[Mesa-dev] [PATCH 04/17] nir/info: Move the GS info into a stage-specific info union

[Jason Ekstrand]

This way we can have other stage-specific info without consuming too much
extra space.  While we're at it, we make sure that the geometry info is
only set if we're actually a goemetry shader.
---
 src/glsl/nir/glsl_to_nir.cpp | 12 ++++++++++--
 src/glsl/nir/nir.h           | 14 ++++++++------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/glsl/nir/glsl_to_nir.cpp b/src/glsl/nir/glsl_to_nir.cpp
index cdae2d1..da15927 100644
--- a/src/glsl/nir/glsl_to_nir.cpp
+++ b/src/glsl/nir/glsl_to_nir.cpp
@@ -164,11 +164,19 @@ glsl_to_nir(const struct gl_shader_program *shader_prog,
    shader->info.uses_texture_gather = sh->Program->UsesGather;
    shader->info.uses_clip_distance_out = sh->Program->UsesClipDistanceOut;
    shader->info.separate_shader = shader_prog->SeparateShader;
-   shader->info.gs.vertices_out = sh->Geom.VerticesOut;
-   shader->info.gs.invocations = sh->Geom.Invocations;
    shader->info.has_transform_feedback_varyings =
       shader_prog->TransformFeedback.NumVarying > 0;
 
+   switch (stage) {
+   case MESA_SHADER_GEOMETRY:
+      shader->info.gs.vertices_out = sh->Geom.VerticesOut;
+      shader->info.gs.invocations = sh->Geom.Invocations;
+      break;
+
+   default:
+      break; /* No stage-specific info */
+   }
+
    return shader;
 }
 
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index b9f549b..e511298 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1493,13 +1493,15 @@ typedef struct nir_shader_info {
    /** Was this shader linked with any transform feedback varyings? */
    bool has_transform_feedback_varyings;
 
-   struct {
-      /** The maximum number of vertices the geometry shader might write. */
-      unsigned vertices_out;
+   union {
+      struct {
+         /** The maximum number of vertices the geometry shader might write. */
+         unsigned vertices_out;
 
-      /** 1 .. MAX_GEOMETRY_SHADER_INVOCATIONS */
-      unsigned invocations;
-   } gs;
+         /** 1 .. MAX_GEOMETRY_SHADER_INVOCATIONS */
+         unsigned invocations;
+      } gs;
+   };
 } nir_shader_info;
 
 typedef struct nir_shader {
-- 
2.5.0.400.gff86faf