According to GL_KHR_vulkan_glsl, the signature of subpassLoad() is:
gvec4 subpassLoad(gsubpassInput subpass);
gvec4 subpassLoad(gsubpassInputMS subpass, int sample);
So the multisampled case always receives an explicit sample index that we
should use. The current implementation was ignoring this parameter
and using gl_SampleID value instead.
Fixes:
dEQP-VK.pipeline.multisample_shader_builtin.sample_id.*
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: "17.0" <mesa-stable@lists.freedesktop.org>
We rename it to nir_deref_clone, re-order the sources to match the other
clone functions, and expose nir_deref_var_clone. This past part, in
particular, lets us get rid of quite a few lines since we no longer have
to call nir_copy_deref and wrap it in deref_as_var.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
