// the verifier errors.
//===----------------------------------------------------------------------===//
-#include "llvm/Instructions.h"
-#include "llvm/Function.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/SetOperations.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/BasicBlock.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
-#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/LiveStackAnalysis.h"
-#include "llvm/CodeGen/MachineInstrBundle.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/Passes.h"
+#include "llvm/InlineAsm.h"
+#include "llvm/Instructions.h"
#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/SetOperations.h"
-#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
namespace {
typedef SmallVector<const uint32_t*, 4> RegMaskVector;
typedef DenseSet<unsigned> RegSet;
typedef DenseMap<unsigned, const MachineInstr*> RegMap;
+ typedef SmallPtrSet<const MachineBasicBlock*, 8> BlockSet;
const MachineInstr *FirstTerminator;
+ BlockSet FunctionBlocks;
BitVector regsReserved;
- BitVector regsAllocatable;
RegSet regsLive;
RegVector regsDefined, regsDead, regsKilled;
RegMaskVector regMasks;
// block. This set is disjoint from regsLiveOut.
RegSet vregsRequired;
+ // Set versions of block's predecessor and successor lists.
+ BlockSet Preds, Succs;
+
BBInfo() : reachable(false) {}
// Add register to vregsPassed if it belongs there. Return true if
}
bool isAllocatable(unsigned Reg) {
- return Reg < regsAllocatable.size() && regsAllocatable.test(Reg);
+ return Reg < TRI->getNumRegs() && MRI->isAllocatable(Reg);
}
// Analysis information if available
void report(const char *msg, const MachineBasicBlock *MBB);
void report(const char *msg, const MachineInstr *MI);
void report(const char *msg, const MachineOperand *MO, unsigned MONum);
+ void report(const char *msg, const MachineFunction *MF,
+ const LiveInterval &LI);
+ void report(const char *msg, const MachineBasicBlock *MBB,
+ const LiveInterval &LI);
+
+ void verifyInlineAsm(const MachineInstr *MI);
void checkLiveness(const MachineOperand *MO, unsigned MONum);
void markReachable(const MachineBasicBlock *MBB);
void calcRegsRequired();
void verifyLiveVariables();
void verifyLiveIntervals();
+ void verifyLiveInterval(const LiveInterval&);
+ void verifyLiveIntervalValue(const LiveInterval&, VNInfo*);
+ void verifyLiveIntervalSegment(const LiveInterval&,
+ LiveInterval::const_iterator);
};
struct MachineVerifierPass : public MachineFunctionPass {
visitMachineBasicBlockBefore(MFI);
// Keep track of the current bundle header.
const MachineInstr *CurBundle = 0;
+ // Do we expect the next instruction to be part of the same bundle?
+ bool InBundle = false;
+
for (MachineBasicBlock::const_instr_iterator MBBI = MFI->instr_begin(),
MBBE = MFI->instr_end(); MBBI != MBBE; ++MBBI) {
if (MBBI->getParent() != MFI) {
*OS << "Instruction: " << *MBBI;
continue;
}
+
+ // Check for consistent bundle flags.
+ if (InBundle && !MBBI->isBundledWithPred())
+ report("Missing BundledPred flag, "
+ "BundledSucc was set on predecessor", MBBI);
+ if (!InBundle && MBBI->isBundledWithPred())
+ report("BundledPred flag is set, "
+ "but BundledSucc not set on predecessor", MBBI);
+
// Is this a bundle header?
if (!MBBI->isInsideBundle()) {
if (CurBundle)
for (unsigned I = 0, E = MBBI->getNumOperands(); I != E; ++I)
visitMachineOperand(&MBBI->getOperand(I), I);
visitMachineInstrAfter(MBBI);
+
+ // Was this the last bundled instruction?
+ InBundle = MBBI->isBundledWithSucc();
}
if (CurBundle)
visitMachineBundleAfter(CurBundle);
+ if (InBundle)
+ report("BundledSucc flag set on last instruction in block", &MFI->back());
visitMachineBasicBlockAfter(MFI);
}
visitMachineFunctionAfter();
MF->print(*OS, Indexes);
}
*OS << "*** Bad machine code: " << msg << " ***\n"
- << "- function: " << MF->getFunction()->getName() << "\n";
+ << "- function: " << MF->getName() << "\n";
}
void MachineVerifier::report(const char *msg, const MachineBasicBlock *MBB) {
assert(MBB);
report(msg, MBB->getParent());
- *OS << "- basic block: " << MBB->getName()
- << " " << (void*)MBB
- << " (BB#" << MBB->getNumber() << ")";
+ *OS << "- basic block: BB#" << MBB->getNumber()
+ << ' ' << MBB->getName()
+ << " (" << (const void*)MBB << ')';
if (Indexes)
*OS << " [" << Indexes->getMBBStartIdx(MBB)
<< ';' << Indexes->getMBBEndIdx(MBB) << ')';
*OS << "\n";
}
+void MachineVerifier::report(const char *msg, const MachineFunction *MF,
+ const LiveInterval &LI) {
+ report(msg, MF);
+ *OS << "- interval: ";
+ if (TargetRegisterInfo::isVirtualRegister(LI.reg))
+ *OS << PrintReg(LI.reg, TRI);
+ else
+ *OS << PrintRegUnit(LI.reg, TRI);
+ *OS << ' ' << LI << '\n';
+}
+
+void MachineVerifier::report(const char *msg, const MachineBasicBlock *MBB,
+ const LiveInterval &LI) {
+ report(msg, MBB);
+ *OS << "- interval: ";
+ if (TargetRegisterInfo::isVirtualRegister(LI.reg))
+ *OS << PrintReg(LI.reg, TRI);
+ else
+ *OS << PrintRegUnit(LI.reg, TRI);
+ *OS << ' ' << LI << '\n';
+}
+
void MachineVerifier::markReachable(const MachineBasicBlock *MBB) {
BBInfo &MInfo = MBBInfoMap[MBB];
if (!MInfo.reachable) {
void MachineVerifier::visitMachineFunctionBefore() {
lastIndex = SlotIndex();
- regsReserved = TRI->getReservedRegs(*MF);
+ regsReserved = MRI->getReservedRegs();
// A sub-register of a reserved register is also reserved
for (int Reg = regsReserved.find_first(); Reg>=0;
}
}
- regsAllocatable = TRI->getAllocatableSet(*MF);
-
markReachable(&MF->front());
+
+ // Build a set of the basic blocks in the function.
