1 //===-- SystemZInstrInfo.cpp - SystemZ instruction information ------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file contains the SystemZ implementation of the TargetInstrInfo class.
11 //===----------------------------------------------------------------------===//
13 #include "SystemZInstrInfo.h"
14 #include "MCTargetDesc/SystemZMCTargetDesc.h"
16 #include "SystemZInstrBuilder.h"
17 #include "SystemZSubtarget.h"
18 #include "llvm/ADT/Statistic.h"
19 #include "llvm/CodeGen/LiveInterval.h"
20 #include "llvm/CodeGen/LiveIntervals.h"
21 #include "llvm/CodeGen/LiveVariables.h"
22 #include "llvm/CodeGen/MachineBasicBlock.h"
23 #include "llvm/CodeGen/MachineFrameInfo.h"
24 #include "llvm/CodeGen/MachineFunction.h"
25 #include "llvm/CodeGen/MachineInstr.h"
26 #include "llvm/CodeGen/MachineMemOperand.h"
27 #include "llvm/CodeGen/MachineOperand.h"
28 #include "llvm/CodeGen/MachineRegisterInfo.h"
29 #include "llvm/CodeGen/SlotIndexes.h"
30 #include "llvm/CodeGen/TargetInstrInfo.h"
31 #include "llvm/CodeGen/TargetSubtargetInfo.h"
32 #include "llvm/MC/MCInstrDesc.h"
33 #include "llvm/MC/MCRegisterInfo.h"
34 #include "llvm/Support/BranchProbability.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/MathExtras.h"
37 #include "llvm/Target/TargetMachine.h"
44 #define GET_INSTRINFO_CTOR_DTOR
45 #define GET_INSTRMAP_INFO
46 #include "SystemZGenInstrInfo.inc"
48 #define DEBUG_TYPE "systemz-II"
50 // Return a mask with Count low bits set.
51 static uint64_t allOnes(unsigned int Count) {
52 return Count == 0 ? 0 : (uint64_t(1) << (Count - 1) << 1) - 1;
55 // Pin the vtable to this file.
56 void SystemZInstrInfo::anchor() {}
58 SystemZInstrInfo::SystemZInstrInfo(SystemZSubtarget &sti)
59 : SystemZGenInstrInfo(SystemZ::ADJCALLSTACKDOWN, SystemZ::ADJCALLSTACKUP),
63 // MI is a 128-bit load or store. Split it into two 64-bit loads or stores,
64 // each having the opcode given by NewOpcode.
65 void SystemZInstrInfo::splitMove(MachineBasicBlock::iterator MI,
66 unsigned NewOpcode) const {
67 MachineBasicBlock *MBB = MI->getParent();
68 MachineFunction &MF = *MBB->getParent();
70 // Get two load or store instructions. Use the original instruction for one
71 // of them (arbitrarily the second here) and create a clone for the other.
72 MachineInstr *EarlierMI = MF.CloneMachineInstr(&*MI);
73 MBB->insert(MI, EarlierMI);
75 // Set up the two 64-bit registers and remember super reg and its flags.
76 MachineOperand &HighRegOp = EarlierMI->getOperand(0);
77 MachineOperand &LowRegOp = MI->getOperand(0);
78 Register Reg128 = LowRegOp.getReg();
79 unsigned Reg128Killed = getKillRegState(LowRegOp.isKill());
80 unsigned Reg128Undef = getUndefRegState(LowRegOp.isUndef());
81 HighRegOp.setReg(RI.getSubReg(HighRegOp.getReg(), SystemZ::subreg_h64));
82 LowRegOp.setReg(RI.getSubReg(LowRegOp.getReg(), SystemZ::subreg_l64));
85 // Add implicit uses of the super register in case one of the subregs is
86 // undefined. We could track liveness and skip storing an undefined
87 // subreg, but this is hopefully rare (discovered with llvm-stress).
88 // If Reg128 was killed, set kill flag on MI.
89 unsigned Reg128UndefImpl = (Reg128Undef | RegState::Implicit);
90 MachineInstrBuilder(MF, EarlierMI).addReg(Reg128, Reg128UndefImpl);
91 MachineInstrBuilder(MF, MI).addReg(Reg128, (Reg128UndefImpl | Reg128Killed));
94 // The address in the first (high) instruction is already correct.
95 // Adjust the offset in the second (low) instruction.
96 MachineOperand &HighOffsetOp = EarlierMI->getOperand(2);
97 MachineOperand &LowOffsetOp = MI->getOperand(2);
98 LowOffsetOp.setImm(LowOffsetOp.getImm() + 8);
100 // Clear the kill flags on the registers in the first instruction.
101 if (EarlierMI->getOperand(0).isReg() && EarlierMI->getOperand(0).isUse())
102 EarlierMI->getOperand(0).setIsKill(false);
103 EarlierMI->getOperand(1).setIsKill(false);
104 EarlierMI->getOperand(3).setIsKill(false);
107 unsigned HighOpcode = getOpcodeForOffset(NewOpcode, HighOffsetOp.getImm());
108 unsigned LowOpcode = getOpcodeForOffset(NewOpcode, LowOffsetOp.getImm());
109 assert(HighOpcode && LowOpcode && "Both offsets should be in range");
111 EarlierMI->setDesc(get(HighOpcode));
112 MI->setDesc(get(LowOpcode));
115 // Split ADJDYNALLOC instruction MI.
116 void SystemZInstrInfo::splitAdjDynAlloc(MachineBasicBlock::iterator MI) const {
117 MachineBasicBlock *MBB = MI->getParent();
118 MachineFunction &MF = *MBB->getParent();
119 MachineFrameInfo &MFFrame = MF.getFrameInfo();
120 MachineOperand &OffsetMO = MI->getOperand(2);
122 uint64_t Offset = (MFFrame.getMaxCallFrameSize() +
123 SystemZMC::CallFrameSize +
125 unsigned NewOpcode = getOpcodeForOffset(SystemZ::LA, Offset);
126 assert(NewOpcode && "No support for huge argument lists yet");
127 MI->setDesc(get(NewOpcode));
128 OffsetMO.setImm(Offset);
131 // MI is an RI-style pseudo instruction. Replace it with LowOpcode
132 // if the first operand is a low GR32 and HighOpcode if the first operand
133 // is a high GR32. ConvertHigh is true if LowOpcode takes a signed operand
134 // and HighOpcode takes an unsigned 32-bit operand. In those cases,
135 // MI has the same kind of operand as LowOpcode, so needs to be converted
136 // if HighOpcode is used.
137 void SystemZInstrInfo::expandRIPseudo(MachineInstr &MI, unsigned LowOpcode,
139 bool ConvertHigh) const {
140 Register Reg = MI.getOperand(0).getReg();
141 bool IsHigh = SystemZ::isHighReg(Reg);
142 MI.setDesc(get(IsHigh ? HighOpcode : LowOpcode));
143 if (IsHigh && ConvertHigh)
144 MI.getOperand(1).setImm(uint32_t(MI.getOperand(1).getImm()));
147 // MI is a three-operand RIE-style pseudo instruction. Replace it with
148 // LowOpcodeK if the registers are both low GR32s, otherwise use a move
149 // followed by HighOpcode or LowOpcode, depending on whether the target
150 // is a high or low GR32.
151 void SystemZInstrInfo::expandRIEPseudo(MachineInstr &MI, unsigned LowOpcode,
153 unsigned HighOpcode) const {
154 Register DestReg = MI.getOperand(0).getReg();
155 Register SrcReg = MI.getOperand(1).getReg();
156 bool DestIsHigh = SystemZ::isHighReg(DestReg);
157 bool SrcIsHigh = SystemZ::isHighReg(SrcReg);
158 if (!DestIsHigh && !SrcIsHigh)
159 MI.setDesc(get(LowOpcodeK));
161 if (DestReg != SrcReg) {
162 emitGRX32Move(*MI.getParent(), MI, MI.getDebugLoc(), DestReg, SrcReg,
163 SystemZ::LR, 32, MI.getOperand(1).isKill(),
164 MI.getOperand(1).isUndef());
165 MI.getOperand(1).setReg(DestReg);
167 MI.setDesc(get(DestIsHigh ? HighOpcode : LowOpcode));
168 MI.tieOperands(0, 1);
172 // MI is an RXY-style pseudo instruction. Replace it with LowOpcode
173 // if the first operand is a low GR32 and HighOpcode if the first operand
175 void SystemZInstrInfo::expandRXYPseudo(MachineInstr &MI, unsigned LowOpcode,
176 unsigned HighOpcode) const {
177 Register Reg = MI.getOperand(0).getReg();
178 unsigned Opcode = getOpcodeForOffset(
179 SystemZ::isHighReg(Reg) ? HighOpcode : LowOpcode,
180 MI.getOperand(2).getImm());
181 MI.setDesc(get(Opcode));
184 // MI is a load-on-condition pseudo instruction with a single register
185 // (source or destination) operand. Replace it with LowOpcode if the
186 // register is a low GR32 and HighOpcode if the register is a high GR32.
187 void SystemZInstrInfo::expandLOCPseudo(MachineInstr &MI, unsigned LowOpcode,
188 unsigned HighOpcode) const {
189 Register Reg = MI.getOperand(0).getReg();
190 unsigned Opcode = SystemZ::isHighReg(Reg) ? HighOpcode : LowOpcode;
191 MI.setDesc(get(Opcode));
194 // MI is an RR-style pseudo instruction that zero-extends the low Size bits
195 // of one GRX32 into another. Replace it with LowOpcode if both operands
196 // are low registers, otherwise use RISB[LH]G.
197 void SystemZInstrInfo::expandZExtPseudo(MachineInstr &MI, unsigned LowOpcode,
198 unsigned Size) const {
199 MachineInstrBuilder MIB =
200 emitGRX32Move(*MI.getParent(), MI, MI.getDebugLoc(),
201 MI.getOperand(0).getReg(), MI.getOperand(1).getReg(), LowOpcode,
202 Size, MI.getOperand(1).isKill(), MI.getOperand(1).isUndef());
204 // Keep the remaining operands as-is.
