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 LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZREGISTERINFO_H
11 #define LLVM_LIB_TARGET_SYSTEMZ_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 } // end namespace SystemZ
31 
32 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
33 public:
34   SystemZRegisterInfo();
35 
36   // Override TargetRegisterInfo.h.
requiresRegisterScavengingSystemZRegisterInfo37   bool requiresRegisterScavenging(const MachineFunction &MF) const override {
38     return true;
39   }
requiresFrameIndexScavengingSystemZRegisterInfo40   bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
41     return true;
42   }
trackLivenessAfterRegAllocSystemZRegisterInfo43   bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
44     return true;
45   }
46   const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
47   const uint32_t *getCallPreservedMask(const MachineFunction &MF,
48                                        CallingConv::ID CC) const override;
49   BitVector getReservedRegs(const MachineFunction &MF) const override;
50   void eliminateFrameIndex(MachineBasicBlock::iterator MI,
51                            int SPAdj, unsigned FIOperandNum,
52                            RegScavenger *RS) const override;
53   unsigned getFrameRegister(const MachineFunction &MF) const override;
54 };
55 
56 } // end namespace llvm
57 
58 #endif
59