glsl: Add ir node for barrier

v2:
 * Changes suggested by mattst88

[[email protected]: Add nir support]
Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Ben Widawsky <[email protected]>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index fab1cd2d291..f9045553501 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -78,6 +78,7 @@ enum ir_node_type {
    ir_type_discard,
    ir_type_emit_vertex,
    ir_type_end_primitive,
+   ir_type_barrier,
    ir_type_max, /**< maximum ir_type enum number, for validation */
    ir_type_unset = ir_type_max
 };
@@ -2396,6 +2397,29 @@ public:
    ir_rvalue *stream;
 };
 
+/**
+ * IR instruction for tessellation control and compute shader barrier.
+ */
+class ir_barrier : public ir_instruction {
+public:
+   ir_barrier()
+      : ir_instruction(ir_type_barrier)
+   {
+   }
+
+   virtual void accept(ir_visitor *v)
+   {
+      v->visit(this);
+   }
+
+   virtual ir_barrier *clone(void *mem_ctx, struct hash_table *) const
+   {
+      return new(mem_ctx) ir_barrier();
+   }
+
+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+};
+
 /*@}*/
 
 /**