glsl: Add is_rvalue, is_dereference, and is_jump methods

These functions deteremine when an IR node is one of the non-leaf
classes.

v2: Adjust indentation to line up.  Suggested by Matt.

Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Francisco Jerez <[email protected]>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index fdc22edf133..b3a98b88a1e 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -109,6 +109,31 @@ public:
    virtual ir_instruction *clone(void *mem_ctx,
 				 struct hash_table *ht) const = 0;
 
+   bool is_rvalue() const
+   {
+      return ir_type == ir_type_dereference_array ||
+             ir_type == ir_type_dereference_record ||
+             ir_type == ir_type_dereference_variable ||
+             ir_type == ir_type_constant ||
+             ir_type == ir_type_expression ||
+             ir_type == ir_type_swizzle ||
+             ir_type == ir_type_texture;
+   }
+
+   bool is_dereference() const
+   {
+      return ir_type == ir_type_dereference_array ||
+             ir_type == ir_type_dereference_record ||
+             ir_type == ir_type_dereference_variable;
+   }
+
+   bool is_jump() const
+   {
+      return ir_type == ir_type_loop_jump ||
+             ir_type == ir_type_return ||
+             ir_type == ir_type_discard;
+   }
+
    /**
     * \name IR instruction downcast functions
     *