MipsSEISelLowering.h revision 491d04969d9f29ed891c73238648853954ba4f81 
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
20namespace 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::ACC64DSPRegClass :
42                                     &Mips::ACC64RegClass;
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
71