#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
void visitMachineBasicBlockAfter(const MachineBasicBlock *MBB);
void visitMachineFunctionAfter();
+ template <typename T> void report(const char *msg, ilist_iterator<T> I) {
+ report(msg, &*I);
+ }
void report(const char *msg, const MachineFunction *MF);
void report(const char *msg, const MachineBasicBlock *MBB);
void report(const char *msg, const MachineInstr *MI);
void report(const char *msg, const MachineBasicBlock *MBB,
const LiveInterval &LI);
void report(const char *msg, const MachineFunction *MF,
- const LiveRange &LR, unsigned Reg, unsigned LaneMask);
+ const LiveRange &LR, unsigned Reg, LaneBitmask LaneMask);
void report(const char *msg, const MachineBasicBlock *MBB,
- const LiveRange &LR, unsigned Reg, unsigned LaneMask);
+ const LiveRange &LR, unsigned Reg, LaneBitmask LaneMask);
void verifyInlineAsm(const MachineInstr *MI);
void verifyLiveRangeSegment(const LiveRange&,
const LiveRange::const_iterator I, unsigned,
unsigned);
- void verifyLiveRange(const LiveRange&, unsigned, unsigned LaneMask = 0);
+ void verifyLiveRange(const LiveRange&, unsigned, LaneBitmask LaneMask = 0);
void verifyStackFrame();
+
+ void verifySlotIndexes() const;
};
struct MachineVerifierPass : public MachineFunctionPass {
.runOnMachineFunction(const_cast<MachineFunction&>(*this));
}
+void MachineVerifier::verifySlotIndexes() const {
+ if (Indexes == nullptr)
+ return;
+
+ // Ensure the IdxMBB list is sorted by slot indexes.
+ SlotIndex Last;
+ for (SlotIndexes::MBBIndexIterator I = Indexes->MBBIndexBegin(),
+ E = Indexes->MBBIndexEnd(); I != E; ++I) {
+ assert(!Last.isValid() || I->first > Last);
+ Last = I->first;
+ }
+}
+
bool MachineVerifier::runOnMachineFunction(MachineFunction &MF) {
foundErrors = 0;
Indexes = PASS->getAnalysisIfAvailable<SlotIndexes>();
}
+ verifySlotIndexes();
+
visitMachineFunctionBefore();
for (MachineFunction::const_iterator MFI = MF.begin(), MFE = MF.end();
MFI!=MFE; ++MFI) {
- visitMachineBasicBlockBefore(MFI);
+ visitMachineBasicBlockBefore(&*MFI);
// Keep track of the current bundle header.
const MachineInstr *CurBundle = nullptr;
// Do we expect the next instruction to be part of the same bundle?
for (MachineBasicBlock::const_instr_iterator MBBI = MFI->instr_begin(),
MBBE = MFI->instr_end(); MBBI != MBBE; ++MBBI) {
- if (MBBI->getParent() != MFI) {
+ if (MBBI->getParent() != &*MFI) {
report("Bad instruction parent pointer", MFI);
errs() << "Instruction: " << *MBBI;
continue;
// Check for consistent bundle flags.
if (InBundle && !MBBI->isBundledWithPred())
report("Missing BundledPred flag, "
- "BundledSucc was set on predecessor", MBBI);
+ "BundledSucc was set on predecessor",
+ &*MBBI);
if (!InBundle && MBBI->isBundledWithPred())
report("BundledPred flag is set, "
- "but BundledSucc not set on predecessor", MBBI);
+ "but BundledSucc not set on predecessor",
+ &*MBBI);
// Is this a bundle header?
if (!MBBI->isInsideBundle()) {
if (CurBundle)
visitMachineBundleAfter(CurBundle);
- CurBundle = MBBI;
+ CurBundle = &*MBBI;
visitMachineBundleBefore(CurBundle);
} else if (!CurBundle)
report("No bundle header", MBBI);
- visitMachineInstrBefore(MBBI);
- for (unsigned I = 0, E = MBBI->getNumOperands(); I != E; ++I)
- visitMachineOperand(&MBBI->getOperand(I), I);
- visitMachineInstrAfter(MBBI);
+ visitMachineInstrBefore(&*MBBI);
+ for (unsigned I = 0, E = MBBI->getNumOperands(); I != E; ++I) {
+ const MachineInstr &MI = *MBBI;
+ const MachineOperand &Op = MI.getOperand(I);
+ if (Op.getParent() != &MI) {
+ // Make sure to use correct addOperand / RemoveOperand / ChangeTo
+ // functions when replacing operands of a MachineInstr.
