[Attributor] Create getter function for the ID of the abstract attribute

[bbn]

Summary

The getIdAddr() function returns the address of the ID of the abstract attribute

[kuter]

This seems like too much code duplication.
I think we can have a macro to declare getIdAddr and the getName function.
I am curious what other people think about this.

[bbn]

In D83172#2131745, @kuter wrote:

This seems like too much code duplication.
I think we can have a macro to declare getIdAddr and the getName function.
I am curious what other people think about this.

@kuter Do you mean we can use macro inside the header file? for example, we create such macro and use it inside the declaration of the class, but I still think it is not clean.

#define AA_FUNC_GET_ID(CLASS) \
 const char *getIdAddr() const override { return &ID; }

As far as I know we the getIdAddr() function has to be declared for every AbstractAttributes, so we cannot avoid this. However, maybe we can create a macro for the actual definition of the function (like the createForPosition function)

• In header file:

struct AA {
  const char *getIdAddr() const override;

• in source file

#define AA_FUNC_GET_ID(CLASS) \
  const char *CLASS::getIdAddr() { return &ID; }

But I think such getter is short and small, and this way does not seem to reduce the code duplication...

Do you have any other ideas for this? Thanks.

[kuter]

In D83172#2131751, @bbn wrote:

@kuter Do you mean we can use macro inside the header file? for example, we create such macro and use it inside the declaration of the class, but I still think it is not clean.

I was think of having a macro inside the head file.
Attributes are going to be decleared outside of the Attributor soon.

so I think we can have a macro like this:

#define ATTRIBUTE_BOILER(CLASS)                    \
    const char *getIdAddr() { return &ID}                 \
    const std::string getName() { return #CLASS;}   \
    static const char ID;

[bbn]

Attributes are going to be decleared outside of the Attributor soon.

Do you mean that there might be other abstract attributes defined outside the AttributorAttributes.cpp ?

so I think we can have a macro like this:

#define ATTRIBUTE_BOILER(CLASS)                    \
    const char *getIdAddr() { return &ID}                 \
    const std::string getName() { return #CLASS;}   \
    static const char ID;

Yes this could work, but I am still unsure about it..... I'd also like to hear what others think about this.

[sstefan1]

In D83172#2131779, @bbn wrote:

Attributes are going to be decleared outside of the Attributor soon.

Do you mean that there might be other abstract attributes defined outside the AttributorAttributes.cpp ?

As of yesterday, there is an AA outside of AttributorAttributes :). You should rebase.

so I think we can have a macro like this:

#define ATTRIBUTE_BOILER(CLASS)                    \
    const char *getIdAddr() { return &ID}                 \
    const std::string getName() { return #CLASS;}   \
    static const char ID;

Yes this could work, but I am still unsure about it..... I'd also like to hear what others think about this.

I mean it is not that much code. Maybe I'm missing something, but why not just use ID directly?

[kuter]

In D83172#2131783, @sstefan1 wrote:

In D83172#2131779, @bbn wrote:

Attributes are going to be decleared outside of the Attributor soon.

Do you mean that there might be other abstract attributes defined outside the AttributorAttributes.cpp ?

As of yesterday, there is an AA outside of AttributorAttributes :). You should rebase.

so I think we can have a macro like this:

#define ATTRIBUTE_BOILER(CLASS)                    \
    const char *getIdAddr() { return &ID}                 \
    const std::string getName() { return #CLASS;}   \
    static const char ID;

Yes this could work, but I am still unsure about it..... I'd also like to hear what others think about this.

I mean it is not that much code. Maybe I'm missing something, but why not just use ID directly?

You can't access ID when you have a AbstactAttribute&

[bbn]

Rebased.

I think we can create a separate patch for the macro stuff.

[bbn]

Added classof function to allow cast from AbstractAttribute to specific AA

[jdoerfert]

LGTM. Merge with the unit test that tests this :)

llvm/include/llvm/Transforms/IPO/Attributor.h

struct AbstractAttribute : public IRPosition {
   virtual void print(raw_ostream &OS) const;
   void dump() const { print(dbgs()); }
 
   /// This function should return the "summarized" assumed state as string.
   virtual const std::string getAsStr() const = 0;
 
   /// This function should return the name of the AbstractAttribute
   virtual const std::string getName() const = 0;
+
+  /// This function should return the address of the ID of the AbstractAttribute
+  virtual const char *getIdAddr() const = 0;
   ///}
 
   /// Allow the Attributor access to the protected methods.
   friend struct Attributor;
 
 protected:
   /// Hook for the Attributor to trigger an update of the internal state.
   ///
struct AAReturnedValues
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAReturnedValues &createForPosition(const IRPosition &IRP,
                                              Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAReturnedValues"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAReturnedValues
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 struct AANoUnwind
     : public IRAttribute<Attribute::NoUnwind,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoUnwind(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Returns true if nounwind is assumed.
   bool isAssumedNoUnwind() const { return getAssumed(); }
 
