2 * Copyright © 2018 Valve 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
27 opt_shrink_load(nir_intrinsic_instr
*instr
)
29 bool progress
= false;
31 if (instr
->intrinsic
== nir_intrinsic_load_push_constant
) {
32 unsigned mask
= nir_ssa_def_components_read(&instr
->dest
.ssa
);
34 if (instr
->num_components
> util_last_bit(mask
)) {
35 instr
->num_components
= util_last_bit(mask
);
36 instr
->dest
.ssa
.num_components
= instr
->num_components
;
45 nir_opt_shrink_load(nir_shader
*shader
)
47 bool progress
= false;
49 nir_foreach_function(function
, shader
) {
53 nir_foreach_block(block
, function
->impl
) {
54 nir_foreach_instr(instr
, block
) {
55 if (instr
->type
!= nir_instr_type_intrinsic
)
58 progress
|= opt_shrink_load(nir_instr_as_intrinsic(instr
));
62 nir_metadata_preserve(function
->impl
, nir_metadata_block_index
|
63 nir_metadata_dominance
);