205 for (unsigned I = 2; I < MI.getNumOperands(); ++I)
206 MIB.add(MI.getOperand(I));
208 MI.eraseFromParent();
211 void SystemZInstrInfo::expandLoadStackGuard(MachineInstr *MI) const {
212 MachineBasicBlock *MBB = MI->getParent();
213 MachineFunction &MF = *MBB->getParent();
214 const Register Reg64 = MI->getOperand(0).getReg();
215 const Register Reg32 = RI.getSubReg(Reg64, SystemZ::subreg_l32);
217 // EAR can only load the low subregister so us a shift for %a0 to produce
218 // the GR containing %a0 and %a1.
221 BuildMI(*MBB, MI, MI->getDebugLoc(), get(SystemZ::EAR), Reg32)
223 .addReg(Reg64, RegState::ImplicitDefine);
225 // sllg <reg>, <reg>, 32
226 BuildMI(*MBB, MI, MI->getDebugLoc(), get(SystemZ::SLLG), Reg64)
232 BuildMI(*MBB, MI, MI->getDebugLoc(), get(SystemZ::EAR), Reg32)
233 .addReg(SystemZ::A1);
235 // lg <reg>, 40(<reg>)
236 MI->setDesc(get(SystemZ::LG));
237 MachineInstrBuilder(MF, MI).addReg(Reg64).addImm(40).addReg(0);
240 // Emit a zero-extending move from 32-bit GPR SrcReg to 32-bit GPR
241 // DestReg before MBBI in MBB. Use LowLowOpcode when both DestReg and SrcReg
242 // are low registers, otherwise use RISB[LH]G. Size is the number of bits
243 // taken from the low end of SrcReg (8 for LLCR, 16 for LLHR and 32 for LR).
244 // KillSrc is true if this move is the last use of SrcReg.
246 SystemZInstrInfo::emitGRX32Move(MachineBasicBlock &MBB,
247 MachineBasicBlock::iterator MBBI,
248 const DebugLoc &DL, unsigned DestReg,
249 unsigned SrcReg, unsigned LowLowOpcode,
250 unsigned Size, bool KillSrc,
251 bool UndefSrc) const {
253 bool DestIsHigh = SystemZ::isHighReg(DestReg);
254 bool SrcIsHigh = SystemZ::isHighReg(SrcReg);
255 if (DestIsHigh && SrcIsHigh)
256 Opcode = SystemZ::RISBHH;
257 else if (DestIsHigh && !SrcIsHigh)
258 Opcode = SystemZ::RISBHL;
259 else if (!DestIsHigh && SrcIsHigh)
260 Opcode = SystemZ::RISBLH;
262 return BuildMI(MBB, MBBI, DL, get(LowLowOpcode), DestReg)
263 .addReg(SrcReg, getKillRegState(KillSrc) | getUndefRegState(UndefSrc));
265 unsigned Rotate = (DestIsHigh != SrcIsHigh ? 32 : 0);
266 return BuildMI(MBB, MBBI, DL, get(Opcode), DestReg)
267 .addReg(DestReg, RegState::Undef)
268 .addReg(SrcReg, getKillRegState(KillSrc) | getUndefRegState(UndefSrc))
269 .addImm(32 - Size).addImm(128 + 31).addImm(Rotate);
272 MachineInstr *SystemZInstrInfo::commuteInstructionImpl(MachineInstr &MI,
275 unsigned OpIdx2) const {
276 auto cloneIfNew = [NewMI](MachineInstr &MI) -> MachineInstr & {
278 return *MI.getParent()->getParent()->CloneMachineInstr(&MI);
282 switch (MI.getOpcode()) {
283 case SystemZ::SELRMux:
284 case SystemZ::SELFHR:
287 case SystemZ::LOCRMux:
288 case SystemZ::LOCFHR:
290 case SystemZ::LOCGR: {
291 auto &WorkingMI = cloneIfNew(MI);
293 unsigned CCValid = WorkingMI.getOperand(3).getImm();
294 unsigned CCMask = WorkingMI.getOperand(4).getImm();
295 WorkingMI.getOperand(4).setImm(CCMask ^ CCValid);
296 return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
300 return TargetInstrInfo::commuteInstructionImpl(MI, NewMI, OpIdx1, OpIdx2);
304 // If MI is a simple load or store for a frame object, return the register
305 // it loads or stores and set FrameIndex to the index of the frame object.
306 // Return 0 otherwise.
308 // Flag is SimpleBDXLoad for loads and SimpleBDXStore for stores.
309 static int isSimpleMove(const MachineInstr &MI, int &FrameIndex,
311 const MCInstrDesc &MCID = MI.getDesc();
312 if ((MCID.TSFlags & Flag) && MI.getOperand(1).isFI() &&
313 MI.getOperand(2).getImm() == 0 && MI.getOperand(3).getReg() == 0) {
314 FrameIndex = MI.getOperand(1).getIndex();
315 return MI.getOperand(0).getReg();
320 unsigned SystemZInstrInfo::isLoadFromStackSlot(const MachineInstr &MI,
321 int &FrameIndex) const {
322 return isSimpleMove(MI, FrameIndex, SystemZII::SimpleBDXLoad);
325 unsigned SystemZInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
326 int &FrameIndex) const {
327 return isSimpleMove(MI, FrameIndex, SystemZII::SimpleBDXStore);
330 bool SystemZInstrInfo::isStackSlotCopy(const MachineInstr &MI,
332 int &SrcFrameIndex) const {
333 // Check for MVC 0(Length,FI1),0(FI2)
334 const MachineFrameInfo &MFI = MI.getParent()->getParent()->getFrameInfo();
335 if (MI.getOpcode() != SystemZ::MVC || !MI.getOperand(0).isFI() ||
336 MI.getOperand(1).getImm() != 0 || !MI.getOperand(3).isFI() ||
337 MI.getOperand(4).getImm() != 0)
340 // Check that Length covers the full slots.
341 int64_t Length = MI.getOperand(2).getImm();
342 unsigned FI1 = MI.getOperand(0).getIndex();
343 unsigned FI2 = MI.getOperand(3).getIndex();
344 if (MFI.getObjectSize(FI1) != Length ||
345 MFI.getObjectSize(FI2) != Length)
348 DestFrameIndex = FI1;
353 bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
354 MachineBasicBlock *&TBB,
355 MachineBasicBlock *&FBB,
356 SmallVectorImpl<MachineOperand> &Cond,
357 bool AllowModify) const {
358 // Most of the code and comments here are boilerplate.
360 // Start from the bottom of the block and work up, examining the
361 // terminator instructions.
362 MachineBasicBlock::iterator I = MBB.end();
363 while (I != MBB.begin()) {
365 if (I->isDebugInstr())
368 // Working from the bottom, when we see a non-terminator instruction, we're
370 if (!isUnpredicatedTerminator(*I))
373 // A terminator that isn't a branch can't easily be handled by this
378 // Can't handle indirect branches.
379 SystemZII::Branch Branch(getBranchInfo(*I));
380 if (!Branch.hasMBBTarget())
383 // Punt on compound branches.
384 if (Branch.Type != SystemZII::BranchNormal)
387 if (Branch.CCMask == SystemZ::CCMASK_ANY) {
388 // Handle unconditional branches.
390 TBB = Branch.getMBBTarget();
394 // If the block has any instructions after a JMP, delete them.
395 while (std::next(I) != MBB.end())
396 std::next(I)->eraseFromParent();
401 // Delete the JMP if it's equivalent to a fall-through.
402 if (MBB.isLayoutSuccessor(Branch.getMBBTarget())) {
404 I->eraseFromParent();
409 // TBB is used to indicate the unconditinal destination.
410 TBB = Branch.getMBBTarget();
414 // Working from the bottom, handle the first conditional branch.
416 // FIXME: add X86-style branch swap
418 TBB = Branch.getMBBTarget();
419 Cond.push_back(MachineOperand::CreateImm(Branch.CCValid));
420 Cond.push_back(MachineOperand::CreateImm(Branch.CCMask));
424 // Handle subsequent conditional branches.
425 assert(Cond.size() == 2 && TBB && "Should have seen a conditional branch");
427 // Only handle the case where all conditional branches branch to the same
429 if (TBB != Branch.getMBBTarget())
432 // If the conditions are the same, we can leave them alone.
433 unsigned OldCCValid = Cond[0].getImm();
434 unsigned OldCCMask = Cond[1].getImm();
435 if (OldCCValid == Branch.CCValid && OldCCMask == Branch.CCMask)
438 // FIXME: Try combining conditions like X86 does. Should be easy on Z!
445 unsigned SystemZInstrInfo::removeBranch(MachineBasicBlock &MBB,
446 int *BytesRemoved) const {
447 assert(!BytesRemoved && "code size not handled");
449 // Most of the code and comments here are boilerplate.
450 MachineBasicBlock::iterator I = MBB.end();
453 while (I != MBB.begin()) {
455 if (I->isDebugInstr())
459 if (!getBranchInfo(*I).hasMBBTarget())
461 // Remove the branch.
462 I->eraseFromParent();
470 bool SystemZInstrInfo::
471 reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
472 assert(Cond.size() == 2 && "Invalid condition");
473 Cond[1].setImm(Cond[1].getImm() ^ Cond[0].getImm());
477 unsigned SystemZInstrInfo::insertBranch(MachineBasicBlock &MBB,
478 MachineBasicBlock *TBB,
479 MachineBasicBlock *FBB,
480 ArrayRef<MachineOperand> Cond,
482 int *BytesAdded) const {
483 // In this function we output 32-bit branches, which should always
484 // have enough range. They can be shortened and relaxed by later code
485 // in the pipeline, if desired.
487 // Shouldn't be a fall through.
488 assert(TBB && "insertBranch must not be told to insert a fallthrough");
489 assert((Cond.size() == 2 || Cond.size() == 0) &&
490 "SystemZ branch conditions have one component!");
491 assert(!BytesAdded && "code size not handled");
494 // Unconditional branch?
