2 * Copyright (C) 2020 Collabora Ltd.
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * Authors (Collabora):
24 * Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
27 #include "main/mtypes.h"
28 #include "compiler/glsl/glsl_to_nir.h"
29 #include "compiler/nir_types.h"
30 #include "main/imports.h"
31 #include "compiler/nir/nir_builder.h"
33 #include "disassemble.h"
34 #include "bifrost_compile.h"
35 #include "bifrost_nir.h"
37 #include "bi_quirks.h"
40 static bi_block
*emit_cf_list(bi_context
*ctx
, struct exec_list
*list
);
41 static bi_instruction
*bi_emit_branch(bi_context
*ctx
);
42 static void bi_schedule_barrier(bi_context
*ctx
);
45 emit_jump(bi_context
*ctx
, nir_jump_instr
*instr
)
47 bi_instruction
*branch
= bi_emit_branch(ctx
);
49 switch (instr
->type
) {
51 branch
->branch
.target
= ctx
->break_block
;
53 case nir_jump_continue
:
54 branch
->branch
.target
= ctx
->continue_block
;
57 unreachable("Unhandled jump type");
60 pan_block_add_successor(&ctx
->current_block
->base
, &branch
->branch
.target
->base
);
63 /* Gets a bytemask for a complete vecN write */
65 bi_mask_for_channels_32(unsigned i
)
67 return (1 << (4 * i
)) - 1;
71 bi_load(enum bi_class T
, nir_intrinsic_instr
*instr
)
73 bi_instruction load
= {
75 .writemask
= bi_mask_for_channels_32(instr
->num_components
),
76 .src
= { BIR_INDEX_CONSTANT
},
77 .constant
= { .u64
= nir_intrinsic_base(instr
) },
80 const nir_intrinsic_info
*info
= &nir_intrinsic_infos
[instr
->intrinsic
];
83 load
.dest
= bir_dest_index(&instr
->dest
);
85 if (info
->has_dest
&& info
->index_map
[NIR_INTRINSIC_TYPE
] > 0)
86 load
.dest_type
= nir_intrinsic_type(instr
);
88 nir_src
*offset
= nir_get_io_offset_src(instr
);
90 if (nir_src_is_const(*offset
))
91 load
.constant
.u64
+= nir_src_as_uint(*offset
);
93 load
.src
[0] = bir_src_index(offset
);
99 bi_emit_ld_vary(bi_context
*ctx
, nir_intrinsic_instr
*instr
)
101 bi_instruction ins
= bi_load(BI_LOAD_VAR
, instr
);
102 ins
.load_vary
.interp_mode
= BIFROST_INTERP_DEFAULT
; /* TODO */
103 ins
.load_vary
.reuse
= false; /* TODO */
104 ins
.load_vary
.flat
= instr
->intrinsic
!= nir_intrinsic_load_interpolated_input
;
105 ins
.dest_type
= nir_type_float
| nir_dest_bit_size(instr
->dest
);
107 if (nir_src_is_const(*nir_get_io_offset_src(instr
))) {
108 /* Zero it out for direct */
109 ins
.src
[1] = BIR_INDEX_ZERO
;
111 /* R61 contains sample mask stuff, TODO RA XXX */
112 ins
.src
[1] = BIR_INDEX_REGISTER
| 61;
119 bi_emit_frag_out(bi_context
*ctx
, nir_intrinsic_instr
*instr
)
121 if (!ctx
->emitted_atest
) {
122 bi_instruction ins
= {
125 BIR_INDEX_REGISTER
| 60 /* TODO: RA */,
126 bir_src_index(&instr
->src
[0])
134 { 3, 0 } /* swizzle out the alpha */
136 .dest
= BIR_INDEX_REGISTER
| 60 /* TODO: RA */,
137 .dest_type
= nir_type_uint32
,
142 bi_schedule_barrier(ctx
);
143 ctx
->emitted_atest
= true;
146 bi_instruction blend
= {
148 .blend_location
= nir_intrinsic_base(instr
),
150 BIR_INDEX_REGISTER
| 60 /* Can this be arbitrary? */,
151 bir_src_index(&instr
->src
[0])
161 .dest
= BIR_INDEX_REGISTER
| 48 /* Looks like magic */,
162 .dest_type
= nir_type_uint32
,
167 bi_schedule_barrier(ctx
);
171 bi_emit_st_vary(bi_context
*ctx
, nir_intrinsic_instr
*instr
)
