add getUnderlyingObjectSize()

this is similar to getObjectSize(), but doesnt subtract the offset
tweak the BasicAA code accordingly (per PR14988)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2013-03-02 11:23:34 +00:00
parent 5f0d9dbdf4
commit 2bc689c846
3 changed files with 29 additions and 30 deletions

View File

@ -144,6 +144,14 @@ static inline CallInst *isFreeCall(Value *I, const TargetLibraryInfo *TLI) {
bool getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout *TD,
const TargetLibraryInfo *TLI, bool RoundToAlign = false);
/// \brief Compute the size of the underlying object pointed by Ptr. Returns
/// true and the object size in Size if successful, and false otherwise.
/// If RoundToAlign is true, then Size is rounded up to the aligment of allocas,
/// byval arguments, and global variables.
bool getUnderlyingObjectSize(const Value *Ptr, uint64_t &Size,
const DataLayout *TD, const TargetLibraryInfo *TLI,
bool RoundToAlign = false);
typedef std::pair<APInt, APInt> SizeOffsetType;