#include "Alpha.h"
#include "AlphaInstrInfo.h"
+#include "AlphaMachineFunctionInfo.h"
#include "AlphaGenInstrInfo.inc"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
AlphaInstrInfo::AlphaInstrInfo()
bool AlphaInstrInfo::isMoveInstr(const MachineInstr& MI,
- unsigned& sourceReg,
- unsigned& destReg) const {
- MachineOpCode oc = MI.getOpcode();
+ unsigned& sourceReg, unsigned& destReg,
+ unsigned& SrcSR, unsigned& DstSR) const {
+ unsigned oc = MI.getOpcode();
if (oc == Alpha::BISr ||
oc == Alpha::CPYSS ||
oc == Alpha::CPYST ||
// or r1, r2, r2
// cpys(s|t) r1 r2 r2
assert(MI.getNumOperands() >= 3 &&
- MI.getOperand(0).isRegister() &&
- MI.getOperand(1).isRegister() &&
- MI.getOperand(2).isRegister() &&
+ MI.getOperand(0).isReg() &&
+ MI.getOperand(1).isReg() &&
+ MI.getOperand(2).isReg() &&
"invalid Alpha BIS instruction!");
if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
sourceReg = MI.getOperand(1).getReg();
destReg = MI.getOperand(0).getReg();
+ SrcSR = DstSR = 0;
return true;
}
}
}
unsigned
-AlphaInstrInfo::isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const {
+AlphaInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
switch (MI->getOpcode()) {
case Alpha::LDL:
case Alpha::LDQ:
case Alpha::LDWU:
case Alpha::LDS:
case Alpha::LDT:
- if (MI->getOperand(1).isFrameIndex()) {
+ if (MI->getOperand(1).isFI()) {
FrameIndex = MI->getOperand(1).getIndex();
return MI->getOperand(0).getReg();
}
}
unsigned
-AlphaInstrInfo::isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const {
+AlphaInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
+ int &FrameIndex) const {
switch (MI->getOpcode()) {
case Alpha::STL:
case Alpha::STQ:
case Alpha::STW:
case Alpha::STS:
case Alpha::STT:
- if (MI->getOperand(1).isFrameIndex()) {
+ if (MI->getOperand(1).isFI()) {
FrameIndex = MI->getOperand(1).getIndex();
return MI->getOperand(0).getReg();
}
}
}
-unsigned AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
- MachineBasicBlock *FBB,
- const std::vector<MachineOperand> &Cond)const{
+unsigned AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,
+ MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const SmallVectorImpl<MachineOperand> &Cond) const {
+ // FIXME this should probably have a DebugLoc argument
+ DebugLoc dl = DebugLoc::getUnknownLoc();
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
assert((Cond.size() == 2 || Cond.size() == 0) &&
"Alpha branch conditions have two components!");
// One-way branch.
if (FBB == 0) {
if (Cond.empty()) // Unconditional branch
- BuildMI(&MBB, get(Alpha::BR)).addMBB(TBB);
+ BuildMI(&MBB, dl, get(Alpha::BR)).addMBB(TBB);
else // Conditional branch
if (isAlphaIntCondCode(Cond[0].getImm()))
- BuildMI(&MBB, get(Alpha::COND_BRANCH_I))
+ BuildMI(&MBB, dl, get(Alpha::COND_BRANCH_I))
.addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
else
- BuildMI(&MBB, get(Alpha::COND_BRANCH_F))
+ BuildMI(&MBB, dl, get(Alpha::COND_BRANCH_F))
.addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
return 1;
}
// Two-way Conditional Branch.
if (isAlphaIntCondCode(Cond[0].getImm()))
- BuildMI(&MBB, get(Alpha::COND_BRANCH_I))
+ BuildMI(&MBB, dl, get(Alpha::COND_BRANCH_I))
.addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
else
- BuildMI(&MBB, get(Alpha::COND_BRANCH_F))
+ BuildMI(&MBB, dl, get(Alpha::COND_BRANCH_F))
.addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
- BuildMI(&MBB, get(Alpha::BR)).addMBB(FBB);
+ BuildMI(&MBB, dl, get(Alpha::BR)).addMBB(FBB);
return 2;
}
-void AlphaInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC) const {
+bool AlphaInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *DestRC,
+ const TargetRegisterClass *SrcRC) const {
//cerr << "copyRegToReg " << DestReg << " <- " << SrcReg << "\n";
if (DestRC != SrcRC) {
- cerr << "Not yet supported!";
- abort();
+ // Not yet supported!
