//
/// \brief Compute the size of the object pointed by Ptr. Returns true and the
-/// object size in Size if successful, and false otherwise.
+/// object size in Size if successful, and false otherwise. In this context, by
+/// object we mean the region of memory starting at Ptr to the end of the
+/// underlying object pointed to by Ptr.
/// If RoundToAlign is true, then Size is rounded up to the aligment of allocas,
/// byval arguments, and global variables.
bool getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout *TD,
class ObjectSizeOffsetVisitor
: public InstVisitor<ObjectSizeOffsetVisitor, SizeOffsetType> {
- typedef DenseMap<const Value*, SizeOffsetType> CacheMapTy;
-
const DataLayout *TD;
const TargetLibraryInfo *TLI;
bool RoundToAlign;
unsigned IntTyBits;
APInt Zero;
- CacheMapTy CacheMap;
+ SmallPtrSet<Instruction *, 8> SeenInsts;
APInt align(APInt Size, uint64_t Align);