173 bi_instruction address
= bi_load(BI_LOAD_VAR_ADDRESS
, instr
);
174 address
.dest
= bi_make_temp(ctx
);
175 address
.dest_type
= nir_type_uint64
;
176 address
.writemask
= (1 << 8) - 1;
178 bi_instruction st
= {
179 .type
= BI_STORE_VAR
,
182 bir_src_index(&instr
->src
[0])
194 bi_emit(ctx
, address
);
199 bi_emit_ld_uniform(bi_context
*ctx
, nir_intrinsic_instr
*instr
)
201 bi_instruction ld
= bi_load(BI_LOAD_UNIFORM
, instr
);
202 ld
.src
[1] = BIR_INDEX_ZERO
; /* TODO: UBO index */
204 /* TODO: Indirect access, since we need to multiply by the element
205 * size. I believe we can get this lowering automatically via
206 * nir_lower_io (as mul instructions) with the proper options, but this
208 assert(ld
.src
[0] & BIR_INDEX_CONSTANT
);
209 ld
.constant
.u64
+= ctx
->sysvals
.sysval_count
;
210 ld
.constant
.u64
*= 16;
216 bi_emit_sysval(bi_context
*ctx
, nir_instr
*instr
,
217 unsigned nr_components
, unsigned offset
)
221 /* Figure out which uniform this is */
222 int sysval
= panfrost_sysval_for_instr(instr
, &nir_dest
);
223 void *val
= _mesa_hash_table_u64_search(ctx
->sysvals
.sysval_to_id
, sysval
);
225 /* Sysvals are prefix uniforms */
226 unsigned uniform
= ((uintptr_t) val
) - 1;
228 /* Emit the read itself -- this is never indirect */
230 bi_instruction load
= {
231 .type
= BI_LOAD_UNIFORM
,
232 .writemask
= (1 << (nr_components
* 4)) - 1,
233 .src
= { BIR_INDEX_CONSTANT
},
234 .constant
= { (uniform
* 16) + offset
},
235 .dest
= bir_dest_index(&nir_dest
),
236 .dest_type
= nir_type_uint32
, /* TODO */
243 emit_intrinsic(bi_context
*ctx
, nir_intrinsic_instr
*instr
)
246 switch (instr
->intrinsic
) {
247 case nir_intrinsic_load_barycentric_pixel
:
250 case nir_intrinsic_load_interpolated_input
:
251 case nir_intrinsic_load_input
:
252 if (ctx
->stage
== MESA_SHADER_FRAGMENT
)
253 bi_emit_ld_vary(ctx
, instr
);
254 else if (ctx
->stage
== MESA_SHADER_VERTEX
)
255 bi_emit(ctx
, bi_load(BI_LOAD_ATTR
, instr
));
257 unreachable("Unsupported shader stage");
261 case nir_intrinsic_store_output
:
262 if (ctx
->stage
== MESA_SHADER_FRAGMENT
)
263 bi_emit_frag_out(ctx
, instr
);
264 else if (ctx
->stage
== MESA_SHADER_VERTEX
)
265 bi_emit_st_vary(ctx
, instr
);
267 unreachable("Unsupported shader stage");
270 case nir_intrinsic_load_uniform
:
271 bi_emit_ld_uniform(ctx
, instr
);
274 case nir_intrinsic_load_ssbo_address
:
275 bi_emit_sysval(ctx
, &instr
->instr
, 1, 0);
278 case nir_intrinsic_get_buffer_size
:
279 bi_emit_sysval(ctx
, &instr
->instr
, 1, 8);
282 case nir_intrinsic_load_viewport_scale
:
283 case nir_intrinsic_load_viewport_offset
:
284 case nir_intrinsic_load_num_work_groups
:
285 case nir_intrinsic_load_sampler_lod_parameters_pan
:
286 bi_emit_sysval(ctx
, &instr
->instr
, 3, 0);
296 emit_load_const(bi_context
*ctx
, nir_load_const_instr
*instr
)
298 /* Make sure we've been lowered */
299 assert(instr
->def
.num_components
== 1);
301 bi_instruction move
= {
303 .dest
= bir_ssa_index(&instr
->def
),
304 .dest_type
= instr
->def
.bit_size
| nir_type_uint
,
305 .writemask
= (1 << (instr
->def
.bit_size
/ 8)) - 1,
310 .u64
= nir_const_value_as_uint(instr
->value
[0], instr
->def
.bit_size
)
318 bi_class_for_nir_alu(nir_op op
)
389 unreachable("Unknown ALU op");
