1 //===- PPCRegisterInfo.h - PowerPC Register Information Impl -----*- 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 // This file contains the PowerPC implementation of the TargetRegisterInfo
11 // class.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef POWERPC32_REGISTERINFO_H
16 #define POWERPC32_REGISTERINFO_H
17 
18 #include "PPC.h"
19 #include <map>
20 
21 #define GET_REGINFO_HEADER
22 #include "PPCGenRegisterInfo.inc"
23 
24 namespace llvm {
25 class PPCSubtarget;
26 class TargetInstrInfo;
27 class Type;
28 
29 class PPCRegisterInfo : public PPCGenRegisterInfo {
30   std::map<unsigned, unsigned> ImmToIdxMap;
31   const PPCSubtarget &Subtarget;
32   const TargetInstrInfo &TII;
33 public:
34   PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
35 
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;
39 
40   unsigned getRegPressureLimit(const TargetRegisterClass *RC,
41                                MachineFunction &MF) const;
42 
43   /// Code Generation virtual methods...
44   const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
45 
46   BitVector getReservedRegs(const MachineFunction &MF) const;
47 
48   /// requiresRegisterScavenging - We require a register scavenger.
49   /// FIXME (64-bit): Should be inlined.
50   bool requiresRegisterScavenging(const MachineFunction &MF) const;
51 
52   void eliminateCallFramePseudoInstr(MachineFunction &MF,
53                                      MachineBasicBlock &MBB,
54                                      MachineBasicBlock::iterator I) const;
55 
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;
64 
65   // Debug information queries.
66   unsigned getFrameRegister(const MachineFunction &MF) const;
67 
68   // Exception handling queries.
69   unsigned getEHExceptionRegister() const;
70   unsigned getEHHandlerRegister() const;
71 };
72 
73 } // end namespace llvm
74 
75 #endif
76