src/glsl/nir/nir_print.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   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:
  10  *
  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
  13  * Software.
  14  *
  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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Connor Abbott (cwabbott0@gmail.com)
  25  *
  26  */
  27
  28 #include "nir.h"
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31
  32 static void
  33 print_tabs(unsigned num_tabs, FILE *fp)
  34 {
  35    for (unsigned i = 0; i < num_tabs; i++)
  36       fprintf(fp, "\t");
  37 }
  38
  39 typedef struct {
  40    /** map from nir_variable -> printable name */
  41    struct hash_table *ht;
  42
  43    /** set of names used so far for nir_variables */
  44    struct set *syms;
  45
  46    /* an index used to make new non-conflicting names */
  47    unsigned index;
  48 } print_var_state;
  49
  50 static void
  51 print_register(nir_register *reg, FILE *fp)
  52 {
  53    if (reg->name != NULL)
  54       fprintf(fp, "/* %s */ ", reg->name);
  55    if (reg->is_global)
  56       fprintf(fp, "gr%u", reg->index);
  57    else
  58       fprintf(fp, "r%u", reg->index);
  59 }
  60
  61 static const char *sizes[] = { "error", "vec1", "vec2", "vec3", "vec4" };
  62
  63 static void
  64 print_register_decl(nir_register *reg, FILE *fp)
  65 {
  66    fprintf(fp, "decl_reg %s ", sizes[reg->num_components]);
  67    if (reg->is_packed)
  68       fprintf(fp, "(packed) ");
  69    print_register(reg, fp);
  70    if (reg->num_array_elems != 0)
  71       fprintf(fp, "[%u]", reg->num_array_elems);
  72    fprintf(fp, "\n");
  73 }
  74
  75 static void
  76 print_ssa_def(nir_ssa_def *def, FILE *fp)
  77 {
  78    if (def->name != NULL)
  79       fprintf(fp, "/* %s */ ", def->name);
  80    fprintf(fp, "%s ssa_%u", sizes[def->num_components], def->index);
  81 }
  82
  83 static void
  84 print_ssa_use(nir_ssa_def *def, FILE *fp)
  85 {
  86    if (def->name != NULL)
  87       fprintf(fp, "/* %s */ ", def->name);
  88    fprintf(fp, "ssa_%u", def->index);
  89 }
  90
  91 static void print_src(nir_src *src, FILE *fp);
  92
  93 static void
  94 print_reg_src(nir_reg_src *src, FILE *fp)
  95 {
  96    print_register(src->reg, fp);
  97    if (src->reg->num_array_elems != 0) {
  98       fprintf(fp, "[%u", src->base_offset);
  99       if (src->indirect != NULL) {
 100          fprintf(fp, " + ");
 101          print_src(src->indirect, fp);
 102       }
 103       fprintf(fp, "]");
 104    }
 105 }
 106
 107 static void
 108 print_reg_dest(nir_reg_dest *dest, FILE *fp)
 109 {
 110    print_register(dest->reg, fp);
 111    if (dest->reg->num_array_elems != 0) {
 112       fprintf(fp, "[%u", dest->base_offset);
 113       if (dest->indirect != NULL) {
 114          fprintf(fp, " + ");
 115          print_src(dest->indirect, fp);
 116       }
 117       fprintf(fp, "]");
 118    }
 119 }
 120
 121 static void
 122 print_src(nir_src *src, FILE *fp)
 123 {
 124    if (src->is_ssa)
 125       print_ssa_use(src->ssa, fp);
 126    else
 127       print_reg_src(&src->reg, fp);
 128 }
 129
 130 static void
 131 print_dest(nir_dest *dest, FILE *fp)
 132 {
 133    if (dest->is_ssa)
 134       print_ssa_def(&dest->ssa, fp);
 135    else
 136       print_reg_dest(&dest->reg, fp);
 137 }
 138
 139 static void
 140 print_alu_src(nir_alu_src *src, FILE *fp)
 141 {
 142    if (src->negate)
 143       fprintf(fp, "-");
 144    if (src->abs)
 145       fprintf(fp, "abs(");
 146
 147    print_src(&src->src, fp);
 148
 149    if (src->swizzle[0] != 0 ||
 150        src->swizzle[1] != 1 ||
