2 * Copyright 2016 Advanced Micro Devices, Inc.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 #include "si_shader_internal.h"
27 #include "gallivm/lp_bld_const.h"
28 #include "gallivm/lp_bld_gather.h"
29 #include "gallivm/lp_bld_flow.h"
30 #include "gallivm/lp_bld_init.h"
31 #include "gallivm/lp_bld_intr.h"
32 #include "gallivm/lp_bld_misc.h"
33 #include "gallivm/lp_bld_swizzle.h"
34 #include "tgsi/tgsi_info.h"
35 #include "tgsi/tgsi_parse.h"
36 #include "util/u_math.h"
37 #include "util/u_memory.h"
38 #include "util/u_debug.h"
41 #include <llvm-c/Transforms/IPO.h>
42 #include <llvm-c/Transforms/Scalar.h>
44 /* Data for if/else/endif and bgnloop/endloop control flow structures.
47 /* Loop exit or next part of if/else/endif. */
48 LLVMBasicBlockRef next_block
;
49 LLVMBasicBlockRef loop_entry_block
;
52 enum si_llvm_calling_convention
{
53 RADEON_LLVM_AMDGPU_VS
= 87,
54 RADEON_LLVM_AMDGPU_GS
= 88,
55 RADEON_LLVM_AMDGPU_PS
= 89,
56 RADEON_LLVM_AMDGPU_CS
= 90,
57 RADEON_LLVM_AMDGPU_HS
= 93,
60 void si_llvm_add_attribute(LLVMValueRef F
, const char *name
, int value
)
64 snprintf(str
, sizeof(str
), "%i", value
);
65 LLVMAddTargetDependentFunctionAttr(F
, name
, str
);
68 struct si_llvm_diagnostics
{
69 struct pipe_debug_callback
*debug
;
73 static void si_diagnostic_handler(LLVMDiagnosticInfoRef di
, void *context
)
75 struct si_llvm_diagnostics
*diag
= (struct si_llvm_diagnostics
*)context
;
76 LLVMDiagnosticSeverity severity
= LLVMGetDiagInfoSeverity(di
);
77 char *description
= LLVMGetDiagInfoDescription(di
);
78 const char *severity_str
= NULL
;
82 severity_str
= "error";
85 severity_str
= "warning";
88 severity_str
= "remark";
91 severity_str
= "note";
94 severity_str
= "unknown";
97 pipe_debug_message(diag
->debug
, SHADER_INFO
,
98 "LLVM diagnostic (%s): %s", severity_str
, description
);
100 if (severity
== LLVMDSError
) {
102 fprintf(stderr
,"LLVM triggered Diagnostic Handler: %s\n", description
);
105 LLVMDisposeMessage(description
);
109 * Compile an LLVM module to machine code.
111 * @returns 0 for success, 1 for failure
113 unsigned si_llvm_compile(LLVMModuleRef M
, struct ac_shader_binary
*binary
,
114 LLVMTargetMachineRef tm
,
115 struct pipe_debug_callback
*debug
)
117 struct si_llvm_diagnostics diag
;
119 LLVMContextRef llvm_ctx
;
120 LLVMMemoryBufferRef out_buffer
;
121 unsigned buffer_size
;
122 const char *buffer_data
;
128 /* Setup Diagnostic Handler*/
129 llvm_ctx
= LLVMGetModuleContext(M
);
131 LLVMContextSetDiagnosticHandler(llvm_ctx
, si_diagnostic_handler
, &diag
);
134 mem_err
= LLVMTargetMachineEmitToMemoryBuffer(tm
, M
, LLVMObjectFile
, &err
,
137 /* Process Errors/Warnings */
139 fprintf(stderr
, "%s: %s", __FUNCTION__
, err
);
140 pipe_debug_message(debug
, SHADER_INFO
,
141 "LLVM emit error: %s", err
);
147 /* Extract Shader Code*/
148 buffer_size
= LLVMGetBufferSize(out_buffer
);
149 buffer_data
= LLVMGetBufferStart(out_buffer
);
151 if (!ac_elf_read(buffer_data
, buffer_size
, binary
)) {
152 fprintf(stderr
, "radeonsi: cannot read an ELF shader binary\n");
157 LLVMDisposeMemoryBuffer(out_buffer
);
160 if (diag
.retval
!= 0)
161 pipe_debug_message(debug
, SHADER_INFO
, "LLVM compile failed");
165 LLVMTypeRef
tgsi2llvmtype(struct lp_build_tgsi_context
*bld_base
,
166 enum tgsi_opcode_type type
)
168 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
171 case TGSI_TYPE_UNSIGNED
:
172 case TGSI_TYPE_SIGNED
:
174 case TGSI_TYPE_UNSIGNED64
:
175 case TGSI_TYPE_SIGNED64
:
177 case TGSI_TYPE_DOUBLE
:
179 case TGSI_TYPE_UNTYPED
:
180 case TGSI_TYPE_FLOAT
:
187 LLVMValueRef
bitcast(struct lp_build_tgsi_context
*bld_base
,
188 enum tgsi_opcode_type type
, LLVMValueRef value
)
190 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
191 LLVMTypeRef dst_type
= tgsi2llvmtype(bld_base
, type
);
194 return LLVMBuildBitCast(ctx
->ac
.builder
, value
, dst_type
, "");
200 * Return a value that is equal to the given i32 \p index if it lies in [0,num)
201 * or an undefined value in the same interval otherwise.
203 LLVMValueRef
si_llvm_bound_index(struct si_shader_context
*ctx
,
207 LLVMBuilderRef builder
= ctx
->ac
.builder
;
208 LLVMValueRef c_max
= LLVMConstInt(ctx
->i32
, num
- 1, 0);
211 if (util_is_power_of_two(num
)) {
212 index
= LLVMBuildAnd(builder
, index
, c_max
, "");
214 /* In theory, this MAX pattern should result in code that is
215 * as good as the bit-wise AND above.
217 * In practice, LLVM generates worse code (at the time of
218 * writing), because its value tracking is not strong enough.