+ return false;
}
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
if (DestRC == Alpha::GPRCRegisterClass) {
- BuildMI(MBB, MI, get(Alpha::BISr), DestReg).addReg(SrcReg).addReg(SrcReg);
+ BuildMI(MBB, MI, DL, get(Alpha::BISr), DestReg)
+ .addReg(SrcReg)
+ .addReg(SrcReg);
} else if (DestRC == Alpha::F4RCRegisterClass) {
- BuildMI(MBB, MI, get(Alpha::CPYSS), DestReg).addReg(SrcReg).addReg(SrcReg);
+ BuildMI(MBB, MI, DL, get(Alpha::CPYSS), DestReg)
+ .addReg(SrcReg)
+ .addReg(SrcReg);
} else if (DestRC == Alpha::F8RCRegisterClass) {
- BuildMI(MBB, MI, get(Alpha::CPYST), DestReg).addReg(SrcReg).addReg(SrcReg);
+ BuildMI(MBB, MI, DL, get(Alpha::CPYST), DestReg)
+ .addReg(SrcReg)
+ .addReg(SrcReg);
} else {
- cerr << "Attempt to copy register that is not GPR or FPR";
- abort();
+ // Attempt to copy register that is not GPR or FPR
+ return false;
}
+
+ return true;
}
void
AlphaInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- unsigned SrcReg, bool isKill, int FrameIdx,
- const TargetRegisterClass *RC) const {
+ MachineBasicBlock::iterator MI,
+ unsigned SrcReg, bool isKill, int FrameIdx,
+ const TargetRegisterClass *RC) const {
//cerr << "Trying to store " << getPrettyName(SrcReg) << " to "
// << FrameIdx << "\n";
//BuildMI(MBB, MI, Alpha::WTF, 0).addReg(SrcReg);
+
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
if (RC == Alpha::F4RCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::STS))
- .addReg(SrcReg, false, false, isKill)
+ BuildMI(MBB, MI, DL, get(Alpha::STS))
+ .addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else if (RC == Alpha::F8RCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::STT))
- .addReg(SrcReg, false, false, isKill)
+ BuildMI(MBB, MI, DL, get(Alpha::STT))
+ .addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else if (RC == Alpha::GPRCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::STQ))
- .addReg(SrcReg, false, false, isKill)
+ BuildMI(MBB, MI, DL, get(Alpha::STQ))
+ .addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else
- abort();
-}
-
-void AlphaInstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
- bool isKill,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const {
- unsigned Opc = 0;
- if (RC == Alpha::F4RCRegisterClass)
- Opc = Alpha::STS;
- else if (RC == Alpha::F8RCRegisterClass)
- Opc = Alpha::STT;
- else if (RC == Alpha::GPRCRegisterClass)
- Opc = Alpha::STQ;
- else
- abort();
- MachineInstrBuilder MIB =
- BuildMI(get(Opc)).addReg(SrcReg, false, false, isKill);
- for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
- MachineOperand &MO = Addr[i];
- if (MO.isRegister())
- MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
- else
- MIB.addImm(MO.getImm());
- }
- NewMIs.push_back(MIB);
+ llvm_unreachable("Unhandled register class");
}
void
const TargetRegisterClass *RC) const {
//cerr << "Trying to load " << getPrettyName(DestReg) << " to "
// << FrameIdx << "\n";
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
if (RC == Alpha::F4RCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::LDS), DestReg)
+ BuildMI(MBB, MI, DL, get(Alpha::LDS), DestReg)
