Transforms/InstCombine/InstCombineSelect.cpp

281 /// We have (select c, TI, FI), and we know that TI and FI have the same opcode.
282 Instruction *InstCombiner::foldSelectOpOp(SelectInst &SI, Instruction *TI,
297   if (TI->getNumOperands() == 1 && TI->isCast()) {
299     if (TI->getOperand(0)->getType() != FIOpndTy)
318       if (TI->getOpcode() != Instruction::BitCast &&
319           (!TI->hasOneUse() || !FI->hasOneUse()))
321     } else if (!TI->hasOneUse() || !FI->hasOneUse()) {
330         Builder.CreateSelect(Cond, TI->getOperand(0), FI->getOperand(0),
332     return CastInst::Create(Instruction::CastOps(TI->getOpcode()), NewSI,
333                             TI->getType());
338   if (match(TI, m_FNeg(m_Value(X))) && match(FI, m_FNeg(m_Value(Y))) &&
339       (TI->hasOneUse() || FI->hasOneUse())) {
343     if (TI->getOpcode() != Instruction::FNeg)
344       return BinaryOperator::CreateFNegFMF(NewSel, cast<BinaryOperator>(TI));
352   if (TI->getNumOperands() != 2 || FI->getNumOperands() != 2 ||
353       (!isa<BinaryOperator>(TI) && !isa<GetElementPtrInst>(TI)) ||
354       !TI->hasOneUse() || !FI->hasOneUse())
360   if (TI->getOperand(0) == FI->getOperand(0)) {
361     MatchOp  = TI->getOperand(0);
362     OtherOpT = TI->getOperand(1);
365   } else if (TI->getOperand(1) == FI->getOperand(1)) {
366     MatchOp  = TI->getOperand(1);
367     OtherOpT = TI->getOperand(0);
370   } else if (!TI->isCommutative()) {
372   } else if (TI->getOperand(0) == FI->getOperand(1)) {
373     MatchOp  = TI->getOperand(0);
374     OtherOpT = TI->getOperand(1);
377   } else if (TI->getOperand(1) == FI->getOperand(0)) {
378     MatchOp  = TI->getOperand(1);
379     OtherOpT = TI->getOperand(0);
398   if (auto *BO = dyn_cast<BinaryOperator>(TI)) {
400     NewBO->copyIRFlags(TI);
404   if (auto *TGEP = dyn_cast<GetElementPtrInst>(TI)) {
1684   auto *TI = dyn_cast<Instruction>(TrueVal);
1686   if (!TI || !FI || !TI->hasOneUse() || !FI->hasOneUse())
1690   if ((TI->getOpcode() == Instruction::Sub &&
1692       (TI->getOpcode() == Instruction::FSub &&
1695     SubOp = TI;
1697               TI->getOpcode() == Instruction::Add) ||
1699               TI->getOpcode() == Instruction::FAdd)) {
1700     AddOp = TI;
1729       if (AddOp != TI)
2525   auto *TI = dyn_cast<Instruction>(TrueVal);
2527   if (TI && FI && TI->getOpcode() == FI->getOpcode())
2528     if (Instruction *IV = foldSelectOpOp(SI, TI, FI))