anv/pipeline: Do less deref instruction lowering

This commit removes most of the deref instruction lowering.  Instead of
lowering early, we only lower textures and images and we only do so
right before any of the anv image lowering passes.

Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/intel/vulkan/anv_pipeline.c

@@ -190,8 +190,6 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
    assert(exec_list_length(&nir->functions) == 1);
    entry_point->name = ralloc_strdup(entry_point, "main");
 
-   NIR_PASS_V(nir, nir_lower_deref_instrs, ~0);
-
    /* 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
@@ -220,6 +218,9 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
 
    nir = brw_preprocess_nir(compiler, nir);
 
+   NIR_PASS_V(nir, nir_lower_deref_instrs,
+              nir_lower_texture_derefs | nir_lower_image_derefs);
+
    if (stage == MESA_SHADER_FRAGMENT)
       NIR_PASS_V(nir, anv_nir_lower_input_attachments);