1 /*
2 * Copyright (c) 2020 Intel Corporation
3 * Copyright (c) 2020 Collabora Ltd
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 /*
26 * Lower scoped barriers embedding a control barrier (execusion_scope != NONE)
27 * to scoped_barriers-without-control-barrier + control_barrier.
28 */
29
30 #include "brw_nir.h"
31 #include "compiler/nir/nir_builder.h"
32
33 static bool
lower_instr(nir_builder * b,nir_instr * instr,UNUSED void * cb_data)34 lower_instr(nir_builder *b, nir_instr *instr, UNUSED void *cb_data)
35 {
36 if (instr->type != nir_instr_type_intrinsic)
37 return false;
38
39 nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
40
41 if (intr->intrinsic != nir_intrinsic_scoped_barrier ||
42 nir_intrinsic_execution_scope(intr) == NIR_SCOPE_NONE)
43 return false;
44
45 if (nir_intrinsic_execution_scope(intr) == NIR_SCOPE_WORKGROUP) {
46 b->cursor = nir_after_instr(&intr->instr);
47 nir_control_barrier(b);
48 }
49
50 nir_intrinsic_set_execution_scope(intr, NIR_SCOPE_NONE);
51 return true;
52 }
53
54 bool
brw_nir_lower_scoped_barriers(nir_shader * nir)55 brw_nir_lower_scoped_barriers(nir_shader *nir)
56 {
57 return nir_shader_instructions_pass(nir, lower_instr,
58 nir_metadata_block_index |
59 nir_metadata_dominance,
60 NULL);
61 }
62