2 files changed, 22 insertions, 0 deletions
diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp
index bbbab0bca..2c357f310 100644
--- a/src/video_core/shader/shader_ir.cpp
+++ b/src/video_core/shader/shader_ir.cpp
@@ -114,6 +114,18 @@ Node ShaderIR::GetOutputAttribute(Attribute::Index index, u64 element, Node buff
             break;
         }
     }
+    if (index == Attribute::Index::TessCoordInstanceIDVertexID) {
+        switch (element) {
+        case 2:
+            uses_instance_id = true;
+            break;
+        case 3:
+            uses_vertex_id = true;
+            break;
+        default:
+            break;
+        }
+    }
     if (index == Attribute::Index::ClipDistances0123 ||
         index == Attribute::Index::ClipDistances4567) {
         const auto clip_index =
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 6aed9bb84..2f03d83ba 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -124,6 +124,14 @@ public:
         return uses_point_size;
     }
 
+    bool UsesInstanceId() const {
+        return uses_instance_id;
+    }
+
+    bool UsesVertexId() const {
+        return uses_vertex_id;
+    }
+
     bool HasPhysicalAttributes() const {
         return uses_physical_attributes;
     }
@@ -373,6 +381,8 @@ private:
     bool uses_viewport_index{};
     bool uses_point_size{};
     bool uses_physical_attributes{}; // Shader uses AL2P or physical attribute read/writes
+    bool uses_instance_id{};
+    bool uses_vertex_id{};
 
     Tegra::Shader::Header header;
 };