   /// Returns true if nounwind is known.
   bool isKnownNoUnwind() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoUnwind &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoUnwind"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoUnwind
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 struct AANoSync
     : public IRAttribute<Attribute::NoSync,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoSync(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Returns true if "nosync" is assumed.
   bool isAssumedNoSync() const { return getAssumed(); }
 
   /// Returns true if "nosync" is known.
   bool isKnownNoSync() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoSync &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoSync"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoSync
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for all nonnull attributes.
 struct AANonNull
     : public IRAttribute<Attribute::NonNull,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANonNull(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if we assume that the underlying value is nonnull.
   bool isAssumedNonNull() const { return getAssumed(); }
 
   /// Return true if we know that underlying value is nonnull.
   bool isKnownNonNull() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANonNull &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANonNull"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANonNull
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract attribute for norecurse.
 struct AANoRecurse
     : public IRAttribute<Attribute::NoRecurse,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoRecurse(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if "norecurse" is assumed.
   bool isAssumedNoRecurse() const { return getAssumed(); }
 
   /// Return true if "norecurse" is known.
   bool isKnownNoRecurse() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoRecurse &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoRecurse"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoRecurse
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract attribute for willreturn.
 struct AAWillReturn
     : public IRAttribute<Attribute::WillReturn,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AAWillReturn(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if "willreturn" is assumed.
   bool isAssumedWillReturn() const { return getAssumed(); }
 
   /// Return true if "willreturn" is known.
   bool isKnownWillReturn() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAWillReturn &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAWillReturn"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AAWillReturn
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract attribute for undefined behavior.
 struct AAUndefinedBehavior
     : public StateWrapper<BooleanState, AbstractAttribute> {
   using Base = StateWrapper<BooleanState, AbstractAttribute>;
struct AAUndefinedBehavior
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAUndefinedBehavior &createForPosition(const IRPosition &IRP,
                                                 Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAUndefinedBehavior"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAUndefineBehavior
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface to determine reachability of point A to B.
 struct AAReachability : public StateWrapper<BooleanState, AbstractAttribute> {
   using Base = StateWrapper<BooleanState, AbstractAttribute>;
   AAReachability(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
struct AAReachability : public StateWrapper<BooleanState, AbstractAttribute> {
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAReachability &createForPosition(const IRPosition &IRP,
                                            Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAReachability"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAReachability
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for all noalias attributes.
 struct AANoAlias
     : public IRAttribute<Attribute::NoAlias,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoAlias(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if we assume that the underlying value is alias.
   bool isAssumedNoAlias() const { return getAssumed(); }
 
   /// Return true if we know that underlying value is noalias.
   bool isKnownNoAlias() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoAlias &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoAlias"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoAlias
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An AbstractAttribute for nofree.
 struct AANoFree
     : public IRAttribute<Attribute::NoFree,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoFree(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if "nofree" is assumed.
   bool isAssumedNoFree() const { return getAssumed(); }
 
   /// Return true if "nofree" is known.
   bool isKnownNoFree() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoFree &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoFree"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoFree
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An AbstractAttribute for noreturn.
 struct AANoReturn
     : public IRAttribute<Attribute::NoReturn,
                          StateWrapper<BooleanState, AbstractAttribute>> {
   AANoReturn(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return true if the underlying object is assumed to never return.
   bool isAssumedNoReturn() const { return getAssumed(); }
 
   /// Return true if the underlying object is known to never return.
   bool isKnownNoReturn() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoReturn &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoReturn"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoReturn
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for liveness abstract attribute.
 struct AAIsDead : public StateWrapper<BooleanState, AbstractAttribute> {
   using Base = StateWrapper<BooleanState, AbstractAttribute>;
   AAIsDead(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
public:
   /// Determine if \p F might catch asynchronous exceptions.
   static bool mayCatchAsynchronousExceptions(const Function &F) {
     return F.hasPersonalityFn() && !canSimplifyInvokeNoUnwind(&F);
   }
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAIsDead"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AAIsDead
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 
   friend struct Attributor;
 };
 
 /// State for dereferenceable attribute
 struct DerefState : AbstractState {
struct AADereferenceable
 
   /// Create an abstract attribute view for the position \p IRP.
   static AADereferenceable &createForPosition(const IRPosition &IRP,
                                               Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AADereferenceable"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AADereferenceable
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 using AAAlignmentStateType =
     IncIntegerState<uint32_t, Value::MaximumAlignment, 0>;
 /// An abstract interface for all align attributes.
 struct AAAlign : public IRAttribute<
                      Attribute::Alignment,
                      StateWrapper<AAAlignmentStateType, AbstractAttribute>> {
   AAAlign(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// Return assumed alignment.
   unsigned getAssumedAlign() const { return getAssumed(); }
 
