[llvm-dev] TBAA falsely reporting may alias?

Daniel Berlin via llvm-dev llvm-dev at lists.llvm.org
Fri Apr 14 07:52:10 PDT 2017

On Fri, Apr 14, 2017 at 6:12 AM, Hal Finkel via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> On 04/14/2017 08:03 AM, Kavon Farvardin via llvm-dev wrote:
>> Thanks for the explanation Sanjoy!
>> Another question I have is: are there are any passes that invalidate or
>> make the TBAA analysis information less precise?
> Some transformation drop TBAA information when they might invalidate it,
> but it should be preserved in most places.
FWIW, I believe some folks at Google in a different group have come to the
conclusion it is dropped in about 20-30% of cases.
(I said "file bugs")
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