+ FunctionBlocks.clear();
+ for (MachineFunction::const_iterator
+ I = MF->begin(), E = MF->end(); I != E; ++I) {
+ FunctionBlocks.insert(I);
+ BBInfo &MInfo = MBBInfoMap[I];
+
+ MInfo.Preds.insert(I->pred_begin(), I->pred_end());
+ if (MInfo.Preds.size() != I->pred_size())
+ report("MBB has duplicate entries in its predecessor list.", I);
+
+ MInfo.Succs.insert(I->succ_begin(), I->succ_end());
+ if (MInfo.Succs.size() != I->succ_size())
+ report("MBB has duplicate entries in its successor list.", I);
+ }
}
// Does iterator point to a and b as the first two elements?
E = MBB->succ_end(); I != E; ++I) {
if ((*I)->isLandingPad())
LandingPadSuccs.insert(*I);
+ if (!FunctionBlocks.count(*I))
+ report("MBB has successor that isn't part of the function.", MBB);
+ if (!MBBInfoMap[*I].Preds.count(MBB)) {
+ report("Inconsistent CFG", MBB);
+ *OS << "MBB is not in the predecessor list of the successor BB#"
+ << (*I)->getNumber() << ".\n";
+ }
+ }
+
+ // Check the predecessor list.
+ for (MachineBasicBlock::const_pred_iterator I = MBB->pred_begin(),
+ E = MBB->pred_end(); I != E; ++I) {
+ if (!FunctionBlocks.count(*I))
+ report("MBB has predecessor that isn't part of the function.", MBB);
+ if (!MBBInfoMap[*I].Succs.count(MBB)) {
+ report("Inconsistent CFG", MBB);
+ *OS << "MBB is not in the successor list of the predecessor BB#"
+ << (*I)->getNumber() << ".\n";
+ }
}
const MCAsmInfo *AsmInfo = TM->getMCAsmInfo();
++MBBI;
if (MBBI == MF->end()) {
report("MBB conditionally falls through out of function!", MBB);
- } if (MBB->succ_size() != 2) {
+ } if (MBB->succ_size() == 1) {
+ // A conditional branch with only one successor is weird, but allowed.
+ if (&*MBBI != TBB)
+ report("MBB exits via conditional branch/fall-through but only has "
+ "one CFG successor!", MBB);
+ else if (TBB != *MBB->succ_begin())
+ report("MBB exits via conditional branch/fall-through but the CFG "
+ "successor don't match the actual successor!", 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 (TBB && FBB) {
// Block conditionally branches somewhere, otherwise branches
// somewhere else.
- if (MBB->succ_size() != 2) {
+ if (MBB->succ_size() == 1) {
+ // A conditional branch with only one successor is weird, but allowed.
+ if (FBB != TBB)
+ report("MBB exits via conditional branch/branch through but only has "
+ "one CFG successor!", MBB);
+ else if (TBB != *MBB->succ_begin())
+ report("MBB exits via conditional branch/branch through but the CFG "
+ "successor don't match the actual successor!", MBB);
+ } else if (MBB->succ_size() != 2) {
report("MBB exits via conditional branch/branch but doesn't have "
"exactly two CFG successors!", MBB);
} else if (!matchPair(MBB->succ_begin(), TBB, FBB)) {
}
}
+// The operands on an INLINEASM instruction must follow a template.
+// Verify that the flag operands make sense.
+void MachineVerifier::verifyInlineAsm(const MachineInstr *MI) {
+ // The first two operands on INLINEASM are the asm string and global flags.
+ if (MI->getNumOperands() < 2) {
+ report("Too few operands on inline asm", MI);
+ return;
+ }
+ if (!MI->getOperand(0).isSymbol())
+ report("Asm string must be an external symbol", MI);
+ if (!MI->getOperand(1).isImm())
+ report("Asm flags must be an immediate", MI);
+ // Allowed flags are Extra_HasSideEffects = 1, Extra_IsAlignStack = 2,
+ // Extra_AsmDialect = 4, Extra_MayLoad = 8, and Extra_MayStore = 16.
