using namespace llvm;
+#define DEBUG_TYPE "systemz-isel"
+
namespace {
// Used to build addressing modes.
struct SystemZAddressingMode {
errs() << "SystemZAddressingMode " << this << '\n';
errs() << " Base ";
- if (Base.getNode() != 0)
+ if (Base.getNode())
Base.getNode()->dump();
else
errs() << "null\n";
if (hasIndexField()) {
errs() << " Index ";
- if (Index.getNode() != 0)
+ if (Index.getNode())
Index.getNode()->dump();
else
errs() << "null\n";
};
class SystemZDAGToDAGISel : public SelectionDAGISel {
- const SystemZTargetLowering &Lowering;
- const SystemZSubtarget &Subtarget;
+ const SystemZSubtarget *Subtarget;
// Used by SystemZOperands.td to create integer constants.
inline SDValue getImm(const SDNode *Node, uint64_t Imm) const {
}
const SystemZInstrInfo *getInstrInfo() const {
- return getTargetMachine().getInstrInfo();
+ return Subtarget->getInstrInfo();
}
// Try to fold more of the base or index of AM into AM, where IsBase
public:
SystemZDAGToDAGISel(SystemZTargetMachine &TM, CodeGenOpt::Level OptLevel)
- : SelectionDAGISel(TM, OptLevel),
- Lowering(*TM.getTargetLowering()),
- Subtarget(*TM.getSubtargetImpl()) { }
+ : SelectionDAGISel(TM, OptLevel) {}
+
+ bool runOnMachineFunction(MachineFunction &MF) override {
+ Subtarget = &MF.getSubtarget<SystemZSubtarget>();
+ return SelectionDAGISel::runOnMachineFunction(MF);
+ }
// Override MachineFunctionPass.
- virtual const char *getPassName() const LLVM_OVERRIDE {
+ const char *getPassName() const override {
return "SystemZ DAG->DAG Pattern Instruction Selection";
}
// Override SelectionDAGISel.
- virtual SDNode *Select(SDNode *Node) LLVM_OVERRIDE;
- virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
- char ConstraintCode,
- std::vector<SDValue> &OutOps)
- LLVM_OVERRIDE;
+ SDNode *Select(SDNode *Node) override;
+ bool SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode,
+ std::vector<SDValue> &OutOps) override;
// Include the pieces autogenerated from the target description.
#include "SystemZGenDAGISel.inc"
return false;
// We need a constant mask.
- ConstantSDNode *MaskNode =
- dyn_cast<ConstantSDNode>(Op.getOperand(1).getNode());
+ auto *MaskNode = dyn_cast<ConstantSDNode>(Op.getOperand(1).getNode());
if (!MaskNode)
return false;
uint64_t Used = allOnes(Op.getValueType().getSizeInBits());
if (Used != (AndMask | InsertMask)) {
APInt KnownZero, KnownOne;
- CurDAG->ComputeMaskedBits(Op.getOperand(0), KnownZero, KnownOne);
+ CurDAG->computeKnownBits(Op.getOperand(0), KnownZero, KnownOne);
if (Used != (AndMask | InsertMask | KnownZero.getZExtValue()))
return false;
}
if (RxSBG.Opcode == SystemZ::RNSBG)
return false;
- ConstantSDNode *MaskNode =
- dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
+ auto *MaskNode = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
if (!MaskNode)
return false;
// been removed from the mask. See if adding them back in makes the
// mask suitable.
APInt KnownZero, KnownOne;
- CurDAG->ComputeMaskedBits(Input, KnownZero, KnownOne);
+ CurDAG->computeKnownBits(Input, KnownZero, KnownOne);
Mask |= KnownZero.getZExtValue();
if (!refineRxSBGMask(RxSBG, Mask))
return false;
if (RxSBG.Opcode != SystemZ::RNSBG)
return false;
- ConstantSDNode *MaskNode =
- dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
+ auto *MaskNode = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
if (!MaskNode)
return false;
// been removed from the mask. See if adding them back in makes the
// mask suitable.
