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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.
#include "llvm/IR/TrackingMDRef.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
class LLVMContext;
class raw_ostream;
class DILocation;
/// \brief A debug info location.
/// This class is a wrapper around a tracking reference to an \a DILocation
/// pointer.
/// To avoid extra includes, \a DebugLoc doubles the \a DILocation API with a
/// one based on relatively opaque \a MDNode pointers.
class DebugLoc {
TrackingMDNodeRef Loc;
DebugLoc() = default;
/// \brief Construct from an \a DILocation.
DebugLoc(const DILocation *L);
/// \brief Construct from an \a MDNode.
/// Note: if \c N is not an \a DILocation, a verifier check will fail, and
/// accessors will crash. However, construction from other nodes is
/// supported in order to handle forward references when reading textual
/// IR.
explicit DebugLoc(const MDNode *N);
/// \brief Get the underlying \a DILocation.
/// \pre !*this or \c isa<DILocation>(getAsMDNode()).
/// @{
DILocation *get() const;
operator DILocation *() const { return get(); }
DILocation *operator->() const { return get(); }
DILocation &operator*() const { return *get(); }
/// @}
/// \brief Check for null.
/// Check for null in a way that is safe with broken debug info. Unlike
/// the conversion to \c DILocation, this doesn't require that \c Loc is of
/// the right type. Important for cases like \a llvm::StripDebugInfo() and
/// \a Instruction::hasMetadata().
explicit operator bool() const { return Loc; }
/// \brief Check whether this has a trivial destructor.
bool hasTrivialDestructor() const { return Loc.hasTrivialDestructor(); }
/// \brief Create a new DebugLoc.
/// Create a new DebugLoc at the specified line/col and scope/inline. This
/// forwards to \a DILocation::get().
/// If \c !Scope, returns a default-constructed \a DebugLoc.
/// FIXME: Remove this. Users should use DILocation::get().
static DebugLoc get(unsigned Line, unsigned Col, const MDNode *Scope,
const MDNode *InlinedAt = nullptr);
enum { ReplaceLastInlinedAt = true };
/// Rebuild the entire inlined-at chain for this instruction so that the top of
/// the chain now is inlined-at the new call site.
/// \param InlinedAt The new outermost inlined-at in the chain.
/// \param ReplaceLast Replace the last location in the inlined-at chain.
static DebugLoc appendInlinedAt(DebugLoc DL, DILocation *InlinedAt,
LLVMContext &Ctx,
DenseMap<const MDNode *, MDNode *> &Cache,
bool ReplaceLast = false);
unsigned getLine() const;
unsigned getCol() const;
MDNode *getScope() const;
DILocation *getInlinedAt() const;
/// \brief Get the fully inlined-at scope for a DebugLoc.
/// Gets the inlined-at scope for a DebugLoc.
MDNode *getInlinedAtScope() const;
/// \brief Find the debug info location for the start of the function.
/// Walk up the scope chain of given debug loc and find line number info
/// for the function.
/// FIXME: Remove this. Users should use DILocation/DILocalScope API to
/// find the subprogram, and then DILocation::get().
DebugLoc getFnDebugLoc() const;
/// \brief Return \c this as a bar \a MDNode.
MDNode *getAsMDNode() const { return Loc; }
bool operator==(const DebugLoc &DL) const { return Loc == DL.Loc; }
bool operator!=(const DebugLoc &DL) const { return Loc != DL.Loc; }
void dump() const;
/// \brief prints source location /path/to/file.exe:line:col @[inlined at]
void print(raw_ostream &OS) const;
} // end namespace llvm