+ report("Instruction has operand with wrong parent set", &MI);
+ }
+
+ visitMachineOperand(&Op, I);
+ }
+
+ visitMachineInstrAfter(&*MBBI);
// Was this the last bundled instruction?
InBundle = MBBI->isBundledWithSucc();
visitMachineBundleAfter(CurBundle);
if (InBundle)
report("BundledSucc flag set on last instruction in block", &MFI->back());
- visitMachineBasicBlockAfter(MFI);
+ visitMachineBasicBlockAfter(&*MFI);
}
visitMachineFunctionAfter();
void MachineVerifier::report(const char *msg, const MachineBasicBlock *MBB,
const LiveRange &LR, unsigned Reg,
- unsigned LaneMask) {
+ LaneBitmask LaneMask) {
report(msg, MBB);
errs() << "- liverange: " << LR << '\n';
errs() << "- register: " << PrintReg(Reg, TRI) << '\n';
if (LaneMask != 0)
- errs() << "- lanemask: " << format("%04X\n", LaneMask);
+ errs() << "- lanemask: " << PrintLaneMask(LaneMask) << '\n';
}
void MachineVerifier::report(const char *msg, const MachineFunction *MF,
const LiveRange &LR, unsigned Reg,
- unsigned LaneMask) {
+ LaneBitmask LaneMask) {
report(msg, MF);
errs() << "- liverange: " << LR << '\n';
errs() << "- register: " << PrintReg(Reg, TRI) << '\n';
if (LaneMask != 0)
- errs() << "- lanemask: " << format("%04X\n", LaneMask);
+ errs() << "- lanemask: " << PrintLaneMask(LaneMask) << '\n';
}
void MachineVerifier::markReachable(const MachineBasicBlock *MBB) {
if (MRI->isSSA()) {
// If this block has allocatable physical registers live-in, check that
// it is an entry block or landing pad.
- for (MachineBasicBlock::livein_iterator LI = MBB->livein_begin(),
- LE = MBB->livein_end();
- LI != LE; ++LI) {
- unsigned reg = *LI;
- if (isAllocatable(reg) && !MBB->isLandingPad() &&
+ for (const auto &LI : MBB->liveins()) {
+ if (isAllocatable(LI.PhysReg) && !MBB->isEHPad() &&
MBB != MBB->getParent()->begin()) {
report("MBB has allocable live-in, but isn't entry or landing-pad.", MBB);
}
SmallPtrSet<MachineBasicBlock*, 4> LandingPadSuccs;
for (MachineBasicBlock::const_succ_iterator I = MBB->succ_begin(),
E = MBB->succ_end(); I != E; ++I) {
- if ((*I)->isLandingPad())
+ if ((*I)->isEHPad())
LandingPadSuccs.insert(*I);
if (!FunctionBlocks.count(*I))
report("MBB has successor that isn't part of the function.", MBB);
// check whether its answers match up with reality.
if (!TBB && !FBB) {
// Block falls through to its successor.
- MachineFunction::const_iterator MBBI = MBB;
+ MachineFunction::const_iterator MBBI = MBB->getIterator();
++MBBI;
if (MBBI == MF->end()) {
// It's possible that the block legitimately ends with a noreturn
} else if (MBB->succ_size() != 1+LandingPadSuccs.size()) {
report("MBB exits via unconditional fall-through but doesn't have "
"exactly one CFG successor!", MBB);
- } else if (!MBB->isSuccessor(MBBI)) {
+ } else if (!MBB->isSuccessor(&*MBBI)) {
report("MBB exits via unconditional fall-through but its successor "
"differs from its CFG successor!", MBB);
}
}
} else if (TBB && !FBB && !Cond.empty()) {
// Block conditionally branches somewhere, otherwise falls through.