APInt KnownZero, KnownOne;
- CurDAG->ComputeMaskedBits(Input, KnownZero, KnownOne);
+ CurDAG->computeKnownBits(Input, KnownZero, KnownOne);
Mask &= ~KnownOne.getZExtValue();
if (!refineRxSBGMask(RxSBG, Mask))
return false;
// Any 64-bit rotate left can be merged into the RxSBG.
if (RxSBG.BitSize != 64 || N.getValueType() != MVT::i64)
return false;
- ConstantSDNode *CountNode
- = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
+ auto *CountNode = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
if (!CountNode)
return false;
return true;
}
- case ISD::SIGN_EXTEND:
+ case ISD::ANY_EXTEND:
+ // Bits above the extended operand are don't-care.
+ RxSBG.Input = N.getOperand(0);
+ return true;
+
case ISD::ZERO_EXTEND:
- case ISD::ANY_EXTEND: {
+ if (RxSBG.Opcode != SystemZ::RNSBG) {
+ // Restrict the mask to the extended operand.
+ unsigned InnerBitSize = N.getOperand(0).getValueType().getSizeInBits();
+ if (!refineRxSBGMask(RxSBG, allOnes(InnerBitSize)))
+ return false;
+
+ RxSBG.Input = N.getOperand(0);
+ return true;
+ }
+ // Fall through.
+
+ case ISD::SIGN_EXTEND: {
// Check that the extension bits are don't-care (i.e. are masked out
// by the final mask).
unsigned InnerBitSize = N.getOperand(0).getValueType().getSizeInBits();
}
case ISD::SHL: {
- ConstantSDNode *CountNode =
- dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
+ auto *CountNode = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
if (!CountNode)
return false;
case ISD::SRL:
case ISD::SRA: {
- ConstantSDNode *CountNode =
- dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
+ auto *CountNode = dyn_cast<ConstantSDNode>(N.getOperand(1).getNode());
if (!CountNode)
return false;
if (RISBG.Input.getOpcode() != ISD::ANY_EXTEND)
Count += 1;
if (Count == 0)
- return 0;
+ return nullptr;
if (Count == 1) {
// Prefer to use normal shift instructions over RISBG, since they can handle
// all cases and are sometimes shorter.
if (N->getOpcode() != ISD::AND)
- return 0;
+ return nullptr;
// Prefer register extensions like LLC over RISBG. Also prefer to start
// out with normal ANDs if one instruction would be enough. We can convert
SystemZ::isImmLF(~RISBG.Mask) ||
SystemZ::isImmHF(~RISBG.Mask)) {
// Force the new mask into the DAG, since it may include known-one bits.
- ConstantSDNode *MaskN = cast<ConstantSDNode>(N->getOperand(1).getNode());
+ auto *MaskN = cast<ConstantSDNode>(N->getOperand(1).getNode());
if (MaskN->getZExtValue() != RISBG.Mask) {
SDValue NewMask = CurDAG->getConstant(RISBG.Mask, VT);
N = CurDAG->UpdateNodeOperands(N, N->getOperand(0), NewMask);
return SelectCode(N);
}
- return 0;
+ return nullptr;
}
}
unsigned Opcode = SystemZ::RISBG;
EVT OpcodeVT = MVT::i64;
- if (VT == MVT::i32 && Subtarget.hasHighWord()) {
+ if (VT == MVT::i32 && Subtarget->hasHighWord()) {
Opcode = SystemZ::RISBMux;
OpcodeVT = MVT::i32;
RISBG.Start &= 31;
// Do nothing if neither operand is suitable.
if (Count[0] == 0 && Count[1] == 0)
- return 0;
+ return nullptr;
// Pick the deepest second operand.
unsigned I = Count[0] > Count[1] ? 0 : 1;
// Prefer IC for character insertions from memory.
if (Opcode == SystemZ::ROSBG && (RxSBG[I].Mask & 0xff) == 0)
- if (LoadSDNode *Load = dyn_cast<LoadSDNode>(Op0.getNode()))
+ if (auto *Load = dyn_cast<LoadSDNode>(Op0.getNode()))
if (Load->getMemoryVT() == MVT::i8)
- return 0;
+ return nullptr;
// See whether we can avoid an AND in the first operand by converting
// ROSBG to RISBG.
return true;
// Otherwise we need to check whether there's an alias.
