glsl: teach lower_ubo_reference about samplers inside structures

In a situation like:

(tex vec4 (record_ref (var_ref f)  tex)  (constant vec2 (0.000000 0.000000))  0 1 () )

The sampler needs to be lowered, otherwise this ends up with
"ir_dereference_variable @ 0x229a100 specifies undeclared variable
`ubo_load_temp' @ 0x2290440"

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/compiler/glsl/lower_ubo_reference.cpp b/src/compiler/glsl/lower_ubo_reference.cpp
index 365b8ebc653..71188459cdd 100644
--- a/src/compiler/glsl/lower_ubo_reference.cpp
+++ b/src/compiler/glsl/lower_ubo_reference.cpp
@@ -104,6 +104,7 @@ public:
    ir_call *lower_ssbo_atomic_intrinsic(ir_call *ir);
    ir_call *check_for_ssbo_atomic_intrinsic(ir_call *ir);
    ir_visitor_status visit_enter(ir_call *ir);
+   ir_visitor_status visit_enter(ir_texture *ir);
 
    struct gl_linked_shader *shader;
    bool clamp_block_indices;
@@ -1090,6 +1091,20 @@ lower_ubo_reference_visitor::visit_enter(ir_call *ir)
 }
 
 
+ir_visitor_status
+lower_ubo_reference_visitor::visit_enter(ir_texture *ir)
+{
+   ir_dereference *sampler = ir->sampler;
+
+   if (sampler->ir_type == ir_type_dereference_record) {
+      handle_rvalue((ir_rvalue **)&ir->sampler);
+      return visit_continue_with_parent;
+   }
+
+   return rvalue_visit(ir);
+}
+
+
 } /* unnamed namespace */
 
 void