[mips] Move the code which does dag-combine for multiply-add/sub nodes to
[oota-llvm.git] / lib / Target / Mips / MipsSEISelLowering.h
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 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