- const Value *V1 = Load->getSrcValue();
- const Value *V2 = Store->getSrcValue();
+ const Value *V1 = Load->getMemOperand()->getValue();
+ const Value *V2 = Store->getMemOperand()->getValue();
if (!V1 || !V2)
return false;
if (V1 == V2 && End1 == End2)
return false;
- return !AA->alias(AliasAnalysis::Location(V1, End1, Load->getTBAAInfo()),
- AliasAnalysis::Location(V2, End2, Store->getTBAAInfo()));
+ return !AA->alias(AliasAnalysis::Location(V1, End1, Load->getAAInfo()),
+ AliasAnalysis::Location(V2, End2, Store->getAAInfo()));
}
bool SystemZDAGToDAGISel::storeLoadCanUseMVC(SDNode *N) const {
- StoreSDNode *Store = cast<StoreSDNode>(N);
- LoadSDNode *Load = cast<LoadSDNode>(Store->getValue());
+ auto *Store = cast<StoreSDNode>(N);
+ auto *Load = cast<LoadSDNode>(Store->getValue());
// Prefer not to use MVC if either address can use ... RELATIVE LONG
// instructions.
bool SystemZDAGToDAGISel::storeLoadCanUseBlockBinary(SDNode *N,
unsigned I) const {
- StoreSDNode *StoreA = cast<StoreSDNode>(N);
- LoadSDNode *LoadA = cast<LoadSDNode>(StoreA->getValue().getOperand(1 - I));
- LoadSDNode *LoadB = cast<LoadSDNode>(StoreA->getValue().getOperand(I));
+ auto *StoreA = cast<StoreSDNode>(N);
+ auto *LoadA = cast<LoadSDNode>(StoreA->getValue().getOperand(1 - I));
+ auto *LoadB = cast<LoadSDNode>(StoreA->getValue().getOperand(I));
return !LoadA->isVolatile() && canUseBlockOperation(StoreA, LoadB);
}
if (Node->isMachineOpcode()) {
DEBUG(errs() << "== "; Node->dump(CurDAG); errs() << "\n");
Node->setNodeId(-1);
- return 0;
+ return nullptr;
}
unsigned Opcode = Node->getOpcode();
- SDNode *ResNode = 0;
+ SDNode *ResNode = nullptr;
switch (Opcode) {
case ISD::OR:
if (Node->getOperand(1).getOpcode() != ISD::Constant)
// If this is a 64-bit operation in which both 32-bit halves are nonzero,
// split the operation into two.
if (!ResNode && Node->getValueType(0) == MVT::i64)
- if (ConstantSDNode *Op1 = dyn_cast<ConstantSDNode>(Node->getOperand(1))) {
+ if (auto *Op1 = dyn_cast<ConstantSDNode>(Node->getOperand(1))) {
uint64_t Val = Op1->getZExtValue();
if (!SystemZ::isImmLF(Val) && !SystemZ::isImmHF(Val))
Node = splitLargeImmediate(Opcode, Node, Node->getOperand(0),
case ISD::ROTL:
case ISD::SHL:
case ISD::SRL:
+ case ISD::ZERO_EXTEND:
if (!ResNode)
ResNode = tryRISBGZero(Node);
break;
}
break;
- case ISD::ATOMIC_LOAD_SUB:
- // Try to convert subtractions of constants to additions.
- if (ConstantSDNode *Op2 = dyn_cast<ConstantSDNode>(Node->getOperand(2))) {
- uint64_t Value = -Op2->getZExtValue();
- EVT VT = Node->getValueType(0);
- if (VT == MVT::i32 || isInt<32>(Value)) {
- SDValue Ops[] = { Node->getOperand(0), Node->getOperand(1),
- CurDAG->getConstant(int32_t(Value), VT) };
- Node = CurDAG->MorphNodeTo(Node, ISD::ATOMIC_LOAD_ADD,
- Node->getVTList(), Ops, array_lengthof(Ops));
- }
- }
- break;
-
case SystemZISD::SELECT_CCMASK: {
SDValue Op0 = Node->getOperand(0);
SDValue Op1 = Node->getOperand(1);
ResNode = SelectCode(Node);
DEBUG(errs() << "=> ";
- if (ResNode == NULL || ResNode == Node)
+ if (ResNode == nullptr || ResNode == Node)
Node->dump(CurDAG);
else
ResNode->dump(CurDAG);
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