlobalValue>(MapValue((Value*)CPR->getValue(),VM));
- return VMSlot = ConstantPointerRef::get(MV);
- } else if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
- const std::vector<Use> &Vals = CA->getValues();
- for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
- Value *MV = MapValue(Vals[i], VM);
- if (MV != Vals[i]) {
- // This array must contain a reference to a global, make a new array
- // and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(Vals.size());
- for (unsigned j = 0; j != i; ++j)
- Values.push_back(cast<Constant>(Vals[j]));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(Vals[i], VM)));
- return VMSlot = ConstantArray::get(CA->getType(), Values);
- }
- }
- return VMSlot = C;
+ if (const MDNode *MD = dyn_cast<MDNode>(V)) {
+ SmallVector<Value*, 4> Elts;
+ for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i)
+ Elts.push_back(MD->getOperand(i) ? MapValue(MD->getOperand(i), VM) : 0);
+ return VM[V] = MDNode::get(V->getContext(), Elts.data(), Elts.size());
+ }
- } else if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
- const std::vector<Use> &Vals = CS->getValues();
- for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
- Value *MV = MapValue(Vals[i], VM);
- if (MV != Vals[i]) {
- // This struct must contain a reference to a global, make a new struct
- // and return it.
- //
- std::vector<Constant*> Values;
- Values.reserve(Vals.size());
- for (unsigned j = 0; j != i; ++j)
- Values.push_back(cast<Constant>(Vals[j]));
- Values.push_back(cast<Constant>(MV));
- for (++i; i != e; ++i)
- Values.push_back(cast<Constant>(MapValue(Vals[i], VM)));
- return VMSlot = ConstantStruct::get(CS->getType(), Values);
- }
+ Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V));
+ 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 VMSlot = C; // Primitive constants map directly
+
+ 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 VMSlot = C;
-
- } 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 {
- 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);
+ }
+ return VM[V] = C;
+ }
+
+ 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);
}
-
- } else {
- assert(0 && "Unknown type of constant!");
}
+ 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);
}
+
+ 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;
+ }
+
+ 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());
+}
- V->dump();
- assert(0 && "Unknown value type: why didn't it get resolved?!");
- return 0;
+/// RemapInstruction - Convert the instruction operands from referencing the
+/// current values into those specified by ValueMap.
+///
+void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &ValueMap) {
+ 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;
+ }
}
+
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