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-rw-r--r--src/mesa/program/register_allocate.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mesa/program/register_allocate.c b/src/mesa/program/register_allocate.c
index f08c9d28d6b..07eb154954d 100644
--- a/src/mesa/program/register_allocate.c
+++ b/src/mesa/program/register_allocate.c
@@ -490,6 +490,8 @@ ra_get_node_reg(struct ra_graph *g, unsigned int n)
* input data). These nodes do not end up in the stack during
* ra_simplify(), and thus at ra_select() time it is as if they were
* the first popped off the stack and assigned their fixed locations.
+ * Nodes that use this function do not need to be assigned a register
+ * class.
*
* Must be called before ra_simplify().
*/