src/amd/vulkan/radv_meta.c

   1 /*
   2  * Copyright © 2016 Red Hat
   3  * based on intel anv code:
   4  * Copyright © 2015 Intel Corporation
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23  * IN THE SOFTWARE.
  24  */
  25
  26 #include "radv_meta.h"
  27
  28 #include <fcntl.h>
  29 #include <limits.h>
  30 #include <pwd.h>
  31 #include <sys/stat.h>
  32
  33 void
  34 radv_meta_save(struct radv_meta_saved_state *state,
  35                struct radv_cmd_buffer *cmd_buffer, uint32_t flags)
  36 {
  37         assert(flags & (RADV_META_SAVE_GRAPHICS_PIPELINE |
  38                         RADV_META_SAVE_COMPUTE_PIPELINE));
  39
  40         state->flags = flags;
  41
  42         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
  43                 assert(!(state->flags & RADV_META_SAVE_COMPUTE_PIPELINE));
  44
  45                 state->old_pipeline = cmd_buffer->state.pipeline;
  46
  47                 /* Save all viewports. */
  48                 state->viewport.count = cmd_buffer->state.dynamic.viewport.count;
  49                 typed_memcpy(state->viewport.viewports,
  50                              cmd_buffer->state.dynamic.viewport.viewports,
  51                              MAX_VIEWPORTS);
  52
  53                 /* Save all scissors. */
  54                 state->scissor.count = cmd_buffer->state.dynamic.scissor.count;
  55                 typed_memcpy(state->scissor.scissors,
  56                              cmd_buffer->state.dynamic.scissor.scissors,
  57                              MAX_SCISSORS);
  58
  59                 /* The most common meta operations all want to have the
  60                  * viewport reset and any scissors disabled. The rest of the
  61                  * dynamic state should have no effect.
  62                  */
  63                 cmd_buffer->state.dynamic.viewport.count = 0;
  64                 cmd_buffer->state.dynamic.scissor.count = 0;
  65                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
  66                                            1 << VK_DYNAMIC_STATE_SCISSOR;
  67         }
  68
  69         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
  70                 assert(!(state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE));
  71
  72                 state->old_pipeline = cmd_buffer->state.compute_pipeline;
  73         }
  74
  75         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
  76                 state->old_descriptor_set0 = cmd_buffer->state.descriptors[0];
  77         }
  78
  79         if (state->flags & RADV_META_SAVE_CONSTANTS) {
  80                 memcpy(state->push_constants, cmd_buffer->push_constants,
  81                        MAX_PUSH_CONSTANTS_SIZE);
  82         }
  83
  84         if (state->flags & RADV_META_SAVE_PASS) {
  85                 state->pass = cmd_buffer->state.pass;
  86                 state->subpass = cmd_buffer->state.subpass;
  87                 state->framebuffer = cmd_buffer->state.framebuffer;
  88                 state->attachments = cmd_buffer->state.attachments;
  89                 state->render_area = cmd_buffer->state.render_area;
  90         }
  91 }
  92
  93 void
  94 radv_meta_restore(const struct radv_meta_saved_state *state,
  95                   struct radv_cmd_buffer *cmd_buffer)
  96 {
  97         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
  98                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
  99                                      VK_PIPELINE_BIND_POINT_GRAPHICS,
 100                                      radv_pipeline_to_handle(state->old_pipeline));
 101
 102                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_PIPELINE;
 103
 104                 /* Restore all viewports. */
 105                 cmd_buffer->state.dynamic.viewport.count = state->viewport.count;
 106                 typed_memcpy(cmd_buffer->state.dynamic.viewport.viewports,
 107                              state->viewport.viewports,
 108                              MAX_VIEWPORTS);
 109
 110                 /* Restore all scissors. */
 111                 cmd_buffer->state.dynamic.scissor.count = state->scissor.count;
 112                 typed_memcpy(cmd_buffer->state.dynamic.scissor.scissors,
 113                              state->scissor.scissors,
 114                              MAX_SCISSORS);
 115
 116                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
 117                                            1 << VK_DYNAMIC_STATE_SCISSOR;
 118         }
 119
 120         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