 151        src->swizzle[2] != 2 ||
 152        src->swizzle[3] != 3) {
 153       fprintf(fp, ".");
 154       for (unsigned i = 0; i < 4; i++)
 155          fprintf(fp, "%c", "xyzw"[src->swizzle[i]]);
 156    }
 157
 158    if (src->abs)
 159       fprintf(fp, ")");
 160 }
 161
 162 static void
 163 print_alu_dest(nir_alu_dest *dest, FILE *fp)
 164 {
 165    /* we're going to print the saturate modifier later, after the opcode */
 166
 167    print_dest(&dest->dest, fp);
 168
 169    if (!dest->dest.is_ssa &&
 170        dest->write_mask != (1 << dest->dest.reg.reg->num_components) - 1) {
 171       fprintf(fp, ".");
 172       for (unsigned i = 0; i < 4; i++)
 173          if ((dest->write_mask >> i) & 1)
 174             fprintf(fp, "%c", "xyzw"[i]);
 175    }
 176 }
 177
 178 static void
 179 print_alu_instr(nir_alu_instr *instr, FILE *fp)
 180 {
 181    print_alu_dest(&instr->dest, fp);
 182
 183    fprintf(fp, " = %s", nir_op_infos[instr->op].name);
 184    if (instr->dest.saturate)
 185       fprintf(fp, ".sat");
 186    fprintf(fp, " ");
 187
 188    bool first = true;
 189    for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
 190       if (!first)
 191          fprintf(fp, ", ");
 192
 193       print_alu_src(&instr->src[i], fp);
 194
 195       first = false;
 196    }
 197 }
 198
 199 static void
 200 print_var_decl(nir_variable *var, print_var_state *state, FILE *fp)
 201 {
 202    fprintf(fp, "decl_var ");
 203
 204    const char *const cent = (var->data.centroid) ? "centroid " : "";
 205    const char *const samp = (var->data.sample) ? "sample " : "";
 206    const char *const inv = (var->data.invariant) ? "invariant " : "";
 207    const char *const mode[] = { "shader_in ", "shader_out ", "", "",
 208                                 "uniform ", "system " };
 209    const char *const interp[] = { "", "smooth", "flat", "noperspective" };
 210
 211    fprintf(fp, "%s%s%s%s%s ",
 212       cent, samp, inv, mode[var->data.mode], interp[var->data.interpolation]);
 213
 214    glsl_print_type(var->type, fp);
 215
 216    struct set_entry *entry =
 217       _mesa_set_search(state->syms, _mesa_hash_string(var->name), var->name);
 218
 219    char *name;
 220
 221    if (entry != NULL) {
 222       /* we have a collision with another name, append an @ + a unique index */
 223       name = ralloc_asprintf(state->syms, "%s@%u", var->name, state->index++);
 224    } else {
 225       name = var->name;
 226    }
 227
 228    fprintf(fp, " %s", name);
 229
 230    if (var->data.mode == nir_var_shader_in ||
 231        var->data.mode == nir_var_shader_out ||
 232        var->data.mode == nir_var_uniform) {
 233       fprintf(fp, " (%u)", var->data.driver_location);
 234    }
 235
 236    fprintf(fp, "\n");
 237
 238    _mesa_set_add(state->syms, _mesa_hash_string(name), name);
 239    _mesa_hash_table_insert(state->ht, var, name);
 240 }
 241
 242 static void
 243 print_var(nir_variable *var, print_var_state *state, FILE *fp)
 244 {
 245    struct hash_entry *entry = _mesa_hash_table_search(state->ht, var);
 246
 247    assert(entry != NULL);
 248
 249    fprintf(fp, "%s", (char *) entry->data);
 250 }
 251
 252 static void
 253 print_deref_var(nir_deref_var *deref, print_var_state *state, FILE *fp)
 254 {
 255    print_var(deref->var, state, fp);
 256 }
 257
 258 static void
 259 print_deref_array(nir_deref_array *deref, print_var_state *state, FILE *fp)
 260 {
 261    fprintf(fp, "[");
 262    switch (deref->deref_array_type) {
 263    case nir_deref_array_type_direct:
 264       fprintf(fp, "%u", deref->base_offset);
 265       break;
 266    case nir_deref_array_type_indirect:
 267       if (deref->base_offset != 0)
