class AliasAnalysis;
class LoadInst;
class StoreInst;
-class FreeInst;
class VAArgInst;
class AliasSetTracker;
class AliasSet;
Value *Val; // The pointer this record corresponds to.
PointerRec **PrevInList, *NextInList;
AliasSet *AS;
- unsigned Size;
+ uint64_t Size;
+ const MDNode *TBAAInfo;
public:
PointerRec(Value *V)
- : Val(V), PrevInList(0), NextInList(0), AS(0), Size(0) {}
+ : Val(V), PrevInList(0), NextInList(0), AS(0), Size(0),
+ TBAAInfo(DenseMapInfo<const MDNode *>::getEmptyKey()) {}
Value *getValue() const { return Val; }
return &NextInList;
}
- void updateSize(unsigned NewSize) {
+ void updateSizeAndTBAAInfo(uint64_t NewSize, const MDNode *NewTBAAInfo) {
if (NewSize > Size) Size = NewSize;
+
+ if (TBAAInfo == DenseMapInfo<const MDNode *>::getEmptyKey())
+ // We don't have a TBAAInfo yet. Set it to NewTBAAInfo.
+ TBAAInfo = NewTBAAInfo;
+ else if (TBAAInfo != NewTBAAInfo)
+ // NewTBAAInfo conflicts with TBAAInfo.
+ TBAAInfo = DenseMapInfo<const MDNode *>::getTombstoneKey();
}
- unsigned getSize() const { return Size; }
+ uint64_t getSize() const { return Size; }
+
+ /// getTBAAInfo - Return the TBAAInfo, or null if there is no
+ /// information or conflicting information.
+ const MDNode *getTBAAInfo() const {
+ // If we have missing or conflicting TBAAInfo, return null.
+ if (TBAAInfo == DenseMapInfo<const MDNode *>::getEmptyKey() ||
+ TBAAInfo == DenseMapInfo<const MDNode *>::getTombstoneKey())
+ return 0;
+ return TBAAInfo;
+ }
AliasSet *getAliasSet(AliasSetTracker &AST) {
assert(AS && "No AliasSet yet!");
AliasSet *Forward; // Forwarding pointer.
AliasSet *Next, *Prev; // Doubly linked list of AliasSets.
- std::vector<CallSite> CallSites; // All calls & invokes in this alias set.
+ // All instructions without a specific address in this alias set.
+ std::vector<AssertingVH<Instruction> > UnknownInsts;
// RefCount - Number of nodes pointing to this AliasSet plus the number of
// AliasSets forwarding to it.
removeFromTracker(AST);
}
+ Instruction *getUnknownInst(unsigned i) const {
+ assert(i < UnknownInsts.size());
+ return UnknownInsts[i];
+ }
+
public:
/// Accessors...
bool isRef() const { return AccessTy & Refs; }
value_type *operator->() const { return &operator*(); }
Value *getPointer() const { return CurNode->getValue(); }
- unsigned getSize() const { return CurNode->getSize(); }
+ uint64_t getSize() const { return CurNode->getSize(); }
+ const MDNode *getTBAAInfo() const { return CurNode->getTBAAInfo(); }
iterator& operator++() { // Preincrement
assert(CurNode && "Advancing past AliasSet.end()!");
void removeFromTracker(AliasSetTracker &AST);
- void addPointer(AliasSetTracker &AST, PointerRec &Entry, unsigned Size,
+ void addPointer(AliasSetTracker &AST, PointerRec &Entry, uint64_t Size,
+ const MDNode *TBAAInfo,
bool KnownMustAlias = false);
- void addCallSite(CallSite CS, AliasAnalysis &AA);
- void removeCallSite(CallSite CS) {
- for (size_t i = 0, e = CallSites.size(); i != e; ++i)
- if (CallSites[i].getInstruction() == CS.getInstruction()) {
- CallSites[i] = CallSites.back();
- CallSites.pop_back();
+ void addUnknownInst(Instruction *I, AliasAnalysis &AA);
+ void removeUnknownInst(Instruction *I) {
+ for (size_t i = 0, e = UnknownInsts.size(); i != e; ++i)
+ if (UnknownInsts[i] == I) {
+ UnknownInsts[i] = UnknownInsts.back();
+ UnknownInsts.pop_back();
+ --i; --e; // Revisit the moved entry.
}
}
void setVolatile() { Volatile = true; }
/// aliasesPointer - Return true if the specified pointer "may" (or must)
/// alias one of the members in the set.