 121                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 122                                      VK_PIPELINE_BIND_POINT_COMPUTE,
 123                                      radv_pipeline_to_handle(state->old_pipeline));
 124         }
 125
 126         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
 127                 radv_set_descriptor_set(cmd_buffer, state->old_descriptor_set0, 0);
 128         }
 129
 130         if (state->flags & RADV_META_SAVE_CONSTANTS) {
 131                 memcpy(cmd_buffer->push_constants, state->push_constants,
 132                        MAX_PUSH_CONSTANTS_SIZE);
 133                 cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_COMPUTE_BIT;
 134
 135                 if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 136                         cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_ALL_GRAPHICS;
 137                 }
 138         }
 139
 140         if (state->flags & RADV_META_SAVE_PASS) {
 141                 cmd_buffer->state.pass = state->pass;
 142                 cmd_buffer->state.subpass = state->subpass;
 143                 cmd_buffer->state.framebuffer = state->framebuffer;
 144                 cmd_buffer->state.attachments = state->attachments;
 145                 cmd_buffer->state.render_area = state->render_area;
 146                 if (state->subpass)
 147                         radv_emit_framebuffer_state(cmd_buffer);
 148         }
 149 }
 150
 151 VkImageViewType
 152 radv_meta_get_view_type(const struct radv_image *image)
 153 {
 154         switch (image->type) {
 155         case VK_IMAGE_TYPE_1D: return VK_IMAGE_VIEW_TYPE_1D;
 156         case VK_IMAGE_TYPE_2D: return VK_IMAGE_VIEW_TYPE_2D;
 157         case VK_IMAGE_TYPE_3D: return VK_IMAGE_VIEW_TYPE_3D;
 158         default:
 159                 unreachable("bad VkImageViewType");
 160         }
 161 }
 162
 163 /**
 164  * When creating a destination VkImageView, this function provides the needed
 165  * VkImageViewCreateInfo::subresourceRange::baseArrayLayer.
 166  */
 167 uint32_t
 168 radv_meta_get_iview_layer(const struct radv_image *dest_image,
 169                           const VkImageSubresourceLayers *dest_subresource,
 170                           const VkOffset3D *dest_offset)
 171 {
 172         switch (dest_image->type) {
 173         case VK_IMAGE_TYPE_1D:
 174         case VK_IMAGE_TYPE_2D:
 175                 return dest_subresource->baseArrayLayer;
 176         case VK_IMAGE_TYPE_3D:
 177                 /* HACK: Vulkan does not allow attaching a 3D image to a framebuffer,
 178                  * but meta does it anyway. When doing so, we translate the
 179                  * destination's z offset into an array offset.
 180                  */
 181                 return dest_offset->z;
 182         default:
 183                 assert(!"bad VkImageType");
 184                 return 0;
 185         }
 186 }
 187
 188 static void *
 189 meta_alloc(void* _device, size_t size, size_t alignment,
 190            VkSystemAllocationScope allocationScope)
 191 {
 192         struct radv_device *device = _device;
 193         return device->alloc.pfnAllocation(device->alloc.pUserData, size, alignment,
 194                                            VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 195 }
 196
 197 static void *
 198 meta_realloc(void* _device, void *original, size_t size, size_t alignment,
 199              VkSystemAllocationScope allocationScope)
 200 {
 201         struct radv_device *device = _device;
 202         return device->alloc.pfnReallocation(device->alloc.pUserData, original,
 203                                              size, alignment,
 204                                              VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 205 }
 206
 207 static void
 208 meta_free(void* _device, void *data)
 209 {
 210         struct radv_device *device = _device;
 211         return device->alloc.pfnFree(device->alloc.pUserData, data);
 212 }
 213
 214 static bool
 215 radv_builtin_cache_path(char *path)
 216 {
 217         char *xdg_cache_home = getenv("XDG_CACHE_HOME");
 218         const char *suffix = "/radv_builtin_shaders";
 219         const char *suffix2 = "/.cache/radv_builtin_shaders";
 220         struct passwd pwd, *result;
 221         char path2[PATH_MAX + 1]; /* PATH_MAX is not a real max,but suffices here. */
 222
 223         if (xdg_cache_home) {
 224
 225                 if (strlen(xdg_cache_home) + strlen(suffix) > PATH_MAX)
 226                         return false;
 227
