https://bugs.freedesktop.org/show_bug.cgi?id=35425
--- Comment #1 from s3734770@mail.zih.tu-dresden.de 2011-04-07 01:12:01 PDT --- The PipeCap for instanced drawing is available, the drivers implement them, TGSI has the construct TGSI_SEMANTIC_INSTANCEID.
The only component that does not support instanced drawing is the GLSL compiler.
So can please any of the GLSL guys implement the gl_InstanceID uniform?