#include "llvm/IR/Value.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
-
+#include "llvm/Target/TargetSubtargetInfo.h"
#include <memory>
using namespace llvm;
namespace {
class LDVImpl;
class UserValue {
- const MDNode *variable; ///< The debug info variable we are part of.
+ const MDNode *Variable; ///< The debug info variable we are part of.
+ const MDNode *Expression; ///< Any complex address expression.
unsigned offset; ///< Byte offset into variable.
bool IsIndirect; ///< true if this is a register-indirect+offset value.
DebugLoc dl; ///< The debug location for the variable. This is
public:
/// UserValue - Create a new UserValue.
- UserValue(const MDNode *var, unsigned o, bool i, DebugLoc L,
- LocMap::Allocator &alloc)
- : variable(var), offset(o), IsIndirect(i), dl(L), leader(this),
- next(nullptr), locInts(alloc)
- {}
+ UserValue(const MDNode *var, const MDNode *expr, unsigned o, bool i,
+ DebugLoc L, LocMap::Allocator &alloc)
+ : Variable(var), Expression(expr), offset(o), IsIndirect(i), dl(L),
+ leader(this), next(nullptr), locInts(alloc) {}
/// getLeader - Get the leader of this value's equivalence class.
UserValue *getLeader() {
UserValue *getNext() const { return next; }
/// match - Does this UserValue match the parameters?
- bool match(const MDNode *Var, unsigned Offset, bool indirect) const {
- return Var == variable && Offset == offset && indirect == IsIndirect;
+ bool match(const MDNode *Var, const MDNode *Expr, const MDLocation *IA,
+ unsigned Offset, bool indirect) const {
+ return Var == Variable && Expr == Expression && dl->getInlinedAt() == IA &&
+ Offset == offset && indirect == IsIndirect;
}
/// merge - Merge equivalence classes.
void emitDebugValues(VirtRegMap *VRM,
LiveIntervals &LIS, const TargetInstrInfo &TRI);
- /// findDebugLoc - Return DebugLoc used for this DBG_VALUE instruction. A
- /// variable may have more than one corresponding DBG_VALUE instructions.
- /// Only first one needs DebugLoc to identify variable's lexical scope
- /// in source file.
- DebugLoc findDebugLoc();
-
/// getDebugLoc - Return DebugLoc of this UserValue.
DebugLoc getDebugLoc() { return dl;}
- void print(raw_ostream&, const TargetMachine*);
+ void print(raw_ostream &, const TargetRegisterInfo *);
};
} // namespace
UVMap userVarMap;
/// getUserValue - Find or create a UserValue.
- UserValue *getUserValue(const MDNode *Var, unsigned Offset,
- bool IsIndirect, DebugLoc DL);
+ UserValue *getUserValue(const MDNode *Var, const MDNode *Expr,
+ unsigned Offset, bool IsIndirect, DebugLoc DL);
/// lookupVirtReg - Find the EC leader for VirtReg or null.
UserValue *lookupVirtReg(unsigned VirtReg);
void computeIntervals();
public:
- LDVImpl(LiveDebugVariables *ps) : pass(*ps), EmitDone(false),
- ModifiedMF(false) {}
+ LDVImpl(LiveDebugVariables *ps)
+ : pass(*ps), MF(nullptr), EmitDone(false), ModifiedMF(false) {}
bool runOnMachineFunction(MachineFunction &mf);
/// clear - Release all memory.
void clear() {
+ MF = nullptr;
userValues.clear();
virtRegToEqClass.clear();
userVarMap.clear();
"Dbg values are not emitted in LDV");
EmitDone = false;
ModifiedMF = false;
+ LS.reset();
}
/// mapVirtReg - Map virtual register to an equivalence class.
};
} // namespace
-void UserValue::print(raw_ostream &OS, const TargetMachine *TM) {
- DIVariable DV(variable);
- OS << "!\"";
- DV.printExtendedName(OS);
+static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
+ const LLVMContext &Ctx) {
+ if (!DL)
+ return;
+
+ auto *Scope = cast<MDScope>(DL.getScope());
+ // Omit the directory, because it's likely to be long and uninteresting.