 228                 strcpy(path, xdg_cache_home);
 229                 strcat(path, suffix);
 230                 return true;
 231         }
 232
 233         getpwuid_r(getuid(), &pwd, path2, PATH_MAX - strlen(suffix2), &result);
 234         if (!result)
 235                 return false;
 236
 237         strcpy(path, pwd.pw_dir);
 238         strcat(path, "/.cache");
 239         mkdir(path, 0755);
 240
 241         strcat(path, suffix);
 242         return true;
 243 }
 244
 245 static void
 246 radv_load_meta_pipeline(struct radv_device *device)
 247 {
 248         char path[PATH_MAX + 1];
 249         struct stat st;
 250         void *data = NULL;
 251
 252         if (!radv_builtin_cache_path(path))
 253                 return;
 254
 255         int fd = open(path, O_RDONLY);
 256         if (fd < 0)
 257                 return;
 258         if (fstat(fd, &st))
 259                 goto fail;
 260         data = malloc(st.st_size);
 261         if (!data)
 262                 goto fail;
 263         if(read(fd, data, st.st_size) == -1)
 264                 goto fail;
 265
 266         radv_pipeline_cache_load(&device->meta_state.cache, data, st.st_size);
 267 fail:
 268         free(data);
 269         close(fd);
 270 }
 271
 272 static void
 273 radv_store_meta_pipeline(struct radv_device *device)
 274 {
 275         char path[PATH_MAX + 1], path2[PATH_MAX + 7];
 276         size_t size;
 277         void *data = NULL;
 278
 279         if (!device->meta_state.cache.modified)
 280                 return;
 281
 282         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 283                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 284                                       &size, NULL))
 285                 return;
 286
 287         if (!radv_builtin_cache_path(path))
 288                 return;
 289
 290         strcpy(path2, path);
 291         strcat(path2, "XXXXXX");
 292         int fd = mkstemp(path2);//open(path, O_WRONLY | O_CREAT, 0600);
 293         if (fd < 0)
 294                 return;
 295         data = malloc(size);
 296         if (!data)
 297                 goto fail;
 298
 299         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 300                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 301                                       &size, data))
 302                 goto fail;
 303         if(write(fd, data, size) == -1)
 304                 goto fail;
 305
 306         rename(path2, path);
 307 fail:
 308         free(data);
 309         close(fd);
 310         unlink(path2);
 311 }
 312
 313 VkResult
 314 radv_device_init_meta(struct radv_device *device)
 315 {
 316         VkResult result;
 317
 318         device->meta_state.alloc = (VkAllocationCallbacks) {
 319                 .pUserData = device,
 320                 .pfnAllocation = meta_alloc,
 321                 .pfnReallocation = meta_realloc,
 322                 .pfnFree = meta_free,
 323         };
 324
 325         device->meta_state.cache.alloc = device->meta_state.alloc;
 326         radv_pipeline_cache_init(&device->meta_state.cache, device);
 327         radv_load_meta_pipeline(device);
 328
 329         result = radv_device_init_meta_clear_state(device);
 330         if (result != VK_SUCCESS)
 331                 goto fail_clear;
 332
 333         result = radv_device_init_meta_resolve_state(device);
 334         if (result != VK_SUCCESS)
 335                 goto fail_resolve;
 336
 337         result = radv_device_init_meta_blit_state(device);
 338         if (result != VK_SUCCESS)
 339                 goto fail_blit;
 340
 341         result = radv_device_init_meta_blit2d_state(device);
 342         if (result != VK_SUCCESS)
 343                 goto fail_blit2d;
 344
 345         result = radv_device_init_meta_bufimage_state(device);
 346         if (result != VK_SUCCESS)
 347                 goto fail_bufimage;
 348
 349         result = radv_device_init_meta_depth_decomp_state(device);
 350         if (result != VK_SUCCESS)
 351                 goto fail_depth_decomp;
 352
 353         result = radv_device_init_meta_buffer_state(device);
 354         if (result != VK_SUCCESS)
 355                 goto fail_buffer;
 356
 357         result = radv_device_init_meta_query_state(device);
 358         if (result != VK_SUCCESS)
 359                 goto fail_query;
 360
 361         result = radv_device_init_meta_fast_clear_flush_state(device);
 362         if (result != VK_SUCCESS)
 363                 goto fail_fast_clear;
 364
 365         result = radv_device_init_meta_resolve_compute_state(device);
