src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include <assert.h>
  27
  28 #include "main/core.h" /* for struct gl_context */
  29 #include "main/context.h"
  30 #include "main/debug_output.h"
  31 #include "main/shaderobj.h"
  32 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  33 #include "util/ralloc.h"
  34 #include "ast.h"
  35 #include "glsl_parser_extras.h"
  36 #include "glsl_parser.h"
  37 #include "ir_optimization.h"
  38 #include "loop_analysis.h"
  39
  40 /**
  41  * Format a short human-readable description of the given GLSL version.
  42  */
  43 const char *
  44 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  45 {
  46    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  47                           version / 100, version % 100);
  48 }
  49
  50
  51 static const unsigned known_desktop_glsl_versions[] =
  52    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
  53 static const unsigned known_desktop_gl_versions[] =
  54    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45 };
  55
  56
  57 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  58                                                gl_shader_stage stage,
  59                                                void *mem_ctx)
  60    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  61      switch_state()
  62 {
  63    assert(stage < MESA_SHADER_STAGES);
  64    this->stage = stage;
  65
  66    this->scanner = NULL;
  67    this->translation_unit.make_empty();
  68    this->symbols = new(mem_ctx) glsl_symbol_table;
  69
  70    this->info_log = ralloc_strdup(mem_ctx, "");
  71    this->error = false;
  72    this->loop_nesting_ast = NULL;
  73
  74    this->uses_builtin_functions = false;
  75
  76    /* Set default language version and extensions */
  77    this->language_version = 110;
  78    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  79    this->zero_init = ctx->Const.GLSLZeroInit;
  80    this->gl_version = 20;
  81    this->es_shader = false;
  82    this->ARB_texture_rectangle_enable = true;
  83
  84    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  85    if (ctx->API == API_OPENGLES2) {
  86       this->language_version = 100;
  87       this->es_shader = true;
  88       this->ARB_texture_rectangle_enable = false;
  89    }
  90
  91    this->extensions = &ctx->Extensions;
  92
  93    this->Const.MaxLights = ctx->Const.MaxLights;
  94    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
  95    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
  96    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
  97    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
  98    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
  99    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 100    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 101    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 102    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 103    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 104    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 105
 106    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 107
 108    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 109
 110    /* 1.50 constants */
 111    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 112    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 113    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 114    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 115    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 116    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 117    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 118    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 119
 120    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 121    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 122    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 123    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 124    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 125    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 126    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 127    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 128    this->Const.MaxVertexAtomicCounterBuffers =
 129       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 130    this->Const.MaxTessControlAtomicCounterBuffers =
 131       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 132    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 133       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 134    this->Const.MaxGeometryAtomicCounterBuffers =
 135       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 136    this->Const.MaxFragmentAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 138    this->Const.MaxComputeAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 140    this->Const.MaxCombinedAtomicCounterBuffers =
 141       ctx->Const.MaxCombinedAtomicBuffers;
 142    this->Const.MaxAtomicCounterBufferSize =
 143       ctx->Const.MaxAtomicBufferSize;
 144
 145    /* ARB_enhanced_layouts constants */
 146    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 147    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 148
 149    /* Compute shader constants */
 150    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 151       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 152    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 153       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 154
 155    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 156    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 157
 158    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 159    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 160    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 161    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 162    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 163    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 164    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 165    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 166    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 167    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 168
 169    /* ARB_viewport_array */
 170    this->Const.MaxViewports = ctx->Const.MaxViewports;
 171
 172    /* tessellation shader constants */
 173    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 174    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 175    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 176    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 177    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 178    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 179    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 180    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 181    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 182    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 183    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 184    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 185
 186    /* GL 4.5 / OES_sample_variables */
 187    this->Const.MaxSamples = ctx->Const.MaxSamples;
 188
 189    this->current_function = NULL;
 190    this->toplevel_ir = NULL;
 191    this->found_return = false;
 192    this->all_invariant = false;
 193    this->user_structures = NULL;
 194    this->num_user_structures = 0;
 195    this->num_subroutines = 0;
 196    this->subroutines = NULL;
 197    this->num_subroutine_types = 0;
 198    this->subroutine_types = NULL;
 199
 200    /* supported_versions should be large enough to support the known desktop
 201     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 202     */
 203    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 204                  ARRAY_SIZE(this->supported_versions));
 205
 206    /* Populate the list of supported GLSL versions */
 207    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 208     * the OpenGL 3.2 Core context is supported, this logic will need
 209     * change.  Older versions of GLSL are no longer supported
 210     * outside the compatibility contexts of 3.x.
 211     */
 212    this->num_supported_versions = 0;
 213    if (_mesa_is_desktop_gl(ctx)) {
 214       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 215          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 216             this->supported_versions[this->num_supported_versions].ver
 217                = known_desktop_glsl_versions[i];
 218             this->supported_versions[this->num_supported_versions].gl_ver
 219                = known_desktop_gl_versions[i];
 220             this->supported_versions[this->num_supported_versions].es = false;
 221             this->num_supported_versions++;
 222          }
 223       }
 224    }
 225    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 226       this->supported_versions[this->num_supported_versions].ver = 100;
 227       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 228       this->supported_versions[this->num_supported_versions].es = true;
 229       this->num_supported_versions++;
 230    }
 231    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 232       this->supported_versions[this->num_supported_versions].ver = 300;
 233       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 234       this->supported_versions[this->num_supported_versions].es = true;
 235       this->num_supported_versions++;
 236    }
 237    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 238       this->supported_versions[this->num_supported_versions].ver = 310;
 239       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 240       this->supported_versions[this->num_supported_versions].es = true;
 241       this->num_supported_versions++;
 242    }
 243    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 244        ctx->Extensions.ARB_ES3_2_compatibility) {
 245       this->supported_versions[this->num_supported_versions].ver = 320;
 246       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 247       this->supported_versions[this->num_supported_versions].es = true;
 248       this->num_supported_versions++;
 249    }
 250
 251    /* Create a string for use in error messages to tell the user which GLSL
 252     * versions are supported.
