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#include <map>
class Storage
{
typedef std::map<int, llvm::LoadInst*> LoadMap;
public:
Storage(llvm::BasicBlock *block,
llvm::Value *out,
llvm::Value *in, llvm::Value *consts);
llvm::ConstantInt *constantInt(int);
llvm::Constant *shuffleMask(int vec);
llvm::Value *inputElement(int idx);
llvm::Value *constElement(int idx);
llvm::Value *tempElement(int idx) const;
void setTempElement(int idx, llvm::Value *val);
llvm::Value *shuffleVector(llvm::Value *vec, int shuffle);
void store(int dstIdx, llvm::Value *val);
private:
llvm::BasicBlock *m_block;
llvm::Value *m_OUT;
llvm::Value *m_IN;
llvm::Value *m_CONST;
std::map<int, llvm::ConstantInt*> m_constInts;
std::map<int, llvm::Constant*> m_intVecs;
std::vector<llvm::Value*> m_temps;
LoadMap m_inputs;
LoadMap m_consts;
llvm::VectorType *m_floatVecType;
llvm::VectorType *m_intVecType;
llvm::Value *m_undefFloatVec;
llvm::Value *m_undefIntVec;
int m_shuffleId;
};
Storage::Storage(llvm::BasicBlock *block, llvm::Value *out,
llvm::Value *in, llvm::Value *consts)
: m_block(block), m_OUT(out),
m_IN(in), m_CONST(consts),
m_temps(32)
{
m_floatVecType = VectorType::get(Type::FloatTy, 4);
m_intVecType = VectorType::get(IntegerType::get(32), 4);
m_undefFloatVec = UndefValue::get(m_floatVecType);
m_undefIntVec = UndefValue::get(m_intVecType);
m_shuffleId = 0;
}
//can only build vectors with all members in the [0, 9] range
llvm::Constant *Storage::shuffleMask(int vec)
{
if (m_intVecs.find(vec) != m_intVecs.end()) {
return m_intVecs[vec];
}
int origVec = vec;
Constant* const_vec = 0;
if (origVec == 0) {
const_vec = Constant::getNullValue(m_intVecType);
} else {
int x = vec / 1000; vec -= x * 1000;
int y = vec / 100; vec -= y * 100;
int z = vec / 10; vec -= z * 10;
int w = vec;
std::vector<Constant*> elems;
elems.push_back(constantInt(x));
elems.push_back(constantInt(y));
elems.push_back(constantInt(z));
elems.push_back(constantInt(w));
const_vec = ConstantVector::get(m_intVecType, elems);
}
m_intVecs[origVec] = const_vec;
return const_vec;
}
llvm::ConstantInt *Storage::constantInt(int idx)
{
if (m_constInts.find(idx) != m_constInts.end()) {
return m_constInts[idx];
}
ConstantInt *const_int = ConstantInt::get(APInt(32, idx));
m_constInts[idx] = const_int;
return const_int;
}
llvm::Value *Storage::inputElement(int idx)
{
if (m_inputs.find(idx) != m_inputs.end()) {
return m_inputs[idx];
}
char ptrName[13];
char name[9];
snprintf(ptrName, 13, "input_ptr%d", idx);
snprintf(name, 9, "input%d", idx);
GetElementPtrInst *getElem = new GetElementPtrInst(m_IN,
constantInt(idx),
ptrName,
m_block);
LoadInst *load = new LoadInst(getElem, name,
false, m_block);
m_inputs[idx] = load;
return load;
}
llvm::Value *Storage::constElement(int idx)
{
if (m_consts.find(idx) != m_consts.end()) {
return m_consts[idx];
}
char ptrName[13];
char name[9];
snprintf(ptrName, 13, "const_ptr%d", idx);
snprintf(name, 9, "const%d", idx);
GetElementPtrInst *getElem = new GetElementPtrInst(m_CONST,
constantInt(idx),
ptrName,
m_block);
LoadInst *load = new LoadInst(getElem, name,
false, m_block);
m_consts[idx] = load;
return load;
}
llvm::Value *Storage::shuffleVector(llvm::Value *vec, int shuffle)
{
Constant *mask = shuffleMask(shuffle);
++m_shuffleId;
char name[11];
snprintf(name, 11, "shuffle%d", m_shuffleId);
ShuffleVectorInst *res =
new ShuffleVectorInst(vec, m_undefFloatVec, mask,
name, m_block);
return res;
}
llvm::Value *Storage::tempElement(int idx) const
{
Value *ret = m_temps[idx];
if (!ret)
return m_undefFloatVec;
return ret;
}
void Storage::setTempElement(int idx, llvm::Value *val)
{
m_temps[idx] = val;
}
void Storage::store(int dstIdx, llvm::Value *val)
{
char ptrName[13];
snprintf(ptrName, 13, "out_ptr%d", dstIdx);
GetElementPtrInst *getElem = new GetElementPtrInst(m_OUT,
constantInt(dstIdx),
ptrName,
m_block);
new StoreInst(val, getElem, false, m_block);
}
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