+ if (!isUInt<5>(MI->getOperand(1).getImm()))
+ report("Unknown asm flags", &MI->getOperand(1), 1);
+
+ assert(InlineAsm::MIOp_FirstOperand == 2 && "Asm format changed");
+
+ unsigned OpNo = InlineAsm::MIOp_FirstOperand;
+ unsigned NumOps;
+ for (unsigned e = MI->getNumOperands(); OpNo < e; OpNo += NumOps) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ // There may be implicit ops after the fixed operands.
+ if (!MO.isImm())
+ break;
+ NumOps = 1 + InlineAsm::getNumOperandRegisters(MO.getImm());
+ }
+
+ if (OpNo > MI->getNumOperands())
+ report("Missing operands in last group", MI);
+
+ // An optional MDNode follows the groups.
+ if (OpNo < MI->getNumOperands() && MI->getOperand(OpNo).isMetadata())
+ ++OpNo;
+
+ // All trailing operands must be implicit registers.
+ for (unsigned e = MI->getNumOperands(); OpNo < e; ++OpNo) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ if (!MO.isReg() || !MO.isImplicit())
+ report("Expected implicit register after groups", &MO, OpNo);
+ }
+}
+
void MachineVerifier::visitMachineInstrBefore(const MachineInstr *MI) {
const MCInstrDesc &MCID = MI->getDesc();
if (MI->getNumOperands() < MCID.getNumOperands()) {
<< MI->getNumExplicitOperands() << " given.\n";
}
+ // Check the tied operands.
+ if (MI->isInlineAsm())
+ verifyInlineAsm(MI);
+
// Check the MachineMemOperands for basic consistency.
for (MachineInstr::mmo_iterator I = MI->memoperands_begin(),
E = MI->memoperands_end(); I != E; ++I) {
MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) {
const MachineInstr *MI = MO->getParent();
const MCInstrDesc &MCID = MI->getDesc();
- const MCOperandInfo &MCOI = MCID.OpInfo[MONum];
// The first MCID.NumDefs operands must be explicit register defines
if (MONum < MCID.getNumDefs()) {
+ const MCOperandInfo &MCOI = MCID.OpInfo[MONum];
if (!MO->isReg())
report("Explicit definition must be a register", MO, MONum);
else if (!MO->isDef() && !MCOI.isOptionalDef())
else if (MO->isImplicit())
report("Explicit definition marked as implicit", MO, MONum);
} else if (MONum < MCID.getNumOperands()) {
+ const MCOperandInfo &MCOI = MCID.OpInfo[MONum];
// Don't check if it's the last operand in a variadic instruction. See,
// e.g., LDM_RET in the arm back end.
if (MO->isReg() &&
if (MO->isImplicit())
report("Explicit operand marked as implicit", MO, MONum);
}
+
+ int TiedTo = MCID.getOperandConstraint(MONum, MCOI::TIED_TO);
+ if (TiedTo != -1) {
+ if (!MO->isReg())
+ report("Tied use must be a register", MO, MONum);
+ else if (!MO->isTied())
+ report("Operand should be tied", MO, MONum);
+ else if (unsigned(TiedTo) != MI->findTiedOperandIdx(MONum))
+ report("Tied def doesn't match MCInstrDesc", MO, MONum);
+ } else if (MO->isReg() && MO->isTied())
+ report("Explicit operand should not be tied", MO, MONum);
} else {
// ARM adds %reg0 operands to indicate predicates. We'll allow that.
if (MO->isReg() && !MO->isImplicit() && !MI->isVariadic() && MO->getReg())
if (MRI->tracksLiveness() && !MI->isDebugValue())
checkLiveness(MO, MONum);
+ // Verify the consistency of tied operands.
+ if (MO->isTied()) {
+ unsigned OtherIdx = MI->findTiedOperandIdx(MONum);
+ const MachineOperand &OtherMO = MI->getOperand(OtherIdx);
+ if (!OtherMO.isReg())
+ report("Must be tied to a register", MO, MONum);
+ if (!OtherMO.isTied())
+ report("Missing tie flags on tied operand", MO, MONum);
+ if (MI->findTiedOperandIdx(OtherIdx) != MONum)
+ report("Inconsistent tie links", MO, MONum);
+ if (MONum < MCID.getNumDefs()) {
+ if (OtherIdx < MCID.getNumOperands()) {
+ if (-1 == MCID.getOperandConstraint(OtherIdx, MCOI::TIED_TO))
+ report("Explicit def tied to explicit use without tie constraint",
+ MO, MONum);
+ } else {
+ if (!OtherMO.isImplicit())
+ report("Explicit def should be tied to implicit use", MO, MONum);
+ }
+ }
+ }
+
+ // Verify two-address constraints after leaving SSA form.
+ unsigned DefIdx;
+ if (!MRI->isSSA() && MO->isUse() &&
+ MI->isRegTiedToDefOperand(MONum, &DefIdx) &&
+ Reg != MI->getOperand(DefIdx).getReg())
+ report("Two-address instruction operands must be identical", MO, MONum);
// Check register classes.
if (MONum < MCID.getNumOperands() && !MO->isImplicit()) {
if (MO->readsReg()) {
regsLiveInButUnused.erase(Reg);
- bool isKill = false;
- unsigned defIdx;
- if (MI->isRegTiedToDefOperand(MONum, &defIdx)) {
- // A two-addr use counts as a kill if use and def are the same.