 253     */
 254    char *supported = ralloc_strdup(this, "");
 255    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 256       unsigned ver = this->supported_versions[i].ver;
 257       const char *const prefix = (i == 0)
 258          ? ""
 259          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 260       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 261
 262       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 263                              prefix,
 264                              ver / 100, ver % 100,
 265                              suffix);
 266    }
 267
 268    this->supported_version_string = supported;
 269
 270    if (ctx->Const.ForceGLSLExtensionsWarn)
 271       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 272
 273    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 274    this->default_uniform_qualifier->flags.q.shared = 1;
 275    this->default_uniform_qualifier->flags.q.column_major = 1;
 276    this->default_uniform_qualifier->is_default_qualifier = true;
 277
 278    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 279    this->default_shader_storage_qualifier->flags.q.shared = 1;
 280    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 281    this->default_shader_storage_qualifier->is_default_qualifier = true;
 282
 283    this->fs_uses_gl_fragcoord = false;
 284    this->fs_redeclares_gl_fragcoord = false;
 285    this->fs_origin_upper_left = false;
 286    this->fs_pixel_center_integer = false;
 287    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 288
 289    this->gs_input_prim_type_specified = false;
 290    this->tcs_output_vertices_specified = false;
 291    this->gs_input_size = 0;
 292    this->in_qualifier = new(this) ast_type_qualifier();
 293    this->out_qualifier = new(this) ast_type_qualifier();
 294    this->fs_early_fragment_tests = false;
 295    memset(this->atomic_counter_offsets, 0,
 296           sizeof(this->atomic_counter_offsets));
 297    this->allow_extension_directive_midshader =
 298       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 299 }
 300
 301 /**
 302  * Determine whether the current GLSL version is sufficiently high to support
 303  * a certain feature, and generate an error message if it isn't.
 304  *
 305  * \param required_glsl_version and \c required_glsl_es_version are
 306  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 307  *
 308  * \param locp is the parser location where the error should be reported.
 309  *
 310  * \param fmt (and additional arguments) constitute a printf-style error
 311  * message to report if the version check fails.  Information about the
 312  * current and required GLSL versions will be appended.  So, for example, if
 313  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 314  * "foo unsupported") is called, the error message will be "foo unsupported in
 315  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 316  */
 317 bool
 318 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 319                                       unsigned required_glsl_es_version,
 320                                       YYLTYPE *locp, const char *fmt, ...)
 321 {
 322    if (this->is_version(required_glsl_version, required_glsl_es_version))
 323       return true;
 324
 325    va_list args;
 326    va_start(args, fmt);
 327    char *problem = ralloc_vasprintf(this, fmt, args);
 328    va_end(args);
 329    const char *glsl_version_string
 330       = glsl_compute_version_string(this, false, required_glsl_version);
 331    const char *glsl_es_version_string
 332       = glsl_compute_version_string(this, true, required_glsl_es_version);
 333    const char *requirement_string = "";
 334    if (required_glsl_version && required_glsl_es_version) {
 335       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 336                                            glsl_version_string,
 337                                            glsl_es_version_string);
 338    } else if (required_glsl_version) {
 339       requirement_string = ralloc_asprintf(this, " (%s required)",
 340                                            glsl_version_string);
 341    } else if (required_glsl_es_version) {
 342       requirement_string = ralloc_asprintf(this, " (%s required)",
 343                                            glsl_es_version_string);
 344    }
 345    _mesa_glsl_error(locp, this, "%s in %s%s",
 346                     problem, this->get_version_string(),
 347                     requirement_string);
 348
 349    return false;
 350 }
 351
 352 /**
 353  * Process a GLSL #version directive.
 354  *
 355  * \param version is the integer that follows the #version token.
 356  *
 357  * \param ident is a string identifier that follows the integer, if any is
 358  * present.  Otherwise NULL.
 359  */
 360 void
 361 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 362                                                   const char *ident)
 363 {
 364    bool es_token_present = false;
 365    if (ident) {
 366       if (strcmp(ident, "es") == 0) {
 367          es_token_present = true;
 368       } else if (version >= 150) {
 369          if (strcmp(ident, "core") == 0) {
 370             /* Accept the token.  There's no need to record that this is
 371              * a core profile shader since that's the only profile we support.
 372              */
 373          } else if (strcmp(ident, "compatibility") == 0) {
 374             _mesa_glsl_error(locp, this,
 375                              "the compatibility profile is not supported");
 376          } else {
 377             _mesa_glsl_error(locp, this,
 378                              "\"%s\" is not a valid shading language profile; "
 379                              "if present, it must be \"core\"", ident);
 380          }
 381       } else {
 382          _mesa_glsl_error(locp, this,
 383                           "illegal text following version number");
 384       }
 385    }
 386
 387    this->es_shader = es_token_present;
 388    if (version == 100) {
 389       if (es_token_present) {
 390          _mesa_glsl_error(locp, this,
 391                           "GLSL 1.00 ES should be selected using "
 392                           "`#version 100'");
 393       } else {
 394          this->es_shader = true;
 395       }
 396    }
 397
 398    if (this->es_shader) {
 399       this->ARB_texture_rectangle_enable = false;
 400    }
 401
 402    if (this->forced_language_version)
 403       this->language_version = this->forced_language_version;
 404    else
 405       this->language_version = version;
 406
 407    bool supported = false;
 408    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 409       if (this->supported_versions[i].ver == this->language_version
 410           && this->supported_versions[i].es == this->es_shader) {
 411          this->gl_version = this->supported_versions[i].gl_ver;
 412          supported = true;
 413          break;
 414       }
 415    }
 416
 417    if (!supported) {
 418       _mesa_glsl_error(locp, this, "%s is not supported. "
 419                        "Supported versions are: %s",
 420                        this->get_version_string(),
 421                        this->supported_version_string);
 422
 423       /* On exit, the language_version must be set to a valid value.
 424        * Later calls to _mesa_glsl_initialize_types will misbehave if
 425        * the version is invalid.
