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;
34 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
36 /// getPointerRegClass - Return the register class to use to hold pointers.
37 /// This is used for addressing modes.
38 virtual const TargetRegisterClass *getPointerRegClass(unsigned Kind=0) const;
40 unsigned getRegPressureLimit(const TargetRegisterClass *RC,
41 MachineFunction &MF) const;
43 /// Code Generation virtual methods...
44 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
46 BitVector getReservedRegs(const MachineFunction &MF) const;
48 /// requiresRegisterScavenging - We require a register scavenger.
49 /// FIXME (64-bit): Should be inlined.
50 bool requiresRegisterScavenging(const MachineFunction &MF) const;
52 void eliminateCallFramePseudoInstr(MachineFunction &MF,
53 MachineBasicBlock &MBB,
54 MachineBasicBlock::iterator I) const;
56 void lowerDynamicAlloc(MachineBasicBlock::iterator II,
57 int SPAdj, RegScavenger *RS) const;
58 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
59 int SPAdj, RegScavenger *RS) const;
60 void lowerCRRestore(MachineBasicBlock::iterator II, unsigned FrameIndex,
61 int SPAdj, RegScavenger *RS) const;
62 void eliminateFrameIndex(MachineBasicBlock::iterator II,
63 int SPAdj, RegScavenger *RS = NULL) const;
65 // Debug information queries.
66 unsigned getFrameRegister(const MachineFunction &MF) const;
68 // Exception handling queries.
69 unsigned getEHExceptionRegister() const;
70 unsigned getEHHandlerRegister() const;
73 } // end namespace llvm