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//===- DebugLoc.h - Debug Location Information ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a number of light weight data structures used
// to describe and track debug location information.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_DEBUGLOC_H
#define LLVM_IR_DEBUGLOC_H
#include "llvm/Support/DataTypes.h"
namespace llvm {
template <typename T> struct DenseMapInfo;
class MDNode;
class LLVMContext;
/// DebugLoc - Debug location id. This is carried by Instruction, SDNode,
/// and MachineInstr to compactly encode file/line/scope information for an
/// operation.
class DebugLoc {
friend struct DenseMapInfo<DebugLoc>;
/// getEmptyKey() - A private constructor that returns an unknown that is
/// not equal to the tombstone key or DebugLoc().
static DebugLoc getEmptyKey() {
DebugLoc DL;
DL.LineCol = 1;
return DL;
}
/// getTombstoneKey() - A private constructor that returns an unknown that
/// is not equal to the empty key or DebugLoc().
static DebugLoc getTombstoneKey() {
DebugLoc DL;
DL.LineCol = 2;
return DL;
}
/// LineCol - This 32-bit value encodes the line and column number for the
/// location, encoded as 24-bits for line and 8 bits for col. A value of 0
/// for either means unknown.
uint32_t LineCol;
/// ScopeIdx - This is an opaque ID# for Scope/InlinedAt information,
/// decoded by LLVMContext. 0 is unknown.
int ScopeIdx;
public:
DebugLoc() : LineCol(0), ScopeIdx(0) {} // Defaults to unknown.
/// get - Get a new DebugLoc that corresponds to the specified line/col
/// scope/inline location.
static DebugLoc get(unsigned Line, unsigned Col,
MDNode *Scope, MDNode *InlinedAt = 0);
/// getFromDILocation - Translate the DILocation quad into a DebugLoc.
static DebugLoc getFromDILocation(MDNode *N);
/// getFromDILexicalBlock - Translate the DILexicalBlock into a DebugLoc.
static DebugLoc getFromDILexicalBlock(MDNode *N);
/// isUnknown - Return true if this is an unknown location.
bool isUnknown() const { return ScopeIdx == 0; }
unsigned getLine() const {
return (LineCol << 8) >> 8; // Mask out column.
}
unsigned getCol() const {
return LineCol >> 24;
}
/// getScope - This returns the scope pointer for this DebugLoc, or null if
/// invalid.
MDNode *getScope(const LLVMContext &Ctx) const;
/// getInlinedAt - This returns the InlinedAt pointer for this DebugLoc, or
/// null if invalid or not present.
MDNode *getInlinedAt(const LLVMContext &Ctx) const;
/// getScopeAndInlinedAt - Return both the Scope and the InlinedAt values.
void getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
const LLVMContext &Ctx) const;
/// getScopeNode - Get MDNode for DebugLoc's scope, or null if invalid.
MDNode *getScopeNode(const LLVMContext &Ctx) const;
// getFnDebugLoc - Walk up the scope chain of given debug loc and find line
// number info for the function.
DebugLoc getFnDebugLoc(const LLVMContext &Ctx);
/// getAsMDNode - This method converts the compressed DebugLoc node into a
/// DILocation compatible MDNode.
MDNode *getAsMDNode(const LLVMContext &Ctx) const;
bool operator==(const DebugLoc &DL) const {
return LineCol == DL.LineCol && ScopeIdx == DL.ScopeIdx;
}
bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
void dump(const LLVMContext &Ctx) const;
};
template <>
struct DenseMapInfo<DebugLoc> {
static DebugLoc getEmptyKey() { return DebugLoc::getEmptyKey(); }
static DebugLoc getTombstoneKey() { return DebugLoc::getTombstoneKey(); }
static unsigned getHashValue(const DebugLoc &Key);
static bool isEqual(DebugLoc LHS, DebugLoc RHS) { return LHS == RHS; }
};
} // end namespace llvm
#endif /* LLVM_SUPPORT_DEBUGLOC_H */
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