anv/pipeline: Lower more constant initializers earlier

Once we've gotten rid of everything but the main entrypoint, there's no
reason why we should go ahead and lower them all.  This is what radv
does and it will make future work easier.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

diff --git a/src/intel/vulkan/anv_pipeline.c b/src/intel/vulkan/anv_pipeline.c
index 4ca1e0be34ede59383750c9e2a90d912ec3dec1b..e64602d28444313d3ab5a82e61e17056991dc790 100644 (file)
--- a/src/intel/vulkan/anv_pipeline.c
+++ b/src/intel/vulkan/anv_pipeline.c
@@ -186,10 +186,12 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
    assert(exec_list_length(&nir->functions) == 1);
    entry_point->name = ralloc_strdup(entry_point, "main");
 
-   /* Make sure we lower constant initializers on output variables so that
-    * nir_remove_dead_variables below sees the corresponding stores
+   /* Now that we've deleted all but the main function, we can go ahead and
+    * lower the rest of the constant initializers.  We do this here so that
+    * nir_remove_dead_variables and split_per_member_structs below see the
+    * corresponding stores.
     */
-   NIR_PASS_V(nir, nir_lower_constant_initializers, nir_var_shader_out);
+   NIR_PASS_V(nir, nir_lower_constant_initializers, ~0);
 
    NIR_PASS_V(nir, nir_remove_dead_variables,
               nir_var_shader_in | nir_var_shader_out | nir_var_system_value);
@@ -197,10 +199,6 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
    if (stage == MESA_SHADER_FRAGMENT)
       NIR_PASS_V(nir, nir_lower_wpos_center, pipeline->sample_shading_enable);
 
-   /* Now that we've deleted all but the main function, we can go ahead and
-    * lower the rest of the constant initializers.
-    */
-   NIR_PASS_V(nir, nir_lower_constant_initializers, ~0);
    NIR_PASS_V(nir, nir_propagate_invariant);
    NIR_PASS_V(nir, nir_lower_io_to_temporaries,
               entry_point->impl, true, false);