495 assert(!FBB && "Unconditional branch with multiple successors!");
496 BuildMI(&MBB, DL, get(SystemZ::J)).addMBB(TBB);
500 // Conditional branch.
502 unsigned CCValid = Cond[0].getImm();
503 unsigned CCMask = Cond[1].getImm();
504 BuildMI(&MBB, DL, get(SystemZ::BRC))
505 .addImm(CCValid).addImm(CCMask).addMBB(TBB);
509 // Two-way Conditional branch. Insert the second branch.
510 BuildMI(&MBB, DL, get(SystemZ::J)).addMBB(FBB);
516 bool SystemZInstrInfo::analyzeCompare(const MachineInstr &MI, Register &SrcReg,
517 Register &SrcReg2, int &Mask,
519 assert(MI.isCompare() && "Caller should have checked for a comparison");
521 if (MI.getNumExplicitOperands() == 2 && MI.getOperand(0).isReg() &&
522 MI.getOperand(1).isImm()) {
523 SrcReg = MI.getOperand(0).getReg();
525 Value = MI.getOperand(1).getImm();
533 bool SystemZInstrInfo::canInsertSelect(const MachineBasicBlock &MBB,
534 ArrayRef<MachineOperand> Pred,
535 Register DstReg, Register TrueReg,
536 Register FalseReg, int &CondCycles,
538 int &FalseCycles) const {
539 // Not all subtargets have LOCR instructions.
540 if (!STI.hasLoadStoreOnCond())
542 if (Pred.size() != 2)
545 // Check register classes.
546 const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
547 const TargetRegisterClass *RC =
548 RI.getCommonSubClass(MRI.getRegClass(TrueReg), MRI.getRegClass(FalseReg));
552 // We have LOCR instructions for 32 and 64 bit general purpose registers.
553 if ((STI.hasLoadStoreOnCond2() &&
554 SystemZ::GRX32BitRegClass.hasSubClassEq(RC)) ||
555 SystemZ::GR32BitRegClass.hasSubClassEq(RC) ||
556 SystemZ::GR64BitRegClass.hasSubClassEq(RC)) {
563 // Can't do anything else.
567 void SystemZInstrInfo::insertSelect(MachineBasicBlock &MBB,
568 MachineBasicBlock::iterator I,
569 const DebugLoc &DL, Register DstReg,
570 ArrayRef<MachineOperand> Pred,
572 Register FalseReg) const {
573 MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
574 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
576 assert(Pred.size() == 2 && "Invalid condition");
577 unsigned CCValid = Pred[0].getImm();
578 unsigned CCMask = Pred[1].getImm();
581 if (SystemZ::GRX32BitRegClass.hasSubClassEq(RC)) {
582 if (STI.hasMiscellaneousExtensions3())
583 Opc = SystemZ::SELRMux;
584 else if (STI.hasLoadStoreOnCond2())
585 Opc = SystemZ::LOCRMux;
588 MRI.constrainRegClass(DstReg, &SystemZ::GR32BitRegClass);
589 Register TReg = MRI.createVirtualRegister(&SystemZ::GR32BitRegClass);
590 Register FReg = MRI.createVirtualRegister(&SystemZ::GR32BitRegClass);
591 BuildMI(MBB, I, DL, get(TargetOpcode::COPY), TReg).addReg(TrueReg);
592 BuildMI(MBB, I, DL, get(TargetOpcode::COPY), FReg).addReg(FalseReg);
596 } else if (SystemZ::GR64BitRegClass.hasSubClassEq(RC)) {
597 if (STI.hasMiscellaneousExtensions3())
598 Opc = SystemZ::SELGR;
600 Opc = SystemZ::LOCGR;
602 llvm_unreachable("Invalid register class");
604 BuildMI(MBB, I, DL, get(Opc), DstReg)
605 .addReg(FalseReg).addReg(TrueReg)
606 .addImm(CCValid).addImm(CCMask);
609 bool SystemZInstrInfo::FoldImmediate(MachineInstr &UseMI, MachineInstr &DefMI,
611 MachineRegisterInfo *MRI) const {
612 unsigned DefOpc = DefMI.getOpcode();
613 if (DefOpc != SystemZ::LHIMux && DefOpc != SystemZ::LHI &&
614 DefOpc != SystemZ::LGHI)
616 if (DefMI.getOperand(0).getReg() != Reg)
618 int32_t ImmVal = (int32_t)DefMI.getOperand(1).getImm();
620 unsigned UseOpc = UseMI.getOpcode();
626 case SystemZ::SELRMux:
629 case SystemZ::LOCRMux:
630 if (!STI.hasLoadStoreOnCond2())
632 NewUseOpc = SystemZ::LOCHIMux;
633 if (UseMI.getOperand(2).getReg() == Reg)
635 else if (UseMI.getOperand(1).getReg() == Reg)
636 UseIdx = 2, CommuteIdx = 1;
644 if (!STI.hasLoadStoreOnCond2())
646 NewUseOpc = SystemZ::LOCGHI;
647 if (UseMI.getOperand(2).getReg() == Reg)
649 else if (UseMI.getOperand(1).getReg() == Reg)
650 UseIdx = 2, CommuteIdx = 1;
658 if (CommuteIdx != -1)
659 if (!commuteInstruction(UseMI, false, CommuteIdx, UseIdx))
662 bool DeleteDef = MRI->hasOneNonDBGUse(Reg);
663 UseMI.setDesc(get(NewUseOpc));
665 UseMI.tieOperands(0, 1);
666 UseMI.getOperand(UseIdx).ChangeToImmediate(ImmVal);
668 DefMI.eraseFromParent();
673 bool SystemZInstrInfo::isPredicable(const MachineInstr &MI) const {
674 unsigned Opcode = MI.getOpcode();
675 if (Opcode == SystemZ::Return ||
676 Opcode == SystemZ::Trap ||
677 Opcode == SystemZ::CallJG ||
678 Opcode == SystemZ::CallBR)
683 bool SystemZInstrInfo::
684 isProfitableToIfCvt(MachineBasicBlock &MBB,
685 unsigned NumCycles, unsigned ExtraPredCycles,
686 BranchProbability Probability) const {
687 // Avoid using conditional returns at the end of a loop (since then
688 // we'd need to emit an unconditional branch to the beginning anyway,
689 // making the loop body longer). This doesn't apply for low-probability
690 // loops (eg. compare-and-swap retry), so just decide based on branch
691 // probability instead of looping structure.
692 // However, since Compare and Trap instructions cost the same as a regular
693 // Compare instruction, we should allow the if conversion to convert this
694 // into a Conditional Compare regardless of the branch probability.
695 if (MBB.getLastNonDebugInstr()->getOpcode() != SystemZ::Trap &&
696 MBB.succ_empty() && Probability < BranchProbability(1, 8))
698 // For now only convert single instructions.
699 return NumCycles == 1;
702 bool SystemZInstrInfo::
703 isProfitableToIfCvt(MachineBasicBlock &TMBB,
704 unsigned NumCyclesT, unsigned ExtraPredCyclesT,
705 MachineBasicBlock &FMBB,
706 unsigned NumCyclesF, unsigned ExtraPredCyclesF,
707 BranchProbability Probability) const {
708 // For now avoid converting mutually-exclusive cases.
712 bool SystemZInstrInfo::
713 isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
714 BranchProbability Probability) const {
715 // For now only duplicate single instructions.
716 return NumCycles == 1;
719 bool SystemZInstrInfo::PredicateInstruction(
720 MachineInstr &MI, ArrayRef<MachineOperand> Pred) const {
721 assert(Pred.size() == 2 && "Invalid condition");
722 unsigned CCValid = Pred[0].getImm();
723 unsigned CCMask = Pred[1].getImm();
724 assert(CCMask > 0 && CCMask < 15 && "Invalid predicate");
725 unsigned Opcode = MI.getOpcode();
726 if (Opcode == SystemZ::Trap) {
727 MI.setDesc(get(SystemZ::CondTrap));
728 MachineInstrBuilder(*MI.getParent()->getParent(), MI)
729 .addImm(CCValid).addImm(CCMask)
730 .addReg(SystemZ::CC, RegState::Implicit);
733 if (Opcode == SystemZ::Return) {
734 MI.setDesc(get(SystemZ::CondReturn));
735 MachineInstrBuilder(*MI.getParent()->getParent(), MI)
736 .addImm(CCValid).addImm(CCMask)
737 .addReg(SystemZ::CC, RegState::Implicit);
740 if (Opcode == SystemZ::CallJG) {
741 MachineOperand FirstOp = MI.getOperand(0);
742 const uint32_t *RegMask = MI.getOperand(1).getRegMask();
745 MI.setDesc(get(SystemZ::CallBRCL));
746 MachineInstrBuilder(*MI.getParent()->getParent(), MI)
751 .addReg(SystemZ::CC, RegState::Implicit);
754 if (Opcode == SystemZ::CallBR) {
755 const uint32_t *RegMask = MI.getOperand(0).getRegMask();
757 MI.setDesc(get(SystemZ::CallBCR));
758 MachineInstrBuilder(*MI.getParent()->getParent(), MI)
759 .addImm(CCValid).addImm(CCMask)
761 .addReg(SystemZ::CC, RegState::Implicit);
767 void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
768 MachineBasicBlock::iterator MBBI,
769 const DebugLoc &DL, MCRegister DestReg,
770 MCRegister SrcReg, bool KillSrc) const {
771 // Split 128-bit GPR moves into two 64-bit moves. Add implicit uses of the
772 // super register in case one of the subregs is undefined.
773 // This handles ADDR128 too.