 366         if (result != VK_SUCCESS)
 367                 goto fail_resolve_compute;
 368
 369         result = radv_device_init_meta_resolve_fragment_state(device);
 370         if (result != VK_SUCCESS)
 371                 goto fail_resolve_fragment;
 372         return VK_SUCCESS;
 373
 374 fail_resolve_fragment:
 375         radv_device_finish_meta_resolve_compute_state(device);
 376 fail_resolve_compute:
 377         radv_device_finish_meta_fast_clear_flush_state(device);
 378 fail_fast_clear:
 379         radv_device_finish_meta_buffer_state(device);
 380 fail_query:
 381         radv_device_finish_meta_query_state(device);
 382 fail_buffer:
 383         radv_device_finish_meta_depth_decomp_state(device);
 384 fail_depth_decomp:
 385         radv_device_finish_meta_bufimage_state(device);
 386 fail_bufimage:
 387         radv_device_finish_meta_blit2d_state(device);
 388 fail_blit2d:
 389         radv_device_finish_meta_blit_state(device);
 390 fail_blit:
 391         radv_device_finish_meta_resolve_state(device);
 392 fail_resolve:
 393         radv_device_finish_meta_clear_state(device);
 394 fail_clear:
 395         radv_pipeline_cache_finish(&device->meta_state.cache);
 396         return result;
 397 }
 398
 399 void
 400 radv_device_finish_meta(struct radv_device *device)
 401 {
 402         radv_device_finish_meta_clear_state(device);
 403         radv_device_finish_meta_resolve_state(device);
 404         radv_device_finish_meta_blit_state(device);
 405         radv_device_finish_meta_blit2d_state(device);
 406         radv_device_finish_meta_bufimage_state(device);
 407         radv_device_finish_meta_depth_decomp_state(device);
 408         radv_device_finish_meta_query_state(device);
 409         radv_device_finish_meta_buffer_state(device);
 410         radv_device_finish_meta_fast_clear_flush_state(device);
 411         radv_device_finish_meta_resolve_compute_state(device);
 412         radv_device_finish_meta_resolve_fragment_state(device);
 413
 414         radv_store_meta_pipeline(device);
 415         radv_pipeline_cache_finish(&device->meta_state.cache);
 416 }
 417
 418 nir_ssa_def *radv_meta_gen_rect_vertices_comp2(nir_builder *vs_b, nir_ssa_def *comp2)
 419 {
 420
 421         nir_intrinsic_instr *vertex_id = nir_intrinsic_instr_create(vs_b->shader, nir_intrinsic_load_vertex_id_zero_base);
 422         nir_ssa_dest_init(&vertex_id->instr, &vertex_id->dest, 1, 32, "vertexid");
 423         nir_builder_instr_insert(vs_b, &vertex_id->instr);
 424
 425         /* vertex 0 - -1.0, -1.0 */
 426         /* vertex 1 - -1.0, 1.0 */
 427         /* vertex 2 - 1.0, -1.0 */
 428         /* so channel 0 is vertex_id != 2 ? -1.0 : 1.0
 429            channel 1 is vertex id != 1 ? -1.0 : 1.0 */
 430
 431         nir_ssa_def *c0cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 432                                      nir_imm_int(vs_b, 2));
 433         nir_ssa_def *c1cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 434                                      nir_imm_int(vs_b, 1));
 435
 436         nir_ssa_def *comp[4];
 437         comp[0] = nir_bcsel(vs_b, c0cmp,
 438                             nir_imm_float(vs_b, -1.0),
 439                             nir_imm_float(vs_b, 1.0));
 440
 441         comp[1] = nir_bcsel(vs_b, c1cmp,
 442                             nir_imm_float(vs_b, -1.0),
 443                             nir_imm_float(vs_b, 1.0));
 444         comp[2] = comp2;
 445         comp[3] = nir_imm_float(vs_b, 1.0);
 446         nir_ssa_def *outvec = nir_vec(vs_b, comp, 4);
 447
 448         return outvec;
 449 }
 450
 451 nir_ssa_def *radv_meta_gen_rect_vertices(nir_builder *vs_b)
 452 {
 453         return radv_meta_gen_rect_vertices_comp2(vs_b, nir_imm_float(vs_b, 0.0));
 454 }
 455
 456 /* vertex shader that generates vertices */
 457 nir_shader *
 458 radv_meta_build_nir_vs_generate_vertices(void)
 459 {
 460         const struct glsl_type *vec4 = glsl_vec4_type();
 461
 462         nir_builder b;
 463         nir_variable *v_position;
 464
 465         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_VERTEX, NULL);
 466         b.shader->info.name = ralloc_strdup(b.shader, "meta_vs_gen_verts");
 467
 468         nir_ssa_def *outvec = radv_meta_gen_rect_vertices(&b);
 469
 470         v_position = nir_variable_create(b.shader, nir_var_shader_out, vec4,
 471                                          "gl_Position");
 472         v_position->data.location = VARYING_SLOT_POS;
 473
 474         nir_store_var(&b, v_position, outvec, 0xf);
 475
 476         return b.shader;
 477 }
 478
 479 nir_shader *
