///
class FAddend {
public:
- FAddend() { Val = 0; }
+ FAddend() { Val = nullptr; }
Value *getSymVal (void) const { return Val; }
const FAddendCoef &getCoef(void) const { return Coeff; }
- bool isConstant() const { return Val == 0; }
+ bool isConstant() const { return Val == nullptr; }
bool isZero() const { return Coeff.isZero(); }
void set(short Coefficient, Value *V) { Coeff.set(Coefficient), Val = V; }
///
class FAddCombine {
public:
- FAddCombine(InstCombiner::BuilderTy *B) : Builder(B), Instr(0) {}
+ FAddCombine(InstCombiner::BuilderTy *B) : Builder(B), Instr(nullptr) {}
Value *simplify(Instruction *FAdd);
private:
//
unsigned FAddend::drillValueDownOneStep
(Value *Val, FAddend &Addend0, FAddend &Addend1) {
- Instruction *I = 0;
- if (Val == 0 || !(I = dyn_cast<Instruction>(Val)))
+ Instruction *I = nullptr;
+ if (!Val || !(I = dyn_cast<Instruction>(Val)))
return 0;
unsigned Opcode = I->getOpcode();
Value *Opnd0 = I->getOperand(0);
Value *Opnd1 = I->getOperand(1);
if ((C0 = dyn_cast<ConstantFP>(Opnd0)) && C0->isZero())
- Opnd0 = 0;
+ Opnd0 = nullptr;
if ((C1 = dyn_cast<ConstantFP>(Opnd1)) && C1->isZero())
- Opnd1 = 0;
+ Opnd1 = nullptr;
if (Opnd0) {
if (!C0)
Addend0.set(1, Opnd0);
else
- Addend0.set(C0, 0);
+ Addend0.set(C0, nullptr);
}
if (Opnd1) {
if (!C1)
Addend.set(1, Opnd1);
else
- Addend.set(C1, 0);
+ Addend.set(C1, nullptr);
if (Opcode == Instruction::FSub)
Addend.negate();
}
return Opnd0 && Opnd1 ? 2 : 1;
// Both operands are zero. Weird!
- Addend0.set(APFloat(C0->getValueAPF().getSemantics()), 0);
+ Addend0.set(APFloat(C0->getValueAPF().getSemantics()), nullptr);
return 1;
}
Instruction *I1 = dyn_cast<Instruction>(I->getOperand(1));
if (!I0 || !I1 || I0->getOpcode() != I1->getOpcode())
- return 0;
+ return nullptr;
bool isMpy = false;
if (I0->getOpcode() == Instruction::FMul)
isMpy = true;
else if (I0->getOpcode() != Instruction::FDiv)
- return 0;
+ return nullptr;
Value *Opnd0_0 = I0->getOperand(0);
Value *Opnd0_1 = I0->getOperand(1);
// (x*y) +/- (x*z) x y z
// (y/x) +/- (z/x) x y z
//
- Value *Factor = 0;
- Value *AddSub0 = 0, *AddSub1 = 0;
+ Value *Factor = nullptr;
+ Value *AddSub0 = nullptr, *AddSub1 = nullptr;
if (isMpy) {
if (Opnd0_0 == Opnd1_0 || Opnd0_0 == Opnd1_1)
}
if (!Factor)
- return 0;
+ return nullptr;
FastMathFlags Flags;
Flags.setUnsafeAlgebra();
if (ConstantFP *CFP = dyn_cast<ConstantFP>(NewAddSub)) {
const APFloat &F = CFP->getValueAPF();
if (!F.isNormal())
- return 0;
+ return nullptr;
} else if (Instruction *II = dyn_cast<Instruction>(NewAddSub))
II->setFastMathFlags(Flags);
// Currently we are not able to handle vector type.
if (I->getType()->isVectorTy())
- return 0;
+ return nullptr;
assert((I->getOpcode() == Instruction::FAdd ||
I->getOpcode() == Instruction::FSub) && "Expect add/sub");
// been optimized into "I = Y - X" in the previous steps.
//
const FAddendCoef &CE = Opnd0.getCoef();
- return CE.isOne() ? Opnd0.getSymVal() : 0;
+ return CE.isOne() ? Opnd0.getSymVal() : nullptr;
}
// step 4: Try to optimize Opnd0 + Opnd1_0 [+ Opnd1_1]
// constant close to supper-expr(s) will potentially reveal some optimization
// opportunities in super-expr(s).
//
- const FAddend *ConstAdd = 0;
+ const FAddend *ConstAdd = nullptr;
// Simplified addends are placed <SimpVect>.
AddendVect SimpVect;
if (T && T->getSymVal() == Val) {
// Set null such that next iteration of the outer loop will not process
// this addend again.
- Addends[SameSymIdx] = 0;
+ Addends[SameSymIdx] = nullptr;
SimpVect.push_back(T);
}
}
// Pop all addends being folded and push the resulting folded addend.
