mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29149 91177308-0d34-0410-b5e6-96231b3b80d8
117 lines
4.6 KiB
C++
117 lines
4.6 KiB
C++
//===- 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 defines the MapValue function, which is shared by various parts of
|
|
// the lib/Transforms/Utils library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ValueMapper.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/GlobalValue.h"
|
|
#include "llvm/Instruction.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?
|
|
|
|
// Global values do not need to be seeded into the ValueMap if they are using
|
|
// the identity mapping.
|
|
if (isa<GlobalValue>(V) || isa<InlineAsm>(V))
|
|
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) || isa<ConstantAggregateZero>(C) ||
|
|
isa<UndefValue>(C))
|
|
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;
|
|
|
|
} 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;
|
|
|
|
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
|
|
std::vector<Constant*> Ops;
|
|
for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
|
|
Ops.push_back(cast<Constant>(MapValue(CE->getOperand(i), VM)));
|
|
return VMSlot = CE->getWithOperands(Ops);
|
|
} 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!");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// RemapInstruction - Convert the instruction operands from referencing the
|
|
/// current values into those specified by ValueMap.
|
|
///
|
|
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);
|
|
}
|
|
}
|