1 //===-- PPCRegisterInfo.h - PowerPC Register Information Impl ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the PowerPC implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef POWERPC32_REGISTERINFO_H
16 #define POWERPC32_REGISTERINFO_H
21 #define GET_REGINFO_HEADER
22 #include "PPCGenRegisterInfo.inc"
26 class TargetInstrInfo;
29 class PPCRegisterInfo : public PPCGenRegisterInfo {
30 std::map<unsigned, unsigned> ImmToIdxMap;
31 const PPCSubtarget &Subtarget;
32 const TargetInstrInfo &TII;
33 mutable int CRSpillFrameIdx;
35 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
37 /// getPointerRegClass - Return the register class to use to hold pointers.
38 /// This is used for addressing modes.
39 virtual const TargetRegisterClass *
40 getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const;
42 unsigned getRegPressureLimit(const TargetRegisterClass *RC,
43 MachineFunction &MF) const;
45 /// Code Generation virtual methods...
46 const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
47 const uint32_t *getCallPreservedMask(CallingConv::ID CC) const;
49 BitVector getReservedRegs(const MachineFunction &MF) const;
51 virtual bool avoidWriteAfterWrite(const TargetRegisterClass *RC) const;
53 /// requiresRegisterScavenging - We require a register scavenger.
54 /// FIXME (64-bit): Should be inlined.
55 bool requiresRegisterScavenging(const MachineFunction &MF) const;
57 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const;
59 void eliminateCallFramePseudoInstr(MachineFunction &MF,
60 MachineBasicBlock &MBB,
61 MachineBasicBlock::iterator I) const;
63 void lowerDynamicAlloc(MachineBasicBlock::iterator II,
64 int SPAdj, RegScavenger *RS) const;
65 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
66 int SPAdj, RegScavenger *RS) const;
67 void lowerCRRestore(MachineBasicBlock::iterator II, unsigned FrameIndex,
68 int SPAdj, RegScavenger *RS) const;
69 bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
71 void eliminateFrameIndex(MachineBasicBlock::iterator II,
72 int SPAdj, unsigned FIOperandNum,
73 RegScavenger *RS = NULL) const;
75 // Debug information queries.
76 unsigned getFrameRegister(const MachineFunction &MF) const;
78 // Exception handling queries.
79 unsigned getEHExceptionRegister() const;
80 unsigned getEHHandlerRegister() const;
83 } // end namespace llvm