 426        */
 427       switch (this->ctx->API) {
 428       case API_OPENGL_COMPAT:
 429       case API_OPENGL_CORE:
 430          this->language_version = this->ctx->Const.GLSLVersion;
 431          break;
 432
 433       case API_OPENGLES:
 434          assert(!"Should not get here.");
 435          /* FALLTHROUGH */
 436
 437       case API_OPENGLES2:
 438          this->language_version = 100;
 439          break;
 440       }
 441    }
 442 }
 443
 444
 445 /* This helper function will append the given message to the shader's
 446    info log and report it via GL_ARB_debug_output. Per that extension,
 447    'type' is one of the enum values classifying the message, and
 448    'id' is the implementation-defined ID of the given message. */
 449 static void
 450 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 451                GLenum type, const char *fmt, va_list ap)
 452 {
 453    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 454    GLuint msg_id = 0;
 455
 456    assert(state->info_log != NULL);
 457
 458    /* Get the offset that the new message will be written to. */
 459    int msg_offset = strlen(state->info_log);
 460
 461    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 462                                             locp->source,
 463                                             locp->first_line,
 464                                             locp->first_column,
 465                                             error ? "error" : "warning");
 466    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 467
 468    const char *const msg = &state->info_log[msg_offset];
 469    struct gl_context *ctx = state->ctx;
 470
 471    /* Report the error via GL_ARB_debug_output. */
 472    _mesa_shader_debug(ctx, type, &msg_id, msg);
 473
 474    ralloc_strcat(&state->info_log, "\n");
 475 }
 476
 477 void
 478 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 479                  const char *fmt, ...)
 480 {
 481    va_list ap;
 482
 483    state->error = true;
 484
 485    va_start(ap, fmt);
 486    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 487    va_end(ap);
 488 }
 489
 490
 491 void
 492 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 493                    const char *fmt, ...)
 494 {
 495    va_list ap;
 496
 497    va_start(ap, fmt);
 498    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 499    va_end(ap);
 500 }
 501
 502
 503 /**
 504  * Enum representing the possible behaviors that can be specified in
 505  * an #extension directive.
 506  */
 507 enum ext_behavior {
 508    extension_disable,
 509    extension_enable,
 510    extension_require,
 511    extension_warn
 512 };
 513
 514 /**
 515  * Element type for _mesa_glsl_supported_extensions
 516  */
 517 struct _mesa_glsl_extension {
 518    /**
 519     * Name of the extension when referred to in a GLSL extension
 520     * statement
 521     */
 522    const char *name;
 523
 524    /**
 525     * Predicate that checks whether the relevant extension is available for
 526     * this context.
 527     */
 528    bool (*available_pred)(const struct gl_context *,
 529                           gl_api api, uint8_t version);
 530
 531    /**
 532     * Flag in the _mesa_glsl_parse_state struct that should be set
 533     * when this extension is enabled.
 534     *
 535     * See note in _mesa_glsl_extension::supported_flag about "pointer
 536     * to member" types.
 537     */
 538    bool _mesa_glsl_parse_state::* enable_flag;
 539
 540    /**
 541     * Flag in the _mesa_glsl_parse_state struct that should be set
 542     * when the shader requests "warn" behavior for this extension.
 543     *
 544     * See note in _mesa_glsl_extension::supported_flag about "pointer
 545     * to member" types.
 546     */
 547    bool _mesa_glsl_parse_state::* warn_flag;
 548
 549
 550    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 551                               gl_api api, uint8_t gl_version) const;
 552    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 553 };
 554
 555 /** Checks if the context supports a user-facing extension */
 556 #define EXT(name_str, driver_cap, ...) \
 557 static MAYBE_UNUSED bool \
 558 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 559 { \
 560    return ctx->Extensions.driver_cap && (version >= \
 561           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 562 }
 563 #include "main/extensions_table.h"
 564 #undef EXT
 565
 566 #define EXT(NAME)                                           \
 567    { "GL_" #NAME, has_##NAME,                         \
 568          &_mesa_glsl_parse_state::NAME##_enable,            \
 569          &_mesa_glsl_parse_state::NAME##_warn }
 570
 571 /**
 572  * Table of extensions that can be enabled/disabled within a shader,
 573  * and the conditions under which they are supported.
 574  */
 575 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 576    /* ARB extensions go here, sorted alphabetically.
 577     */
 578    EXT(ARB_ES3_1_compatibility),
 579    EXT(ARB_ES3_2_compatibility),
 580    EXT(ARB_arrays_of_arrays),
 581    EXT(ARB_compute_shader),
 582    EXT(ARB_conservative_depth),
 583    EXT(ARB_cull_distance),
 584    EXT(ARB_derivative_control),
 585    EXT(ARB_draw_buffers),
 586    EXT(ARB_draw_instanced),
 587    EXT(ARB_enhanced_layouts),
 588    EXT(ARB_explicit_attrib_location),
 589    EXT(ARB_explicit_uniform_location),
 590    EXT(ARB_fragment_coord_conventions),
 591    EXT(ARB_fragment_layer_viewport),
 592    EXT(ARB_gpu_shader5),
 593    EXT(ARB_gpu_shader_fp64),
 594    EXT(ARB_sample_shading),
 595    EXT(ARB_separate_shader_objects),
 596    EXT(ARB_shader_atomic_counter_ops),
 597    EXT(ARB_shader_atomic_counters),
 598    EXT(ARB_shader_bit_encoding),
 599    EXT(ARB_shader_clock),
 600    EXT(ARB_shader_draw_parameters),
 601    EXT(ARB_shader_group_vote),
 602    EXT(ARB_shader_image_load_store),
 603    EXT(ARB_shader_image_size),
 604    EXT(ARB_shader_precision),
 605    EXT(ARB_shader_stencil_export),
 606    EXT(ARB_shader_storage_buffer_object),
 607    EXT(ARB_shader_subroutine),
 608    EXT(ARB_shader_texture_image_samples),
 609    EXT(ARB_shader_texture_lod),
 610    EXT(ARB_shading_language_420pack),
 611    EXT(ARB_shading_language_packing),
 612    EXT(ARB_tessellation_shader),
 613    EXT(ARB_texture_cube_map_array),
 614    EXT(ARB_texture_gather),
 615    EXT(ARB_texture_multisample),
 616    EXT(ARB_texture_query_levels),
 617    EXT(ARB_texture_query_lod),
 618    EXT(ARB_texture_rectangle),
 619    EXT(ARB_uniform_buffer_object),
 620    EXT(ARB_vertex_attrib_64bit),
 621    EXT(ARB_viewport_array),
 622
 623    /* KHR extensions go here, sorted alphabetically.