774 if (SystemZ::GR128BitRegClass.contains(DestReg, SrcReg)) {
775 copyPhysReg(MBB, MBBI, DL, RI.getSubReg(DestReg, SystemZ::subreg_h64),
776 RI.getSubReg(SrcReg, SystemZ::subreg_h64), KillSrc);
777 MachineInstrBuilder(*MBB.getParent(), std::prev(MBBI))
778 .addReg(SrcReg, RegState::Implicit);
779 copyPhysReg(MBB, MBBI, DL, RI.getSubReg(DestReg, SystemZ::subreg_l64),
780 RI.getSubReg(SrcReg, SystemZ::subreg_l64), KillSrc);
781 MachineInstrBuilder(*MBB.getParent(), std::prev(MBBI))
782 .addReg(SrcReg, (getKillRegState(KillSrc) | RegState::Implicit));
786 if (SystemZ::GRX32BitRegClass.contains(DestReg, SrcReg)) {
787 emitGRX32Move(MBB, MBBI, DL, DestReg, SrcReg, SystemZ::LR, 32, KillSrc,
792 // Move 128-bit floating-point values between VR128 and FP128.
793 if (SystemZ::VR128BitRegClass.contains(DestReg) &&
794 SystemZ::FP128BitRegClass.contains(SrcReg)) {
795 MCRegister SrcRegHi =
796 RI.getMatchingSuperReg(RI.getSubReg(SrcReg, SystemZ::subreg_h64),
797 SystemZ::subreg_h64, &SystemZ::VR128BitRegClass);
798 MCRegister SrcRegLo =
799 RI.getMatchingSuperReg(RI.getSubReg(SrcReg, SystemZ::subreg_l64),
800 SystemZ::subreg_h64, &SystemZ::VR128BitRegClass);
802 BuildMI(MBB, MBBI, DL, get(SystemZ::VMRHG), DestReg)
803 .addReg(SrcRegHi, getKillRegState(KillSrc))
804 .addReg(SrcRegLo, getKillRegState(KillSrc));
807 if (SystemZ::FP128BitRegClass.contains(DestReg) &&
808 SystemZ::VR128BitRegClass.contains(SrcReg)) {
809 MCRegister DestRegHi =
810 RI.getMatchingSuperReg(RI.getSubReg(DestReg, SystemZ::subreg_h64),
811 SystemZ::subreg_h64, &SystemZ::VR128BitRegClass);
812 MCRegister DestRegLo =
813 RI.getMatchingSuperReg(RI.getSubReg(DestReg, SystemZ::subreg_l64),
814 SystemZ::subreg_h64, &SystemZ::VR128BitRegClass);
816 if (DestRegHi != SrcReg)
817 copyPhysReg(MBB, MBBI, DL, DestRegHi, SrcReg, false);
818 BuildMI(MBB, MBBI, DL, get(SystemZ::VREPG), DestRegLo)
819 .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1);
823 // Move CC value from a GR32.
824 if (DestReg == SystemZ::CC) {
826 SystemZ::GR32BitRegClass.contains(SrcReg) ? SystemZ::TMLH : SystemZ::TMHH;
827 BuildMI(MBB, MBBI, DL, get(Opcode))
828 .addReg(SrcReg, getKillRegState(KillSrc))
829 .addImm(3 << (SystemZ::IPM_CC - 16));
833 // Everything else needs only one instruction.
835 if (SystemZ::GR64BitRegClass.contains(DestReg, SrcReg))
836 Opcode = SystemZ::LGR;
837 else if (SystemZ::FP32BitRegClass.contains(DestReg, SrcReg))
838 // For z13 we prefer LDR over LER to avoid partial register dependencies.
839 Opcode = STI.hasVector() ? SystemZ::LDR32 : SystemZ::LER;
840 else if (SystemZ::FP64BitRegClass.contains(DestReg, SrcReg))
841 Opcode = SystemZ::LDR;
842 else if (SystemZ::FP128BitRegClass.contains(DestReg, SrcReg))
843 Opcode = SystemZ::LXR;
844 else if (SystemZ::VR32BitRegClass.contains(DestReg, SrcReg))
845 Opcode = SystemZ::VLR32;
846 else if (SystemZ::VR64BitRegClass.contains(DestReg, SrcReg))
847 Opcode = SystemZ::VLR64;
848 else if (SystemZ::VR128BitRegClass.contains(DestReg, SrcReg))
849 Opcode = SystemZ::VLR;
850 else if (SystemZ::AR32BitRegClass.contains(DestReg, SrcReg))
851 Opcode = SystemZ::CPYA;
853 llvm_unreachable("Impossible reg-to-reg copy");
855 BuildMI(MBB, MBBI, DL, get(Opcode), DestReg)
856 .addReg(SrcReg, getKillRegState(KillSrc));
859 void SystemZInstrInfo::storeRegToStackSlot(
860 MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register SrcReg,
861 bool isKill, int FrameIdx, const TargetRegisterClass *RC,
862 const TargetRegisterInfo *TRI) const {
863 DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
865 // Callers may expect a single instruction, so keep 128-bit moves
866 // together for now and lower them after register allocation.
867 unsigned LoadOpcode, StoreOpcode;
868 getLoadStoreOpcodes(RC, LoadOpcode, StoreOpcode);
869 addFrameReference(BuildMI(MBB, MBBI, DL, get(StoreOpcode))
870 .addReg(SrcReg, getKillRegState(isKill)),
874 void SystemZInstrInfo::loadRegFromStackSlot(
875 MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register DestReg,
876 int FrameIdx, const TargetRegisterClass *RC,
877 const TargetRegisterInfo *TRI) const {
878 DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
880 // Callers may expect a single instruction, so keep 128-bit moves
881 // together for now and lower them after register allocation.
882 unsigned LoadOpcode, StoreOpcode;
883 getLoadStoreOpcodes(RC, LoadOpcode, StoreOpcode);
884 addFrameReference(BuildMI(MBB, MBBI, DL, get(LoadOpcode), DestReg),
888 // Return true if MI is a simple load or store with a 12-bit displacement
889 // and no index. Flag is SimpleBDXLoad for loads and SimpleBDXStore for stores.
890 static bool isSimpleBD12Move(const MachineInstr *MI, unsigned Flag) {
891 const MCInstrDesc &MCID = MI->getDesc();
892 return ((MCID.TSFlags & Flag) &&
893 isUInt<12>(MI->getOperand(2).getImm()) &&
894 MI->getOperand(3).getReg() == 0);
901 LogicOp(unsigned regSize, unsigned immLSB, unsigned immSize)
902 : RegSize(regSize), ImmLSB(immLSB), ImmSize(immSize) {}
904 explicit operator bool() const { return RegSize; }
906 unsigned RegSize = 0;
908 unsigned ImmSize = 0;
911 } // end anonymous namespace
913 static LogicOp interpretAndImmediate(unsigned Opcode) {
915 case SystemZ::NILMux: return LogicOp(32, 0, 16);
916 case SystemZ::NIHMux: return LogicOp(32, 16, 16);
917 case SystemZ::NILL64: return LogicOp(64, 0, 16);
918 case SystemZ::NILH64: return LogicOp(64, 16, 16);
919 case SystemZ::NIHL64: return LogicOp(64, 32, 16);
920 case SystemZ::NIHH64: return LogicOp(64, 48, 16);
921 case SystemZ::NIFMux: return LogicOp(32, 0, 32);
922 case SystemZ::NILF64: return LogicOp(64, 0, 32);
923 case SystemZ::NIHF64: return LogicOp(64, 32, 32);
924 default: return LogicOp();
928 static void transferDeadCC(MachineInstr *OldMI, MachineInstr *NewMI) {
929 if (OldMI->registerDefIsDead(SystemZ::CC)) {
930 MachineOperand *CCDef = NewMI->findRegisterDefOperand(SystemZ::CC);
931 if (CCDef != nullptr)
932 CCDef->setIsDead(true);
936 static void transferMIFlag(MachineInstr *OldMI, MachineInstr *NewMI,
937 MachineInstr::MIFlag Flag) {
938 if (OldMI->getFlag(Flag))
939 NewMI->setFlag(Flag);
942 MachineInstr *SystemZInstrInfo::convertToThreeAddress(
943 MachineFunction::iterator &MFI, MachineInstr &MI, LiveVariables *LV) const {
944 MachineBasicBlock *MBB = MI.getParent();
946 // Try to convert an AND into an RISBG-type instruction.
947 // TODO: It might be beneficial to select RISBG and shorten to AND instead.
948 if (LogicOp And = interpretAndImmediate(MI.getOpcode())) {
949 uint64_t Imm = MI.getOperand(2).getImm() << And.ImmLSB;
950 // AND IMMEDIATE leaves the other bits of the register unchanged.
951 Imm |= allOnes(And.RegSize) & ~(allOnes(And.ImmSize) << And.ImmLSB);
953 if (isRxSBGMask(Imm, And.RegSize, Start, End)) {
955 if (And.RegSize == 64) {
956 NewOpcode = SystemZ::RISBG;
957 // Prefer RISBGN if available, since it does not clobber CC.
958 if (STI.hasMiscellaneousExtensions())
959 NewOpcode = SystemZ::RISBGN;
961 NewOpcode = SystemZ::RISBMux;
965 MachineOperand &Dest = MI.getOperand(0);
966 MachineOperand &Src = MI.getOperand(1);
967 MachineInstrBuilder MIB =
968 BuildMI(*MBB, MI, MI.getDebugLoc(), get(NewOpcode))
971 .addReg(Src.getReg(), getKillRegState(Src.isKill()),
977 unsigned NumOps = MI.getNumOperands();
978 for (unsigned I = 1; I < NumOps; ++I) {
979 MachineOperand &Op = MI.getOperand(I);
980 if (Op.isReg() && Op.isKill())
981 LV->replaceKillInstruction(Op.getReg(), MI, *MIB);
984 transferDeadCC(&MI, MIB);
991 MachineInstr *SystemZInstrInfo::foldMemoryOperandImpl(
992 MachineFunction &MF, MachineInstr &MI, ArrayRef<unsigned> Ops,
993 MachineBasicBlock::iterator InsertPt, int FrameIndex,
994 LiveIntervals *LIS, VirtRegMap *VRM) const {
995 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
996 MachineRegisterInfo &MRI = MF.getRegInfo();
997 const MachineFrameInfo &MFI = MF.getFrameInfo();
998 unsigned Size = MFI.getObjectSize(FrameIndex);
999 unsigned Opcode = MI.getOpcode();
1001 // Check CC liveness if new instruction introduces a dead def of CC.
