1 /*
2 * Copyright © 2016 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
24 #include "nir_builder.h"
25
26 void
nir_lower_tes_patch_vertices(nir_shader * tes_nir,unsigned patch_vertices)27 nir_lower_tes_patch_vertices(nir_shader *tes_nir, unsigned patch_vertices)
28 {
29 nir_foreach_function(function, tes_nir) {
30 if (function->impl) {
31 nir_foreach_block(block, function->impl) {
32 nir_builder b;
33 nir_builder_init(&b, function->impl);
34 nir_foreach_instr_safe(instr, block) {
35 if (instr->type == nir_instr_type_intrinsic) {
36 nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
37 if (intr->intrinsic != nir_intrinsic_load_patch_vertices_in)
38 continue;
39
40 b.cursor = nir_before_instr(&intr->instr);
41 nir_ssa_def *val = nir_imm_int(&b, patch_vertices);
42 nir_ssa_def_rewrite_uses(&intr->dest.ssa,
43 nir_src_for_ssa(val));
44 nir_instr_remove(instr);
45 }
46 }
47 }
48
49 nir_metadata_preserve(function->impl, nir_metadata_block_index |
50 nir_metadata_dominance);
51 }
52 }
53 }
54