220 cc
= LLVMBuildICmp(builder
, LLVMIntULE
, index
, c_max
, "");
221 index
= LLVMBuildSelect(builder
, cc
, index
, c_max
, "");
227 static struct si_llvm_flow
*
228 get_current_flow(struct si_shader_context
*ctx
)
230 if (ctx
->flow_depth
> 0)
231 return &ctx
->flow
[ctx
->flow_depth
- 1];
235 static struct si_llvm_flow
*
236 get_innermost_loop(struct si_shader_context
*ctx
)
238 for (unsigned i
= ctx
->flow_depth
; i
> 0; --i
) {
239 if (ctx
->flow
[i
- 1].loop_entry_block
)
240 return &ctx
->flow
[i
- 1];
245 static struct si_llvm_flow
*
246 push_flow(struct si_shader_context
*ctx
)
248 struct si_llvm_flow
*flow
;
250 if (ctx
->flow_depth
>= ctx
->flow_depth_max
) {
251 unsigned new_max
= MAX2(ctx
->flow_depth
<< 1, RADEON_LLVM_INITIAL_CF_DEPTH
);
252 ctx
->flow
= REALLOC(ctx
->flow
,
253 ctx
->flow_depth_max
* sizeof(*ctx
->flow
),
254 new_max
* sizeof(*ctx
->flow
));
255 ctx
->flow_depth_max
= new_max
;
258 flow
= &ctx
->flow
[ctx
->flow_depth
];
261 flow
->next_block
= NULL
;
262 flow
->loop_entry_block
= NULL
;
266 static LLVMValueRef
emit_swizzle(struct lp_build_tgsi_context
*bld_base
,
273 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
274 LLVMValueRef swizzles
[4];
276 swizzles
[0] = LLVMConstInt(ctx
->i32
, swizzle_x
, 0);
277 swizzles
[1] = LLVMConstInt(ctx
->i32
, swizzle_y
, 0);
278 swizzles
[2] = LLVMConstInt(ctx
->i32
, swizzle_z
, 0);
279 swizzles
[3] = LLVMConstInt(ctx
->i32
, swizzle_w
, 0);
281 return LLVMBuildShuffleVector(ctx
->ac
.builder
,
283 LLVMGetUndef(LLVMTypeOf(value
)),
284 LLVMConstVector(swizzles
, 4), "");
288 * Return the description of the array covering the given temporary register
292 get_temp_array_id(struct lp_build_tgsi_context
*bld_base
,
294 const struct tgsi_ind_register
*reg
)
296 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
297 unsigned num_arrays
= ctx
->bld_base
.info
->array_max
[TGSI_FILE_TEMPORARY
];
300 if (reg
&& reg
->ArrayID
> 0 && reg
->ArrayID
<= num_arrays
)
303 for (i
= 0; i
< num_arrays
; i
++) {
304 const struct tgsi_array_info
*array
= &ctx
->temp_arrays
[i
];
306 if (reg_index
>= array
->range
.First
&& reg_index
<= array
->range
.Last
)
313 static struct tgsi_declaration_range
314 get_array_range(struct lp_build_tgsi_context
*bld_base
,
315 unsigned File
, unsigned reg_index
,
316 const struct tgsi_ind_register
*reg
)
318 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
319 struct tgsi_declaration_range range
;
321 if (File
== TGSI_FILE_TEMPORARY
) {
322 unsigned array_id
= get_temp_array_id(bld_base
, reg_index
, reg
);
324 return ctx
->temp_arrays
[array_id
- 1].range
;
328 range
.Last
= bld_base
->info
->file_max
[File
];
333 * For indirect registers, construct a pointer directly to the requested
334 * element using getelementptr if possible.
336 * Returns NULL if the insertelement/extractelement fallback for array access
340 get_pointer_into_array(struct si_shader_context
*ctx
,
344 const struct tgsi_ind_register
*reg_indirect
)
347 struct tgsi_array_info
*array
;
348 LLVMBuilderRef builder
= ctx
->ac
.builder
;
349 LLVMValueRef idxs
[2];
353 if (file
!= TGSI_FILE_TEMPORARY
)
356 array_id
= get_temp_array_id(&ctx
->bld_base
, reg_index
, reg_indirect
);
360 alloca
= ctx
->temp_array_allocas
[array_id
- 1];
364 array
= &ctx
->temp_arrays
[array_id
- 1];
366 if (!(array
->writemask
& (1 << swizzle
)))
367 return ctx
->undef_alloca
;
369 index
= si_get_indirect_index(ctx
, reg_indirect
, 1,
370 reg_index
- ctx
->temp_arrays
[array_id
- 1].range
.First
);
372 /* Ensure that the index is within a valid range, to guard against
373 * VM faults and overwriting critical data (e.g. spilled resource
376 * TODO It should be possible to avoid the additional instructions
377 * if LLVM is changed so that it guarantuees:
378 * 1. the scratch space descriptor isolates the current wave (this
379 * could even save the scratch offset SGPR at the cost of an
380 * additional SALU instruction)
381 * 2. the memory for allocas must be allocated at the _end_ of the
382 * scratch space (after spilled registers)
384 index
= si_llvm_bound_index(ctx
, index
, array
->range
.Last
- array
->range
.First
+ 1);
386 index
= LLVMBuildMul(
388 LLVMConstInt(ctx
->i32
, util_bitcount(array
->writemask
), 0),
390 index
= LLVMBuildAdd(
392 LLVMConstInt(ctx
->i32
,
393 util_bitcount(array
->writemask
& ((1 << swizzle
) - 1)), 0),
395 idxs
[0] = ctx
->i32_0
;
397 return LLVMBuildGEP(ctx
->ac
.builder
, alloca
, idxs
, 2, "");
401 si_llvm_emit_fetch_64bit(struct lp_build_tgsi_context
*bld_base
,
402 enum tgsi_opcode_type type
,
406 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
409 result
= LLVMGetUndef(LLVMVectorType(ctx
->i32
, 2));
411 result
= LLVMBuildInsertElement(ctx
->ac
.builder
,
413 ac_to_integer(&ctx
->ac
, ptr
),
415 result
= LLVMBuildInsertElement(ctx
->ac
.builder
,
417 ac_to_integer(&ctx
->ac
, ptr2
),
419 return bitcast(bld_base
, type
, result
);
423 emit_array_fetch(struct lp_build_tgsi_context
*bld_base
,
424 unsigned File
, enum tgsi_opcode_type type
,
425 struct tgsi_declaration_range range
,
428 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
429 unsigned i
, size
= range
.Last
