glsl: Drop exec_list argument to lower_ubo_reference

We always pass in shader->ir and we already pass in the shader, so just
drop the exec_list. Most passes either take just a exec_list or a
shader, so this seems more consistent.

Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Kristian Høgsberg Kristensen <krh@bitplanet.net>

src/glsl/ir_optimization.h

@@ -124,7 +124,7 @@ bool lower_const_arrays_to_uniforms(exec_list *instructions);
 bool lower_clip_distance(gl_shader *shader);
 void lower_output_reads(unsigned stage, exec_list *instructions);
 bool lower_packing_builtins(exec_list *instructions, int op_mask);
-void lower_ubo_reference(struct gl_shader *shader, exec_list *instructions);
+void lower_ubo_reference(struct gl_shader *shader);
 void lower_packed_varyings(void *mem_ctx,
                            unsigned locations_used, ir_variable_mode mode,
                            unsigned gs_input_vertices, gl_shader *shader);

src/glsl/lower_ubo_reference.cpp

@@ -1270,7 +1270,7 @@ lower_ubo_reference_visitor::visit_enter(ir_call *ir)
 } /* unnamed namespace */
 
 void
-lower_ubo_reference(struct gl_shader *shader, exec_list *instructions)
+lower_ubo_reference(struct gl_shader *shader)
 {
    lower_ubo_reference_visitor v(shader);
 
@@ -1281,6 +1281,6 @@ lower_ubo_reference(struct gl_shader *shader, exec_list *instructions)
     */
    do {
       v.progress = false;
-      visit_list_elements(&v, instructions);
+      visit_list_elements(&v, shader->ir);
    } while (v.progress);
 }

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

@@ -157,7 +157,7 @@ process_glsl_ir(gl_shader_stage stage,
                  _mesa_shader_stage_to_abbrev(shader->Stage));
    }
 
-   lower_ubo_reference(shader, shader->ir);
+   lower_ubo_reference(shader);
 
    bool progress;
    do {

src/mesa/state_tracker/st_glsl_to_tgsi.cpp

@@ -5822,7 +5822,7 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
                          (!ctx->Const.NativeIntegers ? INT_DIV_TO_MUL_RCP : 0) |
                          (options->EmitNoSat ? SAT_TO_CLAMP : 0));
 
-      lower_ubo_reference(prog->_LinkedShaders[i], ir);
+      lower_ubo_reference(prog->_LinkedShaders[i]);
       do_vec_index_to_cond_assign(ir);
       lower_vector_insert(ir, true);
       lower_quadop_vector(ir, false);