[LLVMdev] AliasSetTracker

[Marcus Hicks]

I started using the AliasSetTracker, but I have a problem.

I am using -basicaa -anders-aa and optimizations are enabled for llvm-gcc
and llvm-ld.
I use an instruction visitor to populate the alias set tracker, but two
pointers end up in different alias sets.
While investigating this I notice at one point that if I call:

bool New = false;
AliasSet &X = AST->getAliasSetForPointer(Pointer, Size, &New);

After this call, New is true
but AST->containsPointer(Pointer, Size) is false! Shouldn't it be true at
this point?

If I call again getAliasSetForPointer after resetting New, it remains false,
as I expect it after the first call.

But AST->getAliasSetForPointerIfExists(Pointer, Size) returns null. Again,
shouldn't it return the same alias set as the first call?

Am I misunderstanding something? This seems to work without optimizations or
without -anders-aa.

Using revision 79271

Best regards,
Marcus
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