- range
.First
+ 1;
430 LLVMTypeRef vec
= LLVMVectorType(tgsi2llvmtype(bld_base
, type
), size
);
431 LLVMValueRef result
= LLVMGetUndef(vec
);
433 struct tgsi_full_src_register tmp_reg
= {};
434 tmp_reg
.Register
.File
= File
;
436 for (i
= 0; i
< size
; ++i
) {
437 tmp_reg
.Register
.Index
= i
+ range
.First
;
438 LLVMValueRef temp
= si_llvm_emit_fetch(bld_base
, &tmp_reg
, type
, swizzle
);
439 result
= LLVMBuildInsertElement(ctx
->ac
.builder
, result
, temp
,
440 LLVMConstInt(ctx
->i32
, i
, 0), "array_vector");
446 load_value_from_array(struct lp_build_tgsi_context
*bld_base
,
448 enum tgsi_opcode_type type
,
451 const struct tgsi_ind_register
*reg_indirect
)
453 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
454 LLVMBuilderRef builder
= ctx
->ac
.builder
;
457 ptr
= get_pointer_into_array(ctx
, file
, swizzle
, reg_index
, reg_indirect
);
459 LLVMValueRef val
= LLVMBuildLoad(builder
, ptr
, "");
460 if (tgsi_type_is_64bit(type
)) {
461 LLVMValueRef ptr_hi
, val_hi
;
462 ptr_hi
= LLVMBuildGEP(builder
, ptr
, &ctx
->i32_1
, 1, "");
463 val_hi
= LLVMBuildLoad(builder
, ptr_hi
, "");
464 val
= si_llvm_emit_fetch_64bit(bld_base
, type
, val
, val_hi
);
469 struct tgsi_declaration_range range
=
470 get_array_range(bld_base
, file
, reg_index
, reg_indirect
);
472 si_get_indirect_index(ctx
, reg_indirect
, 1, reg_index
- range
.First
);
474 emit_array_fetch(bld_base
, file
, type
, range
, swizzle
);
475 return LLVMBuildExtractElement(builder
, array
, index
, "");
480 store_value_to_array(struct lp_build_tgsi_context
*bld_base
,
485 const struct tgsi_ind_register
*reg_indirect
)
487 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
488 LLVMBuilderRef builder
= ctx
->ac
.builder
;
491 ptr
= get_pointer_into_array(ctx
, file
, chan_index
, reg_index
, reg_indirect
);
493 LLVMBuildStore(builder
, value
, ptr
);
496 struct tgsi_declaration_range range
= get_array_range(bld_base
, file
, reg_index
, reg_indirect
);
497 LLVMValueRef index
= si_get_indirect_index(ctx
, reg_indirect
, 1, reg_index
- range
.First
);
499 emit_array_fetch(bld_base
, file
, TGSI_TYPE_FLOAT
, range
, chan_index
);
500 LLVMValueRef temp_ptr
;
502 array
= LLVMBuildInsertElement(builder
, array
, value
, index
, "");
504 size
= range
.Last
- range
.First
+ 1;
505 for (i
= 0; i
< size
; ++i
) {
507 case TGSI_FILE_OUTPUT
:
508 temp_ptr
= ctx
->outputs
[i
+ range
.First
][chan_index
];
511 case TGSI_FILE_TEMPORARY
:
512 if (range
.First
+ i
>= ctx
->temps_count
)
514 temp_ptr
= ctx
->temps
[(i
+ range
.First
) * TGSI_NUM_CHANNELS
+ chan_index
];
520 value
= LLVMBuildExtractElement(builder
, array
,
521 LLVMConstInt(ctx
->i32
, i
, 0), "");
522 LLVMBuildStore(builder
, value
, temp_ptr
);
527 /* If this is true, preload FS inputs at the beginning of shaders. Otherwise,
528 * reload them at each use. This must be true if the shader is using
529 * derivatives and KILL, because KILL can leave the WQM and then a lazy
530 * input load isn't in the WQM anymore.
532 static bool si_preload_fs_inputs(struct si_shader_context
*ctx
)
534 struct si_shader_selector
*sel
= ctx
->shader
->selector
;
536 return sel
->info
.uses_derivatives
&&
541 get_output_ptr(struct lp_build_tgsi_context
*bld_base
, unsigned index
,
544 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
546 assert(index
<= ctx
->bld_base
.info
->file_max
[TGSI_FILE_OUTPUT
]);
547 return ctx
->outputs
[index
][chan
];
550 LLVMValueRef
si_llvm_emit_fetch(struct lp_build_tgsi_context
*bld_base
,
551 const struct tgsi_full_src_register
*reg
,
552 enum tgsi_opcode_type type
,
555 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
556 LLVMBuilderRef builder
= ctx
->ac
.builder
;
557 LLVMValueRef result
= NULL
, ptr
, ptr2
;
560 LLVMValueRef values
[TGSI_NUM_CHANNELS
];
562 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; chan
++) {
563 values
[chan
] = si_llvm_emit_fetch(bld_base
, reg
, type
, chan
);
565 return lp_build_gather_values(&ctx
->gallivm
, values
,
569 if (reg
->Register
.Indirect
) {
570 LLVMValueRef load
= load_value_from_array(bld_base
, reg
->Register
.File
, type
,
571 swizzle
, reg
->Register
.Index
, ®
->Indirect
);
572 return bitcast(bld_base
, type
, load
);
575 switch(reg
->Register
.File
) {
576 case TGSI_FILE_IMMEDIATE
: {
577 LLVMTypeRef ctype
= tgsi2llvmtype(bld_base
, type
);
578 if (tgsi_type_is_64bit(type
)) {
579 result
= LLVMGetUndef(LLVMVectorType(ctx
->i32
, 2));
580 result
= LLVMConstInsertElement(result
,
581 ctx
->imms
[reg
->Register
.Index
* TGSI_NUM_CHANNELS
+ swizzle
],
583 result
= LLVMConstInsertElement(result
,
584 ctx
->imms
[reg
->Register
.Index
* TGSI_NUM_CHANNELS
+ swizzle
+ 1],
586 return LLVMConstBitCast(result
, ctype
);
588 return LLVMConstBitCast(ctx
->imms
[reg
->Register
.Index
* TGSI_NUM_CHANNELS
+ swizzle
], ctype
);
592 case TGSI_FILE_INPUT
: {
593 unsigned index
= reg
->Register
.Index
;
594 LLVMValueRef input
[4];
596 /* I don't think doing this for vertex shaders is beneficial.
597 * For those, we want to make sure the VMEM loads are executed
598 * only once. Fragment shaders don't care much, because
599 * v_interp instructions are much cheaper than VMEM loads.
