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Lower SETCC nodes during legalization. Previously, it was lowered in DAG combine pass.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152450 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-03-09 23:46:03 +00:00
parent 9ab3dbe617
commit 0a40c2353c
2 changed files with 16 additions and 20 deletions
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35
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -142,6 +142,8 @@ MipsTargetLowering(MipsTargetMachine &TM)
setOperationAction(ISD::SELECT, MVT::f32, Custom);
setOperationAction(ISD::SELECT, MVT::f64, Custom);
setOperationAction(ISD::SELECT, MVT::i32, Custom);
setOperationAction(ISD::SETCC, MVT::f32, Custom);
setOperationAction(ISD::SETCC, MVT::f64, Custom);
setOperationAction(ISD::BRCOND, MVT::Other, Custom);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Custom);
@ -246,7 +248,6 @@ MipsTargetLowering(MipsTargetMachine &TM)
setTargetDAGCombine(ISD::SUBE);
setTargetDAGCombine(ISD::SDIVREM);
setTargetDAGCombine(ISD::UDIVREM);
setTargetDAGCombine(ISD::SETCC);
setTargetDAGCombine(ISD::SELECT);
setTargetDAGCombine(ISD::AND);
setTargetDAGCombine(ISD::OR);
@ -560,23 +561,6 @@ static SDValue CreateCMovFP(SelectionDAG& DAG, SDValue Cond, SDValue True,
True.getValueType(), True, False, Cond);
}
static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG& DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget* Subtarget) {
if (DCI.isBeforeLegalizeOps())
return SDValue();
SDValue Cond = CreateFPCmp(DAG, SDValue(N, 0));
if (Cond.getOpcode() != MipsISD::FPCmp)
return SDValue();
SDValue True = DAG.getConstant(1, MVT::i32);
SDValue False = DAG.getConstant(0, MVT::i32);
return CreateCMovFP(DAG, Cond, True, False, N->getDebugLoc());
}
static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG& DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget* Subtarget) {
@ -718,8 +702,6 @@ SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
case ISD::SDIVREM:
case ISD::UDIVREM:
return PerformDivRemCombine(N, DAG, DCI, Subtarget);
case ISD::SETCC:
return PerformSETCCCombine(N, DAG, DCI, Subtarget);
case ISD::SELECT:
return PerformSELECTCombine(N, DAG, DCI, Subtarget);
case ISD::AND:
@ -744,6 +726,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const
case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
case ISD::SELECT: return LowerSELECT(Op, DAG);
case ISD::SETCC: return LowerSETCC(Op, DAG);
case ISD::VASTART: return LowerVASTART(Op, DAG);
case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
@ -1511,6 +1494,18 @@ LowerSELECT(SDValue Op, SelectionDAG &DAG) const
Op.getDebugLoc());
}
SDValue MipsTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
SDValue Cond = CreateFPCmp(DAG, Op);
assert(Cond.getOpcode() == MipsISD::FPCmp &&
"Floating point operand expected.");
SDValue True = DAG.getConstant(1, MVT::i32);
SDValue False = DAG.getConstant(0, MVT::i32);
return CreateCMovFP(DAG, Cond, True, False, Op.getDebugLoc());
}
SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) const {
// FIXME there isn't actually debug info here

1
lib/Target/Mips/MipsISelLowering.h
View File

@ -128,6 +128,7 @@ namespace llvm {
SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;