anv/pipeline: Do invariance propagation on SPIR-V shaders

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "12.0" <mesa-stable@lists.freedesktop.org>

src/intel/vulkan/anv_pipeline.c

@@ -165,6 +165,9 @@ anv_shader_compile_to_nir(struct anv_device *device,
       nir_remove_dead_variables(nir, nir_var_system_value);
       nir_validate_shader(nir);
 
+      nir_propagate_invariant(nir);
+      nir_validate_shader(nir);
+
       nir_lower_io_to_temporaries(entry_point->shader, entry_point, true, false);
 
       nir_lower_system_values(nir);