- unsigned DefReg = MI->getOperand(defIdx).getReg();
- if (Reg == DefReg)
- isKill = true;
- else if (TargetRegisterInfo::isPhysicalRegister(Reg)) {
- report("Two-address instruction operands must be identical", MO, MONum);
- }
- } else
- isKill = MO->isKill();
-
- if (isKill)
+ if (MO->isKill())
addRegWithSubRegs(regsKilled, Reg);
// Check that LiveVars knows this kill.
}
// Check LiveInts liveness and kill.
- if (TargetRegisterInfo::isVirtualRegister(Reg) &&
- LiveInts && !LiveInts->isNotInMIMap(MI)) {
- SlotIndex UseIdx = LiveInts->getInstructionIndex(MI).getRegSlot(true);
- if (LiveInts->hasInterval(Reg)) {
- const LiveInterval &LI = LiveInts->getInterval(Reg);
- if (!LI.liveAt(UseIdx)) {
- report("No live range at use", MO, MONum);
- *OS << UseIdx << " is not live in " << LI << '\n';
+ if (LiveInts && !LiveInts->isNotInMIMap(MI)) {
+ SlotIndex UseIdx = LiveInts->getInstructionIndex(MI);
+ // Check the cached regunit intervals.
+ if (TargetRegisterInfo::isPhysicalRegister(Reg) && !isReserved(Reg)) {
+ for (MCRegUnitIterator Units(Reg, TRI); Units.isValid(); ++Units) {
+ if (const LiveInterval *LI = LiveInts->getCachedRegUnit(*Units)) {
+ LiveRangeQuery LRQ(*LI, UseIdx);
+ if (!LRQ.valueIn()) {
+ report("No live range at use", MO, MONum);
+ *OS << UseIdx << " is not live in " << PrintRegUnit(*Units, TRI)
+ << ' ' << *LI << '\n';
+ }
+ if (MO->isKill() && !LRQ.isKill()) {
+ report("Live range continues after kill flag", MO, MONum);
+ *OS << PrintRegUnit(*Units, TRI) << ' ' << *LI << '\n';
+ }
+ }
}
- // Check for extra kill flags.
- // Note that we allow missing kill flags for now.
- if (MO->isKill() && !LI.killedAt(UseIdx.getRegSlot())) {
- report("Live range continues after kill flag", MO, MONum);
- *OS << "Live range: " << LI << '\n';
+ }
+
+ if (TargetRegisterInfo::isVirtualRegister(Reg)) {
+ if (LiveInts->hasInterval(Reg)) {
+ // This is a virtual register interval.
+ const LiveInterval &LI = LiveInts->getInterval(Reg);
+ LiveRangeQuery LRQ(LI, UseIdx);
+ if (!LRQ.valueIn()) {
+ report("No live range at use", MO, MONum);
+ *OS << UseIdx << " is not live in " << LI << '\n';
+ }
+ // Check for extra kill flags.
+ // Note that we allow missing kill flags for now.
+ if (MO->isKill() && !LRQ.isKill()) {
+ report("Live range continues after kill flag", MO, MONum);
+ *OS << "Live range: " << LI << '\n';
+ }
+ } else {
+ report("Virtual register has no live interval", MO, MONum);
}
- } else {
- report("Virtual register has no Live interval", MO, MONum);
}
}
// Reserved registers may be used even when 'dead'.
if (!isReserved(Reg))
report("Using an undefined physical register", MO, MONum);
+ } else if (MRI->def_empty(Reg)) {
+ report("Reading virtual register without a def", MO, MONum);
} else {
BBInfo &MInfo = MBBInfoMap[MI->getParent()];
// We don't know which virtual registers are live in, so only complain
// Check LiveInts for a live range, but only for virtual registers.
if (LiveInts && TargetRegisterInfo::isVirtualRegister(Reg) &&
!LiveInts->isNotInMIMap(MI)) {
- SlotIndex DefIdx = LiveInts->getInstructionIndex(MI).getRegSlot();
+ SlotIndex DefIdx = LiveInts->getInstructionIndex(MI);
+ DefIdx = DefIdx.getRegSlot(MO->isEarlyClobber());
if (LiveInts->hasInterval(Reg)) {
const LiveInterval &LI = LiveInts->getInterval(Reg);
if (const VNInfo *VNI = LI.getVNInfoAt(DefIdx)) {
assert(VNI && "NULL valno is not allowed");
- if (VNI->def != DefIdx && !MO->isEarlyClobber()) {
+ if (VNI->def != DefIdx) {
report("Inconsistent valno->def", MO, MONum);
*OS << "Valno " << VNI->id << " is not defined at "
<< DefIdx << " in " << LI << '\n';
// Now check liveness info if available
calcRegsRequired();
- if (MRI->isSSA() && !MF->empty()) {
+ // Check for killed virtual registers that should be live out.
