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25 * \file ir_array_refcount.h
27 * Provides a visitor which produces a list of variables referenced.
31 #include "ir_visitor.h"
32 #include "compiler/glsl_types.h"
33 #include "util/bitset.h"
35 class ir_array_refcount_entry
38 ir_array_refcount_entry(ir_variable
*var
);
39 ~ir_array_refcount_entry();
41 ir_variable
*var
; /* The key: the variable's pointer. */
43 /** Has the variable been referenced? */
46 /** Has a linearized array index been referenced? */
47 bool is_linearized_index_referenced(unsigned linearized_index
) const
50 assert(linearized_index
<= num_bits
);
52 return BITSET_TEST(bits
, linearized_index
);
56 /** Set of bit-flags to note which array elements have been accessed. */
60 * Total number of bits referenced by \c bits.
62 * Also the total number of array(s-of-arrays) elements of \c var.
66 friend class array_refcount_test
;
69 class ir_array_refcount_visitor
: public ir_hierarchical_visitor
{
71 ir_array_refcount_visitor(void);
72 ~ir_array_refcount_visitor(void);
74 virtual ir_visitor_status
visit(ir_dereference_variable
*);
76 virtual ir_visitor_status
visit_enter(ir_function_signature
*);
79 * Find variable in the hash table, and insert it if not present
81 ir_array_refcount_entry
*get_variable_entry(ir_variable
*var
);
84 * Hash table mapping ir_variable to ir_array_refcount_entry.
86 struct hash_table
*ht
;