601 if (!si_preload_fs_inputs(ctx
) &&
602 ctx
->bld_base
.info
->processor
== PIPE_SHADER_FRAGMENT
)
603 ctx
->load_input(ctx
, index
, &ctx
->input_decls
[index
], input
);
605 memcpy(input
, &ctx
->inputs
[index
* 4], sizeof(input
));
607 result
= input
[swizzle
];
609 if (tgsi_type_is_64bit(type
)) {
611 ptr2
= input
[swizzle
+ 1];
612 return si_llvm_emit_fetch_64bit(bld_base
, type
, ptr
, ptr2
);
617 case TGSI_FILE_TEMPORARY
:
618 if (reg
->Register
.Index
>= ctx
->temps_count
)
619 return LLVMGetUndef(tgsi2llvmtype(bld_base
, type
));
620 ptr
= ctx
->temps
[reg
->Register
.Index
* TGSI_NUM_CHANNELS
+ swizzle
];
621 if (tgsi_type_is_64bit(type
)) {
622 ptr2
= ctx
->temps
[reg
->Register
.Index
* TGSI_NUM_CHANNELS
+ swizzle
+ 1];
623 return si_llvm_emit_fetch_64bit(bld_base
, type
,
624 LLVMBuildLoad(builder
, ptr
, ""),
625 LLVMBuildLoad(builder
, ptr2
, ""));
627 result
= LLVMBuildLoad(builder
, ptr
, "");
630 case TGSI_FILE_OUTPUT
:
631 ptr
= get_output_ptr(bld_base
, reg
->Register
.Index
, swizzle
);
632 if (tgsi_type_is_64bit(type
)) {
633 ptr2
= get_output_ptr(bld_base
, reg
->Register
.Index
, swizzle
+ 1);
634 return si_llvm_emit_fetch_64bit(bld_base
, type
,
635 LLVMBuildLoad(builder
, ptr
, ""),
636 LLVMBuildLoad(builder
, ptr2
, ""));
638 result
= LLVMBuildLoad(builder
, ptr
, "");
642 return LLVMGetUndef(tgsi2llvmtype(bld_base
, type
));
645 return bitcast(bld_base
, type
, result
);
648 static LLVMValueRef
fetch_system_value(struct lp_build_tgsi_context
*bld_base
,
649 const struct tgsi_full_src_register
*reg
,
650 enum tgsi_opcode_type type
,
653 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
654 LLVMBuilderRef builder
= ctx
->ac
.builder
;
655 LLVMValueRef cval
= ctx
->system_values
[reg
->Register
.Index
];
657 if (tgsi_type_is_64bit(type
)) {
660 assert(swizzle
== 0 || swizzle
== 2);
662 lo
= LLVMBuildExtractElement(
663 builder
, cval
, LLVMConstInt(ctx
->i32
, swizzle
, 0), "");
664 hi
= LLVMBuildExtractElement(
665 builder
, cval
, LLVMConstInt(ctx
->i32
, swizzle
+ 1, 0), "");
667 return si_llvm_emit_fetch_64bit(bld_base
, type
, lo
, hi
);
670 if (LLVMGetTypeKind(LLVMTypeOf(cval
)) == LLVMVectorTypeKind
) {
671 cval
= LLVMBuildExtractElement(
672 builder
, cval
, LLVMConstInt(ctx
->i32
, swizzle
, 0), "");
674 assert(swizzle
== 0);
677 return bitcast(bld_base
, type
, cval
);
680 static void emit_declaration(struct lp_build_tgsi_context
*bld_base
,
681 const struct tgsi_full_declaration
*decl
)
683 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
684 LLVMBuilderRef builder
= ctx
->ac
.builder
;
685 unsigned first
, last
, i
;
686 switch(decl
->Declaration
.File
) {
687 case TGSI_FILE_ADDRESS
:
690 for (idx
= decl
->Range
.First
; idx
<= decl
->Range
.Last
; idx
++) {
692 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; chan
++) {
693 ctx
->addrs
[idx
][chan
] = lp_build_alloca_undef(
701 case TGSI_FILE_TEMPORARY
:
704 LLVMValueRef array_alloca
= NULL
;
706 unsigned writemask
= decl
->Declaration
.UsageMask
;
707 first
= decl
->Range
.First
;
708 last
= decl
->Range
.Last
;
709 decl_size
= 4 * ((last
- first
) + 1);
711 if (decl
->Declaration
.Array
) {
712 unsigned id
= decl
->Array
.ArrayID
- 1;
715 writemask
&= ctx
->temp_arrays
[id
].writemask
;
716 ctx
->temp_arrays
[id
].writemask
= writemask
;
717 array_size
= ((last
- first
) + 1) * util_bitcount(writemask
);
719 /* If the array has more than 16 elements, store it
720 * in memory using an alloca that spans the entire
723 * Otherwise, store each array element individually.
724 * We will then generate vectors (per-channel, up to
725 * <16 x float> if the usagemask is a single bit) for
726 * indirect addressing.
728 * Note that 16 is the number of vector elements that
729 * LLVM will store in a register, so theoretically an
730 * array with up to 4 * 16 = 64 elements could be
731 * handled this way, but whether that's a good idea
732 * depends on VGPR register pressure elsewhere.
734 * FIXME: We shouldn't need to have the non-alloca
735 * code path for arrays. LLVM should be smart enough to
736 * promote allocas into registers when profitable.
738 if (array_size
> 16 ||
739 !ctx
->screen
->llvm_has_working_vgpr_indexing
) {
740 array_alloca
= lp_build_alloca_undef(&ctx
->gallivm
,
741 LLVMArrayType(ctx
->f32
,
742 array_size
), "array");
743 ctx
->temp_array_allocas
[id
] = array_alloca
;
747 if (!ctx
->temps_count
) {
748 ctx
->temps_count
= bld_base
->info
->file_max
[TGSI_FILE_TEMPORARY
] + 1;
749 ctx
->temps
= MALLOC(TGSI_NUM_CHANNELS
* ctx
->temps_count
* sizeof(LLVMValueRef
));
752 for (i
= 0; i
< decl_size
; ++i
) {
754 snprintf(name
, sizeof(name
), "TEMP%d.%c",
755 first
+ i
/ 4, "xyzw"[i
% 4]);
757 ctx
->temps
[first
* TGSI_NUM_CHANNELS
+ i
] =
758 lp_build_alloca_undef(&ctx
->gallivm
,
763 LLVMValueRef idxs
[2] = {
769 if (writemask
!= TGSI_WRITEMASK_XYZW
&&
770 !ctx
->undef_alloca
) {
771 /* Create a dummy alloca. We use it so that we
772 * have a pointer that is safe to load from if
773 * a shader ever reads from a channel that
774 * it never writes to.
