[Mesa-dev] [PATCH 10/19] glsl: Don't allow invalid identifiers as interface block instance names.

[Paul Berry]

Note: we need to make an exception for the gl_PerVertex interface
block, since in geometry shaders it is allowed to be redeclared with
the instance name gl_in.  Future patches will make redeclaration of
gl_PerVertex work properly.

Fixes piglit test
spec/glsl-1.50/compiler/interface-block-instance-name-uses-gl-prefix.vert.
---
 src/glsl/ast_to_hir.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index aabf201..bb14fc9 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -4692,6 +4692,9 @@ ast_interface_block::hir(exec_list *instructions,
     *     field selector ( . ) operator (analogously to structures)."
     */
    if (this->instance_name) {
+      if (!redeclaring_per_vertex)
+         check_valid_identifier(this->instance_name, loc, state);
+
       ir_variable *var;
 
       if (this->is_array) {
-- 
1.8.4