/usr/include/llvm-3.9/llvm/IR/ModuleSlotTracker.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | //===-- llvm/IR/ModuleSlotTracker.h -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_MODULESLOTTRACKER_H
#define LLVM_IR_MODULESLOTTRACKER_H
#include <memory>
namespace llvm {
class Module;
class Function;
class SlotTracker;
class Value;
/// Manage lifetime of a slot tracker for printing IR.
///
/// Wrapper around the \a SlotTracker used internally by \a AsmWriter. This
/// class allows callers to share the cost of incorporating the metadata in a
/// module or a function.
///
/// If the IR changes from underneath \a ModuleSlotTracker, strings like
/// "<badref>" will be printed, or, worse, the wrong slots entirely.
class ModuleSlotTracker {
/// Storage for a slot tracker.
std::unique_ptr<SlotTracker> MachineStorage;
bool ShouldCreateStorage = false;
bool ShouldInitializeAllMetadata = false;
const Module *M = nullptr;
const Function *F = nullptr;
SlotTracker *Machine = nullptr;
public:
/// Wrap a preinitialized SlotTracker.
ModuleSlotTracker(SlotTracker &Machine, const Module *M,
const Function *F = nullptr);
/// Construct a slot tracker from a module.
///
/// If \a M is \c nullptr, uses a null slot tracker. Otherwise, initializes
/// a slot tracker, and initializes all metadata slots. \c
/// ShouldInitializeAllMetadata defaults to true because this is expected to
/// be shared between multiple callers, and otherwise MDNode references will
/// not match up.
explicit ModuleSlotTracker(const Module *M,
bool ShouldInitializeAllMetadata = true);
/// Destructor to clean up storage.
~ModuleSlotTracker();
/// Lazily creates a slot tracker.
SlotTracker *getMachine();
const Module *getModule() const { return M; }
const Function *getCurrentFunction() const { return F; }
/// Incorporate the given function.
///
/// Purge the currently incorporated function and incorporate \c F. If \c F
/// is currently incorporated, this is a no-op.
void incorporateFunction(const Function &F);
/// Return the slot number of the specified local value.
///
/// A function that defines this value should be incorporated prior to calling
/// this method.
/// Return -1 if the value is not in the function's SlotTracker.
int getLocalSlot(const Value *V);
};
} // end namespace llvm
#endif
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