Mesa (master): nir: Add a nir_shader_info:: has_transform_feedback_varyings flag.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 7768b802e57253e6a91b908e9b855d23f0fd2d3f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7768b802e57253e6a91b908e9b855d23f0fd2d3f

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri Oct  2 15:55:05 2015 -0700

nir: Add a nir_shader_info::has_transform_feedback_varyings flag.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/glsl/nir/glsl_to_nir.cpp |    2 ++
 src/glsl/nir/nir.h           |    3 +++
 2 files changed, 5 insertions(+)

diff --git a/src/glsl/nir/glsl_to_nir.cpp b/src/glsl/nir/glsl_to_nir.cpp
index 4dd6287..efaa73e 100644
--- a/src/glsl/nir/glsl_to_nir.cpp
+++ b/src/glsl/nir/glsl_to_nir.cpp
@@ -164,6 +164,8 @@ glsl_to_nir(const struct gl_shader_program *shader_prog,
    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;
 
    return shader;
 }
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 268fbc2..bde9f49 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1487,6 +1487,9 @@ typedef struct nir_shader_info {
    /* Whether or not separate shader objects were used */
    bool separate_shader;
 
+   /** 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;