 624     */
 625    EXT(KHR_blend_equation_advanced),
 626
 627    /* OES extensions go here, sorted alphabetically.
 628     */
 629    EXT(OES_EGL_image_external),
 630    EXT(OES_geometry_point_size),
 631    EXT(OES_geometry_shader),
 632    EXT(OES_gpu_shader5),
 633    EXT(OES_sample_variables),
 634    EXT(OES_shader_image_atomic),
 635    EXT(OES_shader_io_blocks),
 636    EXT(OES_shader_multisample_interpolation),
 637    EXT(OES_standard_derivatives),
 638    EXT(OES_tessellation_point_size),
 639    EXT(OES_tessellation_shader),
 640    EXT(OES_texture_3D),
 641    EXT(OES_texture_buffer),
 642    EXT(OES_texture_storage_multisample_2d_array),
 643
 644    /* All other extensions go here, sorted alphabetically.
 645     */
 646    EXT(AMD_conservative_depth),
 647    EXT(AMD_shader_stencil_export),
 648    EXT(AMD_shader_trinary_minmax),
 649    EXT(AMD_vertex_shader_layer),
 650    EXT(AMD_vertex_shader_viewport_index),
 651    EXT(EXT_blend_func_extended),
 652    EXT(EXT_draw_buffers),
 653    EXT(EXT_clip_cull_distance),
 654    EXT(EXT_gpu_shader5),
 655    EXT(EXT_separate_shader_objects),
 656    EXT(EXT_shader_framebuffer_fetch),
 657    EXT(EXT_shader_integer_mix),
 658    EXT(EXT_shader_io_blocks),
 659    EXT(EXT_shader_samples_identical),
 660    EXT(EXT_tessellation_point_size),
 661    EXT(EXT_tessellation_shader),
 662    EXT(EXT_texture_array),
 663    EXT(EXT_texture_buffer),
 664    EXT(MESA_shader_integer_functions),
 665 };
 666
 667 #undef EXT
 668
 669
 670 /**
 671  * Determine whether a given extension is compatible with the target,
 672  * API, and extension information in the current parser state.
 673  */
 674 bool _mesa_glsl_extension::compatible_with_state(
 675       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 676 {
 677    return this->available_pred(state->ctx, api, gl_version);
 678 }
 679
 680 /**
 681  * Set the appropriate flags in the parser state to establish the
 682  * given behavior for this extension.
 683  */
 684 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 685                                      ext_behavior behavior) const
 686 {
 687    /* Note: the ->* operator indexes into state by the
 688     * offsets this->enable_flag and this->warn_flag.  See
 689     * _mesa_glsl_extension::supported_flag for more info.
 690     */
 691    state->*(this->enable_flag) = (behavior != extension_disable);
 692    state->*(this->warn_flag)   = (behavior == extension_warn);
 693 }
 694
 695 /**
 696  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 697  * the name is not found, return NULL.
 698  */
 699 static const _mesa_glsl_extension *find_extension(const char *name)
 700 {
 701    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 702       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 703          return &_mesa_glsl_supported_extensions[i];
 704       }
 705    }
 706    return NULL;
 707 }
 708
 709
 710 bool
 711 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 712                              const char *behavior_string, YYLTYPE *behavior_locp,
 713                              _mesa_glsl_parse_state *state)
 714 {
 715    uint8_t gl_version = state->ctx->Extensions.Version;
 716    gl_api api = state->ctx->API;
 717    ext_behavior behavior;
 718    if (strcmp(behavior_string, "warn") == 0) {
 719       behavior = extension_warn;
 720    } else if (strcmp(behavior_string, "require") == 0) {
 721       behavior = extension_require;
 722    } else if (strcmp(behavior_string, "enable") == 0) {
 723       behavior = extension_enable;
 724    } else if (strcmp(behavior_string, "disable") == 0) {
 725       behavior = extension_disable;
 726    } else {
 727       _mesa_glsl_error(behavior_locp, state,
 728                        "unknown extension behavior `%s'",
 729                        behavior_string);
 730       return false;
 731    }
 732
 733    /* If we're in a desktop context but with an ES shader, use an ES API enum
 734     * to verify extension availability.
 735     */
 736    if (state->es_shader && api != API_OPENGLES2)
 737       api = API_OPENGLES2;
 738    /* Use the language-version derived GL version to extension checks, unless
 739     * we're using meta, which sets the version to the max.
 740     */
 741    if (gl_version != 0xff)
 742       gl_version = state->gl_version;
 743
 744    if (strcmp(name, "all") == 0) {
 745       if ((behavior == extension_enable) || (behavior == extension_require)) {
 746          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 747                           (behavior == extension_enable)
 748                           ? "enable" : "require");
 749          return false;
 750       } else {
 751          for (unsigned i = 0;
 752               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 753             const _mesa_glsl_extension *extension
 754                = &_mesa_glsl_supported_extensions[i];
 755             if (extension->compatible_with_state(state, api, gl_version)) {
 756                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 757             }
 758          }
 759       }
 760    } else {
 761       const _mesa_glsl_extension *extension = find_extension(name);
 762       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 763          extension->set_flags(state, behavior);
 764       } else {
 765          static const char fmt[] = "extension `%s' unsupported in %s shader";
 766
 767          if (behavior == extension_require) {
 768             _mesa_glsl_error(name_locp, state, fmt,
 769                              name, _mesa_shader_stage_to_string(state->stage));
 770             return false;
 771          } else {
 772             _mesa_glsl_warning(name_locp, state, fmt,
 773                                name, _mesa_shader_stage_to_string(state->stage));
 774          }
 775       }
 776    }
 777
 778    return true;
 779 }
 780
 781
 782 /**
 783  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 784  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 785  * (process_array_constructor, et al) sufficient information to do type
 786  * checking.
