Mesa (master): glsl: Add some comments to methods of ir_variable_refcount_visitor

[Ian Romanick]

Module: Mesa
Branch: master
Commit: fbc1a4b7d26dced9a02cf41a9313d0d43eb014e3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=fbc1a4b7d26dced9a02cf41a9313d0d43eb014e3

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Mon Nov  7 14:24:39 2016 -0800

glsl: Add some comments to methods of ir_variable_refcount_visitor

It was not obvious from the just the .h file what the hash table
contained.  It was also not obvious that get_variable_entry would create
a new entry in the hash table.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

---

 src/compiler/glsl/ir_variable_refcount.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/compiler/glsl/ir_variable_refcount.h b/src/compiler/glsl/ir_variable_refcount.h
index 08a11c0..0a8eec7 100644
--- a/src/compiler/glsl/ir_variable_refcount.h
+++ b/src/compiler/glsl/ir_variable_refcount.h
@@ -72,8 +72,14 @@ public:
    virtual ir_visitor_status visit_enter(ir_function_signature *);
    virtual ir_visitor_status visit_leave(ir_assignment *);
 
+   /**
+    * Find variable in the hash table, and insert it if not present
+    */
    ir_variable_refcount_entry *get_variable_entry(ir_variable *var);
 
+   /**
+    * Hash table mapping ir_variable to ir_variable_refcount_entry.
+    */
    struct hash_table *ht;
 
    void *mem_ctx;