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27 
28 #ifndef NIR_VLA_H
29 #define NIR_VLA_H
30 
31 #include "c99_alloca.h"
32 
33 
34 /* Declare a variable length array, with no initialization */
35 #define NIR_VLA(_type, _name, _length) \
36    _type *_name = alloca((_length) * sizeof *_name)
37 
38 
39 /* Declare a variable length array, and initialize it with the given byte.
40  *
41  * _length is evaluated twice, so expressions with side-effects must be
42  * avoided.
43  */
44 #define NIR_VLA_FILL(_type, _name, _length, _byte) \
45    _type *_name = memset(alloca((_length) * sizeof *_name), _byte, (_length) * sizeof *_name)
46 
47 
48 /* Declare a variable length array, and zero it.
49  *
50  * Just like NIR_VLA_FILL, _length is evaluated twice, so expressions with
51  * side-effects must be avoided.
52  */
53 #define NIR_VLA_ZERO(_type, _name, _length) \
54    NIR_VLA_FILL(_type, _name, _length, 0)
55 
56 #endif /* NIR_VLA_H */
57