1002 MCRegUnitIterator CCUnit(SystemZ::CC, TRI);
1003 SlotIndex MISlot = SlotIndex();
1004 LiveRange *CCLiveRange = nullptr;
1005 bool CCLiveAtMI = true;
1007 MISlot = LIS->getSlotIndexes()->getInstructionIndex(MI).getRegSlot();
1008 CCLiveRange = &LIS->getRegUnit(*CCUnit);
1009 CCLiveAtMI = CCLiveRange->liveAt(MISlot);
1012 assert(!CCUnit.isValid() && "CC only has one reg unit.");
1014 if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
1015 if (!CCLiveAtMI && (Opcode == SystemZ::LA || Opcode == SystemZ::LAY) &&
1016 isInt<8>(MI.getOperand(2).getImm()) && !MI.getOperand(3).getReg()) {
1017 // LA(Y) %reg, CONST(%reg) -> AGSI %mem, CONST
1018 MachineInstr *BuiltMI = BuildMI(*InsertPt->getParent(), InsertPt,
1019 MI.getDebugLoc(), get(SystemZ::AGSI))
1020 .addFrameIndex(FrameIndex)
1022 .addImm(MI.getOperand(2).getImm());
1023 BuiltMI->findRegisterDefOperand(SystemZ::CC)->setIsDead(true);
1024 CCLiveRange->createDeadDef(MISlot, LIS->getVNInfoAllocator());
1030 // All other cases require a single operand.
1031 if (Ops.size() != 1)
1034 unsigned OpNum = Ops[0];
1036 TRI->getRegSizeInBits(*MF.getRegInfo()
1037 .getRegClass(MI.getOperand(OpNum).getReg())) &&
1038 "Invalid size combination");
1040 if ((Opcode == SystemZ::AHI || Opcode == SystemZ::AGHI) && OpNum == 0 &&
1041 isInt<8>(MI.getOperand(2).getImm())) {
1042 // A(G)HI %reg, CONST -> A(G)SI %mem, CONST
1043 Opcode = (Opcode == SystemZ::AHI ? SystemZ::ASI : SystemZ::AGSI);
1044 MachineInstr *BuiltMI =
1045 BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(), get(Opcode))
1046 .addFrameIndex(FrameIndex)
1048 .addImm(MI.getOperand(2).getImm());
1049 transferDeadCC(&MI, BuiltMI);
1050 transferMIFlag(&MI, BuiltMI, MachineInstr::NoSWrap);
1054 if ((Opcode == SystemZ::ALFI && OpNum == 0 &&
1055 isInt<8>((int32_t)MI.getOperand(2).getImm())) ||
1056 (Opcode == SystemZ::ALGFI && OpNum == 0 &&
1057 isInt<8>((int64_t)MI.getOperand(2).getImm()))) {
1058 // AL(G)FI %reg, CONST -> AL(G)SI %mem, CONST
1059 Opcode = (Opcode == SystemZ::ALFI ? SystemZ::ALSI : SystemZ::ALGSI);
1060 MachineInstr *BuiltMI =
1061 BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(), get(Opcode))
1062 .addFrameIndex(FrameIndex)
1064 .addImm((int8_t)MI.getOperand(2).getImm());
1065 transferDeadCC(&MI, BuiltMI);
1069 if ((Opcode == SystemZ::SLFI && OpNum == 0 &&
1070 isInt<8>((int32_t)-MI.getOperand(2).getImm())) ||
1071 (Opcode == SystemZ::SLGFI && OpNum == 0 &&
1072 isInt<8>((int64_t)-MI.getOperand(2).getImm()))) {
1073 // SL(G)FI %reg, CONST -> AL(G)SI %mem, -CONST
1074 Opcode = (Opcode == SystemZ::SLFI ? SystemZ::ALSI : SystemZ::ALGSI);
1075 MachineInstr *BuiltMI =
1076 BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(), get(Opcode))
1077 .addFrameIndex(FrameIndex)
1079 .addImm((int8_t)-MI.getOperand(2).getImm());
1080 transferDeadCC(&MI, BuiltMI);
1084 unsigned MemImmOpc = 0;
1086 case SystemZ::LHIMux:
1087 case SystemZ::LHI: MemImmOpc = SystemZ::MVHI; break;
1088 case SystemZ::LGHI: MemImmOpc = SystemZ::MVGHI; break;
1089 case SystemZ::CHIMux:
1090 case SystemZ::CHI: MemImmOpc = SystemZ::CHSI; break;
1091 case SystemZ::CGHI: MemImmOpc = SystemZ::CGHSI; break;
1092 case SystemZ::CLFIMux:
1094 if (isUInt<16>(MI.getOperand(1).getImm()))
1095 MemImmOpc = SystemZ::CLFHSI;
1097 case SystemZ::CLGFI:
1098 if (isUInt<16>(MI.getOperand(1).getImm()))
1099 MemImmOpc = SystemZ::CLGHSI;
1104 return BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(),
1106 .addFrameIndex(FrameIndex)
1108 .addImm(MI.getOperand(1).getImm());
1110 if (Opcode == SystemZ::LGDR || Opcode == SystemZ::LDGR) {
1111 bool Op0IsGPR = (Opcode == SystemZ::LGDR);
1112 bool Op1IsGPR = (Opcode == SystemZ::LDGR);
1113 // If we're spilling the destination of an LDGR or LGDR, store the
1114 // source register instead.
1116 unsigned StoreOpcode = Op1IsGPR ? SystemZ::STG : SystemZ::STD;
1117 return BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(),
1119 .add(MI.getOperand(1))
1120 .addFrameIndex(FrameIndex)
1124 // If we're spilling the source of an LDGR or LGDR, load the
1125 // destination register instead.
1127 unsigned LoadOpcode = Op0IsGPR ? SystemZ::LG : SystemZ::LD;
1128 return BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(),
1130 .add(MI.getOperand(0))
1131 .addFrameIndex(FrameIndex)
1137 // Look for cases where the source of a simple store or the destination
1138 // of a simple load is being spilled. Try to use MVC instead.
1140 // Although MVC is in practice a fast choice in these cases, it is still
1141 // logically a bytewise copy. This means that we cannot use it if the
1142 // load or store is volatile. We also wouldn't be able to use MVC if
1143 // the two memories partially overlap, but that case cannot occur here,
1144 // because we know that one of the memories is a full frame index.
1146 // For performance reasons, we also want to avoid using MVC if the addresses
1147 // might be equal. We don't worry about that case here, because spill slot
1148 // coloring happens later, and because we have special code to remove
1149 // MVCs that turn out to be redundant.
1150 if (OpNum == 0 && MI.hasOneMemOperand()) {
1151 MachineMemOperand *MMO = *MI.memoperands_begin();
1152 if (MMO->getSize() == Size && !MMO->isVolatile() && !MMO->isAtomic()) {
1153 // Handle conversion of loads.
1154 if (isSimpleBD12Move(&MI, SystemZII::SimpleBDXLoad)) {
1155 return BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(),
1157 .addFrameIndex(FrameIndex)
1160 .add(MI.getOperand(1))
1161 .addImm(MI.getOperand(2).getImm())
1162 .addMemOperand(MMO);
1164 // Handle conversion of stores.
1165 if (isSimpleBD12Move(&MI, SystemZII::SimpleBDXStore)) {
1166 return BuildMI(*InsertPt->getParent(), InsertPt, MI.getDebugLoc(),
1168 .add(MI.getOperand(1))
1169 .addImm(MI.getOperand(2).getImm())
1171 .addFrameIndex(FrameIndex)
1173 .addMemOperand(MMO);
1178 // If the spilled operand is the final one or the instruction is
1179 // commutable, try to change <INSN>R into <INSN>. Don't introduce a def of
1180 // CC if it is live and MI does not define it.
1181 unsigned NumOps = MI.getNumExplicitOperands();
1182 int MemOpcode = SystemZ::getMemOpcode(Opcode);
1183 if (MemOpcode == -1 ||
1184 (CCLiveAtMI && !MI.definesRegister(SystemZ::CC) &&
1185 get(MemOpcode).hasImplicitDefOfPhysReg(SystemZ::CC)))
1188 // Check if all other vregs have a usable allocation in the case of vector
1189 // to FP conversion.
1190 const MCInstrDesc &MCID = MI.getDesc();
1191 for (unsigned I = 0, E = MCID.getNumOperands(); I != E; ++I) {
1192 const MCOperandInfo &MCOI = MCID.OpInfo[I];
1193 if (MCOI.OperandType != MCOI::OPERAND_REGISTER || I == OpNum)
1195 const TargetRegisterClass *RC = TRI->getRegClass(MCOI.RegClass);
1196 if (RC == &SystemZ::VR32BitRegClass || RC == &SystemZ::VR64BitRegClass) {
1197 Register Reg = MI.getOperand(I).getReg();
1198 Register PhysReg = Register::isVirtualRegister(Reg)
1199 ? (VRM ? VRM->getPhys(Reg) : Register())
1202 !(SystemZ::FP32BitRegClass.contains(PhysReg) ||
1203 SystemZ::FP64BitRegClass.contains(PhysReg) ||
1204 SystemZ::VF128BitRegClass.contains(PhysReg)))
1208 // Fused multiply and add/sub need to have the same dst and accumulator reg.
1209 bool FusedFPOp = (Opcode == SystemZ::WFMADB || Opcode == SystemZ::WFMASB ||
1210 Opcode == SystemZ::WFMSDB || Opcode == SystemZ::WFMSSB);
1212 Register DstReg = VRM->getPhys(MI.getOperand(0).getReg());
1213 Register AccReg = VRM->getPhys(MI.getOperand(3).getReg());
1214 if (OpNum == 0 || OpNum == 3 || DstReg != AccReg)
1218 // Try to swap compare operands if possible.
