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//===- DebugLoc.h - Debug Location Information ------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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/IR/TrackingMDRef.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
class LLVMContext;
class raw_ostream;
class DILocation;
/// 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;
public:
DebugLoc() = default;
/// Construct from an \a DILocation.
DebugLoc(const DILocation *L);
/// 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);
/// 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(); }
/// @}
/// 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; }
/// Check whether this has a trivial destructor.
bool hasTrivialDestructor() const { return Loc.hasTrivialDestructor(); }
/// 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,
bool ImplicitCode = false);
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;
/// Get the fully inlined-at scope for a DebugLoc.
///
/// Gets the inlined-at scope for a DebugLoc.
MDNode *getInlinedAtScope() const;
/// 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;
/// Return \c this as a bar \a MDNode.
MDNode *getAsMDNode() const { return Loc; }
/// Check if the DebugLoc corresponds to an implicit code.
bool isImplicitCode() const;
void setImplicitCode(bool ImplicitCode);
bool operator==(const DebugLoc &DL) const { return Loc == DL.Loc; }
bool operator!=(const DebugLoc &DL) const { return Loc != DL.Loc; }
void dump() const;
/// prints source location /path/to/file.exe:line:col @[inlined at]
void print(raw_ostream &OS) const;
};
} // end namespace llvm
#endif /* LLVM_SUPPORT_DEBUGLOC_H */
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