X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTransforms%2FUtils%2FValueMapper.cpp;h=87ce631ca62648cd11791d2ad44447820c6ebbd5;hb=170f06ebe2e80ce8bda87425081541493056fb10;hp=484765a7e25a19b0d51db3a005e016f88c8fd404;hpb=15faa8498cda80828e292e6954e4bfe648d78572;p=oota-llvm.git diff --git a/lib/Transforms/Utils/ValueMapper.cpp b/lib/Transforms/Utils/ValueMapper.cpp index 484765a7e25..87ce631ca62 100644 --- a/lib/Transforms/Utils/ValueMapper.cpp +++ b/lib/Transforms/Utils/ValueMapper.cpp @@ -1,89 +1,137 @@ //===- ValueMapper.cpp - Interface shared by lib/Transforms/Utils ---------===// // +// The LLVM Compiler Infrastructure +// +// 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 // the lib/Transforms/Utils library. // //===----------------------------------------------------------------------===// #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 *MapValue(const Value *V, std::map &VM) { +Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) { Value *&VMSlot = VM[V]; if (VMSlot) return VMSlot; // Does it exist in the map yet? - if (Constant *C = const_cast(dyn_cast(V))) { - if (isa(C) || isa(C) || - isa(C)) - return VMSlot = C; // Primitive constants map directly - else if (ConstantPointerRef *CPR = dyn_cast(C)) { - GlobalValue *MV = cast(MapValue((Value*)CPR->getValue(),VM)); - return VMSlot = ConstantPointerRef::get(MV); - } else if (ConstantArray *CA = dyn_cast(C)) { - const std::vector &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 Values; - Values.reserve(Vals.size()); - for (unsigned j = 0; j != i; ++j) - Values.push_back(cast(Vals[j])); - Values.push_back(cast(MV)); - for (++i; i != e; ++i) - Values.push_back(cast(MapValue(Vals[i], VM))); - return VMSlot = ConstantArray::get(CA->getType(), Values); - } - } - return VMSlot = C; + // NOTE: VMSlot can be invalidated by any reference to VM, which can grow the + // DenseMap. This includes any recursive calls to MapValue. - } else if (ConstantStruct *CS = dyn_cast(C)) { - const std::vector &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 Values; - Values.reserve(Vals.size()); - for (unsigned j = 0; j != i; ++j) - Values.push_back(cast(Vals[j])); - Values.push_back(cast(MV)); - for (++i; i != e; ++i) - Values.push_back(cast(MapValue(Vals[i], VM))); - return VMSlot = ConstantStruct::get(CS->getType(), Values); - } - } - return VMSlot = C; + // 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(V) || isa(V) || isa(V) || + (isa(V) && !cast(V)->isFunctionLocal())) + return VMSlot = const_cast(V); - } else if (ConstantExpr *CE = dyn_cast(C)) { - if (CE->getOpcode() == Instruction::Cast) { - Constant *MV = cast(MapValue(CE->getOperand(0), VM)); - return VMSlot = ConstantExpr::getCast(MV, CE->getType()); - } else if (CE->getOpcode() == Instruction::GetElementPtr) { - std::vector Idx; - Constant *MV = cast(MapValue(CE->getOperand(0), VM)); - for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) - Idx.push_back(cast(MapValue(CE->getOperand(i), VM))); - return VMSlot = ConstantExpr::getGetElementPtr(MV, Idx); - } else { - assert(CE->getNumOperands() == 2 && "Must be binary operator?"); - Constant *MV1 = cast(MapValue(CE->getOperand(0), VM)); - Constant *MV2 = cast(MapValue(CE->getOperand(1), VM)); - return VMSlot = ConstantExpr::get(CE->getOpcode(), MV1, MV2); - } + if (const MDNode *MD = dyn_cast(V)) { + SmallVector 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 { - assert(0 && "Unknown type of constant!"); + Constant *C = const_cast(dyn_cast(V)); + if (C == 0) return 0; + + if (isa(C) || isa(C) || + isa(C) || isa(C) || + isa(C) || isa(C)) + return VMSlot = C; // Primitive constants map directly + + if (ConstantArray *CA = dyn_cast(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 Values; + Values.reserve(CA->getNumOperands()); + for (User::op_iterator j = b; j != i; ++j) + Values.push_back(cast(*j)); + Values.push_back(cast(MV)); + for (++i; i != e; ++i) + Values.push_back(cast(MapValue(*i, VM))); + return VM[V] = ConstantArray::get(CA->getType(), Values); + } + } + return VM[V] = C; + } + + if (ConstantStruct *CS = dyn_cast(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 Values; + Values.reserve(CS->getNumOperands()); + for (User::op_iterator j = b; j != i; ++j) + Values.push_back(cast(*j)); + Values.push_back(cast(MV)); + for (++i; i != e; ++i) + Values.push_back(cast(MapValue(*i, VM))); + return VM[V] = ConstantStruct::get(CS->getType(), Values); + } + } + return VM[V] = C; + } + + if (ConstantExpr *CE = dyn_cast(C)) { + std::vector Ops; + for (User::op_iterator i = CE->op_begin(), e = CE->op_end(); i != e; ++i) + Ops.push_back(cast(MapValue(*i, VM))); + return VM[V] = CE->getWithOperands(Ops); + } + + if (ConstantVector *CV = dyn_cast(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 Values; + Values.reserve(CV->getNumOperands()); + for (User::op_iterator j = b; j != i; ++j) + Values.push_back(cast(*j)); + Values.push_back(cast(MV)); + for (++i; i != e; ++i) + Values.push_back(cast(MapValue(*i, VM))); + return VM[V] = ConstantVector::get(Values); + } } + return VM[V] = C; } + + BlockAddress *BA = cast(C); + Function *F = cast(MapValue(BA->getFunction(), VM)); + BasicBlock *BB = cast_or_null(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; + } }