gallium: add TGSI property NEXT_SHADER

Radeonsi needs to know which shader stage will execute after a shader
in order to make the best decision about which shader variant to compile
first.

This is only set for VS and TES, because we don't need it elsewhere.

VS has 3 variants:
- next shader is FS
- next shader is GS
- next shader is TCS

TES has 2 variants:
- next shader is FS
- next shader is GS

Currently, radeonsi always assumes the next shader is FS, which is suboptimal,
since st/mesa always knows which shader is next if the GLSL program is not
a "separate shader".

By default, ureg always sets "next shader is FS".

Reviewed-by: Nicolai Hähnle <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index 7a34841088a..5c460276d73 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -278,7 +278,8 @@ union tgsi_immediate_data
 #define TGSI_PROPERTY_NUM_CLIPDIST_ENABLED   15
 #define TGSI_PROPERTY_NUM_CULLDIST_ENABLED   16
 #define TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL 17
-#define TGSI_PROPERTY_COUNT                  18
+#define TGSI_PROPERTY_NEXT_SHADER            18
+#define TGSI_PROPERTY_COUNT                  19
 
 struct tgsi_property {
    unsigned Type         : 4;  /**< TGSI_TOKEN_TYPE_PROPERTY */