   /// Return known alignment.
   unsigned getKnownAlign() const { return getKnown(); }
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAAlign"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AAAlign
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Create an abstract attribute view for the position \p IRP.
   static AAAlign &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for all nocapture attributes.
struct AANoCapture
   }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AANoCapture &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AANoCapture"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AANoCapture
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for value simplify abstract attribute.
 struct AAValueSimplify : public StateWrapper<BooleanState, AbstractAttribute> {
   using Base = StateWrapper<BooleanState, AbstractAttribute>;
   AAValueSimplify(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
 
   /// Return an assumed simplified value if a single candidate is found. If
   /// there cannot be one, return original value. If it is not clear yet, return
   /// the Optional::NoneType.
   virtual Optional<Value *> getAssumedSimplifiedValue(Attributor &A) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAValueSimplify &createForPosition(const IRPosition &IRP,
                                             Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAValueSimplify"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAValueSimplify
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 struct AAHeapToStack : public StateWrapper<BooleanState, AbstractAttribute> {
   using Base = StateWrapper<BooleanState, AbstractAttribute>;
   AAHeapToStack(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
 
   /// Returns true if HeapToStack conversion is assumed to be possible.
   bool isAssumedHeapToStack() const { return getAssumed(); }
 
   /// Returns true if HeapToStack conversion is known to be possible.
   bool isKnownHeapToStack() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAHeapToStack &createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAHeapToStack"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AAHeapToStack
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for privatizability.
 ///
 /// A pointer is privatizable if it can be replaced by a new, private one.
 /// Privatizing pointer reduces the use count, interaction between unrelated
struct AAPrivatizablePtr
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAPrivatizablePtr &createForPosition(const IRPosition &IRP,
                                               Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAPrivatizablePtr"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAPricatizablePtr
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for memory access kind related attributes
 /// (readnone/readonly/writeonly).
 struct AAMemoryBehavior
     : public IRAttribute<
struct AAMemoryBehavior
 
   /// Create an abstract attribute view for the position \p IRP.
   static AAMemoryBehavior &createForPosition(const IRPosition &IRP,
                                              Attributor &A);
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAMemoryBehavior"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAMemoryBehavior
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for all memory location attributes
 /// (readnone/argmemonly/inaccessiblememonly/inaccessibleorargmemonly).
 struct AAMemoryLocation
     : public IRAttribute<
struct AAMemoryLocation
   /// See AbstractState::getAsStr().
   const std::string getAsStr() const override {
     return getMemoryLocationsAsStr(getAssumedNotAccessedLocation());
   }
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAMemoryLocation"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAMemoryLocation
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// An abstract interface for range value analysis.
 struct AAValueConstantRange
     : public StateWrapper<IntegerRangeState, AbstractAttribute, uint32_t> {
   using Base = StateWrapper<IntegerRangeState, AbstractAttribute, uint32_t>;
getAssumedConstantInt(Attributor &A,
     if (RangeV.isEmptySet())
       return llvm::None;
     return nullptr;
   }
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAValueConstantRange"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is
+  /// AAValueConstantRange
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   /// Unique ID (due to the unique address)
   static const char ID;
 };
 
 /// Run options, used by the pass manager.
 enum AttributorRunOption {
   NONE = 0,
   MODULE = 1 << 0,
   CGSCC = 1 << 1,
   ALL = MODULE | CGSCC
 };
 
 } // end namespace llvm
 
 #endif // LLVM_TRANSFORMS_IPO_FUNCTIONATTRS_H

llvm/lib/Transforms/IPO/Attributor.cpp

 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/LazyValueInfo.h"
 #include "llvm/Analysis/MustExecute.h"
 #include "llvm/Analysis/ValueTracking.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/NoFolder.h"
 #include "llvm/IR/Verifier.h"
 #include "llvm/InitializePasses.h"
+#include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Utils/Local.h"
 
 #include <cassert>
 
 using namespace llvm;
 

llvm/lib/Transforms/IPO/OpenMPOpt.cpp

struct AAICVTracker : public StateWrapper<BooleanState, AbstractAttribute> {
 
   /// Return the value with which \p I can be replaced for specific \p ICV.
   virtual Value *getReplacementValue(InternalControlVar ICV,
                                      const Instruction *I, Attributor &A) = 0;
 
   /// See AbstractAttribute::getName()
   const std::string getName() const override { return "AAICVTracker"; }
 
+  /// See AbstractAttribute::getIdAddr()
+  const char *getIdAddr() const override { return &ID; }
+
+  /// This function should return true if the type of the \p AA is AAICVTracker
+  static bool classof(const AbstractAttribute *AA) {
+    return (AA->getIdAddr() == &ID);
+  }
+
   static const char ID;
 };
 
 struct AAICVTrackerFunction : public AAICVTracker {
   AAICVTrackerFunction(const IRPosition &IRP, Attributor &A)
       : AAICVTracker(IRP, A) {}
 
   // FIXME: come up with better string.