 787  *
 788  * Operates on assignments involving an aggregate initializer. E.g.,
 789  *
 790  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 791  *
 792  * or more ridiculously,
 793  *
 794  * struct S {
 795  *     vec4 v[2];
 796  * };
 797  *
 798  * struct {
 799  *     S a[2], b;
 800  *     int c;
 801  * } aggregate = {
 802  *     {
 803  *         {
 804  *             {
 805  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 806  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 807  *             } // a[0].v
 808  *         }, // a[0]
 809  *         {
 810  *             {
 811  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 812  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 813  *             } // a[1].v
 814  *         } // a[1]
 815  *     }, // a
 816  *     {
 817  *         {
 818  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 819  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 820  *         } // b.v
 821  *     }, // b
 822  *     4 // c
 823  * };
 824  *
 825  * This pass is necessary because the right-hand side of <type> e = { ... }
 826  * doesn't contain sufficient information to determine if the types match.
 827  */
 828 void
 829 _mesa_ast_set_aggregate_type(const glsl_type *type,
 830                              ast_expression *expr)
 831 {
 832    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 833    ai->constructor_type = type;
 834
 835    /* If the aggregate is an array, recursively set its elements' types. */
 836    if (type->is_array()) {
 837       /* Each array element has the type type->fields.array.
 838        *
 839        * E.g., if <type> if struct S[2] we want to set each element's type to
 840        * struct S.
 841        */
 842       for (exec_node *expr_node = ai->expressions.get_head_raw();
 843            !expr_node->is_tail_sentinel();
 844            expr_node = expr_node->next) {
 845          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 846                                                link);
 847
 848          if (expr->oper == ast_aggregate)
 849             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 850       }
 851
 852    /* If the aggregate is a struct, recursively set its fields' types. */
 853    } else if (type->is_record()) {
 854       exec_node *expr_node = ai->expressions.get_head_raw();
 855
 856       /* Iterate through the struct's fields. */
 857       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 858            i++, expr_node = expr_node->next) {
 859          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 860                                                link);
 861
 862          if (expr->oper == ast_aggregate) {
 863             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 864          }
 865       }
 866    /* If the aggregate is a matrix, set its columns' types. */
 867    } else if (type->is_matrix()) {
 868       for (exec_node *expr_node = ai->expressions.get_head_raw();
 869            !expr_node->is_tail_sentinel();
 870            expr_node = expr_node->next) {
 871          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 872                                                link);
 873
 874          if (expr->oper == ast_aggregate)
 875             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 876       }
 877    }
 878 }
 879
 880 void
 881 _mesa_ast_process_interface_block(YYLTYPE *locp,
 882                                   _mesa_glsl_parse_state *state,
 883                                   ast_interface_block *const block,
 884                                   const struct ast_type_qualifier &q)
 885 {
 886    if (q.flags.q.buffer) {
 887       if (!state->has_shader_storage_buffer_objects()) {
 888          _mesa_glsl_error(locp, state,
 889                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 890                           "required for defining shader storage blocks");
 891       } else if (state->ARB_shader_storage_buffer_object_warn) {
 892          _mesa_glsl_warning(locp, state,
 893                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 894                             "required for defining shader storage blocks");
 895       }
 896    } else if (q.flags.q.uniform) {
 897       if (!state->has_uniform_buffer_objects()) {
 898          _mesa_glsl_error(locp, state,
 899                           "#version 140 / GL_ARB_uniform_buffer_object "
 900                           "required for defining uniform blocks");
 901       } else if (state->ARB_uniform_buffer_object_warn) {
 902          _mesa_glsl_warning(locp, state,
 903                             "#version 140 / GL_ARB_uniform_buffer_object "
 904                             "required for defining uniform blocks");
 905       }
 906    } else {
 907       if (!state->has_shader_io_blocks()) {
 908          if (state->es_shader) {
 909             _mesa_glsl_error(locp, state,
 910                              "GL_OES_shader_io_blocks or #version 320 "
 911                              "required for using interface blocks");
 912          } else {
 913             _mesa_glsl_error(locp, state,
 914                              "#version 150 required for using "
 915                              "interface blocks");
 916          }
 917       }
 918    }
 919
 920    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 921     * "It is illegal to have an input block in a vertex shader
 922     *  or an output block in a fragment shader"
 923     */
 924    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 925       _mesa_glsl_error(locp, state,
 926                        "`in' interface block is not allowed for "
 927                        "a vertex shader");
 928    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 929       _mesa_glsl_error(locp, state,
 930                        "`out' interface block is not allowed for "
 931                        "a fragment shader");
 932    }
 933
 934    /* Since block arrays require names, and both features are added in
 935     * the same language versions, we don't have to explicitly
 936     * version-check both things.
 937     */
 938    if (block->instance_name != NULL) {
 939       state->check_version(150, 300, locp, "interface blocks with "
 940                            "an instance name are not allowed");
 941    }
 942
 943    uint64_t interface_type_mask;
 944    struct ast_type_qualifier temp_type_qualifier;
 945
 946    /* Get a bitmask containing only the in/out/uniform/buffer
 947     * flags, allowing us to ignore other irrelevant flags like
 948     * interpolation qualifiers.
 949     */
 950    temp_type_qualifier.flags.i = 0;
 951    temp_type_qualifier.flags.q.uniform = true;
 952    temp_type_qualifier.flags.q.in = true;
 953    temp_type_qualifier.flags.q.out = true;
 954    temp_type_qualifier.flags.q.buffer = true;
 955    interface_type_mask = temp_type_qualifier.flags.i;
 956
 957    /* Get the block's interface qualifier.  The interface_qualifier
 958     * production rule guarantees that only one bit will be set (and
 959     * it will be in/out/uniform).
 960     */
 961    uint64_t block_interface_qualifier = q.flags.i;
 962
 963    block->layout.flags.i |= block_interface_qualifier;
 964
 965    if (state->stage == MESA_SHADER_GEOMETRY &&
 966        state->has_explicit_attrib_stream() &&
 967        block->layout.flags.q.out) {
 968       /* Assign global layout's stream value. */
 969       block->layout.flags.q.stream = 1;
 970       block->layout.flags.q.explicit_stream = 0;
 971       block->layout.stream = state->out_qualifier->stream;
 972    }
 973
 974    if (state->has_enhanced_layouts() && block->layout.flags.q.out) {
 975       /* Assign global layout's xfb_buffer value. */
 976       block->layout.flags.q.xfb_buffer = 1;
 977       block->layout.flags.q.explicit_xfb_buffer = 0;
 978       block->layout.xfb_buffer = state->out_qualifier->xfb_buffer;
 979    }
 980
 981    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
 982       ast_type_qualifier& qualifier = member->type->qualifier;
 983       if ((qualifier.flags.i & interface_type_mask) == 0) {
 984          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 985           * "If no optional qualifier is used in a member declaration, the
 986           *  qualifier of the variable is just in, out, or uniform as declared
 987           *  by interface-qualifier."