 268          fprintf(fp, "%u + ", deref->base_offset);
 269       print_src(&deref->indirect, fp);
 270       break;
 271    case nir_deref_array_type_wildcard:
 272       fprintf(fp, "*");
 273       break;
 274    }
 275    fprintf(fp, "]");
 276 }
 277
 278 static void
 279 print_deref_struct(nir_deref_struct *deref, const struct glsl_type *parent_type,
 280                    print_var_state *state, FILE *fp)
 281 {
 282    fprintf(fp, ".%s", glsl_get_struct_elem_name(parent_type, deref->index));
 283 }
 284
 285 static void
 286 print_deref(nir_deref_var *deref, print_var_state *state, FILE *fp)
 287 {
 288    nir_deref *tail = &deref->deref;
 289    nir_deref *pretail = NULL;
 290    while (tail != NULL) {
 291       switch (tail->deref_type) {
 292       case nir_deref_type_var:
 293          assert(pretail == NULL);
 294          assert(tail == &deref->deref);
 295          print_deref_var(deref, state, fp);
 296          break;
 297
 298       case nir_deref_type_array:
 299          assert(pretail != NULL);
 300          print_deref_array(nir_deref_as_array(tail), state, fp);
 301          break;
 302
 303       case nir_deref_type_struct:
 304          assert(pretail != NULL);
 305          print_deref_struct(nir_deref_as_struct(tail),
 306                             pretail->type, state, fp);
 307          break;
 308
 309       default:
 310          unreachable("Invalid deref type");
 311       }
 312
 313       pretail = tail;
 314       tail = pretail->child;
 315    }
 316 }
 317
 318 static void
 319 print_intrinsic_instr(nir_intrinsic_instr *instr, print_var_state *state,
 320                       FILE *fp)
 321 {
 322    unsigned num_srcs = nir_intrinsic_infos[instr->intrinsic].num_srcs;
 323
 324    if (nir_intrinsic_infos[instr->intrinsic].has_dest) {
 325       print_dest(&instr->dest, fp);
 326       fprintf(fp, " = ");
 327    }
 328
 329    fprintf(fp, "intrinsic %s (", nir_intrinsic_infos[instr->intrinsic].name);
 330
 331    bool first = true;
 332    for (unsigned i = 0; i < num_srcs; i++) {
 333       if (!first)
 334          fprintf(fp, ", ");
 335
 336       print_src(&instr->src[i], fp);
 337
 338       first = false;
 339    }
 340
 341    fprintf(fp, ") (");
 342
 343    unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
 344
 345    first = true;
 346    for (unsigned i = 0; i < num_vars; i++) {
 347       if (!first)
 348          fprintf(fp, ", ");
 349
 350       print_deref(instr->variables[i], state, fp);
 351
 352       first = false;
 353    }
 354
 355    fprintf(fp, ") (");
 356
 357    unsigned num_indices = nir_intrinsic_infos[instr->intrinsic].num_indices;
 358
 359    first = true;
 360    for (unsigned i = 0; i < num_indices; i++) {
 361       if (!first)
 362          fprintf(fp, ", ");
 363
 364       fprintf(fp, "%u", instr->const_index[i]);
 365
 366       first = false;
 367    }
 368
 369    fprintf(fp, ")");
 370 }
 371
 372 static void
 373 print_tex_instr(nir_tex_instr *instr, print_var_state *state, FILE *fp)
 374 {
 375    print_dest(&instr->dest, fp);
 376
 377    fprintf(fp, " = ");
 378
 379    switch (instr->op) {
 380    case nir_texop_tex:
 381       fprintf(fp, "tex ");
 382       break;
 383    case nir_texop_txb:
 384       fprintf(fp, "txb ");
 385       break;
 386    case nir_texop_txl:
 387       fprintf(fp, "txl ");
 388       break;
 389    case nir_texop_txd:
 390       fprintf(fp, "txd ");
 391       break;
 392    case nir_texop_txf:
 393       fprintf(fp, "txf ");
 394       break;
 395    case nir_texop_txf_ms:
 396       fprintf(fp, "txf_ms ");
 397       break;
 398    case nir_texop_txs:
