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f26ac76f38
This was rL304226, reverted in 304228 due to a clang assertion failure on the build bots. That problem should have been addressed by clang commit rL304470. llvm-svn: 304488
127 lines
4.4 KiB
C++
127 lines
4.4 KiB
C++
//===- DebugLoc.h - Debug Location Information ------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a number of light weight data structures used
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// to describe and track debug location information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_DEBUGLOC_H
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#define LLVM_IR_DEBUGLOC_H
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#include "llvm/IR/TrackingMDRef.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class LLVMContext;
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class raw_ostream;
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class DILocation;
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/// \brief A debug info location.
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///
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/// This class is a wrapper around a tracking reference to an \a DILocation
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/// pointer.
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///
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/// To avoid extra includes, \a DebugLoc doubles the \a DILocation API with a
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/// one based on relatively opaque \a MDNode pointers.
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class DebugLoc {
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TrackingMDNodeRef Loc;
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public:
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DebugLoc() = default;
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/// \brief Construct from an \a DILocation.
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DebugLoc(const DILocation *L);
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/// \brief Construct from an \a MDNode.
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///
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/// Note: if \c N is not an \a DILocation, a verifier check will fail, and
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/// accessors will crash. However, construction from other nodes is
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/// supported in order to handle forward references when reading textual
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/// IR.
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explicit DebugLoc(const MDNode *N);
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/// \brief Get the underlying \a DILocation.
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///
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/// \pre !*this or \c isa<DILocation>(getAsMDNode()).
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/// @{
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DILocation *get() const;
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operator DILocation *() const { return get(); }
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DILocation *operator->() const { return get(); }
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DILocation &operator*() const { return *get(); }
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/// @}
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/// \brief Check for null.
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///
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/// Check for null in a way that is safe with broken debug info. Unlike
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/// the conversion to \c DILocation, this doesn't require that \c Loc is of
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/// the right type. Important for cases like \a llvm::StripDebugInfo() and
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/// \a Instruction::hasMetadata().
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explicit operator bool() const { return Loc; }
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/// \brief Check whether this has a trivial destructor.
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bool hasTrivialDestructor() const { return Loc.hasTrivialDestructor(); }
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/// \brief Create a new DebugLoc.
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///
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/// Create a new DebugLoc at the specified line/col and scope/inline. This
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/// forwards to \a DILocation::get().
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///
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/// If \c !Scope, returns a default-constructed \a DebugLoc.
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///
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/// FIXME: Remove this. Users should use DILocation::get().
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static DebugLoc get(unsigned Line, unsigned Col, const MDNode *Scope,
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const MDNode *InlinedAt = nullptr);
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enum { ReplaceLastInlinedAt = true };
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/// Rebuild the entire inlined-at chain for this instruction so that the top of
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/// the chain now is inlined-at the new call site.
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/// \param InlinedAt The new outermost inlined-at in the chain.
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/// \param ReplaceLast Replace the last location in the inlined-at chain.
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static DebugLoc appendInlinedAt(DebugLoc DL, DILocation *InlinedAt,
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LLVMContext &Ctx,
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DenseMap<const MDNode *, MDNode *> &Cache,
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bool ReplaceLast = false);
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unsigned getLine() const;
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unsigned getCol() const;
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MDNode *getScope() const;
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DILocation *getInlinedAt() const;
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/// \brief Get the fully inlined-at scope for a DebugLoc.
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///
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/// Gets the inlined-at scope for a DebugLoc.
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MDNode *getInlinedAtScope() const;
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/// \brief Find the debug info location for the start of the function.
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///
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/// Walk up the scope chain of given debug loc and find line number info
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/// for the function.
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///
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/// FIXME: Remove this. Users should use DILocation/DILocalScope API to
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/// find the subprogram, and then DILocation::get().
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DebugLoc getFnDebugLoc() const;
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/// \brief Return \c this as a bar \a MDNode.
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MDNode *getAsMDNode() const { return Loc; }
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bool operator==(const DebugLoc &DL) const { return Loc == DL.Loc; }
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bool operator!=(const DebugLoc &DL) const { return Loc != DL.Loc; }
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void dump() const;
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/// \brief prints source location /path/to/file.exe:line:col @[inlined at]
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void print(raw_ostream &OS) const;
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};
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} // end namespace llvm
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#endif /* LLVM_SUPPORT_DEBUGLOC_H */
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