 988           */
 989          qualifier.flags.i |= block_interface_qualifier;
 990       } else if ((qualifier.flags.i & interface_type_mask) !=
 991                  block_interface_qualifier) {
 992          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 993           * "If optional qualifiers are used, they can include interpolation
 994           *  and storage qualifiers and they must declare an input, output,
 995           *  or uniform variable consistent with the interface qualifier of
 996           *  the block."
 997           */
 998          _mesa_glsl_error(locp, state,
 999                           "uniform/in/out qualifier on "
1000                           "interface block member does not match "
1001                           "the interface block");
1002       }
1003
1004       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1005          _mesa_glsl_error(locp, state,
1006                           "invariant qualifiers can be used only "
1007                           "in interface block members for shader "
1008                           "inputs or outputs");
1009    }
1010 }
1011
1012 void
1013 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1014 {
1015    if (q->flags.q.subroutine)
1016       printf("subroutine ");
1017
1018    if (q->flags.q.subroutine_def) {
1019       printf("subroutine (");
1020       q->subroutine_list->print();
1021       printf(")");
1022    }
1023
1024    if (q->flags.q.constant)
1025       printf("const ");
1026
1027    if (q->flags.q.invariant)
1028       printf("invariant ");
1029
1030    if (q->flags.q.attribute)
1031       printf("attribute ");
1032
1033    if (q->flags.q.varying)
1034       printf("varying ");
1035
1036    if (q->flags.q.in && q->flags.q.out)
1037       printf("inout ");
1038    else {
1039       if (q->flags.q.in)
1040          printf("in ");
1041
1042       if (q->flags.q.out)
1043          printf("out ");
1044    }
1045
1046    if (q->flags.q.centroid)
1047       printf("centroid ");
1048    if (q->flags.q.sample)
1049       printf("sample ");
1050    if (q->flags.q.patch)
1051       printf("patch ");
1052    if (q->flags.q.uniform)
1053       printf("uniform ");
1054    if (q->flags.q.buffer)
1055       printf("buffer ");
1056    if (q->flags.q.smooth)
1057       printf("smooth ");
1058    if (q->flags.q.flat)
1059       printf("flat ");
1060    if (q->flags.q.noperspective)
1061       printf("noperspective ");
1062 }
1063
1064
1065 void
1066 ast_node::print(void) const
1067 {
1068    printf("unhandled node ");
1069 }
1070
1071
1072 ast_node::ast_node(void)
1073 {
1074    this->location.source = 0;
1075    this->location.first_line = 0;
1076    this->location.first_column = 0;
1077    this->location.last_line = 0;
1078    this->location.last_column = 0;
1079 }
1080
1081
1082 static void
1083 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1084 {
1085    if (array_specifier)
1086       array_specifier->print();
1087 }
1088
1089
1090 void
1091 ast_compound_statement::print(void) const
1092 {
1093    printf("{\n");
1094
1095    foreach_list_typed(ast_node, ast, link, &this->statements) {
1096       ast->print();
1097    }
1098
1099    printf("}\n");
1100 }
1101
1102
1103 ast_compound_statement::ast_compound_statement(int new_scope,
1104                                                ast_node *statements)
1105 {
1106    this->new_scope = new_scope;
1107
1108    if (statements != NULL) {
1109       this->statements.push_degenerate_list_at_head(&statements->link);
1110    }
1111 }
1112
1113
1114 void
1115 ast_expression::print(void) const
1116 {
1117    switch (oper) {
1118    case ast_assign:
1119    case ast_mul_assign:
1120    case ast_div_assign:
1121    case ast_mod_assign:
1122    case ast_add_assign:
1123    case ast_sub_assign:
1124    case ast_ls_assign:
1125    case ast_rs_assign:
1126    case ast_and_assign:
1127    case ast_xor_assign:
1128    case ast_or_assign:
1129       subexpressions[0]->print();
1130       printf("%s ", operator_string(oper));
1131       subexpressions[1]->print();
1132       break;
1133
1134    case ast_field_selection:
1135       subexpressions[0]->print();
1136       printf(". %s ", primary_expression.identifier);
1137       break;
1138
1139    case ast_plus:
1140    case ast_neg:
1141    case ast_bit_not:
1142    case ast_logic_not:
1143    case ast_pre_inc:
1144    case ast_pre_dec:
1145       printf("%s ", operator_string(oper));
1146       subexpressions[0]->print();
1147       break;
1148
1149    case ast_post_inc:
1150    case ast_post_dec:
1151       subexpressions[0]->print();
1152       printf("%s ", operator_string(oper));
1153       break;
1154
1155    case ast_conditional:
1156       subexpressions[0]->print();
1157       printf("? ");
1158       subexpressions[1]->print();
1159       printf(": ");
1160       subexpressions[2]->print();
1161       break;
1162
1163    case ast_array_index:
1164       subexpressions[0]->print();
1165       printf("[ ");
1166       subexpressions[1]->print();
1167       printf("] ");
1168       break;
1169
1170    case ast_function_call: {
1171       subexpressions[0]->print();
1172       printf("( ");
1173
1174       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1175          if (&ast->link != this->expressions.get_head())
1176             printf(", ");
1177
1178          ast->print();
1179       }
1180
1181       printf(") ");
1182       break;
1183    }
1184
1185    case ast_identifier:
1186       printf("%s ", primary_expression.identifier);
1187       break;
1188
1189    case ast_int_constant:
1190       printf("%d ", primary_expression.int_constant);
1191       break;
1192
1193    case ast_uint_constant:
1194       printf("%u ", primary_expression.uint_constant);
1195       break;
1196
1197    case ast_float_constant:
1198       printf("%f ", primary_expression.float_constant);
1199       break;
1200
1201    case ast_double_constant:
1202       printf("%f ", primary_expression.double_constant);
1203       break;
1204
1205    case ast_bool_constant:
1206       printf("%s ",
1207              primary_expression.bool_constant
1208              ? "true" : "false");
1209       break;
1210
1211    case ast_sequence: {
1212       printf("( ");
1213       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1214          if (&ast->link != this->expressions.get_head())
1215             printf(", ");
1216
1217          ast->print();