 399       fprintf(fp, "txs ");
 400       break;
 401    case nir_texop_lod:
 402       fprintf(fp, "lod ");
 403       break;
 404    case nir_texop_tg4:
 405       fprintf(fp, "tg4 ");
 406       break;
 407    case nir_texop_query_levels:
 408       fprintf(fp, "query_levels ");
 409       break;
 410
 411    default:
 412       unreachable("Invalid texture operation");
 413       break;
 414    }
 415
 416    for (unsigned i = 0; i < instr->num_srcs; i++) {
 417       print_src(&instr->src[i], fp);
 418
 419       fprintf(fp, " ");
 420
 421       switch(instr->src_type[i]) {
 422       case nir_tex_src_coord:
 423          fprintf(fp, "(coord)");
 424          break;
 425       case nir_tex_src_projector:
 426          fprintf(fp, "(projector)");
 427          break;
 428       case nir_tex_src_comparitor:
 429          fprintf(fp, "(comparitor)");
 430          break;
 431       case nir_tex_src_offset:
 432          fprintf(fp, "(offset)");
 433          break;
 434       case nir_tex_src_bias:
 435          fprintf(fp, "(bias)");
 436          break;
 437       case nir_tex_src_lod:
 438          fprintf(fp, "(lod)");
 439          break;
 440       case nir_tex_src_ms_index:
 441          fprintf(fp, "(ms_index)");
 442          break;
 443       case nir_tex_src_ddx:
 444          fprintf(fp, "(ddx)");
 445          break;
 446       case nir_tex_src_ddy:
 447          fprintf(fp, "(ddy)");
 448          break;
 449       case nir_tex_src_sampler_offset:
 450          fprintf(fp, "(sampler_offset)");
 451          break;
 452
 453       default:
 454          unreachable("Invalid texture source type");
 455          break;
 456       }
 457
 458       fprintf(fp, ", ");
 459    }
 460
 461    bool offset_nonzero = false;
 462    for (unsigned i = 0; i < 4; i++)
 463       if (instr->const_offset[i] != 0) {
 464          offset_nonzero = true;
 465          break;
 466       }
 467
 468    if (offset_nonzero) {
 469       fprintf(fp, "[%i %i %i %i] (offset), ",
 470               instr->const_offset[0], instr->const_offset[1],
 471               instr->const_offset[2], instr->const_offset[3]);
 472    }
 473
 474    if (instr->op == nir_texop_tg4) {
 475       fprintf(fp, "%u (gather_component), ", instr->component);
 476    }
 477
 478    if (instr->sampler) {
 479       print_deref(instr->sampler, state, fp);
 480    } else {
 481       fprintf(fp, "%u", instr->sampler_index);
 482    }
 483
 484    fprintf(fp, " (sampler)");
 485 }
 486
 487 static void
 488 print_call_instr(nir_call_instr *instr, print_var_state *state, FILE *fp)
 489 {
 490    fprintf(fp, "call %s ", instr->callee->function->name);
 491
 492    for (unsigned i = 0; i < instr->num_params; i++) {
 493       if (i != 0)
 494          fprintf(fp, ", ");
 495
 496       print_deref(instr->params[i], state, fp);
 497    }
 498
 499    if (instr->return_deref != NULL) {
 500       if (instr->num_params != 0)
 501          fprintf(fp, ", ");
 502       fprintf(fp, "returning ");
 503       print_deref(instr->return_deref, state, fp);
 504    }
 505 }
 506
 507 static void
 508 print_load_const_instr(nir_load_const_instr *instr, unsigned tabs, FILE *fp)
 509 {
 510    print_ssa_def(&instr->def, fp);
 511
 512    fprintf(fp, " = load_const (");
 513
 514    bool first = true;
 515    for (unsigned i = 0; i < instr->def.num_components; i++) {
 516       if (!first)
 517          fprintf(fp, ", ");
 518
 519       /*
 520        * we don't really know the type of the constant (if it will be used as a
 521        * float or an int), so just print the raw constant in hex for fidelity
 522        * and then print the float in a comment for readability.