///
- bool aliasesPointer(const Value *Ptr, unsigned Size, AliasAnalysis &AA) const;
- bool aliasesCallSite(CallSite CS, AliasAnalysis &AA) const;
+ bool aliasesPointer(const Value *Ptr, uint64_t Size, const MDNode *TBAAInfo,
+ AliasAnalysis &AA) const;
+ bool aliasesUnknownInst(Instruction *Inst, AliasAnalysis &AA) const;
};
inline raw_ostream& operator<<(raw_ostream &OS, const AliasSet &AS) {
class ASTCallbackVH : public CallbackVH {
AliasSetTracker *AST;
virtual void deleted();
+ virtual void allUsesReplacedWith(Value *);
public:
ASTCallbackVH(Value *V, AliasSetTracker *AST = 0);
ASTCallbackVH &operator=(Value *V);
};
- /// ASTCallbackVHDenseMapInfo - Traits to tell DenseMap that ASTCallbackVH
- /// is not a POD (it needs its destructor called).
- struct ASTCallbackVHDenseMapInfo : public DenseMapInfo<Value *> {
- static bool isPod() { return false; }
- };
+ /// ASTCallbackVHDenseMapInfo - Traits to tell DenseMap that tell us how to
+ /// compare and hash the value handle.
+ struct ASTCallbackVHDenseMapInfo : public DenseMapInfo<Value *> {};
AliasAnalysis &AA;
ilist<AliasSet> AliasSets;
/// These methods return true if inserting the instruction resulted in the
/// addition of a new alias set (i.e., the pointer did not alias anything).
///
- bool add(Value *Ptr, unsigned Size); // Add a location
+ bool add(Value *Ptr, uint64_t Size, const MDNode *TBAAInfo); // Add a location
bool add(LoadInst *LI);
bool add(StoreInst *SI);
- bool add(FreeInst *FI);
bool add(VAArgInst *VAAI);
- bool add(CallSite CS); // Call/Invoke instructions
- bool add(CallInst *CI) { return add(CallSite(CI)); }
- bool add(InvokeInst *II) { return add(CallSite(II)); }
bool add(Instruction *I); // Dispatch to one of the other add methods...
void add(BasicBlock &BB); // Add all instructions in basic block
void add(const AliasSetTracker &AST); // Add alias relations from another AST
+ bool addUnknown(Instruction *I);
/// remove methods - These methods are used to remove all entries that might
/// be aliased by the specified instruction. These methods return true if any
/// alias sets were eliminated.
- bool remove(Value *Ptr, unsigned Size); // Remove a location
+ // Remove a location
+ bool remove(Value *Ptr, uint64_t Size, const MDNode *TBAAInfo);
bool remove(LoadInst *LI);
bool remove(StoreInst *SI);
- bool remove(FreeInst *FI);
bool remove(VAArgInst *VAAI);
- bool remove(CallSite CS);
- bool remove(CallInst *CI) { return remove(CallSite(CI)); }
- bool remove(InvokeInst *II) { return remove(CallSite(II)); }
bool remove(Instruction *I);
void remove(AliasSet &AS);
+ bool removeUnknown(Instruction *I);
void clear();
/// lives in. If the New argument is non-null, this method sets the value to
/// true if a new alias set is created to contain the pointer (because the
/// pointer didn't alias anything).
- AliasSet &getAliasSetForPointer(Value *P, unsigned Size, bool *New = 0);
+ AliasSet &getAliasSetForPointer(Value *P, uint64_t Size,
+ const MDNode *TBAAInfo,
+ bool *New = 0);
/// getAliasSetForPointerIfExists - Return the alias set containing the
/// location specified if one exists, otherwise return null.
- AliasSet *getAliasSetForPointerIfExists(Value *P, unsigned Size) {
- return findAliasSetForPointer(P, Size);
+ AliasSet *getAliasSetForPointerIfExists(Value *P, uint64_t Size,
+ const MDNode *TBAAInfo) {
+ return findAliasSetForPointer(P, Size, TBAAInfo);
}
/// containsPointer - Return true if the specified location is represented by
/// this alias set, false otherwise. This does not modify the AST object or
/// alias sets.
- bool containsPointer(Value *P, unsigned Size) const;
+ bool containsPointer(Value *P, uint64_t Size, const MDNode *TBAAInfo) const;
/// getAliasAnalysis - Return the underlying alias analysis object used by
/// this tracker.
return *Entry;
}
- AliasSet &addPointer(Value *P, unsigned Size, AliasSet::AccessType E,
+ AliasSet &addPointer(Value *P, uint64_t Size, const MDNode *TBAAInfo,
+ AliasSet::AccessType E,
bool &NewSet) {
NewSet = false;
- AliasSet &AS = getAliasSetForPointer(P, Size, &NewSet);
+ AliasSet &AS = getAliasSetForPointer(P, Size, TBAAInfo, &NewSet);
AS.AccessTy |= E;
return AS;
}
- AliasSet *findAliasSetForPointer(const Value *Ptr, unsigned Size);
+ AliasSet *findAliasSetForPointer(const Value *Ptr, uint64_t Size,
+ const MDNode *TBAAInfo);
- AliasSet *findAliasSetForCallSite(CallSite CS);
+ AliasSet *findAliasSetForUnknownInst(Instruction *Inst);
};
inline raw_ostream& operator<<(raw_ostream &OS, const AliasSetTracker &AST) {
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