+ for (MachineFunction::const_iterator MFI = MF->begin(), MFE = MF->end();
+ MFI != MFE; ++MFI) {
+ BBInfo &MInfo = MBBInfoMap[MFI];
+ for (RegSet::iterator
+ I = MInfo.vregsRequired.begin(), E = MInfo.vregsRequired.end(); I != E;
+ ++I)
+ if (MInfo.regsKilled.count(*I)) {
+ report("Virtual register killed in block, but needed live out.", MFI);
+ *OS << "Virtual register " << PrintReg(*I)
+ << " is used after the block.\n";
+ }
+ }
+
+ if (!MF->empty()) {
BBInfo &MInfo = MBBInfoMap[&MF->front()];
for (RegSet::iterator
I = MInfo.vregsRequired.begin(), E = MInfo.vregsRequired.end(); I != E;
void MachineVerifier::verifyLiveIntervals() {
assert(LiveInts && "Don't call verifyLiveIntervals without LiveInts");
- for (LiveIntervals::const_iterator LVI = LiveInts->begin(),
- LVE = LiveInts->end(); LVI != LVE; ++LVI) {
- const LiveInterval &LI = *LVI->second;
+ for (unsigned i = 0, e = MRI->getNumVirtRegs(); i != e; ++i) {
+ unsigned Reg = TargetRegisterInfo::index2VirtReg(i);
// Spilling and splitting may leave unused registers around. Skip them.
- if (MRI->reg_nodbg_empty(LI.reg))
+ if (MRI->reg_nodbg_empty(Reg))
continue;
- // Physical registers have much weirdness going on, mostly from coalescing.
- // We should probably fix it, but for now just ignore them.
- if (TargetRegisterInfo::isPhysicalRegister(LI.reg))
+ if (!LiveInts->hasInterval(Reg)) {
+ report("Missing live interval for virtual register", MF);
+ *OS << PrintReg(Reg, TRI) << " still has defs or uses\n";
continue;
+ }
- assert(LVI->first == LI.reg && "Invalid reg to interval mapping");
+ const LiveInterval &LI = LiveInts->getInterval(Reg);
+ assert(Reg == LI.reg && "Invalid reg to interval mapping");
+ verifyLiveInterval(LI);
+ }
- for (LiveInterval::const_vni_iterator I = LI.vni_begin(), E = LI.vni_end();
- I!=E; ++I) {
- VNInfo *VNI = *I;
- const VNInfo *DefVNI = LI.getVNInfoAt(VNI->def);
+ // Verify all the cached regunit intervals.
+ for (unsigned i = 0, e = TRI->getNumRegUnits(); i != e; ++i)
+ if (const LiveInterval *LI = LiveInts->getCachedRegUnit(i))
+ verifyLiveInterval(*LI);
+}
- if (!DefVNI) {
- if (!VNI->isUnused()) {
- report("Valno not live at def and not marked unused", MF);
- *OS << "Valno #" << VNI->id << " in " << LI << '\n';
- }
- continue;
- }
+void MachineVerifier::verifyLiveIntervalValue(const LiveInterval &LI,
+ VNInfo *VNI) {
+ if (VNI->isUnused())
+ return;
- if (VNI->isUnused())
- continue;
+ const VNInfo *DefVNI = LI.getVNInfoAt(VNI->def);
- if (DefVNI != VNI) {
- report("Live range at def has different valno", MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << " where valno #" << DefVNI->id << " is live in " << LI << '\n';
- continue;
- }
+ if (!DefVNI) {
+ report("Valno not live at def and not marked unused", MF, LI);
+ *OS << "Valno #" << VNI->id << '\n';
+ return;
+ }
- const MachineBasicBlock *MBB = LiveInts->getMBBFromIndex(VNI->def);
- if (!MBB) {
- report("Invalid definition index", MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << " in " << LI << '\n';
- continue;
- }
+ if (DefVNI != VNI) {
+ report("Live range at def has different valno", MF, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
+ << " where valno #" << DefVNI->id << " is live\n";
+ return;
+ }
- if (VNI->isPHIDef()) {
- if (VNI->def != LiveInts->getMBBStartIdx(MBB)) {
- report("PHIDef value is not defined at MBB start", MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << ", not at the beginning of BB#" << MBB->getNumber()
- << " in " << LI << '\n';
- }
- } else {
- // Non-PHI def.
- const MachineInstr *MI = LiveInts->getInstructionFromIndex(VNI->def);
- if (!MI) {
- report("No instruction at def index", MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << " in " << LI << '\n';
- continue;
- }
+ const MachineBasicBlock *MBB = LiveInts->getMBBFromIndex(VNI->def);
+ if (!MBB) {
+ report("Invalid definition index", MF, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
+ << " in " << LI << '\n';
+ return;
+ }
- bool hasDef = false;
- bool isEarlyClobber = false;
- for (ConstMIBundleOperands MOI(MI); MOI.isValid(); ++MOI) {
- if (!MOI->isReg() || !MOI->isDef())
- continue;
- if (TargetRegisterInfo::isVirtualRegister(LI.reg)) {
- if (MOI->getReg() != LI.reg)
- continue;
- } else {
- if (!TargetRegisterInfo::isPhysicalRegister(MOI->getReg()) ||
- !TRI->regsOverlap(LI.reg, MOI->getReg()))
- continue;
- }
- hasDef = true;
- if (MOI->isEarlyClobber())
- isEarlyClobber = true;
- }
+ if (VNI->isPHIDef()) {
+ if (VNI->def != LiveInts->getMBBStartIdx(MBB)) {
+ report("PHIDef value is not defined at MBB start", MBB, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
+ << ", not at the beginning of BB#" << MBB->getNumber() << '\n';
+ }
+ return;
+ }
- if (!hasDef) {
- report("Defining instruction does not modify register", MI);
- *OS << "Valno #" << VNI->id << " in " << LI << '\n';
- }
+ // Non-PHI def.