394 bi_cond_for_nir(nir_op op
)
410 unreachable("Invalid compare");
415 emit_alu(bi_context
*ctx
, nir_alu_instr
*instr
)
417 /* Assume it's something we can handle normally */
418 bi_instruction alu
= {
419 .type
= bi_class_for_nir_alu(instr
->op
),
420 .dest
= bir_dest_index(&instr
->dest
.dest
),
421 .dest_type
= nir_op_infos
[instr
->op
].output_type
422 | nir_dest_bit_size(instr
->dest
.dest
),
425 /* TODO: Implement lowering of special functions for older Bifrost */
426 assert((alu
.type
!= BI_SPECIAL
) || !(ctx
->quirks
& BIFROST_NO_FAST_OP
));
428 if (instr
->dest
.dest
.is_ssa
) {
429 /* Construct a writemask */
430 unsigned bits_per_comp
= instr
->dest
.dest
.ssa
.bit_size
;
431 unsigned comps
= instr
->dest
.dest
.ssa
.num_components
;
433 unsigned bits
= bits_per_comp
* comps
;
434 unsigned bytes
= MAX2(bits
/ 8, 1);
435 alu
.writemask
= (1 << bytes
) - 1;
437 unsigned comp_mask
= instr
->dest
.write_mask
;
439 alu
.writemask
= pan_to_bytemask(nir_dest_bit_size(instr
->dest
.dest
),
443 /* We inline constants as we go. This tracks how many constants have
444 * been inlined, since we're limited to 64-bits of constants per
447 unsigned dest_bits
= nir_dest_bit_size(instr
->dest
.dest
);
448 unsigned constants_left
= (64 / dest_bits
);
449 unsigned constant_shift
= 0;
453 unsigned num_inputs
= nir_op_infos
[instr
->op
].num_inputs
;
454 assert(num_inputs
<= ARRAY_SIZE(alu
.src
));
456 for (unsigned i
= 0; i
< num_inputs
; ++i
) {
457 unsigned bits
= nir_src_bit_size(instr
->src
[i
].src
);
458 alu
.src_types
[i
] = nir_op_infos
[instr
->op
].input_types
[i
]
461 /* Try to inline a constant */
462 if (nir_src_is_const(instr
->src
[i
].src
) && constants_left
&& (dest_bits
== bits
)) {
464 (nir_src_as_uint(instr
->src
[i
].src
)) << constant_shift
;
466 alu
.src
[i
] = BIR_INDEX_CONSTANT
| constant_shift
;
468 constant_shift
+= dest_bits
;
472 alu
.src
[i
] = bir_src_index(&instr
->src
[i
].src
);
474 /* We assert scalarization above */
475 alu
.swizzle
[i
][0] = instr
->src
[i
].swizzle
[0];
478 /* Op-specific fixup */
481 alu
.src
[2] = BIR_INDEX_ZERO
; /* FMA */
484 alu
.outmod
= BIFROST_SAT
; /* FMOV */
487 alu
.src_neg
[0] = true; /* FMOV */
490 alu
.src_abs
[0] = true; /* FMOV */
493 alu
.src_neg
[1] = true; /* FADD */
498 alu
.op
.minmax
= BI_MINMAX_MAX
; /* MINMAX */
501 alu
.op
.special
= BI_SPECIAL_FRCP
;
504 alu
.op
.special
= BI_SPECIAL_FRSQ
;
507 alu
.op
.special
= BI_SPECIAL_FSIN
;
510 alu
.op
.special
= BI_SPECIAL_FCOS
;
520 alu
.op
.compare
= bi_cond_for_nir(instr
->op
);
530 emit_instr(bi_context
*ctx
, struct nir_instr
*instr
)
532 switch (instr
->type
) {
533 case nir_instr_type_load_const
:
534 emit_load_const(ctx
, nir_instr_as_load_const(instr
));
537 case nir_instr_type_intrinsic
:
538 emit_intrinsic(ctx
, nir_instr_as_intrinsic(instr
));
541 case nir_instr_type_alu
:
542 emit_alu(ctx
, nir_instr_as_alu(instr
));
546 case nir_instr_type_tex
:
547 emit_tex(ctx
, nir_instr_as_tex(instr
));
551 case nir_instr_type_jump
:
552 emit_jump(ctx
, nir_instr_as_jump(instr
));
555 case nir_instr_type_ssa_undef
:
560 //unreachable("Unhandled instruction type");
568 create_empty_block(bi_context
*ctx
)
570 bi_block
*blk
= rzalloc(ctx
, bi_block
);
572 blk
->base
