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25 * \file ir_array_refcount.h
27 * Provides a visitor which produces a list of variables referenced.
30 #ifndef GLSL_IR_ARRAY_REFCOUNT_H
31 #define GLSL_IR_ARRAY_REFCOUNT_H
34 #include "ir_visitor.h"
35 #include "linker_util.h"
36 #include "compiler/glsl_types.h"
37 #include "util/bitset.h"
39 class ir_array_refcount_entry
42 ir_array_refcount_entry(ir_variable
*var
);
43 ~ir_array_refcount_entry();
45 ir_variable
*var
; /* The key: the variable's pointer. */
47 /** Has the variable been referenced? */
50 /** Count of nested arrays in the type. */
53 /** Set of bit-flags to note which array elements have been accessed. */
56 /** Has a linearized array index been referenced? */
57 bool is_linearized_index_referenced(unsigned linearized_index
) const
60 assert(linearized_index
<= num_bits
);
62 return BITSET_TEST(bits
, linearized_index
);
68 * Total number of bits referenced by \c bits.
70 * Also the total number of array(s-of-arrays) elements of \c var.
74 friend class array_refcount_test
;
77 class ir_array_refcount_visitor
: public ir_hierarchical_visitor
{
79 ir_array_refcount_visitor(void);
80 ~ir_array_refcount_visitor(void);
82 virtual ir_visitor_status
visit(ir_dereference_variable
*);
84 virtual ir_visitor_status
visit_enter(ir_function_signature
*);
85 virtual ir_visitor_status
visit_enter(ir_dereference_array
*);
88 * Find variable in the hash table, and insert it if not present
90 ir_array_refcount_entry
*get_variable_entry(ir_variable
*var
);
93 * Hash table mapping ir_variable to ir_array_refcount_entry.
95 struct hash_table
*ht
;
100 /** Get an array_deref_range element from private tracking. */
101 array_deref_range
*get_array_deref();
104 * Last ir_dereference_array that was visited
106 * Used to prevent some redundant calculations.
108 * \sa ::visit_enter(ir_dereference_array *)
110 ir_dereference_array
*last_array_deref
;
113 * \name array_deref_range tracking
116 /** Currently allocated block of derefs. */
117 array_deref_range
*derefs
;
119 /** Number of derefs used in current processing. */
122 /** Size of the derefs buffer in bytes. */
123 unsigned derefs_size
;
127 #endif /* GLSL_IR_ARRAY_REFCOUNT_H */