mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 19:29:22 +00:00
fix: add a flag to MapValue and friends which indicates whether any module-level mappings are being made. In the common case of inlining, no module-level mappings are needed, so MapValue doesn't need to examine non-function-local metadata, which can be very expensive in the case of a large module with really deep metadata (e.g. a large C++ program compiled with -g). This flag is a little awkward; perhaps eventually it can be moved into the ClonedCodeInfo class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112190 91177308-0d34-0410-b5e6-96231b3b80d8
178 lines
6.7 KiB
C++
178 lines
6.7 KiB
C++
//===- 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 "llvm/Transforms/Utils/ValueMapper.h"
|
|
#include "llvm/Type.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/Metadata.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
using namespace llvm;
|
|
|
|
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM,
|
|
bool ModuleLevelChanges) {
|
|
Value *&VMSlot = VM[V];
|
|
if (VMSlot) return VMSlot; // Does it exist in the map yet?
|
|
|
|
// NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
|
|
// DenseMap. This includes any recursive calls to MapValue.
|
|
|
|
// Global values do not need to be seeded into the VM if they
|
|
// are using the identity mapping.
|
|
if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V) ||
|
|
(isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal() &&
|
|
!ModuleLevelChanges))
|
|
return VMSlot = const_cast<Value*>(V);
|
|
|
|
if (const MDNode *MD = dyn_cast<MDNode>(V)) {
|
|
// Start by assuming that we'll use the identity mapping.
|
|
VMSlot = const_cast<Value*>(V);
|
|
|
|
// 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 || MapValue(OP, VM, ModuleLevelChanges) == OP) continue;
|
|
|
|
// Ok, at least one operand needs remapping.
|
|
MDNode *Dummy = MDNode::getTemporary(V->getContext(), 0, 0);
|
|
VM[V] = Dummy;
|
|
SmallVector<Value*, 4> Elts;
|
|
Elts.reserve(MD->getNumOperands());
|
|
for (i = 0; i != e; ++i)
|
|
Elts.push_back(MD->getOperand(i) ?
|
|
MapValue(MD->getOperand(i), VM, ModuleLevelChanges) : 0);
|
|
MDNode *NewMD = MDNode::get(V->getContext(), Elts.data(), Elts.size());
|
|
Dummy->replaceAllUsesWith(NewMD);
|
|
MDNode::deleteTemporary(Dummy);
|
|
return VM[V] = NewMD;
|
|
}
|
|
|
|
// No operands needed remapping; keep the identity map.
|
|
return const_cast<Value*>(V);
|
|
}
|
|
|
|
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))
|
|
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, ModuleLevelChanges);
|
|
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,
|
|
ModuleLevelChanges)));
|
|
return VM[V] = ConstantArray::get(CA->getType(), Values);
|
|
}
|
|
}
|
|
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, ModuleLevelChanges);
|
|
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,
|
|
ModuleLevelChanges)));
|
|
return VM[V] = ConstantStruct::get(CS->getType(), Values);
|
|
}
|
|
}
|
|
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, ModuleLevelChanges)));
|
|
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, ModuleLevelChanges);
|
|
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,
|
|
ModuleLevelChanges)));
|
|
return VM[V] = ConstantVector::get(Values);
|
|
}
|
|
}
|
|
return VM[V] = C;
|
|
}
|
|
|
|
BlockAddress *BA = cast<BlockAddress>(C);
|
|
Function *F = cast<Function>(MapValue(BA->getFunction(), VM,
|
|
ModuleLevelChanges));
|
|
BasicBlock *BB = cast_or_null<BasicBlock>(MapValue(BA->getBasicBlock(),VM,
|
|
ModuleLevelChanges));
|
|
return VM[V] = BlockAddress::get(F, BB ? BB : BA->getBasicBlock());
|
|
}
|
|
|
|
/// RemapInstruction - Convert the instruction operands from referencing the
|
|
/// current values into those specified by VMap.
|
|
///
|
|
void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
|
|
bool ModuleLevelChanges) {
|
|
// Remap operands.
|
|
for (User::op_iterator op = I->op_begin(), E = I->op_end(); op != E; ++op) {
|
|
Value *V = MapValue(*op, VMap, ModuleLevelChanges);
|
|
assert(V && "Referenced value not in value map!");
|
|
*op = V;
|
|
}
|
|
|
|
// 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) {
|
|
Value *Old = MI->second;
|
|
Value *New = MapValue(Old, VMap, ModuleLevelChanges);
|
|
if (New != Old)
|
|
I->setMetadata(MI->first, cast<MDNode>(New));
|
|
}
|
|
}
|