1219 bool NeedsCommute = false;
1220 if ((MI.getOpcode() == SystemZ::CR || MI.getOpcode() == SystemZ::CGR ||
1221 MI.getOpcode() == SystemZ::CLR || MI.getOpcode() == SystemZ::CLGR ||
1222 MI.getOpcode() == SystemZ::WFCDB || MI.getOpcode() == SystemZ::WFCSB ||
1223 MI.getOpcode() == SystemZ::WFKDB || MI.getOpcode() == SystemZ::WFKSB) &&
1224 OpNum == 0 && prepareCompareSwapOperands(MI))
1225 NeedsCommute = true;
1227 bool CCOperands = false;
1228 if (MI.getOpcode() == SystemZ::LOCRMux || MI.getOpcode() == SystemZ::LOCGR ||
1229 MI.getOpcode() == SystemZ::SELRMux || MI.getOpcode() == SystemZ::SELGR) {
1230 assert(MI.getNumOperands() == 6 && NumOps == 5 &&
1231 "LOCR/SELR instruction operands corrupt?");
1236 // See if this is a 3-address instruction that is convertible to 2-address
1237 // and suitable for folding below. Only try this with virtual registers
1238 // and a provided VRM (during regalloc).
1239 if (NumOps == 3 && SystemZ::getTargetMemOpcode(MemOpcode) != -1) {
1243 Register DstReg = MI.getOperand(0).getReg();
1245 (Register::isVirtualRegister(DstReg) ? VRM->getPhys(DstReg) : DstReg);
1246 Register SrcReg = (OpNum == 2 ? MI.getOperand(1).getReg()
1247 : ((OpNum == 1 && MI.isCommutable())
1248 ? MI.getOperand(2).getReg()
1250 if (DstPhys && !SystemZ::GRH32BitRegClass.contains(DstPhys) && SrcReg &&
1251 Register::isVirtualRegister(SrcReg) &&
1252 DstPhys == VRM->getPhys(SrcReg))
1253 NeedsCommute = (OpNum == 1);
1259 if ((OpNum == NumOps - 1) || NeedsCommute || FusedFPOp) {
1260 const MCInstrDesc &MemDesc = get(MemOpcode);
1261 uint64_t AccessBytes = SystemZII::getAccessSize(MemDesc.TSFlags);
1262 assert(AccessBytes != 0 && "Size of access should be known");
1263 assert(AccessBytes <= Size && "Access outside the frame index");
1264 uint64_t Offset = Size - AccessBytes;
1265 MachineInstrBuilder MIB = BuildMI(*InsertPt->getParent(), InsertPt,
1266 MI.getDebugLoc(), get(MemOpcode));
1267 if (MI.isCompare()) {
1268 assert(NumOps == 2 && "Expected 2 register operands for a compare.");
1269 MIB.add(MI.getOperand(NeedsCommute ? 1 : 0));
1271 else if (FusedFPOp) {
1272 MIB.add(MI.getOperand(0));
1273 MIB.add(MI.getOperand(3));
1274 MIB.add(MI.getOperand(OpNum == 1 ? 2 : 1));
1277 MIB.add(MI.getOperand(0));
1279 MIB.add(MI.getOperand(2));
1281 for (unsigned I = 1; I < OpNum; ++I)
1282 MIB.add(MI.getOperand(I));
1284 MIB.addFrameIndex(FrameIndex).addImm(Offset);
1285 if (MemDesc.TSFlags & SystemZII::HasIndex)
1288 unsigned CCValid = MI.getOperand(NumOps).getImm();
1289 unsigned CCMask = MI.getOperand(NumOps + 1).getImm();
1290 MIB.addImm(CCValid);
1291 MIB.addImm(NeedsCommute ? CCMask ^ CCValid : CCMask);
1293 if (MIB->definesRegister(SystemZ::CC) &&
1294 (!MI.definesRegister(SystemZ::CC) ||
1295 MI.registerDefIsDead(SystemZ::CC))) {
1296 MIB->addRegisterDead(SystemZ::CC, TRI);
1298 CCLiveRange->createDeadDef(MISlot, LIS->getVNInfoAllocator());
1300 // Constrain the register classes if converted from a vector opcode. The
1301 // allocated regs are in an FP reg-class per previous check above.
1302 for (const MachineOperand &MO : MIB->operands())
1303 if (MO.isReg() && Register::isVirtualRegister(MO.getReg())) {
1304 unsigned Reg = MO.getReg();
1305 if (MRI.getRegClass(Reg) == &SystemZ::VR32BitRegClass)
1306 MRI.setRegClass(Reg, &SystemZ::FP32BitRegClass);
1307 else if (MRI.getRegClass(Reg) == &SystemZ::VR64BitRegClass)
1308 MRI.setRegClass(Reg, &SystemZ::FP64BitRegClass);
1309 else if (MRI.getRegClass(Reg) == &SystemZ::VR128BitRegClass)
1310 MRI.setRegClass(Reg, &SystemZ::VF128BitRegClass);
1313 transferDeadCC(&MI, MIB);
1314 transferMIFlag(&MI, MIB, MachineInstr::NoSWrap);
1315 transferMIFlag(&MI, MIB, MachineInstr::NoFPExcept);
1322 MachineInstr *SystemZInstrInfo::foldMemoryOperandImpl(
1323 MachineFunction &MF, MachineInstr &MI, ArrayRef<unsigned> Ops,
1324 MachineBasicBlock::iterator InsertPt, MachineInstr &LoadMI,
1325 LiveIntervals *LIS) const {
1329 bool SystemZInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
1330 switch (MI.getOpcode()) {
1332 splitMove(MI, SystemZ::LG);
1335 case SystemZ::ST128:
1336 splitMove(MI, SystemZ::STG);
1340 splitMove(MI, SystemZ::LD);
1344 splitMove(MI, SystemZ::STD);
1347 case SystemZ::LBMux:
1348 expandRXYPseudo(MI, SystemZ::LB, SystemZ::LBH);
1351 case SystemZ::LHMux:
1352 expandRXYPseudo(MI, SystemZ::LH, SystemZ::LHH);
1355 case SystemZ::LLCRMux:
1356 expandZExtPseudo(MI, SystemZ::LLCR, 8);
1359 case SystemZ::LLHRMux:
1360 expandZExtPseudo(MI, SystemZ::LLHR, 16);
1363 case SystemZ::LLCMux:
1364 expandRXYPseudo(MI, SystemZ::LLC, SystemZ::LLCH);
1367 case SystemZ::LLHMux:
1368 expandRXYPseudo(MI, SystemZ::LLH, SystemZ::LLHH);
1372 expandRXYPseudo(MI, SystemZ::L, SystemZ::LFH);
1375 case SystemZ::LOCMux:
1376 expandLOCPseudo(MI, SystemZ::LOC, SystemZ::LOCFH);
1379 case SystemZ::LOCHIMux:
1380 expandLOCPseudo(MI, SystemZ::LOCHI, SystemZ::LOCHHI);
1383 case SystemZ::STCMux:
1384 expandRXYPseudo(MI, SystemZ::STC, SystemZ::STCH);
1387 case SystemZ::STHMux:
1388 expandRXYPseudo(MI, SystemZ::STH, SystemZ::STHH);
1391 case SystemZ::STMux:
1392 expandRXYPseudo(MI, SystemZ::ST, SystemZ::STFH);
1395 case SystemZ::STOCMux:
1396 expandLOCPseudo(MI, SystemZ::STOC, SystemZ::STOCFH);
1399 case SystemZ::LHIMux:
1400 expandRIPseudo(MI, SystemZ::LHI, SystemZ::IIHF, true);
1403 case SystemZ::IIFMux:
1404 expandRIPseudo(MI, SystemZ::IILF, SystemZ::IIHF, false);
1407 case SystemZ::IILMux:
1408 expandRIPseudo(MI, SystemZ::IILL, SystemZ::IIHL, false);
1411 case SystemZ::IIHMux:
1412 expandRIPseudo(MI, SystemZ::IILH, SystemZ::IIHH, false);
1415 case SystemZ::NIFMux:
1416 expandRIPseudo(MI, SystemZ::NILF, SystemZ::NIHF, false);
1419 case SystemZ::NILMux:
1420 expandRIPseudo(MI, SystemZ::NILL, SystemZ::NIHL, false);
1423 case SystemZ::NIHMux:
1424 expandRIPseudo(MI, SystemZ::NILH, SystemZ::NIHH, false);
1427 case SystemZ::OIFMux:
1428 expandRIPseudo(MI, SystemZ::OILF, SystemZ::OIHF, false);
1431 case SystemZ::OILMux:
1432 expandRIPseudo(MI, SystemZ::OILL, SystemZ::OIHL, false);
1435 case SystemZ::OIHMux:
1436 expandRIPseudo(MI, SystemZ::OILH, SystemZ::OIHH, false);
1439 case SystemZ::XIFMux:
1440 expandRIPseudo(MI, SystemZ::XILF, SystemZ::XIHF, false);
1443 case SystemZ::TMLMux:
1444 expandRIPseudo(MI, SystemZ::TMLL, SystemZ::TMHL, false);
1447 case SystemZ::TMHMux:
1448 expandRIPseudo(MI, SystemZ::TMLH, SystemZ::TMHH, false);
1451 case SystemZ::AHIMux:
1452 expandRIPseudo(MI, SystemZ::AHI, SystemZ::AIH, false);
1455 case SystemZ::AHIMuxK:
1456 expandRIEPseudo(MI, SystemZ::AHI, SystemZ::AHIK, SystemZ::AIH);
1459 case SystemZ::AFIMux:
1460 expandRIPseudo(MI, SystemZ::AFI, SystemZ::AIH, false);
1463 case SystemZ::CHIMux:
1464 expandRIPseudo(MI, SystemZ::CHI, SystemZ::CIH, false);
1467 case SystemZ::CFIMux:
1468 expandRIPseudo(MI, SystemZ::CFI, SystemZ::CIH, false);
1471 case SystemZ::CLFIMux:
1472 expandRIPseudo(MI, SystemZ::CLFI, SystemZ::CLIH, false);
1476 expandRXYPseudo(MI, SystemZ::C, SystemZ::CHF);
1479 case SystemZ::CLMux:
1480 expandRXYPseudo(MI, SystemZ::CL, SystemZ::CLHF);