 523        */
 524
 525       fprintf(fp, "0x%08x /* %f */", instr->value.u[i], instr->value.f[i]);
 526
 527       first = false;
 528    }
 529 }
 530
 531 static void
 532 print_jump_instr(nir_jump_instr *instr, FILE *fp)
 533 {
 534    switch (instr->type) {
 535    case nir_jump_break:
 536       fprintf(fp, "break");
 537       break;
 538
 539    case nir_jump_continue:
 540       fprintf(fp, "continue");
 541       break;
 542
 543    case nir_jump_return:
 544       fprintf(fp, "return");
 545       break;
 546    }
 547 }
 548
 549 static void
 550 print_ssa_undef_instr(nir_ssa_undef_instr* instr, FILE *fp)
 551 {
 552    print_ssa_def(&instr->def, fp);
 553    fprintf(fp, " = undefined");
 554 }
 555
 556 static void
 557 print_phi_instr(nir_phi_instr *instr, FILE *fp)
 558 {
 559    print_dest(&instr->dest, fp);
 560    fprintf(fp, " = phi ");
 561    bool first = true;
 562    foreach_list_typed(nir_phi_src, src, node, &instr->srcs) {
 563       if (!first)
 564          fprintf(fp, ", ");
 565
 566       fprintf(fp, "block_%u: ", src->pred->index);
 567       print_src(&src->src, fp);
 568
 569       first = false;
 570    }
 571 }
 572
 573 static void
 574 print_parallel_copy_instr(nir_parallel_copy_instr *instr, FILE *fp)
 575 {
 576    bool first = true;
 577    fprintf(fp, "pcopy: ");
 578    nir_foreach_parallel_copy_entry(instr, entry) {
 579       if (!first)
 580          fprintf(fp, "; ");
 581
 582       print_dest(&entry->dest, fp);
 583       fprintf(fp, " = ");
 584       print_src(&entry->src, fp);
 585
 586       first = false;
 587    }
 588 }
 589
 590 static void
 591 print_instr(nir_instr *instr, print_var_state *state, unsigned tabs, FILE *fp)
 592 {
 593    print_tabs(tabs, fp);
 594
 595    switch (instr->type) {
 596    case nir_instr_type_alu:
 597       print_alu_instr(nir_instr_as_alu(instr), fp);
 598       break;
 599
 600    case nir_instr_type_call:
 601       print_call_instr(nir_instr_as_call(instr), state, fp);
 602       break;
 603
 604    case nir_instr_type_intrinsic:
 605       print_intrinsic_instr(nir_instr_as_intrinsic(instr), state, fp);
 606       break;
 607
 608    case nir_instr_type_tex:
 609       print_tex_instr(nir_instr_as_tex(instr), state, fp);
 610       break;
 611
 612    case nir_instr_type_load_const:
 613       print_load_const_instr(nir_instr_as_load_const(instr), tabs, fp);
 614       break;
 615
 616    case nir_instr_type_jump:
 617       print_jump_instr(nir_instr_as_jump(instr), fp);
 618       break;
 619
 620    case nir_instr_type_ssa_undef:
 621       print_ssa_undef_instr(nir_instr_as_ssa_undef(instr), fp);
 622       break;
 623
 624    case nir_instr_type_phi:
 625       print_phi_instr(nir_instr_as_phi(instr), fp);
 626       break;
 627
 628    case nir_instr_type_parallel_copy:
 629       print_parallel_copy_instr(nir_instr_as_parallel_copy(instr), fp);
 630       break;
 631
 632    default:
 633       unreachable("Invalid instruction type");
 634       break;
 635    }
 636
 637    fprintf(fp, "\n");
 638 }
 639
 640 static int
 641 compare_block_index(const void *p1, const void *p2)
 642 {
 643    const nir_block *block1 = *((const nir_block **) p1);
 644    const nir_block *block2 = *((const nir_block **) p2);
 645
 646    return (int) block1->index - (int) block2->index;
 647 }
 648
 649 static void print_cf_node(nir_cf_node *node, print_var_state *state,
 650                           unsigned tabs, FILE *fp);
 651
 652 static void
 653 print_block(nir_block *block, print_var_state *state, unsigned tabs, FILE *fp)
 654 {
 655    print_tabs(tabs, fp);
