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Subject: Re: [PATCH][testsuite, nvptx] Add effective target sync_int_long_stack
From: Mike Stump <mikestump@comcast.net>
In-Reply-To: <20200812135722.GA18324@delia>
Date: Tue, 18 Aug 2020 21:35:10 -0700
Cc: gcc-patches@gcc.gnu.org
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To: Tom de Vries <tdevries@suse.de>
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On Aug 12, 2020, at 6:57 AM, Tom de Vries <tdevries@suse.de> wrote:
>=20
> The nvptx target currently doesn't support effective target =
sync_int_long,
> although it has support for 32-bit and 64-bit atomic.
>=20
> When enabling sync_int_long for nvptx, we run into a failure in
> gcc.dg/pr86314.c:
> ...
> nvptx-run: error getting kernel result: operation not supported on \
>   global/shared address space
> ...
> due to a ptx restriction:  accesses to local memory are illegal, and =
the
> test-case does an atomic operation on a stack address, which is mapped =
to
> local memory.
>=20
> Fix this by adding a target sync_int_long_stack, wich returns false =
for nvptx,
> which can be used to mark test-cases that require sync_int_long =
support for
> stack address.
>=20
> Build on nvptx and tested with make check-gcc.
>=20
> OK for trunk?

Ok.