1483 case SystemZ::RISBMux: {
1484 bool DestIsHigh = SystemZ::isHighReg(MI.getOperand(0).getReg());
1485 bool SrcIsHigh = SystemZ::isHighReg(MI.getOperand(2).getReg());
1486 if (SrcIsHigh == DestIsHigh)
1487 MI.setDesc(get(DestIsHigh ? SystemZ::RISBHH : SystemZ::RISBLL));
1489 MI.setDesc(get(DestIsHigh ? SystemZ::RISBHL : SystemZ::RISBLH));
1490 MI.getOperand(5).setImm(MI.getOperand(5).getImm() ^ 32);
1495 case SystemZ::ADJDYNALLOC:
1496 splitAdjDynAlloc(MI);
1499 case TargetOpcode::LOAD_STACK_GUARD:
1500 expandLoadStackGuard(&MI);
1508 unsigned SystemZInstrInfo::getInstSizeInBytes(const MachineInstr &MI) const {
1509 if (MI.isInlineAsm()) {
1510 const MachineFunction *MF = MI.getParent()->getParent();
1511 const char *AsmStr = MI.getOperand(0).getSymbolName();
1512 return getInlineAsmLength(AsmStr, *MF->getTarget().getMCAsmInfo());
1514 return MI.getDesc().getSize();
1518 SystemZInstrInfo::getBranchInfo(const MachineInstr &MI) const {
1519 switch (MI.getOpcode()) {
1524 return SystemZII::Branch(SystemZII::BranchNormal, SystemZ::CCMASK_ANY,
1525 SystemZ::CCMASK_ANY, &MI.getOperand(0));
1529 return SystemZII::Branch(SystemZII::BranchNormal, MI.getOperand(0).getImm(),
1530 MI.getOperand(1).getImm(), &MI.getOperand(2));
1533 case SystemZ::BRCTH:
1534 return SystemZII::Branch(SystemZII::BranchCT, SystemZ::CCMASK_ICMP,
1535 SystemZ::CCMASK_CMP_NE, &MI.getOperand(2));
1537 case SystemZ::BRCTG:
1538 return SystemZII::Branch(SystemZII::BranchCTG, SystemZ::CCMASK_ICMP,
1539 SystemZ::CCMASK_CMP_NE, &MI.getOperand(2));
1543 return SystemZII::Branch(SystemZII::BranchC, SystemZ::CCMASK_ICMP,
1544 MI.getOperand(2).getImm(), &MI.getOperand(3));
1548 return SystemZII::Branch(SystemZII::BranchCL, SystemZ::CCMASK_ICMP,
1549 MI.getOperand(2).getImm(), &MI.getOperand(3));
1553 return SystemZII::Branch(SystemZII::BranchCG, SystemZ::CCMASK_ICMP,
1554 MI.getOperand(2).getImm(), &MI.getOperand(3));
1556 case SystemZ::CLGIJ:
1557 case SystemZ::CLGRJ:
1558 return SystemZII::Branch(SystemZII::BranchCLG, SystemZ::CCMASK_ICMP,
1559 MI.getOperand(2).getImm(), &MI.getOperand(3));
1561 case SystemZ::INLINEASM_BR:
1562 // Don't try to analyze asm goto, so pass nullptr as branch target argument.
1563 return SystemZII::Branch(SystemZII::AsmGoto, 0, 0, nullptr);
1566 llvm_unreachable("Unrecognized branch opcode");
1570 void SystemZInstrInfo::getLoadStoreOpcodes(const TargetRegisterClass *RC,
1571 unsigned &LoadOpcode,
1572 unsigned &StoreOpcode) const {
1573 if (RC == &SystemZ::GR32BitRegClass || RC == &SystemZ::ADDR32BitRegClass) {
1574 LoadOpcode = SystemZ::L;
1575 StoreOpcode = SystemZ::ST;
1576 } else if (RC == &SystemZ::GRH32BitRegClass) {
1577 LoadOpcode = SystemZ::LFH;
1578 StoreOpcode = SystemZ::STFH;
1579 } else if (RC == &SystemZ::GRX32BitRegClass) {
1580 LoadOpcode = SystemZ::LMux;
1581 StoreOpcode = SystemZ::STMux;
1582 } else if (RC == &SystemZ::GR64BitRegClass ||
1583 RC == &SystemZ::ADDR64BitRegClass) {
1584 LoadOpcode = SystemZ::LG;
1585 StoreOpcode = SystemZ::STG;
1586 } else if (RC == &SystemZ::GR128BitRegClass ||
1587 RC == &SystemZ::ADDR128BitRegClass) {
1588 LoadOpcode = SystemZ::L128;
1589 StoreOpcode = SystemZ::ST128;
1590 } else if (RC == &SystemZ::FP32BitRegClass) {
1591 LoadOpcode = SystemZ::LE;
1592 StoreOpcode = SystemZ::STE;
1593 } else if (RC == &SystemZ::FP64BitRegClass) {
1594 LoadOpcode = SystemZ::LD;
1595 StoreOpcode = SystemZ::STD;
1596 } else if (RC == &SystemZ::FP128BitRegClass) {
1597 LoadOpcode = SystemZ::LX;
1598 StoreOpcode = SystemZ::STX;
1599 } else if (RC == &SystemZ::VR32BitRegClass) {
1600 LoadOpcode = SystemZ::VL32;
1601 StoreOpcode = SystemZ::VST32;
1602 } else if (RC == &SystemZ::VR64BitRegClass) {
1603 LoadOpcode = SystemZ::VL64;
1604 StoreOpcode = SystemZ::VST64;
1605 } else if (RC == &SystemZ::VF128BitRegClass ||
1606 RC == &SystemZ::VR128BitRegClass) {
1607 LoadOpcode = SystemZ::VL;
1608 StoreOpcode = SystemZ::VST;
1610 llvm_unreachable("Unsupported regclass to load or store");
1613 unsigned SystemZInstrInfo::getOpcodeForOffset(unsigned Opcode,
1614 int64_t Offset) const {
1615 const MCInstrDesc &MCID = get(Opcode);
1616 int64_t Offset2 = (MCID.TSFlags & SystemZII::Is128Bit ? Offset + 8 : Offset);
1617 if (isUInt<12>(Offset) && isUInt<12>(Offset2)) {
1618 // Get the instruction to use for unsigned 12-bit displacements.
1619 int Disp12Opcode = SystemZ::getDisp12Opcode(Opcode);
1620 if (Disp12Opcode >= 0)
1621 return Disp12Opcode;
1623 // All address-related instructions can use unsigned 12-bit
1627 if (isInt<20>(Offset) && isInt<20>(Offset2)) {
1628 // Get the instruction to use for signed 20-bit displacements.
1629 int Disp20Opcode = SystemZ::getDisp20Opcode(Opcode);
1630 if (Disp20Opcode >= 0)
1631 return Disp20Opcode;
1633 // Check whether Opcode allows signed 20-bit displacements.
1634 if (MCID.TSFlags & SystemZII::Has20BitOffset)
1640 unsigned SystemZInstrInfo::getLoadAndTest(unsigned Opcode) const {
1642 case SystemZ::L: return SystemZ::LT;
1643 case SystemZ::LY: return SystemZ::LT;
1644 case SystemZ::LG: return SystemZ::LTG;
1645 case SystemZ::LGF: return SystemZ::LTGF;
1646 case SystemZ::LR: return SystemZ::LTR;
1647 case SystemZ::LGFR: return SystemZ::LTGFR;
1648 case SystemZ::LGR: return SystemZ::LTGR;
1649 case SystemZ::LER: return SystemZ::LTEBR;
1650 case SystemZ::LDR: return SystemZ::LTDBR;
1651 case SystemZ::LXR: return SystemZ::LTXBR;
1652 case SystemZ::LCDFR: return SystemZ::LCDBR;
1653 case SystemZ::LPDFR: return SystemZ::LPDBR;
1654 case SystemZ::LNDFR: return SystemZ::LNDBR;
1655 case SystemZ::LCDFR_32: return SystemZ::LCEBR;
1656 case SystemZ::LPDFR_32: return SystemZ::LPEBR;
1657 case SystemZ::LNDFR_32: return SystemZ::LNEBR;
1658 // On zEC12 we prefer to use RISBGN. But if there is a chance to
1659 // actually use the condition code, we may turn it back into RISGB.
1660 // Note that RISBG is not really a "load-and-test" instruction,
1661 // but sets the same condition code values, so is OK to use here.
1662 case SystemZ::RISBGN: return SystemZ::RISBG;
1667 // Return true if Mask matches the regexp 0*1+0*, given that zero masks
1668 // have already been filtered out. Store the first set bit in LSB and
1669 // the number of set bits in Length if so.
1670 static bool isStringOfOnes(uint64_t Mask, unsigned &LSB, unsigned &Length) {
1671 unsigned First = findFirstSet(Mask);
1672 uint64_t Top = (Mask >> First) + 1;
1673 if ((Top & -Top) == Top) {
1675 Length = findFirstSet(Top);
1681 bool SystemZInstrInfo::isRxSBGMask(uint64_t Mask, unsigned BitSize,
1682 unsigned &Start, unsigned &End) const {
1683 // Reject trivial all-zero masks.
1684 Mask &= allOnes(BitSize);
1688 // Handle the 1+0+ or 0+1+0* cases. Start then specifies the index of
1689 // the msb and End specifies the index of the lsb.
1690 unsigned LSB, Length;
1691 if (isStringOfOnes(Mask, LSB, Length)) {
1692 Start = 63 - (LSB + Length - 1);
1697 // Handle the wrap-around 1+0+1+ cases. Start then specifies the msb
1698 // of the low 1s and End specifies the lsb of the high 1s.
