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Custom lower SIGN_EXTEND

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70763 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-05-03 13:17:49 +00:00
parent 1394db0eeb
commit b78e214274
2 changed files with 16 additions and 0 deletions
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15
lib/Target/MSP430/MSP430ISelLowering.cpp
View File

@ -85,6 +85,7 @@ MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) :
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
setOperationAction(ISD::SELECT, MVT::i8, Custom);
setOperationAction(ISD::SELECT, MVT::i16, Custom);
setOperationAction(ISD::SIGN_EXTEND, MVT::i16, Custom);
// FIXME: Implement efficiently multiplication by a constant
setOperationAction(ISD::MUL, MVT::i16, Expand);
@ -107,6 +108,7 @@ SDValue MSP430TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
case ISD::SETCC: return LowerSETCC(Op, DAG);
case ISD::BRCOND: return LowerBRCOND(Op, DAG);
case ISD::SELECT: return LowerSELECT(Op, DAG);
case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, DAG);
default:
assert(0 && "unimplemented operand");
return SDValue();
@ -592,6 +594,19 @@ SDValue MSP430TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) {
return DAG.getNode(MSP430ISD::SELECT, dl, VTs, &Ops[0], Ops.size());
}
SDValue MSP430TargetLowering::LowerSIGN_EXTEND(SDValue Op,
SelectionDAG &DAG) {
SDValue Val = Op.getOperand(0);
MVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc();
assert(VT == MVT::i16 && "Only support i16 for now!");
return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, VT,
DAG.getNode(ISD::ANY_EXTEND, dl, VT, Val),
DAG.getValueType(Val.getValueType()));
}
const char *MSP430TargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default: return NULL;

1
lib/Target/MSP430/MSP430ISelLowering.h
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@ -86,6 +86,7 @@ namespace llvm {
SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG);
SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG);
SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG);
SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG);
SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG,
unsigned CC);