SimpVect.resize(StartIdx);
- if (Val != 0) {
+ if (Val) {
if (!R.isZero()) {
SimpVect.push_back(&R);
}
//
unsigned InstrNeeded = calcInstrNumber(Opnds);
if (InstrNeeded > InstrQuota)
- return 0;
+ return nullptr;
initCreateInstNum();
// N-ary addition has at most two instructions, and we don't need to worry
// about tree-height when constructing the N-ary addition.
- Value *LastVal = 0;
+ Value *LastVal = nullptr;
bool LastValNeedNeg = false;
// Iterate the addends, creating fadd/fsub using adjacent two addends.
//
static inline Value *dyn_castFoldableMul(Value *V, Constant *&CST) {
if (!V->hasOneUse() || !V->getType()->isIntOrIntVectorTy())
- return 0;
+ return nullptr;
Instruction *I = dyn_cast<Instruction>(V);
- if (I == 0) return 0;
+ if (!I) return nullptr;
if (I->getOpcode() == Instruction::Mul)
if ((CST = dyn_cast<Constant>(I->getOperand(1))))
CST = ConstantExpr::getShl(ConstantInt::get(V->getType(), 1), CST);
return I->getOperand(0);
}
- return 0;
+ return nullptr;
}
if (ZI->getSrcTy()->isIntegerTy(1))
return SelectInst::Create(ZI->getOperand(0), AddOne(CI), CI);
- Value *XorLHS = 0; ConstantInt *XorRHS = 0;
+ Value *XorLHS = nullptr; ConstantInt *XorRHS = nullptr;
if (match(LHS, m_Xor(m_Value(XorLHS), m_ConstantInt(XorRHS)))) {
uint32_t TySizeBits = I.getType()->getScalarSizeInBits();
const APInt &RHSVal = CI->getValue();
// Check for (x & y) + (x ^ y)
{
- Value *A = 0, *B = 0;
+ Value *A = nullptr, *B = nullptr;
if (match(RHS, m_Xor(m_Value(A), m_Value(B))) &&
(match(LHS, m_And(m_Specific(A), m_Specific(B))) ||
match(LHS, m_And(m_Specific(B), m_Specific(A)))))
return BinaryOperator::CreateOr(A, B);
}
- return Changed ? &I : 0;
+ return Changed ? &I : nullptr;
}
Instruction *InstCombiner::visitFAdd(BinaryOperator &I) {
if (match(LHS, m_Select(m_Value(C1), m_Value(A1), m_Value(B1))) &&
match(RHS, m_Select(m_Value(C2), m_Value(A2), m_Value(B2)))) {
if (C1 == C2) {
- Constant *Z1=0, *Z2=0;
+ Constant *Z1=nullptr, *Z2=nullptr;
Value *A, *B, *C=C1;
if (match(A1, m_AnyZero()) && match(B2, m_AnyZero())) {
Z1 = dyn_cast<Constant>(A1); A = A2;
return ReplaceInstUsesWith(I, V);
}
- return Changed ? &I : 0;
+ return Changed ? &I : nullptr;
}
// If LHS is a gep based on RHS or RHS is a gep based on LHS, we can optimize
// this.
bool Swapped = false;
- GEPOperator *GEP1 = 0, *GEP2 = 0;
+ GEPOperator *GEP1 = nullptr, *GEP2 = nullptr;
// For now we require one side to be the base pointer "A" or a constant
// GEP derived from it.
// Avoid duplicating the arithmetic if GEP2 has non-constant indices and
// multiple users.
- if (GEP1 == 0 ||
- (GEP2 != 0 && !GEP2->hasAllConstantIndices() && !GEP2->hasOneUse()))
- return 0;
+ if (!GEP1 ||
+ (GEP2 && !GEP2->hasAllConstantIndices() && !GEP2->hasOneUse()))
+ return nullptr;
// Emit the offset of the GEP and an intptr_t.
Value *Result = EmitGEPOffset(GEP1);
if (Constant *C = dyn_cast<Constant>(Op0)) {
// C - ~X == X + (1+C)
- Value *X = 0;
+ Value *X = nullptr;
if (match(Op1, m_Not(m_Value(X))))
return BinaryOperator::CreateAdd(X, AddOne(C));
}
if (Op1->hasOneUse()) {
- Value *X = 0, *Y = 0, *Z = 0;
- Constant *C = 0;
- Constant *CI = 0;
+ Value *X = nullptr, *Y = nullptr, *Z = nullptr;
+ Constant *C = nullptr;
+ Constant *CI = nullptr;
// (X - (Y - Z)) --> (X + (Z - Y)).
if (match(Op1, m_Sub(m_Value(Y), m_Value(Z))))
return ReplaceInstUsesWith(I, Res);
}
- return 0;
+ return nullptr;
}
Instruction *InstCombiner::visitFSub(BinaryOperator &I) {
return ReplaceInstUsesWith(I, V);
}
- return 0;
+ return nullptr;
}
projects / oota-llvm.git / blobdiff