2 * Copyright © 2018 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 #include "nir_builder.h"
35 /** Short path so we can keep it on the stack most of the time. */
36 nir_deref_instr
*_short_path
[7];
38 /** A null-terminated array view of a deref chain
40 * The first element of this array will be the variable dereference
41 * followed by every deref_instr on the path to the final one. The last
42 * element in the array is a NULL pointer which acts as a terminator.
44 nir_deref_instr
**path
;
47 void nir_deref_path_init(nir_deref_path
*path
,
48 nir_deref_instr
*deref
, void *mem_ctx
);
49 void nir_deref_path_finish(nir_deref_path
*path
);
51 unsigned nir_deref_instr_get_const_offset(nir_deref_instr
*deref
,
52 glsl_type_size_align_func size_align
);
54 nir_ssa_def
*nir_build_deref_offset(nir_builder
*b
, nir_deref_instr
*deref
,
55 glsl_type_size_align_func size_align
);
58 nir_derefs_do_not_alias
= 0,
59 nir_derefs_equal_bit
= (1 << 0),
60 nir_derefs_may_alias_bit
= (1 << 1),
61 nir_derefs_a_contains_b_bit
= (1 << 2),
62 nir_derefs_b_contains_a_bit
= (1 << 3),
63 } nir_deref_compare_result
;
65 nir_deref_compare_result
nir_compare_deref_paths(nir_deref_path
*a_path
, nir_deref_path
*b_path
);
66 nir_deref_compare_result
nir_compare_derefs(nir_deref_instr
*a
, nir_deref_instr
*b
);
72 #endif /* NIR_DEREF_H */