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25 * \file ir_variable_refcount.h
27 * Provides a visitor which produces a list of variables referenced,
28 * how many times they were referenced and assigned, and whether they
29 * were defined in the scope.
33 #include "ir_visitor.h"
34 #include "glsl_types.h"
36 class ir_variable_refcount_entry : public exec_node
39 ir_variable_refcount_entry(ir_variable *var);
41 ir_variable *var; /* The key: the variable's pointer. */
42 ir_assignment *assign; /* An assignment to the variable, if any */
44 /** Number of times the variable is referenced, including assignments. */
45 unsigned referenced_count;
47 /** Number of times the variable is assigned. */
48 unsigned assigned_count;
50 bool declaration; /* If the variable had a decl in the instruction stream */
53 class ir_variable_refcount_visitor : public ir_hierarchical_visitor {
55 ir_variable_refcount_visitor(void)
57 this->mem_ctx = ralloc_context(NULL);
58 this->variable_list.make_empty();
61 ~ir_variable_refcount_visitor(void)
63 ralloc_free(this->mem_ctx);
66 virtual ir_visitor_status visit(ir_variable *);
67 virtual ir_visitor_status visit(ir_dereference_variable *);
69 virtual ir_visitor_status visit_enter(ir_function_signature *);
70 virtual ir_visitor_status visit_leave(ir_assignment *);
72 ir_variable_refcount_entry *get_variable_entry(ir_variable *var);
74 /* List of ir_variable_refcount_entry */
75 exec_list variable_list;