radv: enable nir component packing

SaschaWillems Vulkan demo tessellation:

~4000fps -> ~4600fps

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/vulkan/radv_pipeline.c b/src/amd/vulkan/radv_pipeline.c
index fcbb5804f5e9df5a16b7153e2f4b65371755ee79..6490b04863070f8005911513468be77d4b7095fb 100644 (file)
--- a/src/amd/vulkan/radv_pipeline.c
+++ b/src/amd/vulkan/radv_pipeline.c
@@ -1828,6 +1828,7 @@ void radv_create_shaders(struct radv_pipeline *pipeline,
                last = i;
        }
 
+       int prev = -1;
        for (unsigned i = 0; i < MESA_SHADER_STAGES; ++i) {
                const VkPipelineShaderStageCreateInfo *stage = pStages[i];
 
@@ -1858,6 +1859,11 @@ void radv_create_shaders(struct radv_pipeline *pipeline,
                        nir_lower_io_to_scalar_early(nir[i], mask);
                        radv_optimize_nir(nir[i]);
                }
+
+               if (prev != -1) {
+                       nir_compact_varyings(nir[prev], nir[i], true);
+               }
+               prev = i;
        }
 
        if (nir[MESA_SHADER_TESS_CTRL]) {