MipsSEISelLowering.h revision 249259 
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 const TargetRegisterClass *getRepRegClassFor(MVT VT) const {
35      if (VT == MVT::Untyped)
36        return Subtarget->hasDSP() ? &Mips::ACRegsDSPRegClass :
37                                     &Mips::ACRegsRegClass;
38
39      return TargetLowering::getRepRegClassFor(VT);
40    }
41
42  private:
43    virtual bool
44    isEligibleForTailCallOptimization(const MipsCC &MipsCCInfo,
45                                      unsigned NextStackOffset,
46                                      const MipsFunctionInfo& FI) const;
47
48    virtual void
49    getOpndList(SmallVectorImpl<SDValue> &Ops,
50                std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
51                bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
52                CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const;
53
54    SDValue lowerMulDiv(SDValue Op, unsigned NewOpc, bool HasLo, bool HasHi,
55                        SelectionDAG &DAG) const;
56
57    MachineBasicBlock *emitBPOSGE32(MachineInstr *MI,
58                                    MachineBasicBlock *BB) const;
59  };
60}
61
62#endif // MipsSEISELLOWERING_H
63