- MachineFunction::const_iterator MBBI = MBB;
+ MachineFunction::const_iterator MBBI = MBB->getIterator();
++MBBI;
if (MBBI == MF->end()) {
report("MBB conditionally falls through out of function!", MBB);
} else if (MBB->succ_size() != 2) {
report("MBB exits via conditional branch/fall-through but doesn't have "
"exactly two CFG successors!", MBB);
- } else if (!matchPair(MBB->succ_begin(), TBB, MBBI)) {
+ } else if (!matchPair(MBB->succ_begin(), TBB, &*MBBI)) {
report("MBB exits via conditional branch/fall-through but the CFG "
"successors don't match the actual successors!", MBB);
}
}
regsLive.clear();
- for (MachineBasicBlock::livein_iterator I = MBB->livein_begin(),
- E = MBB->livein_end(); I != E; ++I) {
- if (!TargetRegisterInfo::isPhysicalRegister(*I)) {
+ for (const auto &LI : MBB->liveins()) {
+ if (!TargetRegisterInfo::isPhysicalRegister(LI.PhysReg)) {
report("MBB live-in list contains non-physical register", MBB);
continue;
}
- for (MCSubRegIterator SubRegs(*I, TRI, /*IncludeSelf=*/true);
+ for (MCSubRegIterator SubRegs(LI.PhysReg, TRI, /*IncludeSelf=*/true);
SubRegs.isValid(); ++SubRegs)
regsLive.insert(*SubRegs);
}
const MachineFrameInfo *MFI = MF->getFrameInfo();
assert(MFI && "Function has no frame info");
- BitVector PR = MFI->getPristineRegs(MBB);
+ BitVector PR = MFI->getPristineRegs(*MF);
for (int I = PR.find_first(); I>0; I = PR.find_next(I)) {
for (MCSubRegIterator SubRegs(I, TRI, /*IncludeSelf=*/true);
SubRegs.isValid(); ++SubRegs)
MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) {
const MachineInstr *MI = MO->getParent();
const MCInstrDesc &MCID = MI->getDesc();
+ unsigned NumDefs = MCID.getNumDefs();
+ if (MCID.getOpcode() == TargetOpcode::PATCHPOINT)
+ NumDefs = (MONum == 0 && MO->isReg()) ? NumDefs : 0;
// The first MCID.NumDefs operands must be explicit register defines
- if (MONum < MCID.getNumDefs()) {
+ if (MONum < NumDefs) {
const MCOperandInfo &MCOI = MCID.OpInfo[MONum];
if (!MO->isReg())
report("Explicit definition must be a register", MO, MONum);
case MachineOperand::MO_FrameIndex:
if (LiveStks && LiveStks->hasInterval(MO->getIndex()) &&
LiveInts && !LiveInts->isNotInMIMap(MI)) {
- LiveInterval &LI = LiveStks->getInterval(MO->getIndex());
+ int FI = MO->getIndex();
+ LiveInterval &LI = LiveStks->getInterval(FI);
SlotIndex Idx = LiveInts->getInstructionIndex(MI);
- if (MI->mayLoad() && !LI.liveAt(Idx.getRegSlot(true))) {
+
+ bool stores = MI->mayStore();
+ bool loads = MI->mayLoad();
+ // For a memory-to-memory move, we need to check if the frame
+ // index is used for storing or loading, by inspecting the
+ // memory operands.
