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Add support for flag operands

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23050 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-25 17:48:54 +00:00
parent 3cd82619a8
commit 376d54f9b6
1 changed files with 18 additions and 8 deletions
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26
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
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@ -76,14 +76,22 @@ unsigned SimpleSched::Emit(SDOperand Op) {
unsigned Opc = Op.getTargetOpcode();
const TargetInstrDescriptor &II = TII.get(Opc);
// Target nodes have any register or immediate operands before any chain
// nodes. Check that the DAG matches the TD files's expectation of #
// operands.
// The results of target nodes have register or immediate operands first,
// then an optional chain, and optional flag operands (which do not go into
// the machine instrs).
unsigned NumResults = Op.Val->getNumValues();
if (NumResults && Op.Val->getValueType(NumResults-1) == MVT::Other)
while (NumResults && Op.Val->getValueType(NumResults-1) == MVT::Flag)
--NumResults;
if (NumResults && Op.Val->getValueType(NumResults-1) == MVT::Other)
--NumResults; // Skip over chain result.
// The inputs to target nodes have any actual inputs first, followed by an
// optional chain operand, then flag operands. Compute the number of actual
// operands that will go into the machine instr.
unsigned NodeOperands = Op.getNumOperands();
while (NodeOperands &&
Op.getOperand(NodeOperands-1).getValueType() == MVT::Flag)
--NodeOperands;
if (NodeOperands && // Ignore chain if it exists.
Op.getOperand(NodeOperands-1).getValueType() == MVT::Other)
--NodeOperands;
@ -120,8 +128,9 @@ unsigned SimpleSched::Emit(SDOperand Op) {
// include it because it is the most common and it makes the logic
// simpler here.
unsigned R = Emit(Op.getOperand(i));
// Add an operand, unless this corresponds to a chain node.
if (Op.getOperand(i).getValueType() != MVT::Other)
// Add an operand, unless this corresponds to a chain or flag node.
MVT::ValueType VT = Op.getOperand(i).getValueType();
if (VT != MVT::Other && VT != MVT::Flag)
MI->addRegOperand(R, MachineOperand::Use);
} else if (ConstantSDNode *C =
dyn_cast<ConstantSDNode>(Op.getOperand(i))) {
@ -145,8 +154,9 @@ unsigned SimpleSched::Emit(SDOperand Op) {
MI->addExternalSymbolOperand(ES->getSymbol(), false);
} else {
unsigned R = Emit(Op.getOperand(i));
// Add an operand, unless this corresponds to a chain node.
if (Op.getOperand(i).getValueType() != MVT::Other)
// Add an operand, unless this corresponds to a chain or flag node.
MVT::ValueType VT = Op.getOperand(i).getValueType();
if (VT != MVT::Other && VT != MVT::Flag)
MI->addRegOperand(R, MachineOperand::Use);
}
}