776 ctx
->undef_alloca
= lp_build_alloca_undef(
781 for (i
= 0; i
< decl_size
; ++i
) {
783 if (writemask
& (1 << (i
% 4))) {
785 snprintf(name
, sizeof(name
), "TEMP%d.%c",
786 first
+ i
/ 4, "xyzw"[i
% 4]);
788 idxs
[1] = LLVMConstInt(ctx
->i32
, j
, 0);
789 ptr
= LLVMBuildGEP(builder
, array_alloca
, idxs
, 2, name
);
792 ptr
= ctx
->undef_alloca
;
794 ctx
->temps
[first
* TGSI_NUM_CHANNELS
+ i
] = ptr
;
799 case TGSI_FILE_INPUT
:
802 for (idx
= decl
->Range
.First
; idx
<= decl
->Range
.Last
; idx
++) {
803 if (ctx
->load_input
&&
804 ctx
->input_decls
[idx
].Declaration
.File
!= TGSI_FILE_INPUT
) {
805 ctx
->input_decls
[idx
] = *decl
;
806 ctx
->input_decls
[idx
].Range
.First
= idx
;
807 ctx
->input_decls
[idx
].Range
.Last
= idx
;
808 ctx
->input_decls
[idx
].Semantic
.Index
+= idx
- decl
->Range
.First
;
810 if (si_preload_fs_inputs(ctx
) ||
811 bld_base
->info
->processor
!= PIPE_SHADER_FRAGMENT
)
812 ctx
->load_input(ctx
, idx
, &ctx
->input_decls
[idx
],
813 &ctx
->inputs
[idx
* 4]);
819 case TGSI_FILE_SYSTEM_VALUE
:
822 for (idx
= decl
->Range
.First
; idx
<= decl
->Range
.Last
; idx
++) {
823 si_load_system_value(ctx
, idx
, decl
);
828 case TGSI_FILE_OUTPUT
:
832 for (idx
= decl
->Range
.First
; idx
<= decl
->Range
.Last
; idx
++) {
834 assert(idx
< RADEON_LLVM_MAX_OUTPUTS
);
835 if (ctx
->outputs
[idx
][0])
837 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; chan
++) {
839 snprintf(name
, sizeof(name
), "OUT%d.%c",
840 idx
, "xyzw"[chan
% 4]);
842 ctx
->outputs
[idx
][chan
] = lp_build_alloca_undef(
850 case TGSI_FILE_MEMORY
:
851 si_declare_compute_memory(ctx
, decl
);
859 void si_llvm_emit_store(struct lp_build_tgsi_context
*bld_base
,
860 const struct tgsi_full_instruction
*inst
,
861 const struct tgsi_opcode_info
*info
,
865 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
866 const struct tgsi_full_dst_register
*reg
= &inst
->Dst
[index
];
867 LLVMBuilderRef builder
= ctx
->ac
.builder
;
868 LLVMValueRef temp_ptr
, temp_ptr2
= NULL
;
869 bool is_vec_store
= false;
870 enum tgsi_opcode_type dtype
= tgsi_opcode_infer_dst_type(inst
->Instruction
.Opcode
, index
);
873 LLVMTypeKind k
= LLVMGetTypeKind(LLVMTypeOf(dst
[0]));
874 is_vec_store
= (k
== LLVMVectorTypeKind
);
878 LLVMValueRef values
[4] = {};
879 uint32_t writemask
= reg
->Register
.WriteMask
;
881 unsigned chan
= u_bit_scan(&writemask
);
882 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, chan
, 0);
883 values
[chan
] = LLVMBuildExtractElement(ctx
->ac
.builder
,
886 bld_base
->emit_store(bld_base
, inst
, info
, index
, values
);
890 uint32_t writemask
= reg
->Register
.WriteMask
;
892 unsigned chan_index
= u_bit_scan(&writemask
);
893 LLVMValueRef value
= dst
[chan_index
];
895 if (tgsi_type_is_64bit(dtype
) && (chan_index
== 1 || chan_index
== 3))
897 if (inst
->Instruction
.Saturate
)
898 value
= ac_build_clamp(&ctx
->ac
, value
);
900 if (reg
->Register
.File
== TGSI_FILE_ADDRESS
) {
901 temp_ptr
= ctx
->addrs
[reg
->Register
.Index
][chan_index
];
902 LLVMBuildStore(builder
, value
, temp_ptr
);
906 if (!tgsi_type_is_64bit(dtype
))
907 value
= ac_to_float(&ctx
->ac
, value
);
909 if (reg
->Register
.Indirect
) {
910 unsigned file
= reg
->Register
.File
;
911 unsigned reg_index
= reg
->Register
.Index
;
912 store_value_to_array(bld_base
, value
, file
, chan_index
,
913 reg_index
, ®
->Indirect
);
915 switch(reg
->Register
.File
) {
916 case TGSI_FILE_OUTPUT
:
917 temp_ptr
= ctx
->outputs
[reg
->Register
.Index
][chan_index
];
918 if (tgsi_type_is_64bit(dtype
))
919 temp_ptr2
= ctx
->outputs
[reg
->Register
.Index
][chan_index
+ 1];
922 case TGSI_FILE_TEMPORARY
:
924 if (reg
->Register
.Index
>= ctx
->temps_count
)
927 temp_ptr
= ctx
->temps
[ TGSI_NUM_CHANNELS
* reg
->Register
.Index
+ chan_index
];
928 if (tgsi_type_is_64bit(dtype
))
929 temp_ptr2
= ctx
->temps
[ TGSI_NUM_CHANNELS
* reg
->Register
.Index
+ chan_index
+ 1];
936 if (!tgsi_type_is_64bit(dtype
))
937 LLVMBuildStore(builder
, value
, temp_ptr
);
939 LLVMValueRef ptr
= LLVMBuildBitCast(builder
, value
,
940 LLVMVectorType(ctx
->i32
, 2), "");
942 value
= LLVMBuildExtractElement(builder
, ptr
,
944 val2
= LLVMBuildExtractElement(builder
, ptr
,
947 LLVMBuildStore(builder
, ac_to_float(&ctx
->ac
, value
), temp_ptr
);
948 LLVMBuildStore(builder
, ac_to_float(&ctx
->ac
, val2
), temp_ptr2
);
954 static void set_basicblock_name(LLVMBasicBlockRef bb
, const char *base
, int pc
)
957 /* Subtract 1 so that the number shown is that of the corresponding
958 * opcode in the TGSI dump, e.g. an if block has the same suffix as
959 * the instruction number of the corresponding TGSI IF.
961 snprintf(buf
, sizeof(buf
), "%s%d", base
, pc
- 1);
962 LLVMSetValueName(LLVMBasicBlockAsValue(bb
), buf
);
965 /* Append a basic block at the level of the parent flow.
967 static LLVMBasicBlockRef
append_basic_block(struct si_shader_context
*ctx
,
970 assert(ctx
->flow_depth
>= 1);
972 if (ctx
->flow_depth
>= 2) {
973 struct si_llvm_flow
*flow
= &ctx
->flow
[ctx
->flow_depth
- 2];
975 return LLVMInsertBasicBlockInContext(ctx
->ac
.context
,
976 flow
->next_block
, name
);
979 return LLVMAppendBasicBlockInContext(ctx
->ac
.context
, ctx
->main_fn
, name
);
982 /* Emit a branch to the given default target for the current block if
983 * applicable -- that is, if the current block does not already contain a
984 * branch from a break or continue.
