Mesa (master): radv: enable nir component packing

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: aecb9bec87f1b8bf47c86f49c8ac2109ef73041f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=aecb9bec87f1b8bf47c86f49c8ac2109ef73041f

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Wed Oct 18 13:48:41 2017 +1100

radv: enable nir component packing

SaschaWillems Vulkan demo tessellation:

~4000fps -> ~4600fps

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

---

 src/amd/vulkan/radv_pipeline.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/amd/vulkan/radv_pipeline.c b/src/amd/vulkan/radv_pipeline.c
index fcbb5804f5..6490b04863 100644
--- 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]) {