i965/fs: Don't overwrite fs_visitor::uniforms and ::param_size during the SIMD16 run.

Image variables need to allocate additional uniform slots over
nir_shader::num_uniforms.  nir_setup_uniforms() overwrites the values
imported from the SIMD8 visitor and then exits early before entering
the nir_shader::uniforms loop, so image uniforms are never re-created.
Instead leave the imported values alone, they *must* be the same for
the uniform layout of both runs to be compatible.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

src/mesa/drivers/dri/i965/brw_fs_nir.cpp

@@ -182,9 +182,11 @@ fs_visitor::nir_setup_outputs(nir_shader *shader)
 void
 fs_visitor::nir_setup_uniforms(nir_shader *shader)
 {
-   uniforms = shader->num_uniforms;
    num_direct_uniforms = shader->num_direct_uniforms;
 
+   if (dispatch_width != 8)
+      return;
+
    /* We split the uniform register file in half.  The first half is
     * entirely direct uniforms.  The second half is indirect.
     */
@@ -192,8 +194,7 @@ fs_visitor::nir_setup_uniforms(nir_shader *shader)
    if (shader->num_uniforms > num_direct_uniforms)
       param_size[num_direct_uniforms] = shader->num_uniforms - num_direct_uniforms;
 
-   if (dispatch_width != 8)
-      return;
+   uniforms = shader->num_uniforms;
 
    if (shader_prog) {
       foreach_list_typed(nir_variable, var, node, &shader->uniforms) {