index 7ca9443594b2948ecdf60ce0398f8811005aac9b..41735fca3765cd0df29f48885b4ce52f9cd69182 100644 (file)
#ifndef CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
#define CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
#include "llvm/IR/Constants.h"
+#include "llvm/IR/DebugInfo.h"
#include "llvm/MC/MachineLocation.h"
#include "llvm/MC/MCSymbol.h"
namespace llvm {
-class DwarfCompileUnit;
class MDNode;
/// \brief This struct describes location entries emitted in the .debug_loc
/// section.
const MCSymbol *Begin;
const MCSymbol *End;
- // Type of entry that this represents.
- enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
- enum EntryType EntryKind;
-
- union {
- int64_t Int;
- const ConstantFP *CFP;
- const ConstantInt *CIP;
- } Constants;
-
- // The location in the machine frame.
- MachineLocation Loc;
-
- // The variable to which this location entry corresponds.
- const MDNode *Variable;
-
- // The compile unit to which this location entry is referenced by.
- const DwarfCompileUnit *Unit;
-
- bool hasSameValueOrLocation(const DebugLocEntry &Next) {
- if (EntryKind != Next.EntryKind)
- return false;
-
- bool EqualValues;
- switch (EntryKind) {
- case E_Location:
- EqualValues = Loc == Next.Loc;
- break;
- case E_Integer:
- EqualValues = Constants.Int == Next.Constants.Int;
- break;
- case E_ConstantFP:
- EqualValues = Constants.CFP == Next.Constants.CFP;
- break;
- case E_ConstantInt:
- EqualValues = Constants.CIP == Next.Constants.CIP;
- break;
+public:
+ /// A single location or constant.
+ struct Value {
+ Value(const MDNode *Var, int64_t i)
+ : Variable(Var), EntryKind(E_Integer) {
+ Constant.Int = i;
+ }
+ Value(const MDNode *Var, const ConstantFP *CFP)
+ : Variable(Var), EntryKind(E_ConstantFP) {
+ Constant.CFP = CFP;
+ }
+ Value(const MDNode *Var, const ConstantInt *CIP)
+ : Variable(Var), EntryKind(E_ConstantInt) {
+ Constant.CIP = CIP;
+ }
+ Value(const MDNode *Var, MachineLocation Loc)
+ : Variable(Var), EntryKind(E_Location), Loc(Loc) {
}
- return EqualValues;
- }
+ // The variable to which this location entry corresponds.
+ const MDNode *Variable;
+
+ // Type of entry that this represents.
+ enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
+ enum EntryType EntryKind;
+
+ // Either a constant,
+ union {
+ int64_t Int;
+ const ConstantFP *CFP;
+ const ConstantInt *CIP;
+ } Constant;
+
+ // Or a location in the machine frame.
+ MachineLocation Loc;
+
+ bool operator==(const Value &other) const {
+ if (EntryKind != other.EntryKind)
+ return false;
+
+ switch (EntryKind) {
+ case E_Location:
+ return Loc == other.Loc;
+ case E_Integer:
+ return Constant.Int == other.Constant.Int;
+ case E_ConstantFP:
+ return Constant.CFP == other.Constant.CFP;
+ case E_ConstantInt:
+ return Constant.CIP == other.Constant.CIP;
+ }
+ llvm_unreachable("unhandled EntryKind");
+ }
+
+ // Compare two pieces based on their offset.
+ bool operator<(const Value &other) const {
+ DIVariable Var(Variable);
+ DIVariable OtherVar(other.Variable);
+ return Var.getPieceOffset() < OtherVar.getPieceOffset();
+ }
+
+ bool isLocation() const { return EntryKind == E_Location; }
+ bool isInt() const { return EntryKind == E_Integer; }
+ bool isConstantFP() const { return EntryKind == E_ConstantFP; }
+ bool isConstantInt() const { return EntryKind == E_ConstantInt; }
+ int64_t getInt() const { return Constant.Int; }
+ const ConstantFP *getConstantFP() const { return Constant.CFP; }
+ const ConstantInt *getConstantInt() const { return Constant.CIP; }
+ MachineLocation getLoc() const { return Loc; }
+ const MDNode *getVariable() const { return Variable; }
+ };
+private:
+ /// A list of locations/constants belonging to this entry, sorted by offset.