986 static void emit_default_branch(LLVMBuilderRef builder
, LLVMBasicBlockRef target
)
988 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder
)))
989 LLVMBuildBr(builder
, target
);
992 static void bgnloop_emit(const struct lp_build_tgsi_action
*action
,
993 struct lp_build_tgsi_context
*bld_base
,
994 struct lp_build_emit_data
*emit_data
)
996 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
997 struct si_llvm_flow
*flow
= push_flow(ctx
);
998 flow
->loop_entry_block
= append_basic_block(ctx
, "LOOP");
999 flow
->next_block
= append_basic_block(ctx
, "ENDLOOP");
1000 set_basicblock_name(flow
->loop_entry_block
, "loop", bld_base
->pc
);
1001 LLVMBuildBr(ctx
->ac
.builder
, flow
->loop_entry_block
);
1002 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, flow
->loop_entry_block
);
1005 static void brk_emit(const struct lp_build_tgsi_action
*action
,
1006 struct lp_build_tgsi_context
*bld_base
,
1007 struct lp_build_emit_data
*emit_data
)
1009 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1010 struct si_llvm_flow
*flow
= get_innermost_loop(ctx
);
1012 LLVMBuildBr(ctx
->ac
.builder
, flow
->next_block
);
1015 static void cont_emit(const struct lp_build_tgsi_action
*action
,
1016 struct lp_build_tgsi_context
*bld_base
,
1017 struct lp_build_emit_data
*emit_data
)
1019 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1020 struct si_llvm_flow
*flow
= get_innermost_loop(ctx
);
1022 LLVMBuildBr(ctx
->ac
.builder
, flow
->loop_entry_block
);
1025 static void else_emit(const struct lp_build_tgsi_action
*action
,
1026 struct lp_build_tgsi_context
*bld_base
,
1027 struct lp_build_emit_data
*emit_data
)
1029 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1030 struct si_llvm_flow
*current_branch
= get_current_flow(ctx
);
1031 LLVMBasicBlockRef endif_block
;
1033 assert(!current_branch
->loop_entry_block
);
1035 endif_block
= append_basic_block(ctx
, "ENDIF");
1036 emit_default_branch(ctx
->ac
.builder
, endif_block
);
1038 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, current_branch
->next_block
);
1039 set_basicblock_name(current_branch
->next_block
, "else", bld_base
->pc
);
1041 current_branch
->next_block
= endif_block
;
1044 static void endif_emit(const struct lp_build_tgsi_action
*action
,
1045 struct lp_build_tgsi_context
*bld_base
,
1046 struct lp_build_emit_data
*emit_data
)
1048 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1049 struct si_llvm_flow
*current_branch
= get_current_flow(ctx
);
1051 assert(!current_branch
->loop_entry_block
);
1053 emit_default_branch(ctx
->ac
.builder
, current_branch
->next_block
);
1054 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, current_branch
->next_block
);
1055 set_basicblock_name(current_branch
->next_block
, "endif", bld_base
->pc
);
1060 static void endloop_emit(const struct lp_build_tgsi_action
*action
,
1061 struct lp_build_tgsi_context
*bld_base
,
1062 struct lp_build_emit_data
*emit_data
)
1064 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1065 struct si_llvm_flow
*current_loop
= get_current_flow(ctx
);
1067 assert(current_loop
->loop_entry_block
);
1069 emit_default_branch(ctx
->ac
.builder
, current_loop
->loop_entry_block
);
1071 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, current_loop
->next_block
);
1072 set_basicblock_name(current_loop
->next_block
, "endloop", bld_base
->pc
);
1076 static void if_cond_emit(const struct lp_build_tgsi_action
*action
,
1077 struct lp_build_tgsi_context
*bld_base
,
1078 struct lp_build_emit_data
*emit_data
,
1081 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1082 struct si_llvm_flow
*flow
= push_flow(ctx
);
1083 LLVMBasicBlockRef if_block
;
1085 if_block
= append_basic_block(ctx
, "IF");
1086 flow
->next_block
= append_basic_block(ctx
, "ELSE");
1087 set_basicblock_name(if_block
, "if", bld_base
->pc
);
1088 LLVMBuildCondBr(ctx
->ac
.builder
, cond
, if_block
, flow
->next_block
);
1089 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, if_block
);
1092 static void if_emit(const struct lp_build_tgsi_action
*action
,
1093 struct lp_build_tgsi_context
*bld_base
,
1094 struct lp_build_emit_data
*emit_data
)
1096 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1099 cond
= LLVMBuildFCmp(ctx
->ac
.builder
, LLVMRealUNE
,
1103 if_cond_emit(action
, bld_base
, emit_data
, cond
);
1106 static void uif_emit(const struct lp_build_tgsi_action
*action
,
1107 struct lp_build_tgsi_context
*bld_base
,
1108 struct lp_build_emit_data
*emit_data
)
1110 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1113 cond
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntNE
,
1114 ac_to_integer(&ctx
->ac
, emit_data
->args
[0]), ctx
->i32_0
, "");
1116 if_cond_emit(action
, bld_base
, emit_data
, cond
);
1119 static void emit_immediate(struct lp_build_tgsi_context
*bld_base
,
1120 const struct tgsi_full_immediate
*imm
)
1123 struct si_shader_context
*ctx
= si_shader_context(bld_base
);
1125 for (i
= 0; i
< 4; ++i
) {
1126 ctx
->imms
[ctx
->imms_num
* TGSI_NUM_CHANNELS
+ i
] =
1127 LLVMConstInt(ctx
->i32
, imm
->u
[i
].Uint
, false );
1133 void si_llvm_context_init(struct si_shader_context
*ctx
,
1134 struct si_screen
*sscreen
,
1135 LLVMTargetMachineRef tm
)
1137 struct lp_type type
;
1139 /* Initialize the gallivm object:
1140 * We are only using the module, context, and builder fields of this struct.
1141 * This should be enough for us to be able to pass our gallivm struct to the
1142 * helper functions in the gallivm module.
