diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp | 55 |
1 files changed, 49 insertions, 6 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp b/contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp index c6045fe..37fc784 100644 --- a/contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp +++ b/contrib/llvm/lib/Target/Mips/MipsISelLowering.cpp @@ -619,6 +619,33 @@ static SDValue performSELECTCombine(SDNode *N, SelectionDAG &DAG, return SDValue(); } +static SDValue performCMovFPCombine(SDNode *N, SelectionDAG &DAG, + TargetLowering::DAGCombinerInfo &DCI, + const MipsSubtarget &Subtarget) { + if (DCI.isBeforeLegalizeOps()) + return SDValue(); + + SDValue ValueIfTrue = N->getOperand(0), ValueIfFalse = N->getOperand(2); + + ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(ValueIfFalse); + if (!FalseC || FalseC->getZExtValue()) + return SDValue(); + + // Since RHS (False) is 0, we swap the order of the True/False operands + // (obviously also inverting the condition) so that we can + // take advantage of conditional moves using the $0 register. + // Example: + // return (a != 0) ? x : 0; + // load $reg, x + // movz $reg, $0, a + unsigned Opc = (N->getOpcode() == MipsISD::CMovFP_T) ? MipsISD::CMovFP_F : + MipsISD::CMovFP_T; + + SDValue FCC = N->getOperand(1), Glue = N->getOperand(3); + return DAG.getNode(Opc, SDLoc(N), ValueIfFalse.getValueType(), + ValueIfFalse, FCC, ValueIfTrue, Glue); +} + static SDValue performANDCombine(SDNode *N, SelectionDAG &DAG, TargetLowering::DAGCombinerInfo &DCI, const MipsSubtarget &Subtarget) { @@ -752,6 +779,9 @@ SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) return performDivRemCombine(N, DAG, DCI, Subtarget); case ISD::SELECT: return performSELECTCombine(N, DAG, DCI, Subtarget); + case MipsISD::CMovFP_F: + case MipsISD::CMovFP_T: + return performCMovFPCombine(N, DAG, DCI, Subtarget); case ISD::AND: return performANDCombine(N, DAG, DCI, Subtarget); case ISD::OR: @@ -2039,7 +2069,7 @@ SDValue MipsTargetLowering::lowerShiftLeftParts(SDValue Op, SDValue Or = DAG.getNode(ISD::OR, DL, VT, ShiftLeftHi, ShiftRightLo); SDValue ShiftLeftLo = DAG.getNode(ISD::SHL, DL, VT, Lo, Shamt); SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt, - DAG.getConstant(0x20, MVT::i32)); + DAG.getConstant(VT.getSizeInBits(), MVT::i32)); Lo = DAG.getNode(ISD::SELECT, DL, VT, Cond, DAG.getConstant(0, VT), ShiftLeftLo); Hi = DAG.getNode(ISD::SELECT, DL, VT, Cond, ShiftLeftLo, Or); @@ -2078,11 +2108,12 @@ SDValue MipsTargetLowering::lowerShiftRightParts(SDValue Op, SelectionDAG &DAG, SDValue ShiftRightHi = DAG.getNode(IsSRA ? ISD::SRA : ISD::SRL, DL, VT, Hi, Shamt); SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt, - DAG.getConstant(0x20, MVT::i32)); - SDValue Shift31 = DAG.getNode(ISD::SRA, DL, VT, Hi, DAG.getConstant(31, VT)); + DAG.getConstant(VT.getSizeInBits(), MVT::i32)); + SDValue Ext = DAG.getNode(ISD::SRA, DL, VT, Hi, + DAG.getConstant(VT.getSizeInBits() - 1, VT)); Lo = DAG.getNode(ISD::SELECT, DL, VT, Cond, ShiftRightHi, Or); Hi = DAG.getNode(ISD::SELECT, DL, VT, Cond, - IsSRA ? Shift31 : DAG.getConstant(0, VT), ShiftRightHi); + IsSRA ? Ext : DAG.getConstant(0, VT), ShiftRightHi); SDValue Ops[2] = {Lo, Hi}; return DAG.getMergeValues(Ops, DL); @@ -2902,13 +2933,16 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain, for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { CCValAssign &VA = ArgLocs[i]; - std::advance(FuncArg, Ins[i].OrigArgIndex - CurArgIdx); - CurArgIdx = Ins[i].OrigArgIndex; + if (Ins[i].isOrigArg()) { + std::advance(FuncArg, Ins[i].getOrigArgIndex() - CurArgIdx); + CurArgIdx = Ins[i].getOrigArgIndex(); + } EVT ValVT = VA.getValVT(); ISD::ArgFlagsTy Flags = Ins[i].Flags; bool IsRegLoc = VA.isRegLoc(); if (Flags.isByVal()) { + assert(Ins[i].isOrigArg() && "Byval arguments cannot be implicit"); unsigned FirstByValReg, LastByValReg; unsigned ByValIdx = CCInfo.getInRegsParamsProcessed(); CCInfo.getInRegsParamInfo(ByValIdx, FirstByValReg, LastByValReg); @@ -3029,6 +3063,15 @@ MipsTargetLowering::CanLowerReturn(CallingConv::ID CallConv, return CCInfo.CheckReturn(Outs, RetCC_Mips); } +bool +MipsTargetLowering::shouldSignExtendTypeInLibCall(EVT Type, bool IsSigned) const { + if (Subtarget.hasMips3() && Subtarget.abiUsesSoftFloat()) { + if (Type == MVT::i32) + return true; + } + return IsSigned; +} + SDValue MipsTargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool IsVarArg, |
