1 /*
2 * Copyright © 2014 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Jason Ekstrand (jason@jlekstrand.net)
25 */
26
27 #include "nir.h"
28
29 /*
30 * Handles management of the metadata.
31 */
32
33 void
nir_metadata_require(nir_function_impl * impl,nir_metadata required,...)34 nir_metadata_require(nir_function_impl *impl, nir_metadata required, ...)
35 {
36 #define NEEDS_UPDATE(X) ((required & ~impl->valid_metadata) & (X))
37
38 if (NEEDS_UPDATE(nir_metadata_block_index))
39 nir_index_blocks(impl);
40 if (NEEDS_UPDATE(nir_metadata_dominance))
41 nir_calc_dominance_impl(impl);
42 if (NEEDS_UPDATE(nir_metadata_live_ssa_defs))
43 nir_live_ssa_defs_impl(impl);
44 if (NEEDS_UPDATE(nir_metadata_loop_analysis)) {
45 va_list ap;
46 va_start(ap, required);
47 nir_loop_analyze_impl(impl, va_arg(ap, nir_variable_mode));
48 va_end(ap);
49 }
50
51 #undef NEEDS_UPDATE
52
53 impl->valid_metadata |= required;
54 }
55
56 void
nir_metadata_preserve(nir_function_impl * impl,nir_metadata preserved)57 nir_metadata_preserve(nir_function_impl *impl, nir_metadata preserved)
58 {
59 impl->valid_metadata &= preserved;
60 }
61
62 #ifndef NDEBUG
63 /**
64 * Make sure passes properly invalidate metadata (part 1).
65 *
66 * Call this before running a pass to set a bogus metadata flag, which will
67 * only be preserved if the pass forgets to call nir_metadata_preserve().
68 */
69 void
nir_metadata_set_validation_flag(nir_shader * shader)70 nir_metadata_set_validation_flag(nir_shader *shader)
71 {
72 nir_foreach_function(function, shader) {
73 if (function->impl) {
74 function->impl->valid_metadata |= nir_metadata_not_properly_reset;
75 }
76 }
77 }
78
79 /**
80 * Make sure passes properly invalidate metadata (part 2).
81 *
82 * Call this after a pass makes progress to verify that the bogus metadata set by
83 * the earlier function was properly thrown away. Note that passes may not call
84 * nir_metadata_preserve() if they don't actually make any changes at all.
85 */
86 void
nir_metadata_check_validation_flag(nir_shader * shader)87 nir_metadata_check_validation_flag(nir_shader *shader)
88 {
89 nir_foreach_function(function, shader) {
90 if (function->impl) {
91 assert(!(function->impl->valid_metadata &
92 nir_metadata_not_properly_reset));
93 }
94 }
95 }
96 #endif
97