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else if (RC == Alpha::F8RCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::LDT), DestReg)
+ BuildMI(MBB, MI, DL, get(Alpha::LDT), DestReg)
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else if (RC == Alpha::GPRCRegisterClass)
- BuildMI(MBB, MI, get(Alpha::LDQ), DestReg)
+ BuildMI(MBB, MI, DL, get(Alpha::LDQ), DestReg)
.addFrameIndex(FrameIdx).addReg(Alpha::F31);
else
- abort();
+ llvm_unreachable("Unhandled register class");
}
-void AlphaInstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
- SmallVectorImpl<MachineOperand> &Addr,
- const TargetRegisterClass *RC,
- SmallVectorImpl<MachineInstr*> &NewMIs) const {
- unsigned Opc = 0;
- if (RC == Alpha::F4RCRegisterClass)
- Opc = Alpha::LDS;
- else if (RC == Alpha::F8RCRegisterClass)
- Opc = Alpha::LDT;
- else if (RC == Alpha::GPRCRegisterClass)
- Opc = Alpha::LDQ;
- else
- abort();
- MachineInstrBuilder MIB =
- BuildMI(get(Opc), DestReg);
- for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
- MachineOperand &MO = Addr[i];
- if (MO.isRegister())
- MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
- else
- MIB.addImm(MO.getImm());
- }
- NewMIs.push_back(MIB);
+MachineInstr *AlphaInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
+ MachineInstr *MI,
+ const SmallVectorImpl<unsigned> &Ops,
+ int FrameIndex) const {
+ if (Ops.size() != 1) return NULL;
+
+ // Make sure this is a reg-reg copy.
+ unsigned Opc = MI->getOpcode();
+
+ MachineInstr *NewMI = NULL;
+ switch(Opc) {
+ default:
+ break;
+ case Alpha::BISr:
+ case Alpha::CPYSS:
+ case Alpha::CPYST:
+ if (MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
+ if (Ops[0] == 0) { // move -> store
+ unsigned InReg = MI->getOperand(1).getReg();
+ bool isKill = MI->getOperand(1).isKill();
+ bool isUndef = MI->getOperand(1).isUndef();
+ Opc = (Opc == Alpha::BISr) ? Alpha::STQ :
+ ((Opc == Alpha::CPYSS) ? Alpha::STS : Alpha::STT);
+ NewMI = BuildMI(MF, MI->getDebugLoc(), get(Opc))
+ .addReg(InReg, getKillRegState(isKill) | getUndefRegState(isUndef))
+ .addFrameIndex(FrameIndex)
+ .addReg(Alpha::F31);
+ } else { // load -> move
+ unsigned OutReg = MI->getOperand(0).getReg();
+ bool isDead = MI->getOperand(0).isDead();
+ bool isUndef = MI->getOperand(0).isUndef();
+ Opc = (Opc == Alpha::BISr) ? Alpha::LDQ :
+ ((Opc == Alpha::CPYSS) ? Alpha::LDS : Alpha::LDT);
+ NewMI = BuildMI(MF, MI->getDebugLoc(), get(Opc))
+ .addReg(OutReg, RegState::Define | getDeadRegState(isDead) |
+ getUndefRegState(isUndef))
+ .addFrameIndex(FrameIndex)
+ .addReg(Alpha::F31);
+ }
+ }
+ break;
+ }
+ return NewMI;
}
static unsigned AlphaRevCondCode(unsigned Opcode) {
case Alpha::FBLE: return Alpha::FBGT;
case Alpha::FBLT: return Alpha::FBGE;
default:
- assert(0 && "Unknown opcode");
+ llvm_unreachable("Unknown opcode");
}
+ return 0; // Not reached
}
// Branch analysis.
bool AlphaInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
- MachineBasicBlock *&FBB,
- std::vector<MachineOperand> &Cond) const {
+ MachineBasicBlock *&FBB,
+ SmallVectorImpl<MachineOperand> &Cond,
+ bool AllowModify) const {
// If the block has no terminators, it just falls into the block after it.