+ if (stores && loads) {
+ for (auto *MMO : MI->memoperands()) {
+ const PseudoSourceValue *PSV = MMO->getPseudoValue();
+ if (PSV == nullptr) continue;
+ const FixedStackPseudoSourceValue *Value =
+ dyn_cast<FixedStackPseudoSourceValue>(PSV);
+ if (Value == nullptr) continue;
+ if (Value->getFrameIndex() != FI) continue;
+
+ if (MMO->isStore())
+ loads = false;
+ else
+ stores = false;
+ break;
+ }
+ if (loads == stores)
+ report("Missing fixed stack memoperand.", MI);
+ }
+ if (loads && !LI.liveAt(Idx.getRegSlot(true))) {
report("Instruction loads from dead spill slot", MO, MONum);
errs() << "Live stack: " << LI << '\n';
}
- if (MI->mayStore() && !LI.liveAt(Idx.getRegSlot())) {
+ if (stores && !LI.liveAt(Idx.getRegSlot())) {
report("Instruction stores to dead spill slot", MO, MONum);
errs() << "Live stack: " << LI << '\n';
}
void MachineVerifier::verifyLiveRangeValue(const LiveRange &LR,
const VNInfo *VNI, unsigned Reg,
- unsigned LaneMask) {
+ LaneBitmask LaneMask) {
if (VNI->isUnused())
return;
void MachineVerifier::verifyLiveRangeSegment(const LiveRange &LR,
const LiveRange::const_iterator I,
- unsigned Reg, unsigned LaneMask) {
+ unsigned Reg, LaneBitmask LaneMask)
+{
const LiveRange::Segment &S = *I;
const VNInfo *VNI = S.valno;
assert(VNI && "Live segment has no valno");
if (!hasRead) {
// When tracking subregister liveness, the main range must start new
// values on partial register writes, even if there is no read.
- if (!MRI->tracksSubRegLiveness() || LaneMask != 0 || !hasSubRegDef) {
+ if (!MRI->shouldTrackSubRegLiveness(Reg) || LaneMask != 0 ||
+ !hasSubRegDef) {
report("Instruction ending live segment doesn't read the register",
MI);
errs() << S << " in " << LR << '\n';
}
// Now check all the basic blocks in this live segment.
- MachineFunction::const_iterator MFI = MBB;
+ MachineFunction::const_iterator MFI = MBB->getIterator();
// Is this live segment the beginning of a non-PHIDef VN?
if (S.start == VNI->def && !VNI->isPHIDef()) {
// Not live-in to any blocks.
++MFI;
}
for (;;) {
- assert(LiveInts->isLiveInToMBB(LR, MFI));
+ assert(LiveInts->isLiveInToMBB(LR, &*MFI));
// We don't know how to track physregs into a landing pad.
if (!TargetRegisterInfo::isVirtualRegister(Reg) &&
- MFI->isLandingPad()) {
+ MFI->isEHPad()) {
if (&*MFI == EndMBB)
break;
++MFI;
// Is VNI a PHI-def in the current block?
bool IsPHI = VNI->isPHIDef() &&
- VNI->def == LiveInts->getMBBStartIdx(MFI);
+ VNI->def == LiveInts->getMBBStartIdx(&*MFI);
// Check that VNI is live-out of all predecessors.
for (MachineBasicBlock::const_pred_iterator PI = MFI->pred_begin(),
report("Register not marked live out of predecessor", *PI, LR, Reg,
LaneMask);
errs() << "Valno #" << VNI->id << " live into BB#" << MFI->getNumber()
- << '@' << LiveInts->getMBBStartIdx(MFI) << ", not live before "
- << PEnd << '\n';
+ << '@' << LiveInts->getMBBStartIdx(&*MFI) << ", not live before "
+ << PEnd << '\n';
continue;
}
report("Different value live out of predecessor", *PI, LR, Reg,
LaneMask);
errs() << "Valno #" << PVNI->id << " live out of BB#"
- << (*PI)->getNumber() << '@' << PEnd
- << "\nValno #" << VNI->id << " live into BB#" << MFI->getNumber()
- << '@' << LiveInts->getMBBStartIdx(MFI) << '\n';
+ << (*PI)->getNumber() << '@' << PEnd << "\nValno #" << VNI->id