 656    fprintf(fp, "block block_%u:\n", block->index);
 657
 658    /* sort the predecessors by index so we consistently print the same thing */
 659
 660    nir_block **preds =
 661       malloc(block->predecessors->entries * sizeof(nir_block *));
 662
 663    struct set_entry *entry;
 664    unsigned i = 0;
 665    set_foreach(block->predecessors, entry) {
 666       preds[i++] = (nir_block *) entry->key;
 667    }
 668
 669    qsort(preds, block->predecessors->entries, sizeof(nir_block *),
 670          compare_block_index);
 671
 672    print_tabs(tabs, fp);
 673    fprintf(fp, "/* preds: ");
 674    for (unsigned i = 0; i < block->predecessors->entries; i++) {
 675       fprintf(fp, "block_%u ", preds[i]->index);
 676    }
 677    fprintf(fp, "*/\n");
 678
 679    free(preds);
 680
 681    nir_foreach_instr(block, instr) {
 682       print_instr(instr, state, tabs, fp);
 683    }
 684
 685    print_tabs(tabs, fp);
 686    fprintf(fp, "/* succs: ");
 687    for (unsigned i = 0; i < 2; i++)
 688       if (block->successors[i]) {
 689          fprintf(fp, "block_%u ", block->successors[i]->index);
 690       }
 691    fprintf(fp, "*/\n");
 692 }
 693
 694 static void
 695 print_if(nir_if *if_stmt, print_var_state *state, unsigned tabs, FILE *fp)
 696 {
 697    print_tabs(tabs, fp);
 698    fprintf(fp, "if ");
 699    print_src(&if_stmt->condition, fp);
 700    fprintf(fp, " {\n");
 701    foreach_list_typed(nir_cf_node, node, node, &if_stmt->then_list) {
 702       print_cf_node(node, state, tabs + 1, fp);
 703    }
 704    print_tabs(tabs, fp);
 705    fprintf(fp, "} else {\n");
 706    foreach_list_typed(nir_cf_node, node, node, &if_stmt->else_list) {
 707       print_cf_node(node, state, tabs + 1, fp);
 708    }
 709    print_tabs(tabs, fp);
 710    fprintf(fp, "}\n");
 711 }
 712
 713 static void
 714 print_loop(nir_loop *loop, print_var_state *state, unsigned tabs, FILE *fp)
 715 {
 716    print_tabs(tabs, fp);
 717    fprintf(fp, "loop {\n");
 718    foreach_list_typed(nir_cf_node, node, node, &loop->body) {
 719       print_cf_node(node, state, tabs + 1, fp);
 720    }
 721    print_tabs(tabs, fp);
 722    fprintf(fp, "}\n");
 723 }
 724
 725 static void
 726 print_cf_node(nir_cf_node *node, print_var_state *state, unsigned int tabs,
 727               FILE *fp)
 728 {
 729    switch (node->type) {
 730    case nir_cf_node_block:
 731       print_block(nir_cf_node_as_block(node), state, tabs, fp);
 732       break;
 733
 734    case nir_cf_node_if:
 735       print_if(nir_cf_node_as_if(node), state, tabs, fp);
 736       break;
 737
 738    case nir_cf_node_loop:
 739       print_loop(nir_cf_node_as_loop(node), state, tabs, fp);
 740       break;
 741
 742    default:
 743       unreachable("Invalid CFG node type");
 744    }
 745 }
 746
 747 static void
 748 print_function_impl(nir_function_impl *impl, print_var_state *state, FILE *fp)
 749 {
 750    fprintf(fp, "\nimpl %s ", impl->overload->function->name);
 751
 752    for (unsigned i = 0; i < impl->num_params; i++) {
 753       if (i != 0)
 754          fprintf(fp, ", ");
 755
 756       print_var(impl->params[i], state, fp);
 757    }
 758
 759    if (impl->return_var != NULL) {
 760       if (impl->num_params != 0)
 761          fprintf(fp, ", ");
 762       fprintf(fp, "returning ");
 763       print_var(impl->return_var, state, fp);
 764    }
 765
 766    fprintf(fp, "{\n");
 767
 768    foreach_list_typed(nir_variable, var, node, &impl->locals) {
 769       fprintf(fp, "\t");
 770       print_var_decl(var, state, fp);
 771    }
 772
 773    foreach_list_typed(nir_register, reg, node, &impl->registers) {
 774       fprintf(fp, "\t");