+ CommentOS << Scope->getFilename();
+ CommentOS << ':' << DL.getLine();
+ if (DL.getCol() != 0)
+ CommentOS << ':' << DL.getCol();
+
+ DebugLoc InlinedAtDL = DL.getInlinedAt();
+ if (!InlinedAtDL)
+ return;
+
+ CommentOS << " @[ ";
+ printDebugLoc(InlinedAtDL, CommentOS, Ctx);
+ CommentOS << " ]";
+}
+
+static void printExtendedName(raw_ostream &OS, const MDLocalVariable *V,
+ const MDLocation *DL) {
+ const LLVMContext &Ctx = V->getContext();
+ StringRef Res = V->getName();
+ if (!Res.empty())
+ OS << Res << "," << V->getLine();
+ if (auto *InlinedAt = DL->getInlinedAt()) {
+ if (DebugLoc InlinedAtDL = InlinedAt) {
+ OS << " @[";
+ printDebugLoc(InlinedAtDL, OS, Ctx);
+ OS << "]";
+ }
+ }
+}
+
+void UserValue::print(raw_ostream &OS, const TargetRegisterInfo *TRI) {
+ auto *DV = cast<MDLocalVariable>(Variable);
+ OS << "!\"";
+ printExtendedName(OS, DV, dl);
+
OS << "\"\t";
if (offset)
OS << '+' << offset;
}
for (unsigned i = 0, e = locations.size(); i != e; ++i) {
OS << " Loc" << i << '=';
- locations[i].print(OS, TM);
+ locations[i].print(OS, TRI);
}
OS << '\n';
}
void LDVImpl::print(raw_ostream &OS) {
OS << "********** DEBUG VARIABLES **********\n";
for (unsigned i = 0, e = userValues.size(); i != e; ++i)
- userValues[i]->print(OS, &MF->getTarget());
+ userValues[i]->print(OS, TRI);
}
void UserValue::coalesceLocation(unsigned LocNo) {
LDV->mapVirtReg(locations[i].getReg(), this);
}
-UserValue *LDVImpl::getUserValue(const MDNode *Var, unsigned Offset,
- bool IsIndirect, DebugLoc DL) {
+UserValue *LDVImpl::getUserValue(const MDNode *Var, const MDNode *Expr,
+ unsigned Offset, bool IsIndirect,
+ DebugLoc DL) {
UserValue *&Leader = userVarMap[Var];
if (Leader) {
UserValue *UV = Leader->getLeader();
Leader = UV;
for (; UV; UV = UV->getNext())
- if (UV->match(Var, Offset, IsIndirect))
+ if (UV->match(Var, Expr, DL->getInlinedAt(), Offset, IsIndirect))
return UV;
}
userValues.push_back(
- make_unique<UserValue>(Var, Offset, IsIndirect, DL, allocator));
+ make_unique<UserValue>(Var, Expr, Offset, IsIndirect, DL, allocator));
UserValue *UV = userValues.back().get();
Leader = UserValue::merge(Leader, UV);
return UV;
bool LDVImpl::handleDebugValue(MachineInstr *MI, SlotIndex Idx) {
// DBG_VALUE loc, offset, variable
- if (MI->getNumOperands() != 3 ||
+ if (MI->getNumOperands() != 4 ||
!(MI->getOperand(1).isReg() || MI->getOperand(1).isImm()) ||
!MI->getOperand(2).isMetadata()) {
DEBUG(dbgs() << "Can't handle " << *MI);
// Get or create the UserValue for (variable,offset).
bool IsIndirect = MI->isIndirectDebugValue();
unsigned Offset = IsIndirect ? MI->getOperand(1).getImm() : 0;
- const MDNode *Var = MI->getOperand(2).getMetadata();
+ const MDNode *Var = MI->getDebugVariable();
+ const MDNode *Expr = MI->getDebugExpression();
//here.
- UserValue *UV = getUserValue(Var, Offset, IsIndirect, MI->getDebugLoc());
+ UserValue *UV =
+ getUserValue(Var, Expr, Offset, IsIndirect, MI->getDebugLoc());
UV->addDef(Idx, MI->getOperand(0));
return true;
}
}
bool LDVImpl::runOnMachineFunction(MachineFunction &mf) {
+ clear();
MF = &mf;
LIS = &pass.getAnalysis<LiveIntervals>();
MDT = &pass.getAnalysis<MachineDominatorTree>();
- TRI = mf.getTarget().getRegisterInfo();
- clear();
+ TRI = mf.getSubtarget().getRegisterInfo();
LS.initialize(mf);
DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: "
<< mf.getName() << " **********\n");
return Changed;
}
+static void removeDebugValues(MachineFunction &mf) {
+ for (MachineBasicBlock &MBB : mf) {
+ for (auto MBBI = MBB.begin(), MBBE = MBB.end(); MBBI != MBBE; ) {
+ if (!MBBI->isDebugValue()) {
+ ++MBBI;
+ continue;
+ }
+ MBBI = MBB.erase(MBBI);
+ }
+ }
+}
+
bool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) {
if (!EnableLDV)
return false;
+ if (!FunctionDIs.count(mf.getFunction())) {
+ removeDebugValues(mf);
+ return false;
+ }
if (!pImpl)
pImpl = new LDVImpl(this);
return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf);
std::next(MachineBasicBlock::iterator(MI));
}
-DebugLoc UserValue::findDebugLoc() {
- DebugLoc D = dl;
- dl = DebugLoc();
- return D;
-}
void UserValue::insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx,
unsigned LocNo,
LiveIntervals &LIS,
MachineOperand &Loc = locations[LocNo];
++NumInsertedDebugValues;
+ assert(cast<MDLocalVariable>(Variable)
+ ->isValidLocationForIntrinsic(getDebugLoc()) &&
+ "Expected inlined-at fields to agree");
if (Loc.isReg())
- BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE),
- IsIndirect, Loc.getReg(), offset, variable);
+ BuildMI(*MBB, I, getDebugLoc(), TII.get(TargetOpcode::DBG_VALUE),
+ IsIndirect, Loc.getReg(), offset, Variable, Expression);
else
- BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE))
- .addOperand(Loc).addImm(offset).addMetadata(variable);
+ BuildMI(*MBB, I, getDebugLoc(), TII.get(TargetOpcode::DBG_VALUE))
+ .addOperand(Loc)
+ .addImm(offset)
+ .addMetadata(Variable)
+ .addMetadata(Expression);
}
void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS,
void LDVImpl::emitDebugValues(VirtRegMap *VRM) {
DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n");
- const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
+ if (!MF)
+ return;
+ const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
for (unsigned i = 0, e = userValues.size(); i != e; ++i) {
- DEBUG(userValues[i]->print(dbgs(), &MF->getTarget()));
+ DEBUG(userValues[i]->print(dbgs(), TRI));
userValues[i]->rewriteLocations(*VRM, *TRI);
userValues[i]->emitDebugValues(VRM, *LIS, *TII);
}
static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM);
}
+bool LiveDebugVariables::doInitialization(Module &M) {
+ FunctionDIs = makeSubprogramMap(M);
+ return Pass::doInitialization(M);
+}
#ifndef NDEBUG
void LiveDebugVariables::dump() {
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