LLVM  4.0.0
SystemZRegisterInfo.h
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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"
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.
24 inline unsigned even128(bool Is32bit) {
25  return Is32bit ? subreg_hl32 : subreg_h64;
26 }
27 inline unsigned odd128(bool Is32bit) {
28  return Is32bit ? subreg_l32 : subreg_l64;
29 }
30 } // end namespace SystemZ
31 
33 public:
35 
36  /// getPointerRegClass - Return the register class to use to hold pointers.
37  /// This is currently only used by LOAD_STACK_GUARD, which requires a non-%r0
38  /// register, hence ADDR64.
39  const TargetRegisterClass *
41  unsigned Kind=0) const override {
42  return &SystemZ::ADDR64BitRegClass;
43  }
44 
45  // Override TargetRegisterInfo.h.
46  bool requiresRegisterScavenging(const MachineFunction &MF) const override {
47  return true;
48  }
49  bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
50  return true;
51  }
52  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
53  return true;
54  }
55  const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
57  CallingConv::ID CC) const override;
58  BitVector getReservedRegs(const MachineFunction &MF) const override;
60  int SPAdj, unsigned FIOperandNum,
61  RegScavenger *RS) const override;
62  unsigned getFrameRegister(const MachineFunction &MF) const override;
63 };
64 
65 } // end namespace llvm
66 
67 #endif
BitVector getReservedRegs(const MachineFunction &MF) const override
unsigned odd128(bool Is32bit)
uint16_t MCPhysReg
An unsigned integer type large enough to represent all physical registers, but not necessarily virtua...
void eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj, unsigned FIOperandNum, RegScavenger *RS) const override
unsigned getFrameRegister(const MachineFunction &MF) const override
const uint32_t * getCallPreservedMask(const MachineFunction &MF, CallingConv::ID CC) const override
bool requiresFrameIndexScavenging(const MachineFunction &MF) const override
const MCPhysReg * getCalleeSavedRegs(const MachineFunction *MF) const override
bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override
const TargetRegisterClass * getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const override
getPointerRegClass - Return the register class to use to hold pointers.
bool requiresRegisterScavenging(const MachineFunction &MF) const override
const unsigned Kind
unsigned even128(bool Is32bit)
IRTranslator LLVM IR MI