On Tue, 17 Jan 2012 04:57:54 -0800, Kenneth Graunke <kenn...@whitecape.org> 
wrote:
> Now that we no longer generate Mesa IR from GLSL IR, it's impossible to
> use the old vertex shader backend for GLSL programs.  There's simply no
> Mesa IR to codegen from.
> 
> Any attempt to do so would result in immediate GPU hangs, presumably due
> to the driver uploading an empty program with no EOT message.
> 
> Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>

Merge to stable?  Granted, it's a hidden knob, but still, let's get rid
of it.

Reviewed-by: Eric Anholt <e...@anholt.net>

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