1144 memset(ctx
, 0, sizeof(*ctx
));
1145 ctx
->screen
= sscreen
;
1148 ctx
->gallivm
.context
= LLVMContextCreate();
1149 ctx
->gallivm
.module
= LLVMModuleCreateWithNameInContext("tgsi",
1150 ctx
->gallivm
.context
);
1151 LLVMSetTarget(ctx
->gallivm
.module
, "amdgcn--");
1153 LLVMTargetDataRef data_layout
= LLVMCreateTargetDataLayout(tm
);
1154 char *data_layout_str
= LLVMCopyStringRepOfTargetData(data_layout
);
1155 LLVMSetDataLayout(ctx
->gallivm
.module
, data_layout_str
);
1156 LLVMDisposeTargetData(data_layout
);
1157 LLVMDisposeMessage(data_layout_str
);
1159 bool unsafe_fpmath
= (sscreen
->debug_flags
& DBG(UNSAFE_MATH
)) != 0;
1160 enum lp_float_mode float_mode
=
1161 unsafe_fpmath
? LP_FLOAT_MODE_UNSAFE_FP_MATH
:
1162 LP_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH
;
1164 ctx
->gallivm
.builder
= lp_create_builder(ctx
->gallivm
.context
,
1167 ac_llvm_context_init(&ctx
->ac
, ctx
->gallivm
.context
, sscreen
->info
.chip_class
);
1168 ctx
->ac
.module
= ctx
->gallivm
.module
;
1169 ctx
->ac
.builder
= ctx
->gallivm
.builder
;
1171 struct lp_build_tgsi_context
*bld_base
= &ctx
->bld_base
;
1173 type
.floating
= true;
1180 lp_build_context_init(&bld_base
->base
, &ctx
->gallivm
, type
);
1181 lp_build_context_init(&ctx
->bld_base
.uint_bld
, &ctx
->gallivm
, lp_uint_type(type
));
1182 lp_build_context_init(&ctx
->bld_base
.int_bld
, &ctx
->gallivm
, lp_int_type(type
));
1184 lp_build_context_init(&ctx
->bld_base
.dbl_bld
, &ctx
->gallivm
, type
);
1185 lp_build_context_init(&ctx
->bld_base
.uint64_bld
, &ctx
->gallivm
, lp_uint_type(type
));
1186 lp_build_context_init(&ctx
->bld_base
.int64_bld
, &ctx
->gallivm
, lp_int_type(type
));
1189 bld_base
->emit_swizzle
= emit_swizzle
;
1190 bld_base
->emit_declaration
= emit_declaration
;
1191 bld_base
->emit_immediate
= emit_immediate
;
1193 /* metadata allowing 2.5 ULP */
1194 ctx
->fpmath_md_kind
= LLVMGetMDKindIDInContext(ctx
->ac
.context
,
1196 LLVMValueRef arg
= LLVMConstReal(ctx
->ac
.f32
, 2.5);
1197 ctx
->fpmath_md_2p5_ulp
= LLVMMDNodeInContext(ctx
->ac
.context
,
1200 bld_base
->op_actions
[TGSI_OPCODE_BGNLOOP
].emit
= bgnloop_emit
;
1201 bld_base
->op_actions
[TGSI_OPCODE_BRK
].emit
= brk_emit
;
1202 bld_base
->op_actions
[TGSI_OPCODE_CONT
].emit
= cont_emit
;
1203 bld_base
->op_actions
[TGSI_OPCODE_IF
].emit
= if_emit
;
1204 bld_base
->op_actions
[TGSI_OPCODE_UIF
].emit
= uif_emit
;
1205 bld_base
->op_actions
[TGSI_OPCODE_ELSE
].emit
= else_emit
;
1206 bld_base
->op_actions
[TGSI_OPCODE_ENDIF
].emit
= endif_emit
;
1207 bld_base
->op_actions
[TGSI_OPCODE_ENDLOOP
].emit
= endloop_emit
;
1209 si_shader_context_init_alu(&ctx
->bld_base
);
1210 si_shader_context_init_mem(ctx
);
1212 ctx
->voidt
= LLVMVoidTypeInContext(ctx
->ac
.context
);
1213 ctx
->i1
= LLVMInt1TypeInContext(ctx
->ac
.context
);
1214 ctx
->i8
= LLVMInt8TypeInContext(ctx
->ac
.context
);
1215 ctx
->i32
= LLVMInt32TypeInContext(ctx
->ac
.context
);
1216 ctx
->i64
= LLVMInt64TypeInContext(ctx
->ac
.context
);
1217 ctx
->i128
= LLVMIntTypeInContext(ctx
->ac
.context
, 128);
1218 ctx
->f32
= LLVMFloatTypeInContext(ctx
->ac
.context
);
1219 ctx
->v2i32
= LLVMVectorType(ctx
->i32
, 2);
1220 ctx
->v4i32
= LLVMVectorType(ctx
->i32
, 4);
1221 ctx
->v4f32
= LLVMVectorType(ctx
->f32
, 4);
1222 ctx
->v8i32
= LLVMVectorType(ctx
->i32
, 8);
1224 ctx
->i32_0
= LLVMConstInt(ctx
->i32
, 0, 0);
1225 ctx
->i32_1
= LLVMConstInt(ctx
->i32
, 1, 0);
1228 /* Set the context to a certain TGSI shader. Can be called repeatedly
1229 * to change the shader. */
1230 void si_llvm_context_set_tgsi(struct si_shader_context
*ctx
,
1231 struct si_shader
*shader
)
1233 const struct tgsi_shader_info
*info
= NULL
;
1234 const struct tgsi_token
*tokens
= NULL
;
1236 if (shader
&& shader
->selector
) {
1237 info
= &shader
->selector
->info
;
1238 tokens
= shader
->selector
->tokens
;
1241 ctx
->shader
= shader
;
1242 ctx
->type
= info
? info
->processor
: -1;
1243 ctx
->bld_base
.info
= info
;
1245 /* Clean up the old contents. */
1246 FREE(ctx
->temp_arrays
);
1247 ctx
->temp_arrays
= NULL
;
1248 FREE(ctx
->temp_array_allocas
);
1249 ctx
->temp_array_allocas
= NULL
;
1257 ctx
->temps_count
= 0;
1259 if (!info
|| !tokens
)
1262 if (info
->array_max
[TGSI_FILE_TEMPORARY
] > 0) {
1263 int size
= info
->array_max
[TGSI_FILE_TEMPORARY
];
1265 ctx
->temp_arrays
= CALLOC(size
, sizeof(ctx
->temp_arrays
[0]));
1266 ctx
->temp_array_allocas
= CALLOC(size
, sizeof(ctx
->temp_array_allocas
[0]));
1268 tgsi_scan_arrays(tokens
, TGSI_FILE_TEMPORARY
, size
,
1271 if (info
->file_max
[TGSI_FILE_IMMEDIATE
] >= 0) {
1272 int size
= info
->file_max
[TGSI_FILE_IMMEDIATE
] + 1;
1273 ctx
->imms
= MALLOC(size
* TGSI_NUM_CHANNELS
* sizeof(LLVMValueRef
));