 480 radv_meta_build_nir_fs_noop(void)
 481 {
 482         nir_builder b;
 483
 484         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, NULL);
 485         b.shader->info.name = ralloc_asprintf(b.shader,
 486                                                "meta_noop_fs");
 487
 488         return b.shader;
 489 }
 490
 491 void radv_meta_build_resolve_shader_core(nir_builder *b,
 492                                          bool is_integer,
 493                                          int samples,
 494                                          nir_variable *input_img,
 495                                          nir_variable *color,
 496                                          nir_ssa_def *img_coord)
 497 {
 498         /* do a txf_ms on each sample */
 499         nir_ssa_def *tmp;
 500         nir_if *outer_if = NULL;
 501
 502         nir_tex_instr *tex = nir_tex_instr_create(b->shader, 2);
 503         tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
 504         tex->op = nir_texop_txf_ms;
 505         tex->src[0].src_type = nir_tex_src_coord;
 506         tex->src[0].src = nir_src_for_ssa(img_coord);
 507         tex->src[1].src_type = nir_tex_src_ms_index;
 508         tex->src[1].src = nir_src_for_ssa(nir_imm_int(b, 0));
 509         tex->dest_type = nir_type_float;
 510         tex->is_array = false;
 511         tex->coord_components = 2;
 512         tex->texture = nir_deref_var_create(tex, input_img);
 513         tex->sampler = NULL;
 514
 515         nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, "tex");
 516         nir_builder_instr_insert(b, &tex->instr);
 517
 518         tmp = &tex->dest.ssa;
 519
 520         if (!is_integer && samples > 1) {
 521                 nir_tex_instr *tex_all_same = nir_tex_instr_create(b->shader, 1);
 522                 tex_all_same->sampler_dim = GLSL_SAMPLER_DIM_MS;
 523                 tex_all_same->op = nir_texop_samples_identical;
 524                 tex_all_same->src[0].src_type = nir_tex_src_coord;
 525                 tex_all_same->src[0].src = nir_src_for_ssa(img_coord);
 526                 tex_all_same->dest_type = nir_type_float;
 527                 tex_all_same->is_array = false;
 528                 tex_all_same->coord_components = 2;
 529                 tex_all_same->texture = nir_deref_var_create(tex_all_same, input_img);
 530                 tex_all_same->sampler = NULL;
 531
 532                 nir_ssa_dest_init(&tex_all_same->instr, &tex_all_same->dest, 1, 32, "tex");
 533                 nir_builder_instr_insert(b, &tex_all_same->instr);
 534
 535                 nir_ssa_def *all_same = nir_ine(b, &tex_all_same->dest.ssa, nir_imm_int(b, 0));
 536                 nir_if *if_stmt = nir_if_create(b->shader);
 537                 if_stmt->condition = nir_src_for_ssa(all_same);
 538                 nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
 539
 540                 b->cursor = nir_after_cf_list(&if_stmt->then_list);
 541                 for (int i = 1; i < samples; i++) {
 542                         nir_tex_instr *tex_add = nir_tex_instr_create(b->shader, 2);
 543                         tex_add->sampler_dim = GLSL_SAMPLER_DIM_MS;
 544                         tex_add->op = nir_texop_txf_ms;
 545                         tex_add->src[0].src_type = nir_tex_src_coord;
 546                         tex_add->src[0].src = nir_src_for_ssa(img_coord);
 547                         tex_add->src[1].src_type = nir_tex_src_ms_index;
 548                         tex_add->src[1].src = nir_src_for_ssa(nir_imm_int(b, i));
 549                         tex_add->dest_type = nir_type_float;
 550                         tex_add->is_array = false;
 551                         tex_add->coord_components = 2;
 552                         tex_add->texture = nir_deref_var_create(tex_add, input_img);
 553                         tex_add->sampler = NULL;
 554
 555                         nir_ssa_dest_init(&tex_add->instr, &tex_add->dest, 4, 32, "tex");
 556                         nir_builder_instr_insert(b, &tex_add->instr);
 557
 558                         tmp = nir_fadd(b, tmp, &tex_add->dest.ssa);
 559                 }
 560
 561                 tmp = nir_fdiv(b, tmp, nir_imm_float(b, samples));
 562                 nir_store_var(b, color, tmp, 0xf);
 563                 b->cursor = nir_after_cf_list(&if_stmt->else_list);
 564                 outer_if = if_stmt;
 565         }
 566         nir_store_var(b, color, &tex->dest.ssa, 0xf);
 567
 568         if (outer_if)
 569                 b->cursor = nir_after_cf_node(&outer_if->cf_node);
 570 }