.predecessors
= _mesa_set_create(blk
,
574 _mesa_key_pointer_equal
);
576 blk
->base
.name
= ctx
->block_name_count
++;
582 bi_schedule_barrier(bi_context
*ctx
)
584 bi_block
*temp
= ctx
->after_block
;
585 ctx
->after_block
= create_empty_block(ctx
);
586 list_addtail(&ctx
->after_block
->base
.link
, &ctx
->blocks
);
587 list_inithead(&ctx
->after_block
->base
.instructions
);
588 pan_block_add_successor(&ctx
->current_block
->base
, &ctx
->after_block
->base
);
589 ctx
->current_block
= ctx
->after_block
;
590 ctx
->after_block
= temp
;
594 emit_block(bi_context
*ctx
, nir_block
*block
)
596 if (ctx
->after_block
) {
597 ctx
->current_block
= ctx
->after_block
;
598 ctx
->after_block
= NULL
;
600 ctx
->current_block
= create_empty_block(ctx
);
603 list_addtail(&ctx
->current_block
->base
.link
, &ctx
->blocks
);
604 list_inithead(&ctx
->current_block
->base
.instructions
);
606 nir_foreach_instr(instr
, block
) {
607 emit_instr(ctx
, instr
);
608 ++ctx
->instruction_count
;
611 return ctx
->current_block
;
614 /* Emits an unconditional branch to the end of the current block, returning a
615 * pointer so the user can fill in details */
617 static bi_instruction
*
618 bi_emit_branch(bi_context
*ctx
)
620 bi_instruction branch
= {
623 .cond
= BI_COND_ALWAYS
627 return bi_emit(ctx
, branch
);
630 /* Sets a condition for a branch by examing the NIR condition. If we're
631 * familiar with the condition, we unwrap it to fold it into the branch
632 * instruction. Otherwise, we consume the condition directly. We
633 * generally use 1-bit booleans which allows us to use small types for
638 bi_set_branch_cond(bi_instruction
*branch
, nir_src
*cond
, bool invert
)
640 /* TODO: Try to unwrap instead of always bailing */
641 branch
->src
[0] = bir_src_index(cond
);
642 branch
->src
[1] = BIR_INDEX_ZERO
;
643 branch
->src_types
[0] = branch
->src_types
[1] = nir_type_uint16
;
644 branch
->branch
.cond
= invert
? BI_COND_EQ
: BI_COND_NE
;
648 emit_if(bi_context
*ctx
, nir_if
*nif
)
650 bi_block
*before_block
= ctx
->current_block
;
652 /* Speculatively emit the branch, but we can't fill it in until later */
653 bi_instruction
*then_branch
= bi_emit_branch(ctx
);
654 bi_set_branch_cond(then_branch
, &nif
->condition
, true);
656 /* Emit the two subblocks. */
657 bi_block
*then_block
= emit_cf_list(ctx
, &nif
->then_list
);
658 bi_block
*end_then_block
= ctx
->current_block
;
660 /* Emit a jump from the end of the then block to the end of the else */
661 bi_instruction
*then_exit
= bi_emit_branch(ctx
);
663 /* Emit second block, and check if it's empty */
665 int count_in
= ctx
->instruction_count
;
666 bi_block
*else_block
= emit_cf_list(ctx
, &nif
->else_list
);
667 bi_block
*end_else_block
= ctx
->current_block
;
668 ctx
->after_block
= create_empty_block(ctx
);
670 /* Now that we have the subblocks emitted, fix up the branches */
675 if (ctx
->instruction_count
== count_in
) {
676 /* The else block is empty, so don't emit an exit jump */
677 bi_remove_instruction(then_exit
);
678 then_branch
->branch
.target
= ctx
->after_block
;
680 then_branch
->branch
.target
= else_block
;
681 then_exit
->branch
.target
= ctx
->after_block
;
682 pan_block_add_successor(&end_then_block
->base
, &then_exit
