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.*
---
src/intel/vulkan/anv_nir_lower_input_attachments.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/src/intel/vulkan/anv_nir_lower_input_attachments.c
b/src/intel/vulkan/anv_nir_lower_input_attachments.c
index 1d6f727..244e7ff 100644
--- a/src/intel/vulkan/anv_nir_lower_input_attachments.c
+++ b/src/intel/vulkan/anv_nir_lower_input_attachments.c
@@ -100,11 +100,8 @@ try_lower_input_load(nir_function_impl *impl,
nir_intrinsic_instr *load)
if (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS) {
tex->op = nir_texop_txf_ms;
-
- nir_ssa_def *sample_id =
- nir_load_system_value(&b, nir_intrinsic_load_sample_id, 0);
tex->src[2].src_type = nir_tex_src_ms_index;
- tex->src[2].src = nir_src_for_ssa(sample_id);
+ tex->src[2].src = load->src[1];
}
nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
--
2.7.4
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