+ const MachineInstr *MI = LiveInts->getInstructionFromIndex(VNI->def);
+ if (!MI) {
+ report("No instruction at def index", MBB, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ return;
+ }
- // Early clobber defs begin at USE slots, but other defs must begin at
- // DEF slots.
- if (isEarlyClobber) {
- if (!VNI->def.isEarlyClobber()) {
- report("Early clobber def must be at an early-clobber slot", MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << " in " << LI << '\n';
- }
- } else if (!VNI->def.isRegister()) {
- report("Non-PHI, non-early clobber def must be at a register slot",
- MF);
- *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
- << " in " << LI << '\n';
- }
- }
+ bool hasDef = false;
+ bool isEarlyClobber = false;
+ for (ConstMIBundleOperands MOI(MI); MOI.isValid(); ++MOI) {
+ if (!MOI->isReg() || !MOI->isDef())
+ continue;
+ if (TargetRegisterInfo::isVirtualRegister(LI.reg)) {
+ if (MOI->getReg() != LI.reg)
+ continue;
+ } else {
+ if (!TargetRegisterInfo::isPhysicalRegister(MOI->getReg()) ||
+ !TRI->hasRegUnit(MOI->getReg(), LI.reg))
+ continue;
}
+ hasDef = true;
+ if (MOI->isEarlyClobber())
+ isEarlyClobber = true;
+ }
- for (LiveInterval::const_iterator I = LI.begin(), E = LI.end(); I!=E; ++I) {
- const VNInfo *VNI = I->valno;
- assert(VNI && "Live range has no valno");
+ if (!hasDef) {
+ report("Defining instruction does not modify register", MI);
+ *OS << "Valno #" << VNI->id << " in " << LI << '\n';
+ }
- if (VNI->id >= LI.getNumValNums() || VNI != LI.getValNumInfo(VNI->id)) {
- report("Foreign valno in live range", MF);
- I->print(*OS);
- *OS << " has a valno not in " << LI << '\n';
- }
+ // Early clobber defs begin at USE slots, but other defs must begin at
+ // DEF slots.
+ if (isEarlyClobber) {
+ if (!VNI->def.isEarlyClobber()) {
+ report("Early clobber def must be at an early-clobber slot", MBB, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ }
+ } else if (!VNI->def.isRegister()) {
+ report("Non-PHI, non-early clobber def must be at a register slot",
+ MBB, LI);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ }
+}
- if (VNI->isUnused()) {
- report("Live range valno is marked unused", MF);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- }
+void
+MachineVerifier::verifyLiveIntervalSegment(const LiveInterval &LI,
+ LiveInterval::const_iterator I) {
+ const VNInfo *VNI = I->valno;
+ assert(VNI && "Live range has no valno");
+
+ if (VNI->id >= LI.getNumValNums() || VNI != LI.getValNumInfo(VNI->id)) {
+ report("Foreign valno in live range", MF, LI);
+ *OS << *I << " has a bad valno\n";
+ }
- const MachineBasicBlock *MBB = LiveInts->getMBBFromIndex(I->start);
- if (!MBB) {
- report("Bad start of live segment, no basic block", MF);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- continue;
- }
- SlotIndex MBBStartIdx = LiveInts->getMBBStartIdx(MBB);
- if (I->start != MBBStartIdx && I->start != VNI->def) {
- report("Live segment must begin at MBB entry or valno def", MBB);
- I->print(*OS);
- *OS << " in " << LI << '\n' << "Basic block starts at "
- << MBBStartIdx << '\n';
- }
+ if (VNI->isUnused()) {
+ report("Live range valno is marked unused", MF, LI);
+ *OS << *I << '\n';
+ }
- const MachineBasicBlock *EndMBB =
- LiveInts->getMBBFromIndex(I->end.getPrevSlot());
- if (!EndMBB) {
- report("Bad end of live segment, no basic block", MF);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- continue;
- }
+ const MachineBasicBlock *MBB = LiveInts->getMBBFromIndex(I->start);
+ if (!MBB) {
+ report("Bad start of live segment, no basic block", MF, LI);
+ *OS << *I << '\n';
+ return;
+ }
+ SlotIndex MBBStartIdx = LiveInts->getMBBStartIdx(MBB);
+ if (I->start != MBBStartIdx && I->start != VNI->def) {
+ report("Live segment must begin at MBB entry or valno def", MBB, LI);
+ *OS << *I << '\n';
+ }
- // No more checks for live-out segments.
