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-rw-r--r--src/compiler/glsl/glsl_to_nir.cpp1
-rw-r--r--src/compiler/nir/nir.h10
2 files changed, 11 insertions, 0 deletions
diff --git a/src/compiler/glsl/glsl_to_nir.cpp b/src/compiler/glsl/glsl_to_nir.cpp
index 99df6e0baf5..ce8da1ce438 100644
--- a/src/compiler/glsl/glsl_to_nir.cpp
+++ b/src/compiler/glsl/glsl_to_nir.cpp
@@ -315,6 +315,7 @@ nir_visitor::visit(ir_variable *ir)
var->type = ir->type;
var->name = ralloc_strdup(var, ir->name);
+ var->data.always_active_io = ir->data.always_active_io;
var->data.read_only = ir->data.read_only;
var->data.centroid = ir->data.centroid;
var->data.sample = ir->data.sample;
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 8330e6d7ce7..fab2110f619 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -192,6 +192,16 @@ typedef struct nir_variable {
unsigned invariant:1;
/**
+ * When separate shader programs are enabled, only input/outputs between
+ * the stages of a multi-stage separate program can be safely removed
+ * from the shader interface. Other input/outputs must remains active.
+ *
+ * This is also used to make sure xfb varyings that are unused by the
+ * fragment shader are not removed.
+ */
+ unsigned always_active_io:1;
+
+ /**
* Interpolation mode for shader inputs / outputs
*
* \sa glsl_interp_mode