->branch
.target
->base
);
685 /* Wire up the successors */
687 pan_block_add_successor(&before_block
->base
, &then_branch
->branch
.target
->base
); /* then_branch */
689 pan_block_add_successor(&before_block
->base
, &then_block
->base
); /* fallthrough */
690 pan_block_add_successor(&end_else_block
->base
, &ctx
->after_block
->base
); /* fallthrough */
694 emit_loop(bi_context
*ctx
, nir_loop
*nloop
)
696 /* Remember where we are */
697 bi_block
*start_block
= ctx
->current_block
;
699 bi_block
*saved_break
= ctx
->break_block
;
700 bi_block
*saved_continue
= ctx
->continue_block
;
702 ctx
->continue_block
= create_empty_block(ctx
);
703 ctx
->break_block
= create_empty_block(ctx
);
704 ctx
->after_block
= ctx
->continue_block
;
706 /* Emit the body itself */
707 emit_cf_list(ctx
, &nloop
->body
);
709 /* Branch back to loop back */
710 bi_instruction
*br_back
= bi_emit_branch(ctx
);
711 br_back
->branch
.target
= ctx
->continue_block
;
712 pan_block_add_successor(&start_block
->base
, &ctx
->continue_block
->base
);
713 pan_block_add_successor(&ctx
->current_block
->base
, &ctx
->continue_block
->base
);
715 ctx
->after_block
= ctx
->break_block
;
718 ctx
->break_block
= saved_break
;
719 ctx
->continue_block
= saved_continue
;
724 emit_cf_list(bi_context
*ctx
, struct exec_list
*list
)
726 bi_block
*start_block
= NULL
;
728 foreach_list_typed(nir_cf_node
, node
, node
, list
) {
729 switch (node
->type
) {
730 case nir_cf_node_block
: {
731 bi_block
*block
= emit_block(ctx
, nir_cf_node_as_block(node
));
740 emit_if(ctx
, nir_cf_node_as_if(node
));
743 case nir_cf_node_loop
:
744 emit_loop(ctx
, nir_cf_node_as_loop(node
));
748 unreachable("Unknown control flow");
756 glsl_type_size(const struct glsl_type
*type
, bool bindless
)
758 return glsl_count_attribute_slots(type
, false);
762 bi_optimize_nir(nir_shader
*nir
)
765 unsigned lower_flrp
= 16 | 32 | 64;
767 NIR_PASS(progress
, nir
, nir_lower_regs_to_ssa
);
768 NIR_PASS(progress
, nir
, nir_lower_idiv
, nir_lower_idiv_fast
);
770 nir_lower_tex_options lower_tex_options
= {
771 .lower_txs_lod
= true,
773 .lower_tex_without_implicit_lod
= true,
777 NIR_PASS(progress
, nir
, nir_lower_tex
, &lower_tex_options
);
778 NIR_PASS(progress
, nir
, nir_lower_alu_to_scalar
, NULL
, NULL
);
779 NIR_PASS(progress
, nir
, nir_lower_load_const_to_scalar
);
784 NIR_PASS(progress
, nir
, nir_lower_var_copies
);
785 NIR_PASS(progress
, nir
, nir_lower_vars_to_ssa
);
787 NIR_PASS(progress
, nir
, nir_copy_prop
);
788 NIR_PASS(progress
, nir
, nir_opt_remove_phis
);
789 NIR_PASS(progress
, nir
, nir_opt_dce
);
790 NIR_PASS(progress
, nir
, nir_opt_dead_cf
);
791 NIR_PASS(progress
, nir
, nir_opt_cse
);
792 NIR_PASS(progress
, nir
, nir_opt_peephole_select
, 64, false, true);
793 NIR_PASS(progress
, nir
, nir_opt_algebraic
);
794 NIR_PASS(progress
, nir
, nir_opt_constant_folding
);
796 if (lower_flrp
!= 0) {
797 bool lower_flrp_progress
= false;
798 NIR_PASS(lower_flrp_progress
,
802 false /* always_precise */,
803 nir
->options
->lower_ffma
);
804 if (lower_flrp_progress
) {
805 NIR_PASS(progress
, nir
,
806 nir_opt_constant_folding
);
810 /* Nothing should rematerialize any flrps, so we only
811 * need to do this lowering once.
