SparcRegisterInfo.cpp revision d5b03f252c0db6b49a242abab63d7c5a260fceae
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com//===- SparcRegisterInfo.cpp - SPARC Register Information -------*- C++ -*-===// 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// The LLVM Compiler Infrastructure 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// This file is distributed under the University of Illinois Open Source 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// License. See LICENSE.TXT for details. 7ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 8a5572e5bb2a2bbeeb59de0741c2527869d365a0ccommit-bot@chromium.org//===----------------------------------------------------------------------===// 9a5572e5bb2a2bbeeb59de0741c2527869d365a0ccommit-bot@chromium.org// 10a5572e5bb2a2bbeeb59de0741c2527869d365a0ccommit-bot@chromium.org// This file contains the SPARC implementation of the TargetRegisterInfo class. 11a5572e5bb2a2bbeeb59de0741c2527869d365a0ccommit-bot@chromium.org// 12d3ae77965e94e0efda496f5461cbec4533cb5b16vandebo@chromium.org//===----------------------------------------------------------------------===// 138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 148b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "Sparc.h" 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SparcRegisterInfo.h" 16f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#include "SparcSubtarget.h" 17f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#include "llvm/CodeGen/MachineInstrBuilder.h" 18a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com#include "llvm/CodeGen/MachineFunction.h" 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/CodeGen/MachineFrameInfo.h" 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/CodeGen/MachineLocation.h" 218b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "llvm/Support/ErrorHandling.h" 22f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#include "llvm/Target/TargetInstrInfo.h" 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/Type.h" 24f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#include "llvm/ADT/BitVector.h" 25f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#include "llvm/ADT/STLExtras.h" 26f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define GET_REGINFO_MC_DESC 28f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com#define GET_REGINFO_TARGET_DESC 29a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com#include "SparcGenRegisterInfo.inc" 308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comusing namespace llvm; 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 33a641f3f18e5319773989812a888f3fad49e4f2adreed@google.comSparcRegisterInfo::SparcRegisterInfo(SparcSubtarget &st, 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const TargetInstrInfo &tii) 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com : SparcGenRegisterInfo(), Subtarget(st), TII(tii) { 368b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org} 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 38f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.comconst unsigned* SparcRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) 39f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com const { 40f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com static const unsigned CalleeSavedRegs[] = { 0 }; 41f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com return CalleeSavedRegs; 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comBitVector SparcRegisterInfo::getReservedRegs(const MachineFunction &MF) const { 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com BitVector Reserved(getNumRegs()); 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // FIXME: G1 reserved for now for large imm generation by frame code. 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::G1); 48a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com Reserved.set(SP::G2); 49a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com Reserved.set(SP::G3); 508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::G4); 518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::O6); 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::I6); 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::I7); 54f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com Reserved.set(SP::G0); 55f94b3a4cebd4adab09c40ebe23c02a615e10c394bsalomon@google.com Reserved.set(SP::G5); 568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::G6); 578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Reserved.set(SP::G7); 588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return Reserved; 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 60a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SparcRegisterInfo:: 628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comeliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MachineBasicBlock::iterator I) const { 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MachineInstr &MI = *I; 658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com DebugLoc dl = MI.getDebugLoc(); 66a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com int Size = MI.getOperand(0).getImm(); 67a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com if (MI.getOpcode() == SP::ADJCALLSTACKDOWN) 68a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com Size = -Size; 69a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com if (Size) 70a641f3f18e5319773989812a888f3fad49e4f2adreed@google.com BuildMI(MBB, I, dl, TII.get(SP::ADDri), SP::O6).addReg(SP::O6).addImm(Size); 713bafe74a29c37761082980ed4ee9b831256bd27ereed@google.com MBB.erase(I); 723bafe74a29c37761082980ed4ee9b831256bd27ereed@google.com} 733bafe74a29c37761082980ed4ee9b831256bd27ereed@google.com 743bafe74a29c37761082980ed4ee9b831256bd27ereed@google.comvoid 758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comSparcRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, 768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int SPAdj, RegScavenger *RS) const { 778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com assert(SPAdj == 0 && "Unexpected"); 788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com unsigned i = 0; 808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MachineInstr &MI = *II; 818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com DebugLoc dl = MI.getDebugLoc(); 828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com while (!MI.getOperand(i).isFI()) { 830c00f21fee3f5cfa3aa7e5d46ff94cb8cf340451tomhudson@google.com ++i; 848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!"); 858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 877c2f27d788fff9dbf66a6d52753e47f786a313c0reed@google.com int FrameIndex = MI.getOperand(i).getIndex(); 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // Addressable stack objects are accessed using neg. offsets from %fp 908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MachineFunction &MF = *MI.getParent()->getParent(); 918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) + 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MI.getOperand(i+1).getImm(); 938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // Replace frame index with a frame pointer reference. 958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (Offset >= -4096 && Offset <= 4095) { 968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // If the offset is small enough to fit in the immediate field, directly 978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // encode it. 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MI.getOperand(i).ChangeToRegister(SP::I6, false); 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MI.getOperand(i+1).ChangeToImmediate(Offset); 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } else { 1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // Otherwise, emit a G1 = SETHI %hi(offset). FIXME: it would be better to 1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // scavenge a register here instead of reserving G1 all of the time. 1038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com unsigned OffHi = (unsigned)Offset >> 10U; 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com BuildMI(*MI.getParent(), II, dl, TII.get(SP::SETHIi), SP::G1).addImm(OffHi); 1058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // Emit G1 = G1 + I6 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com BuildMI(*MI.getParent(), II, dl, TII.get(SP::ADDrr), SP::G1).addReg(SP::G1) 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com .addReg(SP::I6); 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // Insert: G1+%lo(offset) into the user. 1098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MI.getOperand(i).ChangeToRegister(SP::G1, false); 1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MI.getOperand(i+1).ChangeToImmediate(Offset & ((1 << 10)-1)); 1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SparcRegisterInfo:: 1158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprocessFunctionBeforeFrameFinalized(MachineFunction &MF) const {} 1168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comunsigned SparcRegisterInfo::getRARegister() const { 1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return SP::I7; 1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comunsigned SparcRegisterInfo::getFrameRegister(const MachineFunction &MF) const { 1228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return SP::I6; 1238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comunsigned SparcRegisterInfo::getEHExceptionRegister() const { 1268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com llvm_unreachable("What is the exception register"); 1278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return 0; 1288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comunsigned SparcRegisterInfo::getEHHandlerRegister() const { 1318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com llvm_unreachable("What is the exception handler register"); 1328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return 0; 1338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comint SparcRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const { 1368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return SparcGenRegisterInfo::getDwarfRegNumFull(RegNum, 0); 1378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comint SparcRegisterInfo::getLLVMRegNum(unsigned DwarfRegNo, bool isEH) const { 1408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return SparcGenRegisterInfo::getLLVMRegNumFull(DwarfRegNo,0); 1418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com