2002-11-20 20:47:41 +00:00
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//===- ValueMapper.cpp - Interface shared by lib/Transforms/Utils ---------===//
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2005-04-21 23:48:37 +00:00
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//
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2003-10-20 19:43:21 +00:00
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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2005-04-21 23:48:37 +00:00
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//
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2003-10-20 19:43:21 +00:00
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//===----------------------------------------------------------------------===//
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2002-11-20 20:47:41 +00:00
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//
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// This file defines the MapValue function, which is shared by various parts of
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// the lib/Transforms/Utils library.
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//
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//===----------------------------------------------------------------------===//
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#include "ValueMapper.h"
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#include "llvm/Constants.h"
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2004-07-18 00:44:37 +00:00
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#include "llvm/GlobalValue.h"
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2002-11-20 20:47:41 +00:00
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#include "llvm/Instruction.h"
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2004-01-09 06:12:26 +00:00
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using namespace llvm;
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2002-11-20 20:47:41 +00:00
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2007-02-03 00:08:31 +00:00
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Value *llvm::MapValue(const Value *V, ValueMapTy &VM) {
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2002-11-20 20:47:41 +00:00
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Value *&VMSlot = VM[V];
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if (VMSlot) return VMSlot; // Does it exist in the map yet?
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2007-02-03 00:08:31 +00:00
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// NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
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// DenseMap. This includes any recursive calls to MapValue.
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2005-04-21 23:48:37 +00:00
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2003-10-06 15:23:43 +00:00
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// Global values do not need to be seeded into the ValueMap if they are using
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// the identity mapping.
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2006-04-01 23:17:11 +00:00
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if (isa<GlobalValue>(V) || isa<InlineAsm>(V))
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2003-10-06 15:23:43 +00:00
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return VMSlot = const_cast<Value*>(V);
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2003-04-18 03:49:49 +00:00
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if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) {
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2007-01-11 12:24:14 +00:00
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if (isa<ConstantInt>(C) || isa<ConstantFP>(C) ||
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2004-10-16 18:10:31 +00:00
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isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
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2006-05-27 01:22:24 +00:00
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isa<UndefValue>(C))
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2002-11-20 20:47:41 +00:00
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return VMSlot = C; // Primitive constants map directly
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2004-07-18 08:41:47 +00:00
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else if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
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2004-08-04 08:44:43 +00:00
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for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) {
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Value *MV = MapValue(CA->getOperand(i), VM);
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if (MV != CA->getOperand(i)) {
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2002-11-20 20:47:41 +00:00
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// This array must contain a reference to a global, make a new array
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// and return it.
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//
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std::vector<Constant*> Values;
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Values.reserve(CA->getNumOperands());
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2002-11-20 20:47:41 +00:00
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for (unsigned j = 0; j != i; ++j)
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Values.push_back(CA->getOperand(j));
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2002-11-20 20:47:41 +00:00
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Values.push_back(cast<Constant>(MV));
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2002-12-07 21:27:16 +00:00
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for (++i; i != e; ++i)
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2004-08-04 08:44:43 +00:00
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Values.push_back(cast<Constant>(MapValue(CA->getOperand(i), VM)));
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2007-02-03 00:08:31 +00:00
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return VM[V] = ConstantArray::get(CA->getType(), Values);
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2002-11-20 20:47:41 +00:00
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}
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}
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2007-02-03 00:08:31 +00:00
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return VM[V] = C;
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2002-11-20 20:47:41 +00:00
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} else if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
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2004-08-04 08:44:43 +00:00
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for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
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Value *MV = MapValue(CS->getOperand(i), VM);
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if (MV != CS->getOperand(i)) {
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2002-11-20 20:47:41 +00:00
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// This struct must contain a reference to a global, make a new struct
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// and return it.
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//
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std::vector<Constant*> Values;
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2004-08-04 08:44:43 +00:00
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Values.reserve(CS->getNumOperands());
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2002-11-20 20:47:41 +00:00
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for (unsigned j = 0; j != i; ++j)
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2004-08-04 08:44:43 +00:00
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Values.push_back(CS->getOperand(j));
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2002-11-20 20:47:41 +00:00
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Values.push_back(cast<Constant>(MV));
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2002-12-07 21:27:16 +00:00
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for (++i; i != e; ++i)
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2004-08-04 08:44:43 +00:00
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Values.push_back(cast<Constant>(MapValue(CS->getOperand(i), VM)));
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2007-02-03 00:08:31 +00:00
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return VM[V] = ConstantStruct::get(CS->getType(), Values);
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2002-11-20 20:47:41 +00:00
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}
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}
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2007-02-03 00:08:31 +00:00
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return VM[V] = C;
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2002-11-20 20:47:41 +00:00
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} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
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2006-07-14 22:21:31 +00:00
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std::vector<Constant*> Ops;
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for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
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Ops.push_back(cast<Constant>(MapValue(CE->getOperand(i), VM)));
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2007-02-03 00:08:31 +00:00
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return VM[V] = CE->getWithOperands(Ops);
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2007-02-15 02:26:10 +00:00
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} else if (ConstantVector *CP = dyn_cast<ConstantVector>(C)) {
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2006-03-27 05:50:18 +00:00
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for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i) {
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Value *MV = MapValue(CP->getOperand(i), VM);
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if (MV != CP->getOperand(i)) {
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// This packed value must contain a reference to a global, make a new
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// packed constant and return it.
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//
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std::vector<Constant*> Values;
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Values.reserve(CP->getNumOperands());
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for (unsigned j = 0; j != i; ++j)
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Values.push_back(CP->getOperand(j));
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Values.push_back(cast<Constant>(MV));
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for (++i; i != e; ++i)
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Values.push_back(cast<Constant>(MapValue(CP->getOperand(i), VM)));
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2007-02-15 02:26:10 +00:00
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return VM[V] = ConstantVector::get(Values);
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2006-03-27 05:50:18 +00:00
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}
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}
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2007-02-23 19:54:30 +00:00
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return VM[V] = C;
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2006-03-27 05:50:18 +00:00
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2002-11-20 20:47:41 +00:00
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} else {
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assert(0 && "Unknown type of constant!");
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}
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}
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2003-01-13 00:52:25 +00:00
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2002-11-20 20:47:41 +00:00
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return 0;
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}
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2004-05-19 09:08:12 +00:00
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/// RemapInstruction - Convert the instruction operands from referencing the
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/// current values into those specified by ValueMap.
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///
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2007-02-03 00:08:31 +00:00
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void llvm::RemapInstruction(Instruction *I, ValueMapTy &ValueMap) {
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2004-05-19 09:08:12 +00:00
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for (unsigned op = 0, E = I->getNumOperands(); op != E; ++op) {
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const Value *Op = I->getOperand(op);
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Value *V = MapValue(Op, ValueMap);
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assert(V && "Referenced value not in value map!");
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I->setOperand(op, V);
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}
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}
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