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intel/compiler: Be more conservative about subgroup sizes in GL

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The rules for gl_SubgroupSize in Vulkan require that it be a constant
that can be queried through the API.  However, all GL requires is that
it's a uniform.  Instead of always claiming that the subgroup size in
the shader is 32 in GL like we have to do for Vulkan, claim 8 for
geometry stages, the maximum for fragment shaders, and the actual size
for compute.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
This commit is contained in:
Jason Ekstrand
2019-02-22 10:48:39 -06:00
committed by Jason Ekstrand
parent 1981460af2
commit c84b8eeeac
11 changed files with 55 additions and 13 deletions
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2
src/intel/compiler/brw_shader.cpp
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@@ -1244,7 +1244,7 @@ brw_compile_tes(const struct brw_compiler *compiler,
nir->info.inputs_read = key->inputs_read;
nir->info.patch_inputs_read = key->patch_inputs_read;
brw_nir_apply_key(nir, compiler, &key->base, is_scalar);
brw_nir_apply_key(nir, compiler, &key->base, 8, is_scalar);
brw_nir_lower_tes_inputs(nir, input_vue_map);
brw_nir_lower_vue_outputs(nir);
brw_postprocess_nir(nir, compiler, is_scalar);