1699 if (isStringOfOnes(Mask ^ allOnes(BitSize), LSB, Length)) {
1700 assert(LSB > 0 && "Bottom bit must be set");
1701 assert(LSB + Length < BitSize && "Top bit must be set");
1702 Start = 63 - (LSB - 1);
1703 End = 63 - (LSB + Length);
1710 unsigned SystemZInstrInfo::getFusedCompare(unsigned Opcode,
1711 SystemZII::FusedCompareType Type,
1712 const MachineInstr *MI) const {
1716 if (!(MI && isInt<8>(MI->getOperand(1).getImm())))
1720 case SystemZ::CLGFI:
1721 if (!(MI && isUInt<8>(MI->getOperand(1).getImm())))
1726 if (!STI.hasMiscellaneousExtensions())
1728 if (!(MI && MI->getOperand(3).getReg() == 0))
1733 case SystemZII::CompareAndBranch:
1736 return SystemZ::CRJ;
1738 return SystemZ::CGRJ;
1740 return SystemZ::CIJ;
1742 return SystemZ::CGIJ;
1744 return SystemZ::CLRJ;
1746 return SystemZ::CLGRJ;
1748 return SystemZ::CLIJ;
1749 case SystemZ::CLGFI:
1750 return SystemZ::CLGIJ;
1754 case SystemZII::CompareAndReturn:
1757 return SystemZ::CRBReturn;
1759 return SystemZ::CGRBReturn;
1761 return SystemZ::CIBReturn;
1763 return SystemZ::CGIBReturn;
1765 return SystemZ::CLRBReturn;
1767 return SystemZ::CLGRBReturn;
1769 return SystemZ::CLIBReturn;
1770 case SystemZ::CLGFI:
1771 return SystemZ::CLGIBReturn;
1775 case SystemZII::CompareAndSibcall:
1778 return SystemZ::CRBCall;
1780 return SystemZ::CGRBCall;
1782 return SystemZ::CIBCall;
1784 return SystemZ::CGIBCall;
1786 return SystemZ::CLRBCall;
1788 return SystemZ::CLGRBCall;
1790 return SystemZ::CLIBCall;
1791 case SystemZ::CLGFI:
1792 return SystemZ::CLGIBCall;
1796 case SystemZII::CompareAndTrap:
1799 return SystemZ::CRT;
1801 return SystemZ::CGRT;
1803 return SystemZ::CIT;
1805 return SystemZ::CGIT;
1807 return SystemZ::CLRT;
1809 return SystemZ::CLGRT;
1811 return SystemZ::CLFIT;
1812 case SystemZ::CLGFI:
1813 return SystemZ::CLGIT;
1815 return SystemZ::CLT;
1817 return SystemZ::CLGT;
1825 bool SystemZInstrInfo::
1826 prepareCompareSwapOperands(MachineBasicBlock::iterator const MBBI) const {
1827 assert(MBBI->isCompare() && MBBI->getOperand(0).isReg() &&
1828 MBBI->getOperand(1).isReg() && !MBBI->mayLoad() &&
1829 "Not a compare reg/reg.");
1831 MachineBasicBlock *MBB = MBBI->getParent();
1833 SmallVector<MachineInstr *, 4> CCUsers;
1834 for (MachineBasicBlock::iterator Itr = std::next(MBBI);
1835 Itr != MBB->end(); ++Itr) {
1836 if (Itr->readsRegister(SystemZ::CC)) {
1837 unsigned Flags = Itr->getDesc().TSFlags;
1838 if ((Flags & SystemZII::CCMaskFirst) || (Flags & SystemZII::CCMaskLast))
1839 CCUsers.push_back(&*Itr);
1843 if (Itr->definesRegister(SystemZ::CC)) {
1849 LivePhysRegs LiveRegs(*MBB->getParent()->getSubtarget().getRegisterInfo());
1850 LiveRegs.addLiveOuts(*MBB);
1851 if (LiveRegs.contains(SystemZ::CC))
1855 // Update all CC users.
1856 for (unsigned Idx = 0; Idx < CCUsers.size(); ++Idx) {
1857 unsigned Flags = CCUsers[Idx]->getDesc().TSFlags;
1858 unsigned FirstOpNum = ((Flags & SystemZII::CCMaskFirst) ?
1859 0 : CCUsers[Idx]->getNumExplicitOperands() - 2);
1860 MachineOperand &CCMaskMO = CCUsers[Idx]->getOperand(FirstOpNum + 1);
1861 unsigned NewCCMask = SystemZ::reverseCCMask(CCMaskMO.getImm());
1862 CCMaskMO.setImm(NewCCMask);
1868 unsigned SystemZ::reverseCCMask(unsigned CCMask) {
1869 return ((CCMask & SystemZ::CCMASK_CMP_EQ) |
1870 (CCMask & SystemZ::CCMASK_CMP_GT ? SystemZ::CCMASK_CMP_LT : 0) |
1871 (CCMask & SystemZ::CCMASK_CMP_LT ? SystemZ::CCMASK_CMP_GT : 0) |
1872 (CCMask & SystemZ::CCMASK_CMP_UO));
1875 MachineBasicBlock *SystemZ::emitBlockAfter(MachineBasicBlock *MBB) {
1876 MachineFunction &MF = *MBB->getParent();
1877 MachineBasicBlock *NewMBB = MF.CreateMachineBasicBlock(MBB->getBasicBlock());
1878 MF.insert(std::next(MachineFunction::iterator(MBB)), NewMBB);
1882 MachineBasicBlock *SystemZ::splitBlockAfter(MachineBasicBlock::iterator MI,
1883 MachineBasicBlock *MBB) {
1884 MachineBasicBlock *NewMBB = emitBlockAfter(MBB);
1885 NewMBB->splice(NewMBB->begin(), MBB,
1886 std::next(MachineBasicBlock::iterator(MI)), MBB->end());
1887 NewMBB->transferSuccessorsAndUpdatePHIs(MBB);
1891 MachineBasicBlock *SystemZ::splitBlockBefore(MachineBasicBlock::iterator MI,
1892 MachineBasicBlock *MBB) {
1893 MachineBasicBlock *NewMBB = emitBlockAfter(MBB);
1894 NewMBB->splice(NewMBB->begin(), MBB, MI, MBB->end());
1895 NewMBB->transferSuccessorsAndUpdatePHIs(MBB);
1899 unsigned SystemZInstrInfo::getLoadAndTrap(unsigned Opcode) const {
1900 if (!STI.hasLoadAndTrap())
1905 return SystemZ::LAT;
1907 return SystemZ::LGAT;
1909 return SystemZ::LFHAT;
1911 return SystemZ::LLGFAT;
1913 return SystemZ::LLGTAT;
1918 void SystemZInstrInfo::loadImmediate(MachineBasicBlock &MBB,
1919 MachineBasicBlock::iterator MBBI,
1920 unsigned Reg, uint64_t Value) const {
1921 DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
1923 if (isInt<16>(Value))
1924 Opcode = SystemZ::LGHI;
1925 else if (SystemZ::isImmLL(Value))
1926 Opcode = SystemZ::LLILL;
1927 else if (SystemZ::isImmLH(Value)) {
1928 Opcode = SystemZ::LLILH;
1931 assert(isInt<32>(Value) && "Huge values not handled yet");
1932 Opcode = SystemZ::LGFI;
1934 BuildMI(MBB, MBBI, DL, get(Opcode), Reg).addImm(Value);
1937 bool SystemZInstrInfo::verifyInstruction(const MachineInstr &MI,
1938 StringRef &ErrInfo) const {
1939 const MCInstrDesc &MCID = MI.getDesc();
1940 for (unsigned I = 0, E = MI.getNumOperands(); I != E; ++I) {
1941 if (I >= MCID.getNumOperands())
1943 const MachineOperand &Op = MI.getOperand(I);
1944 const MCOperandInfo &MCOI = MCID.OpInfo[I];
1945 // Addressing modes have register and immediate operands. Op should be a
1946 // register (or frame index) operand if MCOI.RegClass contains a valid
1947 // register class, or an immediate otherwise.
1948 if (MCOI.OperandType == MCOI::OPERAND_MEMORY &&
1949 ((MCOI.RegClass != -1 && !Op.isReg() && !Op.isFI()) ||
1950 (MCOI.RegClass == -1 && !Op.isImm()))) {
1951 ErrInfo = "Addressing mode operands corrupt!";
1959 bool SystemZInstrInfo::
1960 areMemAccessesTriviallyDisjoint(const MachineInstr &MIa,
1961 const MachineInstr &MIb) const {
1963 if (!MIa.hasOneMemOperand() || !MIb.hasOneMemOperand())
1966 // If mem-operands show that the same address Value is used by both
1967 // instructions, check for non-overlapping offsets and widths. Not
1968 // sure if a register based analysis would be an improvement...
1970 MachineMemOperand *MMOa = *MIa.memoperands_begin();
1971 MachineMemOperand *MMOb = *MIb.memoperands_begin();
1972 const Value *VALa = MMOa->getValue();
1973 const Value *VALb = MMOb->getValue();
1974 bool SameVal = (VALa && VALb && (VALa == VALb));
1976 const PseudoSourceValue *PSVa = MMOa->getPseudoValue();
1977 const PseudoSourceValue *PSVb = MMOb->getPseudoValue();
1978 if (PSVa && PSVb && (PSVa == PSVb))
1982 int OffsetA = MMOa->getOffset(), OffsetB = MMOb->getOffset();
1983 int WidthA = MMOa->getSize(), WidthB = MMOb->getSize();
1984 int LowOffset = OffsetA < OffsetB ? OffsetA : OffsetB;
1985 int HighOffset = OffsetA < OffsetB ? OffsetB : OffsetA;
1986 int LowWidth = (LowOffset == OffsetA) ? WidthA : WidthB;
1987 if (LowOffset + LowWidth <= HighOffset)