1218       }
1219       printf(") ");
1220       break;
1221    }
1222
1223    case ast_aggregate: {
1224       printf("{ ");
1225       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1226          if (&ast->link != this->expressions.get_head())
1227             printf(", ");
1228
1229          ast->print();
1230       }
1231       printf("} ");
1232       break;
1233    }
1234
1235    default:
1236       assert(0);
1237       break;
1238    }
1239 }
1240
1241 ast_expression::ast_expression(int oper,
1242                                ast_expression *ex0,
1243                                ast_expression *ex1,
1244                                ast_expression *ex2) :
1245    primary_expression()
1246 {
1247    this->oper = ast_operators(oper);
1248    this->subexpressions[0] = ex0;
1249    this->subexpressions[1] = ex1;
1250    this->subexpressions[2] = ex2;
1251    this->non_lvalue_description = NULL;
1252    this->is_lhs = false;
1253 }
1254
1255
1256 void
1257 ast_expression_statement::print(void) const
1258 {
1259    if (expression)
1260       expression->print();
1261
1262    printf("; ");
1263 }
1264
1265
1266 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1267    expression(ex)
1268 {
1269    /* empty */
1270 }
1271
1272
1273 void
1274 ast_function::print(void) const
1275 {
1276    return_type->print();
1277    printf(" %s (", identifier);
1278
1279    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1280       ast->print();
1281    }
1282
1283    printf(")");
1284 }
1285
1286
1287 ast_function::ast_function(void)
1288    : return_type(NULL), identifier(NULL), is_definition(false),
1289      signature(NULL)
1290 {
1291    /* empty */
1292 }
1293
1294
1295 void
1296 ast_fully_specified_type::print(void) const
1297 {
1298    _mesa_ast_type_qualifier_print(& qualifier);
1299    specifier->print();
1300 }
1301
1302
1303 void
1304 ast_parameter_declarator::print(void) const
1305 {
1306    type->print();
1307    if (identifier)
1308       printf("%s ", identifier);
1309    ast_opt_array_dimensions_print(array_specifier);
1310 }
1311
1312
1313 void
1314 ast_function_definition::print(void) const
1315 {
1316    prototype->print();
1317    body->print();
1318 }
1319
1320
1321 void
1322 ast_declaration::print(void) const
1323 {
1324    printf("%s ", identifier);
1325    ast_opt_array_dimensions_print(array_specifier);
1326
1327    if (initializer) {
1328       printf("= ");
1329       initializer->print();
1330    }
1331 }
1332
1333
1334 ast_declaration::ast_declaration(const char *identifier,
1335                                  ast_array_specifier *array_specifier,
1336                                  ast_expression *initializer)
1337 {
1338    this->identifier = identifier;
1339    this->array_specifier = array_specifier;
1340    this->initializer = initializer;
1341 }
1342
1343
1344 void
1345 ast_declarator_list::print(void) const
1346 {
1347    assert(type || invariant);
1348
1349    if (type)
1350       type->print();
1351    else if (invariant)
1352       printf("invariant ");
1353    else
1354       printf("precise ");
1355
1356    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1357       if (&ast->link != this->declarations.get_head())
1358          printf(", ");
1359
1360       ast->print();
1361    }
1362
1363    printf("; ");
1364 }
1365
1366
1367 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1368 {
1369    this->type = type;
1370    this->invariant = false;
1371    this->precise = false;
1372 }
1373
1374 void
1375 ast_jump_statement::print(void) const
1376 {
1377    switch (mode) {
1378    case ast_continue:
1379       printf("continue; ");
1380       break;
1381    case ast_break:
1382       printf("break; ");
1383       break;
1384    case ast_return:
1385       printf("return ");
1386       if (opt_return_value)
1387          opt_return_value->print();
1388
1389       printf("; ");
1390       break;
1391    case ast_discard:
1392       printf("discard; ");
1393       break;
1394    }
1395 }
1396
1397
1398 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1399    : opt_return_value(NULL)
1400 {
1401    this->mode = ast_jump_modes(mode);
1402
1403    if (mode == ast_return)
1404       opt_return_value = return_value;
1405 }
1406
1407
1408 void
1409 ast_selection_statement::print(void) const
1410 {
1411    printf("if ( ");
1412    condition->print();
1413    printf(") ");
1414
1415    then_statement->print();
1416
1417    if (else_statement) {
1418       printf("else ");
1419       else_statement->print();
1420    }
1421 }
1422
1423
1424 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1425                                                  ast_node *then_statement,
1426                                                  ast_node *else_statement)
1427 {
1428    this->condition = condition;
1429    this->then_statement = then_statement;
1430    this->else_statement = else_statement;
1431 }
1432
1433
1434 void
1435 ast_switch_statement::print(void) const
1436 {
1437    printf("switch ( ");
1438    test_expression->print();
1439    printf(") ");
1440
1441    body->print();
1442 }
1443
1444
1445 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1446                                            ast_node *body)
1447 {
1448    this->test_expression = test_expression;
1449    this->body = body;
1450 }
1451
1452
1453 void
1454 ast_switch_body::print(void) const
1455 {
1456    printf("{\n");
1457    if (stmts != NULL) {
1458       stmts->print();
1459    }
1460    printf("}\n");
1461 }
1462
1463
1464 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1465 {
1466    this->stmts = stmts;
1467 }
1468
1469
1470 void ast_case_label::print(void) const
1471 {
1472    if (test_value != NULL) {
1473       printf("case ");
1474       test_value->print();
1475       printf(": ");
1476    } else {
1477       printf("default: ");
1478    }
1479 }
1480
1481
1482 ast_case_label::ast_case_label(ast_expression *test_value)
1483 {
1484    this->test_value = test_value;
1485 }
1486
1487
1488 void ast_case_label_list::print(void) const
1489 {
1490    foreach_list_typed(ast_node, ast, link, & this->labels) {
1491       ast->print();
1492    }
1493    printf("\n");
1494 }
1495
1496
1497 ast_case_label_list::ast_case_label_list(void)
1498 {
1499 }
1500
1501
1502 void ast_case_statement::print(void) const
1503 {
1504    labels->print();
1505    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1506       ast->print();