- if (I->end == LiveInts->getMBBEndIdx(EndMBB))
- continue;
+ const MachineBasicBlock *EndMBB =
+ LiveInts->getMBBFromIndex(I->end.getPrevSlot());
+ if (!EndMBB) {
+ report("Bad end of live segment, no basic block", MF, LI);
+ *OS << *I << '\n';
+ return;
+ }
- // The live segment is ending inside EndMBB
- const MachineInstr *MI =
- LiveInts->getInstructionFromIndex(I->end.getPrevSlot());
- if (!MI) {
- report("Live segment doesn't end at a valid instruction", EndMBB);
- I->print(*OS);
- *OS << " in " << LI << '\n' << "Basic block starts at "
- << MBBStartIdx << '\n';
+ // No more checks for live-out segments.
+ if (I->end == LiveInts->getMBBEndIdx(EndMBB))
+ return;
+
+ // RegUnit intervals are allowed dead phis.
+ if (!TargetRegisterInfo::isVirtualRegister(LI.reg) && VNI->isPHIDef() &&
+ I->start == VNI->def && I->end == VNI->def.getDeadSlot())
+ return;
+
+ // The live segment is ending inside EndMBB
+ const MachineInstr *MI =
+ LiveInts->getInstructionFromIndex(I->end.getPrevSlot());
+ if (!MI) {
+ report("Live segment doesn't end at a valid instruction", EndMBB, LI);
+ *OS << *I << '\n';
+ return;
+ }
+
+ // The block slot must refer to a basic block boundary.
+ if (I->end.isBlock()) {
+ report("Live segment ends at B slot of an instruction", EndMBB, LI);
+ *OS << *I << '\n';
+ }
+
+ if (I->end.isDead()) {
+ // Segment ends on the dead slot.
+ // That means there must be a dead def.
+ if (!SlotIndex::isSameInstr(I->start, I->end)) {
+ report("Live segment ending at dead slot spans instructions", EndMBB, LI);
+ *OS << *I << '\n';
+ }
+ }
+
+ // A live segment can only end at an early-clobber slot if it is being
+ // redefined by an early-clobber def.
+ if (I->end.isEarlyClobber()) {
+ if (I+1 == LI.end() || (I+1)->start != I->end) {
+ report("Live segment ending at early clobber slot must be "
+ "redefined by an EC def in the same instruction", EndMBB, LI);
+ *OS << *I << '\n';
+ }
+ }
+
+ // The following checks only apply to virtual registers. Physreg liveness
+ // is too weird to check.
+ if (TargetRegisterInfo::isVirtualRegister(LI.reg)) {
+ // A live range can end with either a redefinition, a kill flag on a
+ // use, or a dead flag on a def.
+ bool hasRead = false;
+ bool hasDeadDef = false;
+ for (ConstMIBundleOperands MOI(MI); MOI.isValid(); ++MOI) {
+ if (!MOI->isReg() || MOI->getReg() != LI.reg)
continue;
- }
+ if (MOI->readsReg())
+ hasRead = true;
+ if (MOI->isDef() && MOI->isDead())
+ hasDeadDef = true;
+ }
- // The block slot must refer to a basic block boundary.
- if (I->end.isBlock()) {
- report("Live segment ends at B slot of an instruction", MI);
+ if (I->end.isDead()) {
+ if (!hasDeadDef) {
+ report("Instruction doesn't have a dead def operand", MI);
I->print(*OS);
*OS << " in " << LI << '\n';
}
-
- if (I->end.isDead()) {
- // Segment ends on the dead slot.
- // That means there must be a dead def.
- if (!SlotIndex::isSameInstr(I->start, I->end)) {
- report("Live segment ending at dead slot spans instructions", MI);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- }
- }
-
- // A live segment can only end at an early-clobber slot if it is being
- // redefined by an early-clobber def.
- if (I->end.isEarlyClobber()) {
- if (I+1 == E || (I+1)->start != I->end) {
- report("Live segment ending at early clobber slot must be "
- "redefined by an EC def in the same instruction", MI);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- }
+ } else {
+ if (!hasRead) {
+ report("Instruction ending live range doesn't read the register", MI);
+ *OS << *I << " in " << LI << '\n';
}
+ }
+ }
- // The following checks only apply to virtual registers. Physreg liveness
- // is too weird to check.
- if (TargetRegisterInfo::isVirtualRegister(LI.reg)) {
- // A live range can end with either a redefinition, a kill flag on a
- // use, or a dead flag on a def.
- bool hasRead = false;
- bool hasDeadDef = false;
- for (ConstMIBundleOperands MOI(MI); MOI.isValid(); ++MOI) {
- if (!MOI->isReg() || MOI->getReg() != LI.reg)
- continue;
- if (MOI->readsReg())
- hasRead = true;
- if (MOI->isDef() && MOI->isDead())
- hasDeadDef = true;
- }
-
- if (I->end.isDead()) {
- if (!hasDeadDef) {
- report("Instruction doesn't have a dead def operand", MI);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- }
- } else {
- if (!hasRead) {
- report("Instruction ending live range doesn't read the register",
- MI);
- I->print(*OS);
- *OS << " in " << LI << '\n';
- }
- }
- }
+ // Now check all the basic blocks in this live segment.
+ MachineFunction::const_iterator MFI = MBB;
+ // Is this live range the beginning of a non-PHIDef VN?
+ if (I->start == VNI->def && !VNI->isPHIDef()) {
+ // Not live-in to any blocks.
+ if (MBB == EndMBB)
+ return;
+ // Skip this block.
