#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
+
+#include "DebugLocStream.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MachineLocation.h"
namespace llvm {
-class MDNode;
+class AsmPrinter;
+
/// \brief This struct describes location entries emitted in the .debug_loc
/// section.
class DebugLocEntry {
- // Begin and end symbols for the address range that this location is valid.
+ /// Begin and end symbols for the address range that this location is valid.
const MCSymbol *Begin;
const MCSymbol *End;
public:
- /// A single location or constant.
+ /// \brief A single location or constant.
struct Value {
- Value(const MDNode *Var, const MDNode *Expr, int64_t i)
- : Variable(Var), Expression(Expr), EntryKind(E_Integer) {
+ Value(const DIExpression *Expr, int64_t i)
+ : Expression(Expr), EntryKind(E_Integer) {
Constant.Int = i;
}
- Value(const MDNode *Var, const MDNode *Expr, const ConstantFP *CFP)
- : Variable(Var), Expression(Expr), EntryKind(E_ConstantFP) {
+ Value(const DIExpression *Expr, const ConstantFP *CFP)
+ : Expression(Expr), EntryKind(E_ConstantFP) {
Constant.CFP = CFP;
}
- Value(const MDNode *Var, const MDNode *Expr, const ConstantInt *CIP)
- : Variable(Var), Expression(Expr), EntryKind(E_ConstantInt) {
+ Value(const DIExpression *Expr, const ConstantInt *CIP)
+ : Expression(Expr), EntryKind(E_ConstantInt) {
Constant.CIP = CIP;
}
- Value(const MDNode *Var, const MDNode *Expr, MachineLocation Loc)
- : Variable(Var), Expression(Expr), EntryKind(E_Location), Loc(Loc) {
- assert(DIVariable(Var).Verify());
- assert(DIExpression(Expr).Verify());
+ Value(const DIExpression *Expr, MachineLocation Loc)
+ : Expression(Expr), EntryKind(E_Location), Loc(Loc) {
+ assert(cast<DIExpression>(Expr)->isValid());
}
- // The variable to which this location entry corresponds.
- const MDNode *Variable;
-
- // Any complex address location expression for this Value.
- const MDNode *Expression;
+ /// Any complex address location expression for this Value.
+ const DIExpression *Expression;
- // Type of entry that this represents.
+ /// Type of entry that this represents.
enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
enum EntryType EntryKind;
- // Either a constant,
+ /// Either a constant,
union {
int64_t Int;
const ConstantFP *CFP;
const ConstantFP *getConstantFP() const { return Constant.CFP; }
const ConstantInt *getConstantInt() const { return Constant.CIP; }
MachineLocation getLoc() const { return Loc; }
- const MDNode *getVariableNode() const { return Variable; }
- DIVariable getVariable() const { return DIVariable(Variable); }
- bool isBitPiece() const { return getExpression().isBitPiece(); }
- DIExpression getExpression() const { return DIExpression(Expression); }
+ bool isBitPiece() const { return getExpression()->isBitPiece(); }
+ const DIExpression *getExpression() const { return Expression; }
friend bool operator==(const Value &, const Value &);
friend bool operator<(const Value &, const Value &);
};
}
/// \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) {
- DIExpression Expr(Values[0].Expression);
- DIVariable Var(Values[0].Variable);
- DIExpression NextExpr(Next.Values[0].Expression);
- DIVariable NextVar(Next.Values[0].Variable);
- if (Var == NextVar && Expr.isBitPiece() &&
- NextExpr.isBitPiece()) {
- addValues(Next.Values);
- End = Next.End;
- return true;
- }
- }
- return false;
- }
+ /// 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);
/// \brief Attempt to merge this DebugLocEntry with Next and return
/// true if the merge was successful. Entries can be merged if they
}) && "value must be a piece");
}
- // Sort the pieces by offset.
+ // \brief 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(),
- [](const Value &A, const Value &B) {
- return A.getVariable() == B.getVariable() &&
- A.getExpression() == B.getExpression();
- }),
- Values.end());
+ Values.erase(
+ std::unique(
+ Values.begin(), Values.end(), [](const Value &A, const Value &B) {
+ return A.getExpression() == B.getExpression();
+ }),
+ Values.end());
}
+
+ /// \brief Lower this entry into a DWARF expression.
+ void finalize(const AsmPrinter &AP, DebugLocStream::ListBuilder &List,
+ const DIBasicType *BT);
};
-/// Compare two Values for equality.
+/// \brief Compare two Values for equality.
inline bool operator==(const DebugLocEntry::Value &A,
const DebugLocEntry::Value &B) {
if (A.EntryKind != B.EntryKind)
if (A.Expression != B.Expression)
return false;
- if (A.Variable != B.Variable)
- return false;
-
switch (A.EntryKind) {
case DebugLocEntry::Value::E_Location:
return A.Loc == B.Loc;
llvm_unreachable("unhandled EntryKind");
}
-/// Compare two pieces based on their offset.
+/// \brief Compare two pieces based on their offset.
inline bool operator<(const DebugLocEntry::Value &A,
const DebugLocEntry::Value &B) {
- return A.getExpression().getBitPieceOffset() <
- B.getExpression().getBitPieceOffset();
+ return A.getExpression()->getBitPieceOffset() <
+ B.getExpression()->getBitPieceOffset();
}
}
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