1 /*
2 * Copyright © 2019 Red Hat
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 */
24
25 /* Pass to find libclc functions from a clc library shader and inline
26 * them into a user shader.
27 * This pass should only be called once, but it also has to iterate
28 * itself to make sure all instances are lowered, before validation.
29 */
30 #include "nir.h"
31 #include "nir_builder.h"
32 #include "nir_spirv.h"
33
34 static bool
lower_clc_call_instr(nir_instr * instr,nir_builder * b,const nir_shader * clc_shader,struct hash_table * copy_vars)35 lower_clc_call_instr(nir_instr *instr, nir_builder *b,
36 const nir_shader *clc_shader,
37 struct hash_table *copy_vars)
38 {
39 nir_call_instr *call = nir_instr_as_call(instr);
40 nir_function *func = NULL;
41
42 if (!call->callee->name)
43 return false;
44
45 nir_foreach_function(function, clc_shader) {
46 if (strcmp(function->name, call->callee->name) == 0) {
47 func = function;
48 break;
49 }
50 }
51 if (!func || !func->impl) {
52 return false;
53 }
54
55 nir_ssa_def **params = rzalloc_array(b->shader, nir_ssa_def*, call->num_params);
56
57 for (unsigned i = 0; i < call->num_params; i++) {
58 params[i] = nir_ssa_for_src(b, call->params[i],
59 call->callee->params[i].num_components);
60 }
61
62 b->cursor = nir_instr_remove(&call->instr);
63 nir_inline_function_impl(b, func->impl, params, copy_vars);
64
65 ralloc_free(params);
66
67 return true;
68 }
69
70 static bool
nir_lower_libclc_impl(nir_function_impl * impl,const nir_shader * clc_shader,struct hash_table * copy_vars)71 nir_lower_libclc_impl(nir_function_impl *impl,
72 const nir_shader *clc_shader,
73 struct hash_table *copy_vars)
74 {
75 nir_builder b;
76 nir_builder_init(&b, impl);
77
78 bool progress = false;
79 nir_foreach_block_safe(block, impl) {
80 nir_foreach_instr_safe(instr, block) {
81 if (instr->type == nir_instr_type_call)
82 progress |= lower_clc_call_instr(instr, &b, clc_shader, copy_vars);
83 }
84 }
85
86 if (progress) {
87 nir_index_ssa_defs(impl);
88 nir_index_local_regs(impl);
89 nir_metadata_preserve(impl, nir_metadata_none);
90 } else {
91 nir_metadata_preserve(impl, nir_metadata_all);
92 }
93
94 return progress;
95 }
96
97 bool
nir_lower_libclc(nir_shader * shader,const nir_shader * clc_shader)98 nir_lower_libclc(nir_shader *shader,
99 const nir_shader *clc_shader)
100 {
101 void *ra_ctx = ralloc_context(NULL);
102 struct hash_table *copy_vars = _mesa_pointer_hash_table_create(ra_ctx);
103 bool progress = false, overall_progress = false;
104
105 /* do progress passes inside the pass */
106 do {
107 progress = false;
108 nir_foreach_function(function, shader) {
109 if (function->impl)
110 progress |= nir_lower_libclc_impl(function->impl, clc_shader, copy_vars);
111 }
112 overall_progress |= progress;
113 } while (progress);
114
115 ralloc_free(ra_ctx);
116
117 return overall_progress;
118 }
119