glsl: pass disable_varying_packing bool to the lowering pass

This will allow us to choose to ignore the disable which will be
useful for more fine grained control over when to enable or disable
packing.

Reviewed-by: Anuj Phogat <[email protected]>
Reviewed-by: Edward O'Callaghan <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

3 files changed, 24 insertions, 15 deletions

diff --git a/src/compiler/glsl/ir_optimization.h b/src/compiler/glsl/ir_optimization.h
index b56413a1500..30c95f4772a 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -124,7 +124,8 @@ void lower_shared_reference(struct gl_shader *shader, unsigned *shared_size);
 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);
+                           unsigned gs_input_vertices, gl_shader *shader,
+                           bool disable_varying_packing);
 bool lower_vector_insert(exec_list *instructions, bool lower_nonconstant_index);
 bool lower_vector_derefs(gl_shader *shader);
 void lower_named_interface_blocks(void *mem_ctx, gl_shader *shader);
diff --git a/src/compiler/glsl/link_varyings.cpp b/src/compiler/glsl/link_varyings.cpp
index 34eb848a9c1..806191bd404 100644
--- a/src/compiler/glsl/link_varyings.cpp
+++ b/src/compiler/glsl/link_varyings.cpp
@@ -1784,15 +1784,15 @@ assign_varying_locations(struct gl_context *ctx,
                                               ir_var_shader_in);
    }
 
-   if (!disable_varying_packing) {
-      if (producer) {
-         lower_packed_varyings(mem_ctx, slots_used, ir_var_shader_out,
-                               0, producer);
-      }
-      if (consumer) {
-         lower_packed_varyings(mem_ctx, slots_used, ir_var_shader_in,
-                               consumer_vertices, consumer);
-      }
+   if (producer) {
+      lower_packed_varyings(mem_ctx, slots_used, ir_var_shader_out,
+                            0, producer, disable_varying_packing);
+   }
+
+   if (consumer) {
+      lower_packed_varyings(mem_ctx, slots_used, ir_var_shader_in,
+                            consumer_vertices, consumer,
+                            disable_varying_packing);
    }
 
    return true;
diff --git a/src/compiler/glsl/lower_packed_varyings.cpp b/src/compiler/glsl/lower_packed_varyings.cpp
index 8d1eb1725d5..d91aa22c2a4 100644
--- a/src/compiler/glsl/lower_packed_varyings.cpp
+++ b/src/compiler/glsl/lower_packed_varyings.cpp
@@ -168,7 +168,8 @@ public:
                                  ir_variable_mode mode,
                                  unsigned gs_input_vertices,
                                  exec_list *out_instructions,
-                                 exec_list *out_variables);
+                                 exec_list *out_variables,
+                                 bool disable_varying_packing);
 
    void run(struct gl_shader *shader);
 
@@ -231,6 +232,8 @@ private:
     * Exec list into which the visitor should insert any new variables.
     */
    exec_list *out_variables;
+
+   bool disable_varying_packing;
 };
 
 } /* anonymous namespace */
@@ -238,7 +241,7 @@ private:
 lower_packed_varyings_visitor::lower_packed_varyings_visitor(
       void *mem_ctx, unsigned locations_used, ir_variable_mode mode,
       unsigned gs_input_vertices, exec_list *out_instructions,
-      exec_list *out_variables)
+      exec_list *out_variables, bool disable_varying_packing)
    : mem_ctx(mem_ctx),
      locations_used(locations_used),
      packed_varyings((ir_variable **)
@@ -247,7 +250,8 @@ lower_packed_varyings_visitor::lower_packed_varyings_visitor(
      mode(mode),
      gs_input_vertices(gs_input_vertices),
      out_instructions(out_instructions),
-     out_variables(out_variables)
+     out_variables(out_variables),
+     disable_varying_packing(disable_varying_packing)
 {
 }
 
@@ -656,6 +660,9 @@ lower_packed_varyings_visitor::needs_lowering(ir_variable *var)
    if (var->data.explicit_location)
       return false;
 
+   if (disable_varying_packing)
+      return false;
+
    const glsl_type *type = var->type->without_array();
    if (type->vector_elements == 4 && !type->is_double())
       return false;
@@ -709,7 +716,7 @@ lower_packed_varyings_gs_splicer::visit_leave(ir_emit_vertex *ev)
 void
 lower_packed_varyings(void *mem_ctx, unsigned locations_used,
                       ir_variable_mode mode, unsigned gs_input_vertices,
-                      gl_shader *shader)
+                      gl_shader *shader, bool disable_varying_packing)
 {
    exec_list *instructions = shader->ir;
    ir_function *main_func = shader->symbols->get_function("main");
@@ -720,7 +727,8 @@ lower_packed_varyings(void *mem_ctx, unsigned locations_used,
    lower_packed_varyings_visitor visitor(mem_ctx, locations_used, mode,
                                          gs_input_vertices,
                                          &new_instructions,
-                                         &new_variables);
+                                         &new_variables,
+                                         disable_varying_packing);
    visitor.run(shader);
    if (mode == ir_var_shader_out) {
       if (shader->Stage == MESA_SHADER_GEOMETRY) {