1 //===-- SystemZRegisterInfo.h - SystemZ register information ----*- 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 #ifndef SystemZREGISTERINFO_H
11 #define SystemZREGISTERINFO_H
12 
13 #include "SystemZ.h"
14 #include "llvm/Target/TargetRegisterInfo.h"
15 
16 #define GET_REGINFO_HEADER
17 #include "SystemZGenRegisterInfo.inc"
18 
19 namespace llvm {
20 
21 namespace SystemZ {
22   // Return the subreg to use for referring to the even and odd registers
23   // in a GR128 pair.  Is32Bit says whether we want a GR32 or GR64.
even128(bool Is32bit)24   inline unsigned even128(bool Is32bit) {
25     return Is32bit ? subreg_hl32 : subreg_h64;
26   }
odd128(bool Is32bit)27   inline unsigned odd128(bool Is32bit) {
28     return Is32bit ? subreg_l32 : subreg_l64;
29   }
30 }
31 
32 class SystemZSubtarget;
33 class SystemZInstrInfo;
34 
35 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
36 private:
37   SystemZTargetMachine &TM;
38 
39 public:
40   SystemZRegisterInfo(SystemZTargetMachine &tm);
41 
42   // Override TargetRegisterInfo.h.
requiresRegisterScavengingSystemZRegisterInfo43   virtual bool requiresRegisterScavenging(const MachineFunction &MF) const
44     LLVM_OVERRIDE {
45     return true;
46   }
requiresFrameIndexScavengingSystemZRegisterInfo47   virtual bool requiresFrameIndexScavenging(const MachineFunction &MF) const
48     LLVM_OVERRIDE {
49     return true;
50   }
trackLivenessAfterRegAllocSystemZRegisterInfo51   virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const
52     LLVM_OVERRIDE {
53     return true;
54   }
55   virtual const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0)
56     const LLVM_OVERRIDE;
57   virtual BitVector getReservedRegs(const MachineFunction &MF)
58     const LLVM_OVERRIDE;
59   virtual void eliminateFrameIndex(MachineBasicBlock::iterator MI,
60                                    int SPAdj, unsigned FIOperandNum,
61                                    RegScavenger *RS) const LLVM_OVERRIDE;
62   virtual unsigned getFrameRegister(const MachineFunction &MF) const
63     LLVM_OVERRIDE;
64 };
65 
66 } // end namespace llvm
67 
68 #endif
69