On Sat, Dec 19, 2015 at 9:18 PM, Rob Clark <robdcl...@gmail.com> wrote:
> Note that this is *only* about the header files.. not the src files.
> I'm not proposing to make NIR support C90.
Why would you need to only make the header filef C90 compliant? If you
just need to pass around a nir_shader * or something, you can just use
a forward declaration.
>
> I will at some point, before it is ready to merge, need to arrange the
> NIR related bits in mesa st so that we can build without it, for
> benefit of the MSVC folks.
>
> (It might be useful someday to use NIR more extensively in mesa st,
> and use nir->tgsi pass, so we can do all the opt passes in NIR..
> although that is *way* more ambitious than what I want to do right
> now. With any luck, by the time we get to that point, we can rely on
> a less braindead version of MSVC?)
My understanding is that mesa/st doesn't need to be built with old
MSVC, just gallium.
>
> BR,
> -R
>
> On Sat, Dec 19, 2015 at 8:58 PM, Connor Abbott <cwabbo...@gmail.com> wrote:
>> We haven't allowed NIR in core gallium before, since core gallium has
>> to be built with some old version of MSVC that doesn't support many
>> C99 features that we really wanted to use. The only reason that
>> -Werror exists is for compatibility with old MSVC, and if you want to
>> use NIR with something that needs to build with old MSVC, there are
>> going to be much bigger changes needed, and we'd rather avoid that. If
>> you just want to add some NIR-specific stuff that e.g. softpipe
>> doesn't need to compile against, then you should fix the build system
>> not to add the warning.
>>
>> On Sat, Dec 19, 2015 at 5:39 PM, Rob Clark <robdcl...@gmail.com> wrote:
>>> From: Rob Clark <robcl...@freedesktop.org>
>>>
>>> We are going to start using nir_builder.h from some gallium code, which
>>> is currently only C90. Which results in:
>>>
>>> In file included from nir/nir_emulate.c:26:0:
>>> ../../../src/glsl/nir/nir_builder.h: In function ‘nir_build_alu’:
>>> ../../../src/glsl/nir/nir_builder.h:132:4: error: ISO C90 forbids mixed
>>> declarations and code [-Werror=declaration-after-statement]
>>> unsigned num_components = op_info->output_size;
>>> ^
>>> In file included from nir/nir_emulate.c:26:0:
>>> ../../../src/glsl/nir/nir_builder.h: In function ‘nir_ssa_for_src’:
>>> ../../../src/glsl/nir/nir_builder.h:271:4: error: ISO C90 forbids mixed
>>> declarations and code [-Werror=declaration-after-statement]
>>> nir_alu_src alu = { NIR_SRC_INIT };
>>> ^
>>> cc1: some warnings being treated as errors
>>>
>>> Signed-off-by: Rob Clark <robcl...@freedesktop.org>
>>> ---
>>> Not sure if I should just go ahead and push this sort of thing. Or
>>> if we can start requiring C99 for gallium?
>>>
>>> src/glsl/nir/nir_builder.h | 7 +++++--
>>> 1 file changed, 5 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/src/glsl/nir/nir_builder.h b/src/glsl/nir/nir_builder.h
>>> index 332bb02..6f30306 100644
>>> --- a/src/glsl/nir/nir_builder.h
>>> +++ b/src/glsl/nir/nir_builder.h
>>> @@ -115,6 +115,8 @@ nir_build_alu(nir_builder *build, nir_op op,
>>> nir_ssa_def *src0,
>>> {
>>> const nir_op_info *op_info = &nir_op_infos[op];
>>> nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
>>> + unsigned num_components;
>>> +
>>> if (!instr)
>>> return NULL;
>>>
>>> @@ -129,7 +131,7 @@ nir_build_alu(nir_builder *build, nir_op op,
>>> nir_ssa_def *src0,
>>> /* Guess the number of components the destination temporary should have
>>> * based on our input sizes, if it's not fixed for the op.
>>> */
>>> - unsigned num_components = op_info->output_size;
>>> + num_components = op_info->output_size;
>>> if (num_components == 0) {
>>> for (unsigned i = 0; i < op_info->num_inputs; i++) {
>>> if (op_info->input_sizes[i] == 0)
>>> @@ -265,10 +267,11 @@ nir_channel(nir_builder *b, nir_ssa_def *def,
>>> unsigned c)
>>> static inline nir_ssa_def *
>>> nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
>>> {
>>> + nir_alu_src alu = { NIR_SRC_INIT };
>>> +
>>> if (src.is_ssa && src.ssa->num_components == num_components)
>>> return src.ssa;
>>>
>>> - nir_alu_src alu = { NIR_SRC_INIT };
>>> alu.src = src;
>>> for (int j = 0; j < 4; j++)
>>> alu.swizzle[j] = j;
>>> --
>>> 2.5.0
>>>
>>> _______________________________________________
>>> mesa-dev mailing list
>>> mesa-dev@lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
