On February 9, 2018 7:07:45 PM GMT+01:00, Jakub Jelinek <ja...@redhat.com> 
>On Fri, Feb 09, 2018 at 07:01:08PM +0100, Richard Biener wrote:
>> >which indeed fixes the testcase and seems not to break asan.exp.
>> Huh. Need to double check why that makes sense ;) 
>I think it does, for both ASAN_CHECK and ASAN_MARK the pointer argument
>is the second one, the first one is an integer argument with flags.
>And ASAN_MARK, both poison and unpoison, works kind like a clobber on
>referenced variable, before unpoison it is generally inaccessible and
>poison too.

Ah, indeed. 


>       Jakub

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