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1 //===-- MipsSEISelLowering.h - MipsSE DAG Lowering Interface ----*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Subclass of MipsTargetLowering specialized for mips32/64.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef MipsSEISELLOWERING_H
15 #define MipsSEISELLOWERING_H
16
17 #include "MipsISelLowering.h"
18 #include "MipsRegisterInfo.h"
19
20 namespace llvm {
21   class MipsSETargetLowering : public MipsTargetLowering  {
22   public:
23     explicit MipsSETargetLowering(MipsTargetMachine &TM);
24
25     virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const;
26
27     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
28
29     virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
30
31     virtual MachineBasicBlock *
32     EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const;
33
34     virtual bool isShuffleMaskLegal(const SmallVectorImpl<int> &Mask,
35                                     EVT VT) const {
36       return false;
37     }
38
39     virtual const TargetRegisterClass *getRepRegClassFor(MVT VT) const {
40       if (VT == MVT::Untyped)
41         return Subtarget->hasDSP() ? &Mips::ACRegsDSPRegClass :
42                                      &Mips::ACRegsRegClass;
43
44       return TargetLowering::getRepRegClassFor(VT);
45     }
46
47   private:
48     virtual bool
49     isEligibleForTailCallOptimization(const MipsCC &MipsCCInfo,
50                                       unsigned NextStackOffset,
51                                       const MipsFunctionInfo& FI) const;
52
53     virtual void
54     getOpndList(SmallVectorImpl<SDValue> &Ops,
55                 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
56                 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
57                 CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const;
58
59     SDValue lowerMulDiv(SDValue Op, unsigned NewOpc, bool HasLo, bool HasHi,
60                         SelectionDAG &DAG) const;
61
62     SDValue lowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
63     SDValue lowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
64
65     MachineBasicBlock *emitBPOSGE32(MachineInstr *MI,
66                                     MachineBasicBlock *BB) const;
67   };
68 }
69
70 #endif // MipsSEISELLOWERING_H