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11 * The above copyright notice and this permission notice (including the next
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25 #include "nir_builder.h"
28 * \file nir_opt_intrinsics.c
32 opt_intrinsics_impl(nir_function_impl
*impl
)
35 nir_builder_init(&b
, impl
);
36 bool progress
= false;
38 nir_foreach_block(block
, impl
) {
39 nir_foreach_instr_safe(instr
, block
) {
40 if (instr
->type
!= nir_instr_type_intrinsic
)
43 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
44 nir_ssa_def
*replacement
= NULL
;
45 b
.cursor
= nir_before_instr(instr
);
47 switch (intrin
->intrinsic
) {
48 case nir_intrinsic_vote_any
:
49 case nir_intrinsic_vote_all
: {
50 nir_const_value
*val
= nir_src_as_const_value(intrin
->src
[0]);
51 if (!val
&& !b
.shader
->options
->lower_vote_trivial
)
54 replacement
= nir_ssa_for_src(&b
, intrin
->src
[0], 1);
57 case nir_intrinsic_vote_eq
: {
58 nir_const_value
*val
= nir_src_as_const_value(intrin
->src
[0]);
59 if (!val
&& !b
.shader
->options
->lower_vote_trivial
)
62 replacement
= nir_imm_int(&b
, NIR_TRUE
);
65 case nir_intrinsic_ballot
: {
66 assert(b
.shader
->options
->max_subgroup_size
!= 0);
67 if (b
.shader
->options
->max_subgroup_size
> 32 ||
68 intrin
->dest
.ssa
.bit_size
<= 32)
71 nir_intrinsic_instr
*ballot
=
72 nir_intrinsic_instr_create(b
.shader
, nir_intrinsic_ballot
);
73 nir_ssa_dest_init(&ballot
->instr
, &ballot
->dest
, 1, 32, NULL
);
74 nir_src_copy(&ballot
->src
[0], &intrin
->src
[0], ballot
);
76 nir_builder_instr_insert(&b
, &ballot
->instr
);
78 replacement
= nir_pack_64_2x32_split(&b
,
83 case nir_intrinsic_load_subgroup_eq_mask
:
84 case nir_intrinsic_load_subgroup_ge_mask
:
85 case nir_intrinsic_load_subgroup_gt_mask
:
86 case nir_intrinsic_load_subgroup_le_mask
:
87 case nir_intrinsic_load_subgroup_lt_mask
: {
88 if (!b
.shader
->options
->lower_subgroup_masks
)
91 nir_ssa_def
*count
= nir_load_subgroup_invocation(&b
);
93 switch (intrin
->intrinsic
) {
94 case nir_intrinsic_load_subgroup_eq_mask
:
95 replacement
= nir_ishl(&b
, nir_imm_int64(&b
, 1ull), count
);
97 case nir_intrinsic_load_subgroup_ge_mask
:
98 replacement
= nir_ishl(&b
, nir_imm_int64(&b
, ~0ull), count
);
100 case nir_intrinsic_load_subgroup_gt_mask
:
101 replacement
= nir_ishl(&b
, nir_imm_int64(&b
, ~1ull), count
);
103 case nir_intrinsic_load_subgroup_le_mask
:
104 replacement
= nir_inot(&b
, nir_ishl(&b
, nir_imm_int64(&b
, ~1ull), count
));
106 case nir_intrinsic_load_subgroup_lt_mask
:
107 replacement
= nir_inot(&b
, nir_ishl(&b
, nir_imm_int64(&b
, ~0ull), count
));
110 unreachable("you seriously can't tell this is unreachable?");
121 nir_ssa_def_rewrite_uses(&intrin
->dest
.ssa
,
122 nir_src_for_ssa(replacement
));
123 nir_instr_remove(instr
);
124 nir_metadata_preserve(impl
, nir_metadata_block_index
|
125 nir_metadata_dominance
);
134 nir_opt_intrinsics(nir_shader
*shader
)
136 bool progress
= false;
138 nir_foreach_function(function
, shader
) {
140 progress
|= opt_intrinsics_impl(function
->impl
);