 775       print_register_decl(reg, fp);
 776    }
 777
 778    nir_index_blocks(impl);
 779
 780    foreach_list_typed(nir_cf_node, node, node, &impl->body) {
 781       print_cf_node(node, state, 1, fp);
 782    }
 783
 784    fprintf(fp, "\tblock block_%u:\n}\n\n", impl->end_block->index);
 785 }
 786
 787 static void
 788 print_function_overload(nir_function_overload *overload,
 789                         print_var_state *state, FILE *fp)
 790 {
 791    fprintf(fp, "decl_overload %s ", overload->function->name);
 792
 793    for (unsigned i = 0; i < overload->num_params; i++) {
 794       if (i != 0)
 795          fprintf(fp, ", ");
 796
 797       switch (overload->params[i].param_type) {
 798       case nir_parameter_in:
 799          fprintf(fp, "in ");
 800          break;
 801       case nir_parameter_out:
 802          fprintf(fp, "out ");
 803          break;
 804       case nir_parameter_inout:
 805          fprintf(fp, "inout ");
 806          break;
 807       default:
 808          unreachable("Invalid parameter type");
 809       }
 810
 811       glsl_print_type(overload->params[i].type, fp);
 812    }
 813
 814    if (overload->return_type != NULL) {
 815       if (overload->num_params != 0)
 816          fprintf(fp, ", ");
 817       fprintf(fp, "returning ");
 818       glsl_print_type(overload->return_type, fp);
 819    }
 820
 821    fprintf(fp, "\n");
 822
 823    if (overload->impl != NULL) {
 824       print_function_impl(overload->impl, state, fp);
 825       return;
 826    }
 827 }
 828
 829 static void
 830 print_function(nir_function *func, print_var_state *state, FILE *fp)
 831 {
 832    foreach_list_typed(nir_function_overload, overload, node, &func->overload_list) {
 833       print_function_overload(overload, state, fp);
 834    }
 835 }
 836
 837 static void
 838 init_print_state(print_var_state *state)
 839 {
 840    state->ht = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
 841                                        _mesa_key_pointer_equal);
 842    state->syms = _mesa_set_create(NULL, _mesa_key_string_equal);
 843    state->index = 0;
 844 }
 845
 846 static void
 847 destroy_print_state(print_var_state *state)
 848 {
 849    _mesa_hash_table_destroy(state->ht, NULL);
 850    _mesa_set_destroy(state->syms, NULL);
 851 }
 852
 853 void
 854 nir_print_shader(nir_shader *shader, FILE *fp)
 855 {
 856    print_var_state state;
 857    init_print_state(&state);
 858
 859    for (unsigned i = 0; i < shader->num_user_structures; i++) {
 860       glsl_print_struct(shader->user_structures[i], fp);
 861    }
 862
 863    struct hash_entry *entry;
 864
 865    hash_table_foreach(shader->uniforms, entry) {
 866       print_var_decl((nir_variable *) entry->data, &state, fp);
 867    }
 868
 869    hash_table_foreach(shader->inputs, entry) {
 870       print_var_decl((nir_variable *) entry->data, &state, fp);
 871    }
 872
 873    hash_table_foreach(shader->outputs, entry) {
 874       print_var_decl((nir_variable *) entry->data, &state, fp);
 875    }
 876
 877    foreach_list_typed(nir_variable, var, node, &shader->globals) {
 878       print_var_decl(var, &state, fp);
 879    }
 880
 881    foreach_list_typed(nir_variable, var, node, &shader->system_values) {
 882       print_var_decl(var, &state, fp);
 883    }
 884
 885    foreach_list_typed(nir_register, reg, node, &shader->registers) {
 886       print_register_decl(reg, fp);
 887    }
 888
 889    foreach_list_typed(nir_function, func, node, &shader->functions) {
 890       print_function(func, &state, fp);
 891    }
 892
 893    destroy_print_state(&state);
 894 }