return N;
}
-/// CountOperands - The inputs to target nodes have any actual inputs first,
+/// countOperands - The inputs to target nodes have any actual inputs first,
/// followed by an optional chain operand, then an optional glue operand.
/// Compute the number of actual operands that will go into the resulting
/// MachineInstr.
-unsigned InstrEmitter::CountOperands(SDNode *Node) {
+///
+/// Also count physreg RegisterSDNode and RegisterMaskSDNode operands preceding
+/// the chain and glue. These operands may be implicit on the machine instr.
+static unsigned countOperands(SDNode *Node, unsigned NumExpUses,
+ unsigned &NumImpUses) {
unsigned N = Node->getNumOperands();
while (N && Node->getOperand(N - 1).getValueType() == MVT::Glue)
--N;
if (N && Node->getOperand(N - 1).getValueType() == MVT::Other)
--N; // Ignore chain if it exists.
+
+ // Count RegisterSDNode and RegisterMaskSDNode operands for NumImpUses.
+ NumImpUses = N - NumExpUses;
+ for (unsigned I = N; I > NumExpUses; --I) {
+ if (isa<RegisterMaskSDNode>(Node->getOperand(I - 1)))
+ continue;
+ if (RegisterSDNode *RN = dyn_cast<RegisterSDNode>(Node->getOperand(I - 1)))
+ if (TargetRegisterInfo::isPhysicalRegister(RN->getReg()))
+ continue;
+ NumImpUses = N - I;
+ break;
+ }
+
return N;
}
/// AddOperand - Add the specified operand to the specified machine instr. II
/// specifies the instruction information for the node, and IIOpNum is the
-/// operand number (in the II) that we are adding. IIOpNum and II are used for
-/// assertions only.
+/// operand number (in the II) that we are adding.
void InstrEmitter::AddOperand(MachineInstr *MI, SDValue Op,
unsigned IIOpNum,
const MCInstrDesc *II,
const ConstantFP *CFP = F->getConstantFPValue();
MI->addOperand(MachineOperand::CreateFPImm(CFP));
} else if (RegisterSDNode *R = dyn_cast<RegisterSDNode>(Op)) {
- MI->addOperand(MachineOperand::CreateReg(R->getReg(), false));
+ // Turn additional physreg operands into implicit uses on non-variadic
+ // instructions. This is used by call and return instructions passing
+ // arguments in registers.
+ bool Imp = II && (IIOpNum >= II->getNumOperands() && !II->isVariadic());
+ MI->addOperand(MachineOperand::CreateReg(R->getReg(), false, Imp));
} else if (RegisterMaskSDNode *RM = dyn_cast<RegisterMaskSDNode>(Op)) {
MI->addOperand(MachineOperand::CreateRegMask(RM->getRegMask()));
} else if (GlobalAddressSDNode *TGA = dyn_cast<GlobalAddressSDNode>(Op)) {
} else if (BlockAddressSDNode *BA = dyn_cast<BlockAddressSDNode>(Op)) {
MI->addOperand(MachineOperand::CreateBA(BA->getBlockAddress(),
BA->getTargetFlags()));
+ } else if (TargetIndexSDNode *TI = dyn_cast<TargetIndexSDNode>(Op)) {
+ MI->addOperand(MachineOperand::CreateTargetIndex(TI->getIndex(),
+ TI->getOffset(),
+ TI->getTargetFlags()));
} else {
assert(Op.getValueType() != MVT::Other &&
Op.getValueType() != MVT::Glue &&
unsigned SrcReg, DstReg, DefSubIdx;
if (DefMI &&
TII->isCoalescableExtInstr(*DefMI, SrcReg, DstReg, DefSubIdx) &&
- SubIdx == DefSubIdx) {
+ SubIdx == DefSubIdx &&
+ TRC == MRI->getRegClass(SrcReg)) {
// Optimize these:
// r1025 = s/zext r1024, 4
// r1026 = extract_subreg r1025, 4
const MCInstrDesc &II = TII->get(Opc);
unsigned NumResults = CountResults(Node);
- unsigned NodeOperands = CountOperands(Node);
+ unsigned NumImpUses = 0;
+ unsigned NodeOperands =
+ countOperands(Node, II.getNumOperands() - II.getNumDefs(), NumImpUses);
bool HasPhysRegOuts = NumResults > II.getNumDefs() && II.getImplicitDefs()!=0;
#ifndef NDEBUG
unsigned NumMIOperands = NodeOperands + NumResults;
"Too few operands for a variadic node!");
else
assert(NumMIOperands >= II.getNumOperands() &&
- NumMIOperands <= II.getNumOperands()+II.getNumImplicitDefs() &&
+ NumMIOperands <= II.getNumOperands() + II.getNumImplicitDefs() +
+ NumImpUses &&
"#operands for dag node doesn't match .td file!");
#endif