[Mesa-dev] [PATCH] glsl: do not raise uninitialized variable warning with gl_GlobalInvocationID/gl_LocalInvocationIndex

[Alejandro Piñeiro]

Most GLSL built-ins variables are filtered out because they have
the mode ir_var_system_value, but those two not. Those two are
specially handled as they can be infered from other system values,
and were represented as a variable initialized with a value
based of those system values, instead of a lowering.
---

As a reference, this would be the patch I'm proposing.

 src/compiler/glsl/ast_to_hir.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp
index a031231..aec8e6f 100644
--- a/src/compiler/glsl/ast_to_hir.cpp
+++ b/src/compiler/glsl/ast_to_hir.cpp
@@ -1905,7 +1905,9 @@ ast_expression::do_hir(exec_list *instructions,
 
          if ((var->data.mode == ir_var_auto || var->data.mode == ir_var_shader_out)
              && !this->is_lhs
-             && result->variable_referenced()->data.assigned != true) {
+             && result->variable_referenced()->data.assigned != true
+             && strcmp(var->name, "gl_GlobalInvocationID") != 0
+             && strcmp(var->name, "gl_LocalInvocationIndex") != 0) {
             _mesa_glsl_warning(&loc, state, "`%s' used uninitialized",
                                this->primary_expression.identifier);
          }
-- 
2.5.0