mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-19 19:30:10 +00:00
bc7a95eb7a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@467 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
3.8 KiB
C++
102 lines
3.8 KiB
C++
//===-- iMemory.cpp - Implement Memory instructions --------------*- C++ -*--=//
|
|
//
|
|
// This file implements the various memory related classes defined in iMemory.h
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/iMemory.h"
|
|
#include "llvm/ConstPoolVals.h"
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MemAccessInst Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// getIndexedType - Returns the type of the element that would be loaded with
|
|
// a load instruction with the specified parameters.
|
|
//
|
|
// A null type is returned if the indices are invalid for the specified
|
|
// pointer type.
|
|
//
|
|
const Type* MemAccessInst::getIndexedType(const Type *Ptr,
|
|
const vector<ConstPoolVal*> &Idx,
|
|
bool AllowStructLeaf = false) {
|
|
if (!Ptr->isPointerType()) return 0; // Type isn't a pointer type!
|
|
|
|
// Get the type pointed to...
|
|
Ptr = ((const PointerType*)Ptr)->getValueType();
|
|
|
|
if (Ptr->isStructType()) {
|
|
unsigned CurIDX = 0;
|
|
while (Ptr->isStructType()) {
|
|
if (Idx.size() == CurIDX)
|
|
return AllowStructLeaf ? Ptr : 0; // Can't load a whole structure!?!?
|
|
if (Idx[CurIDX]->getType() != Type::UByteTy) return 0; // Illegal idx
|
|
unsigned NextIdx = ((ConstPoolUInt*)Idx[CurIDX++])->getValue();
|
|
|
|
const StructType *ST = (const StructType *)Ptr;
|
|
Ptr = ST->getElementTypes()[NextIdx];
|
|
}
|
|
return Ptr;
|
|
} else if (Ptr->isArrayType()) {
|
|
assert(0 && "Loading from arrays not implemented yet!");
|
|
} else {
|
|
return (Idx.size() == 0) ? Ptr : 0; // Load directly through ptr
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// LoadInst Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
LoadInst::LoadInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
|
|
const string &Name = "")
|
|
: MemAccessInst(getIndexedType(Ptr->getType(), Idx), Load, Idx, Name) {
|
|
assert(getIndexedType(Ptr->getType(), Idx) && "Load operands invalid!");
|
|
Operands.reserve(1+Idx.size());
|
|
Operands.push_back(Use(Ptr, this));
|
|
|
|
for (unsigned i = 0, E = Idx.size(); i != E; ++i)
|
|
Operands.push_back(Use(Idx[i], this));
|
|
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// StoreInst Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
StoreInst::StoreInst(Value *Val, Value *Ptr, const vector<ConstPoolVal*> &Idx,
|
|
const string &Name = "")
|
|
: MemAccessInst(Type::VoidTy, Store, Idx, Name) {
|
|
assert(getIndexedType(Ptr->getType(), Idx) && "Store operands invalid!");
|
|
|
|
Operands.reserve(2+Idx.size());
|
|
Operands.push_back(Use(Val, this));
|
|
Operands.push_back(Use(Ptr, this));
|
|
|
|
for (unsigned i = 0, E = Idx.size(); i != E; ++i)
|
|
Operands.push_back(Use(Idx[i], this));
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// GetElementPtrInst Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
GetElementPtrInst::GetElementPtrInst(Value *Ptr,
|
|
const vector<ConstPoolVal*> &Idx,
|
|
const string &Name = "")
|
|
: MemAccessInst(PointerType::get(getIndexedType(Ptr->getType(), Idx, true)),
|
|
GetElementPtr, Idx, Name) {
|
|
assert(getIndexedType(Ptr->getType(), Idx, true) && "gep operands invalid!");
|
|
Operands.reserve(1+Idx.size());
|
|
Operands.push_back(Use(Ptr, this));
|
|
|
|
for (unsigned i = 0, E = Idx.size(); i != E; ++i)
|
|
Operands.push_back(Use(Idx[i], this));
|
|
}
|
|
|
|
bool GetElementPtrInst::isStructSelector() const {
|
|
return ((PointerType*)Operands[0]->getType())->getValueType()->isStructType();
|
|
}
|