MachineBasicBlock::iterator I = MBB.end();
if (I == MBB.begin() || !isUnpredicatedTerminator(--I))
LastInst->getOpcode() == Alpha::BR) {
TBB = SecondLastInst->getOperand(0).getMBB();
I = LastInst;
- I->eraseFromParent();
+ if (AllowModify)
+ I->eraseFromParent();
return false;
}
void AlphaInstrInfo::insertNoop(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const {
- BuildMI(MBB, MI, get(Alpha::BISr), Alpha::R31).addReg(Alpha::R31)
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+ BuildMI(MBB, MI, DL, get(Alpha::BISr), Alpha::R31)
+ .addReg(Alpha::R31)
.addReg(Alpha::R31);
}
-bool AlphaInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
- if (MBB.empty()) return false;
-
- switch (MBB.back().getOpcode()) {
- case Alpha::RETDAG: // Return.
- case Alpha::RETDAGp:
- case Alpha::BR: // Uncond branch.
- case Alpha::JMP: // Indirect branch.
- return true;
- default: return false;
- }
-}
bool AlphaInstrInfo::
-ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
+ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
assert(Cond.size() == 2 && "Invalid Alpha branch opcode!");
Cond[0].setImm(AlphaRevCondCode(Cond[0].getImm()));
return false;
}
+/// getGlobalBaseReg - Return a virtual register initialized with the
+/// the global base register value. Output instructions required to
+/// initialize the register in the function entry block, if necessary.
+///
+unsigned AlphaInstrInfo::getGlobalBaseReg(MachineFunction *MF) const {
+ AlphaMachineFunctionInfo *AlphaFI = MF->getInfo<AlphaMachineFunctionInfo>();
+ unsigned GlobalBaseReg = AlphaFI->getGlobalBaseReg();
+ if (GlobalBaseReg != 0)
+ return GlobalBaseReg;
+
+ // Insert the set of GlobalBaseReg into the first MBB of the function
+ MachineBasicBlock &FirstMBB = MF->front();
+ MachineBasicBlock::iterator MBBI = FirstMBB.begin();
+ MachineRegisterInfo &RegInfo = MF->getRegInfo();
+ const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
+
+ GlobalBaseReg = RegInfo.createVirtualRegister(&Alpha::GPRCRegClass);
+ bool Ok = TII->copyRegToReg(FirstMBB, MBBI, GlobalBaseReg, Alpha::R29,
+ &Alpha::GPRCRegClass, &Alpha::GPRCRegClass);
+ assert(Ok && "Couldn't assign to global base register!");
+ Ok = Ok; // Silence warning when assertions are turned off.
+ RegInfo.addLiveIn(Alpha::R29);
+
+ AlphaFI->setGlobalBaseReg(GlobalBaseReg);
+ return GlobalBaseReg;
+}
+
+/// getGlobalRetAddr - Return a virtual register initialized with the
+/// the global base register value. Output instructions required to
+/// initialize the register in the function entry block, if necessary.
+///
+unsigned AlphaInstrInfo::getGlobalRetAddr(MachineFunction *MF) const {
+ AlphaMachineFunctionInfo *AlphaFI = MF->getInfo<AlphaMachineFunctionInfo>();
+ unsigned GlobalRetAddr = AlphaFI->getGlobalRetAddr();
+ if (GlobalRetAddr != 0)
+ return GlobalRetAddr;
+
+ // Insert the set of GlobalRetAddr into the first MBB of the function
+ MachineBasicBlock &FirstMBB = MF->front();
+ MachineBasicBlock::iterator MBBI = FirstMBB.begin();
+ MachineRegisterInfo &RegInfo = MF->getRegInfo();
+ const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
+
+ GlobalRetAddr = RegInfo.createVirtualRegister(&Alpha::GPRCRegClass);
+ bool Ok = TII->copyRegToReg(FirstMBB, MBBI, GlobalRetAddr, Alpha::R26,
+ &Alpha::GPRCRegClass, &Alpha::GPRCRegClass);
+ assert(Ok && "Couldn't assign to global return address register!");
+ Ok = Ok; // Silence warning when assertions are turned off.
+ RegInfo.addLiveIn(Alpha::R26);
+
+ AlphaFI->setGlobalRetAddr(GlobalRetAddr);
+ return GlobalRetAddr;
+}
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