+ SmallVector<Value, 1> Values;
public:
- DebugLocEntry() : Begin(0), End(0), Variable(0), Unit(0) {
- Constants.Int = 0;
- }
- DebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L,
- const MDNode *V, const DwarfCompileUnit *U)
- : Begin(B), End(E), Loc(L), Variable(V), Unit(U) {
- Constants.Int = 0;
- EntryKind = E_Location;
+ DebugLocEntry() : Begin(nullptr), End(nullptr) {}
+ DebugLocEntry(const MCSymbol *B, const MCSymbol *E, Value Val)
+ : Begin(B), End(E) {
+ Values.push_back(std::move(Val));
}
- DebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i,
- const MDNode *V, const DwarfCompileUnit *U)
- : Begin(B), End(E), Variable(V), Unit(U) {
- Constants.Int = i;
- EntryKind = E_Integer;
- }
- DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantFP *FPtr,
- const MDNode *V, const DwarfCompileUnit *U)
- : Begin(B), End(E), Variable(V), Unit(U) {
- Constants.CFP = FPtr;
- EntryKind = E_ConstantFP;
- }
- DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantInt *IPtr,
- const MDNode *V, const DwarfCompileUnit *U)
- : Begin(B), End(E), Variable(V), Unit(U) {
- Constants.CIP = IPtr;
- EntryKind = E_ConstantInt;
+
+ /// \brief If this and Next are describing different pieces of the same
+ // variable, merge them by appending Next's values to the current
+ // list of values.
+ // Return true if the merge was successful.
+ bool MergeValues(const DebugLocEntry &Next) {
+ if (Begin == Next.Begin && Values.size() > 0 && Next.Values.size() > 0) {
+ DIVariable Var(Values[0].Variable);
+ DIVariable NextVar(Next.Values[0].Variable);
+ if (Var.getName() == NextVar.getName() &&
+ Var.isVariablePiece() && NextVar.isVariablePiece()) {
+ Values.append(Next.Values.begin(), Next.Values.end());
+ sortUniqueValues();
+ End = Next.End;
+ return true;
+ }
+ }
+ return false;
}
/// \brief Attempt to merge this DebugLocEntry with Next and return
/// true if the merge was successful. Entries can be merged if they
/// share the same Loc/Constant and if Next immediately follows this
/// Entry.
- bool Merge(const DebugLocEntry &Next) {
- if (End == Next.Begin && hasSameValueOrLocation(Next)) {
+ bool MergeRanges(const DebugLocEntry &Next) {
+ // If this and Next are describing the same variable, merge them.
+ if ((End == Next.Begin && Values == Next.Values)) {
End = Next.End;
return true;
}
return false;
}
- bool isLocation() const { return EntryKind == E_Location; }
- bool isInt() const { return EntryKind == E_Integer; }
- bool isConstantFP() const { return EntryKind == E_ConstantFP; }
- bool isConstantInt() const { return EntryKind == E_ConstantInt; }
- int64_t getInt() const { return Constants.Int; }
- const ConstantFP *getConstantFP() const { return Constants.CFP; }
- const ConstantInt *getConstantInt() const { return Constants.CIP; }
- const MDNode *getVariable() const { return Variable; }
+
const MCSymbol *getBeginSym() const { return Begin; }
const MCSymbol *getEndSym() const { return End; }
- const DwarfCompileUnit *getCU() const { return Unit; }
- MachineLocation getLoc() const { return Loc; }
+ const ArrayRef<Value> getValues() const { return Values; }
+ void addValue(Value Val) {
+ assert(DIVariable(Val.Variable).isVariablePiece() &&
+ "multi-value DebugLocEntries must be pieces");
+ Values.push_back(Val);
+ sortUniqueValues();
+ }
+
+ // Sort the pieces by offset.
+ // Remove any duplicate entries by dropping all but the first.
+ void sortUniqueValues() {
+ std::sort(Values.begin(), Values.end());
+ Values.erase(std::unique(Values.begin(), Values.end()), Values.end());
+ }
};
}