[Patch][OpenCL] Custom atomic Builtin check ignores address space of a non-atomic pointer

[Anastasia Stulova via cfe-commits]

I have just made one minor update in the CodeGen test (test/CodeGen/atomic-ops.c) that is now checking the IR output rather than only making sure frontend doesn't crash.

The final patch is attached here!

Thanks,
Anastasia
 

-----Original Message-----
From: Pekka Jääskeläinen [mailto:pekka.jaaskelainen at tut.fi] 
Sent: 02 October 2015 10:20
To: Anastasia Stulova; cfe-commits at lists.llvm.org
Subject: Re: [Patch][OpenCL] Custom atomic Builtin check ignores address space of a non-atomic pointer

LGTM.

Related to it:
There has been so many getPointerTo() issues with multi-AS in the past that I wonder if it'd be time to drop the default value from it, and go through all the places where it's called with the default AS, thus breaking multi-AS.  Might be a worthwhile job to do at some point.

On 09/30/2015 01:23 PM, Anastasia Stulova via cfe-commits wrote:
> Hi all,
>
> Address spaces are not handled in custom semantic checks of atomic Builtins.
>
> If there are two pointers passed to the Builtin, it doesn't allow the 
> second
>
> (non-atomic) one to be qualified with an address space.
>
> This patch removed this restriction by recording the address space of 
> the
>
> passed pointers while checking its type correctness.
>
> Currently, the following code:
>
> _Atomic int __attribute__((address_space(1))) *A;
>
> int __attribute__((address_space(2))) *B;
>
> ...
>
> ... = __c11_atomic_compare_exchange_strong(A, B, 1, 
> memory_order_seq_cst, memory_order_seq_cst);
>
> fails to compile with an error:
>
> "passing '__attribute__((address_space(2))) int *' to parameter of 
> type 'int *' changes address space of pointer".
>
> Please, review the attached fix for it!
>
> Cheers,
>
> Anastasia
>
>
>
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--
Pekka

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