[Mesa-dev] Geometry shader support for nv50

[Bryan Cain]

The following patch set makes the necessary changes to support geometry shaders
in the nv50 driver.  There are no piglit tests yet for geometry shader corner
cases yet, so these changes were tested with all of the GS demos in mesa/demos
and several corner case tests, using Paul Berry's "gs" branch with support for
GL_ARB_geometry_shader4.   I have also confirmed that the set does not regress
any of the piglit tests in tests/shaders.

Although this set updates the nvc0 driver to handle the indirect addressing
changes in nv50_ir_from_tgsi, it hasn't been tested yet since I don't have
the hardware.