radeonsi: Don't export unused clip distance vectors from vertex shader

E.g. the Source engine seems to always write to gl_ClipVertex, but normally
doesn't enable any GL_CLIP_DISTANCEn states. This change removes some
irrelevant parts from the generated vertex shader code in such cases.

Reviewed-by: Tom Stellard <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.h b/src/gallium/drivers/radeonsi/radeonsi_shader.h
index f28a0ea5443..2d4468a2f37 100644
--- a/src/gallium/drivers/radeonsi/radeonsi_shader.h
+++ b/src/gallium/drivers/radeonsi/radeonsi_shader.h
@@ -128,6 +128,7 @@ union si_shader_key {
 	} ps;
 	struct {
 		unsigned	instance_divisors[PIPE_MAX_ATTRIBS];
+		unsigned	ucps_enabled:2;
 	} vs;
 };