Mesa (master): anv/pipeline: Do cross-stage linking optimizations

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Module: Mesa
Branch: master
Commit: 7ef6cd0ee87ae89d9809a4ca7dc903d7fac2802e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7ef6cd0ee87ae89d9809a4ca7dc903d7fac2802e

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Fri Oct 27 17:07:52 2017 -0700

anv/pipeline: Do cross-stage linking optimizations

This appears to help the Aztec Ruins benchmark by about 2% on my Kaby
Lake gt2 laptop.

Reviewed-by: Timothy Arceri <tarceri at itsqueeze.com>

---

 src/intel/vulkan/anv_pipeline.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/intel/vulkan/anv_pipeline.c b/src/intel/vulkan/anv_pipeline.c
index 6095c1fb06..85f38da60f 100644
--- a/src/intel/vulkan/anv_pipeline.c
+++ b/src/intel/vulkan/anv_pipeline.c
@@ -559,6 +559,9 @@ anv_pipeline_link_vs(const struct brw_compiler *compiler,
                      struct anv_pipeline_stage *next_stage)
 {
    anv_fill_binding_table(&vs_stage->prog_data.vs.base.base, 0);
+
+   if (next_stage)
+      brw_nir_link_shaders(compiler, &vs_stage->nir, &next_stage->nir);
 }
 
 static const unsigned *
@@ -623,6 +626,8 @@ anv_pipeline_link_tcs(const struct brw_compiler *compiler,
 
    anv_fill_binding_table(&tcs_stage->prog_data.tcs.base.base, 0);
 
+   brw_nir_link_shaders(compiler, &tcs_stage->nir, &tes_stage->nir);
+
    nir_lower_patch_vertices(tes_stage->nir,
                             tcs_stage->nir->info.tess.tcs_vertices_out,
                             NULL);
@@ -671,6 +676,9 @@ anv_pipeline_link_tes(const struct brw_compiler *compiler,
                       struct anv_pipeline_stage *next_stage)
 {
    anv_fill_binding_table(&tes_stage->prog_data.tes.base.base, 0);
+
+   if (next_stage)
+      brw_nir_link_shaders(compiler, &tes_stage->nir, &next_stage->nir);
 }
 
 static const unsigned *
@@ -691,6 +699,9 @@ anv_pipeline_link_gs(const struct brw_compiler *compiler,
                      struct anv_pipeline_stage *next_stage)
 {
    anv_fill_binding_table(&gs_stage->prog_data.gs.base.base, 0);
+
+   if (next_stage)
+      brw_nir_link_shaders(compiler, &gs_stage->nir, &next_stage->nir);
 }
 
 static const unsigned *