* Provides a visitor which produces a list of variables referenced.
*/
+#ifndef GLSL_IR_ARRAY_REFCOUNT_H
+#define GLSL_IR_ARRAY_REFCOUNT_H
+
#include "ir.h"
#include "ir_visitor.h"
+#include "linker_util.h"
#include "compiler/glsl_types.h"
+#include "util/bitset.h"
class ir_array_refcount_entry
{
public:
ir_array_refcount_entry(ir_variable *var);
+ ~ir_array_refcount_entry();
ir_variable *var; /* The key: the variable's pointer. */
/** Has the variable been referenced? */
bool is_referenced;
+
+ /** Count of nested arrays in the type. */
+ unsigned array_depth;
+
+ /** Set of bit-flags to note which array elements have been accessed. */
+ BITSET_WORD *bits;
+
+ /** Has a linearized array index been referenced? */
+ bool is_linearized_index_referenced(unsigned linearized_index) const
+ {
+ assert(bits != 0);
+ assert(linearized_index <= num_bits);
+
+ return BITSET_TEST(bits, linearized_index);
+ }
+
+private:
+
+ /**
+ * Total number of bits referenced by \c bits.
+ *
+ * Also the total number of array(s-of-arrays) elements of \c var.
+ */
+ unsigned num_bits;
+
+ friend class array_refcount_test;
};
class ir_array_refcount_visitor : public ir_hierarchical_visitor {
virtual ir_visitor_status visit(ir_dereference_variable *);
virtual ir_visitor_status visit_enter(ir_function_signature *);
+ virtual ir_visitor_status visit_enter(ir_dereference_array *);
/**
* Find variable in the hash table, and insert it if not present
struct hash_table *ht;
void *mem_ctx;
+
+private:
+ /** Get an array_deref_range element from private tracking. */
+ array_deref_range *get_array_deref();
+
+ /**
+ * Last ir_dereference_array that was visited
+ *
+ * Used to prevent some redundant calculations.
+ *
+ * \sa ::visit_enter(ir_dereference_array *)
+ */
+ ir_dereference_array *last_array_deref;
+
+ /**
+ * \name array_deref_range tracking
+ */
+ /*@{*/
+ /** Currently allocated block of derefs. */
+ array_deref_range *derefs;
+
+ /** Number of derefs used in current processing. */
+ unsigned num_derefs;
+
+ /** Size of the derefs buffer in bytes. */
+ unsigned derefs_size;
+ /*@}*/
};
+
+#endif /* GLSL_IR_ARRAY_REFCOUNT_H */