1276 /* Re-set these to start with a clean slate. */
1277 ctx
->bld_base
.num_instructions
= 0;
1278 ctx
->bld_base
.pc
= 0;
1279 memset(ctx
->outputs
, 0, sizeof(ctx
->outputs
));
1281 ctx
->bld_base
.emit_store
= si_llvm_emit_store
;
1282 ctx
->bld_base
.emit_fetch_funcs
[TGSI_FILE_IMMEDIATE
] = si_llvm_emit_fetch
;
1283 ctx
->bld_base
.emit_fetch_funcs
[TGSI_FILE_INPUT
] = si_llvm_emit_fetch
;
1284 ctx
->bld_base
.emit_fetch_funcs
[TGSI_FILE_TEMPORARY
] = si_llvm_emit_fetch
;
1285 ctx
->bld_base
.emit_fetch_funcs
[TGSI_FILE_OUTPUT
] = si_llvm_emit_fetch
;
1286 ctx
->bld_base
.emit_fetch_funcs
[TGSI_FILE_SYSTEM_VALUE
] = fetch_system_value
;
1288 ctx
->num_const_buffers
= util_last_bit(info
->const_buffers_declared
);
1289 ctx
->num_shader_buffers
= util_last_bit(info
->shader_buffers_declared
);
1290 ctx
->num_samplers
= util_last_bit(info
->samplers_declared
);
1291 ctx
->num_images
= util_last_bit(info
->images_declared
);
1294 void si_llvm_create_func(struct si_shader_context
*ctx
,
1296 LLVMTypeRef
*return_types
, unsigned num_return_elems
,
1297 LLVMTypeRef
*ParamTypes
, unsigned ParamCount
)
1299 LLVMTypeRef main_fn_type
, ret_type
;
1300 LLVMBasicBlockRef main_fn_body
;
1301 enum si_llvm_calling_convention call_conv
;
1302 unsigned real_shader_type
;
1304 if (num_return_elems
)
1305 ret_type
= LLVMStructTypeInContext(ctx
->ac
.context
,
1307 num_return_elems
, true);
1309 ret_type
= ctx
->voidt
;
1311 /* Setup the function */
1312 ctx
->return_type
= ret_type
;
1313 main_fn_type
= LLVMFunctionType(ret_type
, ParamTypes
, ParamCount
, 0);
1314 ctx
->main_fn
= LLVMAddFunction(ctx
->gallivm
.module
, name
, main_fn_type
);
1315 main_fn_body
= LLVMAppendBasicBlockInContext(ctx
->ac
.context
,
1316 ctx
->main_fn
, "main_body");
1317 LLVMPositionBuilderAtEnd(ctx
->ac
.builder
, main_fn_body
);
1319 real_shader_type
= ctx
->type
;
1321 /* LS is merged into HS (TCS), and ES is merged into GS. */
1322 if (ctx
->screen
->info
.chip_class
>= GFX9
) {
1323 if (ctx
->shader
->key
.as_ls
)
1324 real_shader_type
= PIPE_SHADER_TESS_CTRL
;
1325 else if (ctx
->shader
->key
.as_es
)
1326 real_shader_type
= PIPE_SHADER_GEOMETRY
;
1329 switch (real_shader_type
) {
1330 case PIPE_SHADER_VERTEX
:
1331 case PIPE_SHADER_TESS_EVAL
:
1332 call_conv
= RADEON_LLVM_AMDGPU_VS
;
1334 case PIPE_SHADER_TESS_CTRL
:
1335 call_conv
= HAVE_LLVM
>= 0x0500 ? RADEON_LLVM_AMDGPU_HS
:
1336 RADEON_LLVM_AMDGPU_VS
;
1338 case PIPE_SHADER_GEOMETRY
:
1339 call_conv
= RADEON_LLVM_AMDGPU_GS
;
1341 case PIPE_SHADER_FRAGMENT
:
1342 call_conv
= RADEON_LLVM_AMDGPU_PS
;
1344 case PIPE_SHADER_COMPUTE
:
1345 call_conv
= RADEON_LLVM_AMDGPU_CS
;
1348 unreachable("Unhandle shader type");
1351 LLVMSetFunctionCallConv(ctx
->main_fn
, call_conv
);
1354 void si_llvm_optimize_module(struct si_shader_context
*ctx
)
1356 struct gallivm_state
*gallivm
= &ctx
->gallivm
;
1357 const char *triple
= LLVMGetTarget(gallivm
->module
);
1358 LLVMTargetLibraryInfoRef target_library_info
;
1360 /* Dump LLVM IR before any optimization passes */
1361 if (ctx
->screen
->debug_flags
& DBG(PREOPT_IR
) &&
1362 si_can_dump_shader(ctx
->screen
, ctx
->type
))
1363 LLVMDumpModule(ctx
->gallivm
.module
);
1365 /* Create the pass manager */
1366 gallivm
->passmgr
= LLVMCreatePassManager();
1368 target_library_info
= gallivm_create_target_library_info(triple
);
1369 LLVMAddTargetLibraryInfo(target_library_info
, gallivm
->passmgr
);
1371 if (si_extra_shader_checks(ctx
->screen
, ctx
->type
))
1372 LLVMAddVerifierPass(gallivm
->passmgr
);
1374 LLVMAddAlwaysInlinerPass(gallivm
->passmgr
);
1376 /* This pass should eliminate all the load and store instructions */
1377 LLVMAddPromoteMemoryToRegisterPass(gallivm
->passmgr
);
1379 /* Add some optimization passes */
1380 LLVMAddScalarReplAggregatesPass(gallivm
->passmgr
);
1381 LLVMAddLICMPass(gallivm
->passmgr
);
1382 LLVMAddAggressiveDCEPass(gallivm
->passmgr
);
1383 LLVMAddCFGSimplificationPass(gallivm
->passmgr
);
1384 #if HAVE_LLVM >= 0x0400
1385 /* This is recommended by the instruction combining pass. */
1386 LLVMAddEarlyCSEMemSSAPass(gallivm
->passmgr
);
1388 LLVMAddInstructionCombiningPass(gallivm
->passmgr
);
1391 LLVMRunPassManager(gallivm
->passmgr
, ctx
->gallivm
.module
);
1393 LLVMDisposeBuilder(ctx
->ac
.builder
);
1394 LLVMDisposePassManager(gallivm
->passmgr
);
1395 gallivm_dispose_target_library_info(target_library_info
);
1398 void si_llvm_dispose(struct si_shader_context
*ctx
)
1400 LLVMDisposeModule(ctx
->gallivm
.module
);
1401 LLVMContextDispose(ctx
->gallivm
.context
);
1402 FREE(ctx
->temp_arrays
);
1403 ctx
->temp_arrays
= NULL
;
1404 FREE(ctx
->temp_array_allocas
);
1405 ctx
->temp_array_allocas
= NULL
;
1408 ctx
->temps_count
= 0;
1414 ctx
->flow_depth_max
= 0;