1 //===-- SIRegisterInfo.cpp - SI Register Information ---------------------===//
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 //===----------------------------------------------------------------------===//
11 /// \brief SI implementation of the TargetRegisterInfo class.
13 //===----------------------------------------------------------------------===//
16 #include "SIRegisterInfo.h"
17 #include "AMDGPUTargetMachine.h"
21 SIRegisterInfo::SIRegisterInfo(AMDGPUTargetMachine &tm)
22 : AMDGPURegisterInfo(tm),
26 BitVector SIRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
27 BitVector Reserved(getNumRegs());
28 Reserved.set(AMDGPU::EXEC);
32 unsigned SIRegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
33 MachineFunction &MF) const {
34 return RC->getNumRegs();
37 const TargetRegisterClass *
38 SIRegisterInfo::getISARegClass(const TargetRegisterClass * rc) const {
39 switch (rc->getID()) {
40 case AMDGPU::GPRF32RegClassID:
41 return &AMDGPU::VReg_32RegClass;
46 const TargetRegisterClass * SIRegisterInfo::getCFGStructurizerRegClass(
50 case MVT::i32: return &AMDGPU::VReg_32RegClass;
54 const TargetRegisterClass *SIRegisterInfo::getPhysRegClass(unsigned Reg) const {
55 assert(!TargetRegisterInfo::isVirtualRegister(Reg));
57 const TargetRegisterClass *BaseClasses[] = {
58 &AMDGPU::VReg_32RegClass,
59 &AMDGPU::SReg_32RegClass,
60 &AMDGPU::VReg_64RegClass,
61 &AMDGPU::SReg_64RegClass,
62 &AMDGPU::SReg_128RegClass,
63 &AMDGPU::SReg_256RegClass
66 for (unsigned i = 0, e = sizeof(BaseClasses) /
67 sizeof(const TargetRegisterClass*); i != e; ++i) {
68 if (BaseClasses[i]->contains(Reg)) {
69 return BaseClasses[i];
75 bool SIRegisterInfo::isSGPRClass(const TargetRegisterClass *RC) const {
82 bool SIRegisterInfo::hasVGPRs(const TargetRegisterClass *RC) const {
83 return getCommonSubClass(&AMDGPU::VReg_32RegClass, RC) ||
84 getCommonSubClass(&AMDGPU::VReg_64RegClass, RC) ||
85 getCommonSubClass(&AMDGPU::VReg_128RegClass, RC) ||
86 getCommonSubClass(&AMDGPU::VReg_256RegClass, RC) ||
87 getCommonSubClass(&AMDGPU::VReg_512RegClass, RC);
90 const TargetRegisterClass *SIRegisterInfo::getEquivalentVGPRClass(
91 const TargetRegisterClass *SRC) const {
94 } else if (getCommonSubClass(SRC, &AMDGPU::SGPR_32RegClass)) {
95 return &AMDGPU::VReg_32RegClass;
96 } else if (getCommonSubClass(SRC, &AMDGPU::SGPR_64RegClass)) {
97 return &AMDGPU::VReg_64RegClass;
98 } else if (getCommonSubClass(SRC, &AMDGPU::SReg_128RegClass)) {
99 return &AMDGPU::VReg_128RegClass;
100 } else if (getCommonSubClass(SRC, &AMDGPU::SReg_256RegClass)) {
101 return &AMDGPU::VReg_256RegClass;
102 } else if (getCommonSubClass(SRC, &AMDGPU::SReg_512RegClass)) {
103 return &AMDGPU::VReg_512RegClass;
108 const TargetRegisterClass *SIRegisterInfo::getSubRegClass(
109 const TargetRegisterClass *RC, unsigned SubIdx) const {
110 if (SubIdx == AMDGPU::NoSubRegister)
113 // If this register has a sub-register, we can safely assume it is a 32-bit
114 // register, becuase all of SI's sub-registers are 32-bit.
115 if (isSGPRClass(RC)) {
116 return &AMDGPU::SGPR_32RegClass;
118 return &AMDGPU::VGPR_32RegClass;