+ << " live into BB#" << MFI->getNumber() << '@'
+ << LiveInts->getMBBStartIdx(&*MFI) << '\n';
}
}
if (&*MFI == EndMBB)
}
void MachineVerifier::verifyLiveRange(const LiveRange &LR, unsigned Reg,
- unsigned LaneMask) {
+ LaneBitmask LaneMask) {
for (const VNInfo *VNI : LR.valnos)
verifyLiveRangeValue(LR, VNI, Reg, LaneMask);
}
void MachineVerifier::verifyLiveInterval(const LiveInterval &LI) {
- verifyLiveRange(LI, LI.reg);
-
unsigned Reg = LI.reg;
- if (TargetRegisterInfo::isVirtualRegister(Reg)) {
- unsigned Mask = 0;
- unsigned MaxMask = MRI->getMaxLaneMaskForVReg(Reg);
- for (const LiveInterval::SubRange &SR : LI.subranges()) {
- if ((Mask & SR.LaneMask) != 0)
- report("Lane masks of sub ranges overlap in live interval", MF, LI);
- if ((SR.LaneMask & ~MaxMask) != 0)
- report("Subrange lanemask is invalid", MF, LI);
- Mask |= SR.LaneMask;
- verifyLiveRange(SR, LI.reg, SR.LaneMask);
- if (!LI.covers(SR))
- report("A Subrange is not covered by the main range", MF, LI);
- }
- } else if (LI.hasSubRanges()) {
- report("subregister liveness only allowed for virtual registers", MF, LI);
+ assert(TargetRegisterInfo::isVirtualRegister(Reg));
+ verifyLiveRange(LI, Reg);
+
+ LaneBitmask Mask = 0;
+ LaneBitmask MaxMask = MRI->getMaxLaneMaskForVReg(Reg);
+ for (const LiveInterval::SubRange &SR : LI.subranges()) {
+ if ((Mask & SR.LaneMask) != 0)
+ report("Lane masks of sub ranges overlap in live interval", MF, LI);
+ if ((SR.LaneMask & ~MaxMask) != 0)
+ report("Subrange lanemask is invalid", MF, LI);
+ if (SR.empty())
+ report("Subrange must not be empty", MF, SR, LI.reg, SR.LaneMask);
+ Mask |= SR.LaneMask;
+ verifyLiveRange(SR, LI.reg, SR.LaneMask);
+ if (!LI.covers(SR))
+ report("A Subrange is not covered by the main range", MF, LI);
}
// Check the LI only has one connected component.
- if (TargetRegisterInfo::isVirtualRegister(LI.reg)) {
- ConnectedVNInfoEqClasses ConEQ(*LiveInts);
- unsigned NumComp = ConEQ.Classify(&LI);
- if (NumComp > 1) {
- report("Multiple connected components in live interval", MF, LI);
- for (unsigned comp = 0; comp != NumComp; ++comp) {
- errs() << comp << ": valnos";
- for (LiveInterval::const_vni_iterator I = LI.vni_begin(),
- E = LI.vni_end(); I!=E; ++I)
- if (comp == ConEQ.getEqClass(*I))
- errs() << ' ' << (*I)->id;
- errs() << '\n';
- }
+ ConnectedVNInfoEqClasses ConEQ(*LiveInts);
+ unsigned NumComp = ConEQ.Classify(&LI);
+ if (NumComp > 1) {
+ report("Multiple connected components in live interval", MF, LI);
+ for (unsigned comp = 0; comp != NumComp; ++comp) {
+ errs() << comp << ": valnos";
+ for (LiveInterval::const_vni_iterator I = LI.vni_begin(),
+ E = LI.vni_end(); I!=E; ++I)
+ if (comp == ConEQ.getEqClass(*I))
+ errs() << ' ' << (*I)->id;
+ errs() << '\n';
}
}
}
/// by a FrameDestroy <n>, stack adjustments are identical on all
/// CFG edges to a merge point, and frame is destroyed at end of a return block.
void MachineVerifier::verifyStackFrame() {
- int FrameSetupOpcode = TII->getCallFrameSetupOpcode();
- int FrameDestroyOpcode = TII->getCallFrameDestroyOpcode();
+ unsigned FrameSetupOpcode = TII->getCallFrameSetupOpcode();
+ unsigned FrameDestroyOpcode = TII->getCallFrameDestroyOpcode();
SmallVector<StackStateOfBB, 8> SPState;
SPState.resize(MF->getNumBlockIDs());
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