2 * Copyright © 2017 Intel Corporation
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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
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20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #include "nir_builder.h"
28 * \file nir_opt_intrinsics.c
32 opt_intrinsics_impl(nir_function_impl
*impl
,
33 const struct nir_shader_compiler_options
*options
)
36 nir_builder_init(&b
, impl
);
37 bool progress
= false;
39 nir_foreach_block(block
, impl
) {
40 nir_foreach_instr_safe(instr
, block
) {
41 if (instr
->type
!= nir_instr_type_intrinsic
)
44 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
45 nir_ssa_def
*replacement
= NULL
;
46 b
.cursor
= nir_before_instr(instr
);
48 switch (intrin
->intrinsic
) {
49 case nir_intrinsic_vote_any
:
50 case nir_intrinsic_vote_all
:
51 if (nir_src_is_const(intrin
->src
[0]))
52 replacement
= nir_ssa_for_src(&b
, intrin
->src
[0], 1);
54 case nir_intrinsic_vote_feq
:
55 case nir_intrinsic_vote_ieq
:
56 if (nir_src_is_const(intrin
->src
[0]))
57 replacement
= nir_imm_true(&b
);
59 case nir_intrinsic_load_sample_mask_in
:
61 * gl_SampleMaskIn == 0 ---> gl_HelperInvocation
62 * gl_SampleMaskIn != 0 ---> !gl_HelperInvocation
64 if (!options
->optimize_sample_mask_in
)
67 nir_foreach_use_safe(use_src
, &intrin
->dest
.ssa
) {
68 if (use_src
->parent_instr
->type
== nir_instr_type_alu
) {
69 nir_alu_instr
*alu
= nir_instr_as_alu(use_src
->parent_instr
);
71 if (alu
->op
== nir_op_ieq
||
72 alu
->op
== nir_op_ine
) {
73 /* Check for 0 in either operand. */
74 nir_const_value
*const_val
=
75 nir_src_as_const_value(alu
->src
[0].src
);
77 const_val
= nir_src_as_const_value(alu
->src
[1].src
);
78 if (!const_val
|| const_val
->i32
!= 0)
81 nir_ssa_def
*new_expr
= nir_load_helper_invocation(&b
, 1);
83 if (alu
->op
== nir_op_ine
)
84 new_expr
= nir_inot(&b
, new_expr
);
86 nir_ssa_def_rewrite_uses(&alu
->dest
.dest
.ssa
,
87 nir_src_for_ssa(new_expr
));
88 nir_instr_remove(&alu
->instr
);
101 nir_ssa_def_rewrite_uses(&intrin
->dest
.ssa
,
102 nir_src_for_ssa(replacement
));
103 nir_instr_remove(instr
);
112 nir_opt_intrinsics(nir_shader
*shader
)
114 bool progress
= false;
116 nir_foreach_function(function
, shader
) {
120 if (opt_intrinsics_impl(function
->impl
, shader
->options
)) {
122 nir_metadata_preserve(function
->impl
, nir_metadata_block_index
|
123 nir_metadata_dominance
);