816 NIR_PASS(progress
, nir
, nir_opt_undef
);
817 NIR_PASS(progress
, nir
, nir_opt_loop_unroll
,
820 nir_var_function_temp
);
823 NIR_PASS(progress
, nir
, nir_opt_algebraic_late
);
824 NIR_PASS(progress
, nir
, bifrost_nir_lower_algebraic_late
);
825 NIR_PASS(progress
, nir
, nir_lower_alu_to_scalar
, NULL
, NULL
);
826 NIR_PASS(progress
, nir
, nir_lower_load_const_to_scalar
);
828 /* Take us out of SSA */
829 NIR_PASS(progress
, nir
, nir_lower_locals_to_regs
);
830 NIR_PASS(progress
, nir
, nir_convert_from_ssa
, true);
832 /* We're a primary scalar architecture but there's enough vector that
833 * we use a vector IR so let's not also deal with scalar hacks on top
834 * of the vector hacks */
836 NIR_PASS(progress
, nir
, nir_move_vec_src_uses_to_dest
);
837 NIR_PASS(progress
, nir
, nir_lower_vec_to_movs
);
838 NIR_PASS(progress
, nir
, nir_opt_dce
);
842 bi_insert_mov32(bi_context
*ctx
, bi_instruction
*parent
, unsigned comp
)
844 bi_instruction move
= {
846 .dest
= parent
->dest
,
847 .dest_type
= nir_type_uint32
,
848 .writemask
= (0xF << (4 * comp
)),
849 .src
= { parent
->src
[0] },
850 .src_types
= { nir_type_uint32
},
851 .swizzle
= { { comp
} }
854 bi_emit_before(ctx
, parent
, move
);
858 bi_lower_mov(bi_context
*ctx
, bi_block
*block
)
860 bi_foreach_instr_in_block_safe(block
, ins
) {
861 if (ins
->type
!= BI_MOV
) continue;
862 if (util_bitcount(ins
->writemask
) <= 4) continue;
864 for (unsigned i
= 0; i
< 4; ++i
) {
865 unsigned quad
= (ins
->writemask
>> (4 * i
)) & 0xF;
869 else if (quad
== 0xF)
870 bi_insert_mov32(ctx
, ins
, i
);
872 unreachable("TODO: Lowering <32bit moves");
875 bi_remove_instruction(ins
);
880 bifrost_compile_shader_nir(nir_shader
*nir
, panfrost_program
*program
, unsigned product_id
)
882 bi_context
*ctx
= rzalloc(NULL
, bi_context
);
884 ctx
->stage
= nir
->info
.stage
;
885 ctx
->quirks
= bifrost_get_quirks(product_id
);
886 list_inithead(&ctx
->blocks
);
888 /* Lower gl_Position pre-optimisation, but after lowering vars to ssa
889 * (so we don't accidentally duplicate the epilogue since mesa/st has
890 * messed with our I/O quite a bit already) */
892 NIR_PASS_V(nir
, nir_lower_vars_to_ssa
);
894 if (ctx
->stage
== MESA_SHADER_VERTEX
) {
895 NIR_PASS_V(nir
, nir_lower_viewport_transform
);
896 NIR_PASS_V(nir
, nir_lower_point_size
, 1.0, 1024.0);
899 NIR_PASS_V(nir
, nir_split_var_copies
);
900 NIR_PASS_V(nir
, nir_lower_global_vars_to_local
);
901 NIR_PASS_V(nir
, nir_lower_var_copies
);
902 NIR_PASS_V(nir
, nir_lower_vars_to_ssa
);
903 NIR_PASS_V(nir
, nir_lower_io
, nir_var_all
, glsl_type_size
, 0);
904 NIR_PASS_V(nir
, nir_lower_ssbo
);
906 bi_optimize_nir(nir
);
907 nir_print_shader(nir
, stdout
);
909 panfrost_nir_assign_sysvals(&ctx
->sysvals
, nir
);
910 program
->sysval_count
= ctx
->sysvals
.sysval_count
;
911 memcpy(program
->sysvals
, ctx
->sysvals
.sysvals
, sizeof(ctx
->sysvals
.sysvals
[0]) * ctx
->sysvals
.sysval_count
);
913 nir_foreach_function(func
, nir
) {
917 ctx
->impl
= func
->impl
;
918 emit_cf_list(ctx
, &func
->impl
->body
);
919 break; /* TODO: Multi-function shaders */
922 bi_foreach_block(ctx
, _block
) {
923 bi_block
*block
= (bi_block
*) _block
;
924 bi_lower_mov(ctx
, block
);
927 bool progress
= false;
932 bi_foreach_block(ctx
, _block
) {
933 bi_block
*block
= (bi_block
*) _block
;
934 progress
|= bi_opt_dead_code_eliminate(ctx
, block
);
938 bi_print_shader(ctx
, stdout
);
940 bi_register_allocate(ctx
);
941 bi_print_shader(ctx
, stdout
);
942 bi_pack(ctx
, &program
->compiled
);
943 disassemble_bifrost(stdout
, program
->compiled
.data
, program
->compiled
.size
, true);