+ ++MFI;
+ }
+ for (;;) {
+ assert(LiveInts->isLiveInToMBB(LI, MFI));
+ // We don't know how to track physregs into a landing pad.
+ if (!TargetRegisterInfo::isVirtualRegister(LI.reg) &&
+ MFI->isLandingPad()) {
+ if (&*MFI == EndMBB)
+ break;
+ ++MFI;
+ continue;
+ }
- // Now check all the basic blocks in this live segment.
- MachineFunction::const_iterator MFI = MBB;
- // Is this live range the beginning of a non-PHIDef VN?
- if (I->start == VNI->def && !VNI->isPHIDef()) {
- // Not live-in to any blocks.
- if (MBB == EndMBB)
- continue;
- // Skip this block.
- ++MFI;
+ // Is VNI a PHI-def in the current block?
+ bool IsPHI = VNI->isPHIDef() &&
+ VNI->def == LiveInts->getMBBStartIdx(MFI);
+
+ // Check that VNI is live-out of all predecessors.
+ for (MachineBasicBlock::const_pred_iterator PI = MFI->pred_begin(),
+ PE = MFI->pred_end(); PI != PE; ++PI) {
+ SlotIndex PEnd = LiveInts->getMBBEndIdx(*PI);
+ const VNInfo *PVNI = LI.getVNInfoBefore(PEnd);
+
+ // All predecessors must have a live-out value.
+ if (!PVNI) {
+ report("Register not marked live out of predecessor", *PI, LI);
+ *OS << "Valno #" << VNI->id << " live into BB#" << MFI->getNumber()
+ << '@' << LiveInts->getMBBStartIdx(MFI) << ", not live before "
+ << PEnd << '\n';
+ continue;
}
- for (;;) {
- assert(LiveInts->isLiveInToMBB(LI, MFI));
- // We don't know how to track physregs into a landing pad.
- if (TargetRegisterInfo::isPhysicalRegister(LI.reg) &&
- MFI->isLandingPad()) {
- if (&*MFI == EndMBB)
- break;
- ++MFI;
- continue;
- }
- // Check that VNI is live-out of all predecessors.
- for (MachineBasicBlock::const_pred_iterator PI = MFI->pred_begin(),
- PE = MFI->pred_end(); PI != PE; ++PI) {
- SlotIndex PEnd = LiveInts->getMBBEndIdx(*PI);
- const VNInfo *PVNI = LI.getVNInfoBefore(PEnd);
-
- if (VNI->isPHIDef() && VNI->def == LiveInts->getMBBStartIdx(MFI))
- continue;
-
- if (!PVNI) {
- report("Register not marked live out of predecessor", *PI);
- *OS << "Valno #" << VNI->id << " live into BB#" << MFI->getNumber()
- << '@' << LiveInts->getMBBStartIdx(MFI) << ", not live before "
- << PEnd << " in " << LI << '\n';
- continue;
- }
- if (PVNI != VNI) {
- report("Different value live out of predecessor", *PI);
- *OS << "Valno #" << PVNI->id << " live out of BB#"
- << (*PI)->getNumber() << '@' << PEnd
- << "\nValno #" << VNI->id << " live into BB#" << MFI->getNumber()
- << '@' << LiveInts->getMBBStartIdx(MFI) << " in " << LI << '\n';
- }
- }
- if (&*MFI == EndMBB)
- break;
- ++MFI;
+ // Only PHI-defs can take different predecessor values.
+ if (!IsPHI && PVNI != VNI) {
+ report("Different value live out of predecessor", *PI, LI);
+ *OS << "Valno #" << PVNI->id << " live out of BB#"
+ << (*PI)->getNumber() << '@' << PEnd
+ << "\nValno #" << VNI->id << " live into BB#" << MFI->getNumber()
+ << '@' << LiveInts->getMBBStartIdx(MFI) << '\n';
}
}
+ if (&*MFI == EndMBB)
+ break;
+ ++MFI;
+ }
+}
- // 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);
- *OS << NumComp << " components in " << LI << '\n';
- for (unsigned comp = 0; comp != NumComp; ++comp) {
- *OS << comp << ": valnos";
- for (LiveInterval::const_vni_iterator I = LI.vni_begin(),
- E = LI.vni_end(); I!=E; ++I)
- if (comp == ConEQ.getEqClass(*I))
- *OS << ' ' << (*I)->id;
- *OS << '\n';
- }
+void MachineVerifier::verifyLiveInterval(const LiveInterval &LI) {
+ for (LiveInterval::const_vni_iterator I = LI.vni_begin(), E = LI.vni_end();
+ I!=E; ++I)
+ verifyLiveIntervalValue(LI, *I);
+
+ for (LiveInterval::const_iterator I = LI.begin(), E = LI.end(); I!=E; ++I)
+ verifyLiveIntervalSegment(LI, I);
+
+ // 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) {
+ *OS << comp << ": valnos";
+ for (LiveInterval::const_vni_iterator I = LI.vni_begin(),
+ E = LI.vni_end(); I!=E; ++I)
+ if (comp == ConEQ.getEqClass(*I))
+ *OS << ' ' << (*I)->id;
+ *OS << '\n';
}
}
}
projects / oota-llvm.git / blobdiff