1507       printf("\n");
1508    }
1509 }
1510
1511
1512 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1513 {
1514    this->labels = labels;
1515 }
1516
1517
1518 void ast_case_statement_list::print(void) const
1519 {
1520    foreach_list_typed(ast_node, ast, link, & this->cases) {
1521       ast->print();
1522    }
1523 }
1524
1525
1526 ast_case_statement_list::ast_case_statement_list(void)
1527 {
1528 }
1529
1530
1531 void
1532 ast_iteration_statement::print(void) const
1533 {
1534    switch (mode) {
1535    case ast_for:
1536       printf("for( ");
1537       if (init_statement)
1538          init_statement->print();
1539       printf("; ");
1540
1541       if (condition)
1542          condition->print();
1543       printf("; ");
1544
1545       if (rest_expression)
1546          rest_expression->print();
1547       printf(") ");
1548
1549       body->print();
1550       break;
1551
1552    case ast_while:
1553       printf("while ( ");
1554       if (condition)
1555          condition->print();
1556       printf(") ");
1557       body->print();
1558       break;
1559
1560    case ast_do_while:
1561       printf("do ");
1562       body->print();
1563       printf("while ( ");
1564       if (condition)
1565          condition->print();
1566       printf("); ");
1567       break;
1568    }
1569 }
1570
1571
1572 ast_iteration_statement::ast_iteration_statement(int mode,
1573                                                  ast_node *init,
1574                                                  ast_node *condition,
1575                                                  ast_expression *rest_expression,
1576                                                  ast_node *body)
1577 {
1578    this->mode = ast_iteration_modes(mode);
1579    this->init_statement = init;
1580    this->condition = condition;
1581    this->rest_expression = rest_expression;
1582    this->body = body;
1583 }
1584
1585
1586 void
1587 ast_struct_specifier::print(void) const
1588 {
1589    printf("struct %s { ", name);
1590    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1591       ast->print();
1592    }
1593    printf("} ");
1594 }
1595
1596
1597 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1598                                            ast_declarator_list *declarator_list)
1599 {
1600    if (identifier == NULL) {
1601       static mtx_t mutex = _MTX_INITIALIZER_NP;
1602       static unsigned anon_count = 1;
1603       unsigned count;
1604
1605       mtx_lock(&mutex);
1606       count = anon_count++;
1607       mtx_unlock(&mutex);
1608
1609       identifier = ralloc_asprintf(this, "#anon_struct_%04x", count);
1610    }
1611    name = identifier;
1612    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1613    is_declaration = true;
1614    layout = NULL;
1615 }
1616
1617 void ast_subroutine_list::print(void) const
1618 {
1619    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1620       if (&ast->link != this->declarations.get_head())
1621          printf(", ");
1622       ast->print();
1623    }
1624 }
1625
1626 static void
1627 set_shader_inout_layout(struct gl_shader *shader,
1628                      struct _mesa_glsl_parse_state *state)
1629 {
1630    /* Should have been prevented by the parser. */
1631    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1632        shader->Stage == MESA_SHADER_VERTEX) {
1633       assert(!state->in_qualifier->flags.i);
1634    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1635               shader->Stage != MESA_SHADER_TESS_EVAL) {
1636       assert(!state->in_qualifier->flags.i);
1637    }
1638
1639    if (shader->Stage != MESA_SHADER_COMPUTE) {
1640       /* Should have been prevented by the parser. */
1641       assert(!state->cs_input_local_size_specified);
1642    }
1643
1644    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1645       /* Should have been prevented by the parser. */
1646       assert(!state->fs_uses_gl_fragcoord);
1647       assert(!state->fs_redeclares_gl_fragcoord);
1648       assert(!state->fs_pixel_center_integer);
1649       assert(!state->fs_origin_upper_left);
1650       assert(!state->fs_early_fragment_tests);
1651    }
1652
1653    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1654       if (state->out_qualifier->out_xfb_stride[i]) {
1655          unsigned xfb_stride;
1656          if (state->out_qualifier->out_xfb_stride[i]->
1657                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1658                 true)) {
1659             shader->info.TransformFeedback.BufferStride[i] = xfb_stride;
1660          }
1661       }
1662    }
1663
1664    switch (shader->Stage) {
1665    case MESA_SHADER_TESS_CTRL:
1666       shader->info.TessCtrl.VerticesOut = 0;
1667       if (state->tcs_output_vertices_specified) {
1668          unsigned vertices;
1669          if (state->out_qualifier->vertices->
1670                process_qualifier_constant(state, "vertices", &vertices,
1671                                           false)) {
1672
1673             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1674             if (vertices > state->Const.MaxPatchVertices) {
1675                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1676                                 "GL_MAX_PATCH_VERTICES", vertices);
1677             }
1678             shader->info.TessCtrl.VerticesOut = vertices;
1679          }
1680       }
1681       break;
1682    case MESA_SHADER_TESS_EVAL:
1683       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1684       if (state->in_qualifier->flags.q.prim_type)
1685          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1686
1687       shader->info.TessEval.Spacing = 0;
1688       if (state->in_qualifier->flags.q.vertex_spacing)
1689          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1690
1691       shader->info.TessEval.VertexOrder = 0;
1692       if (state->in_qualifier->flags.q.ordering)
1693          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1694
1695       shader->info.TessEval.PointMode = -1;
1696       if (state->in_qualifier->flags.q.point_mode)
1697          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1698       break;
1699    case MESA_SHADER_GEOMETRY:
1700       shader->info.Geom.VerticesOut = -1;
1701       if (state->out_qualifier->flags.q.max_vertices) {
1702          unsigned qual_max_vertices;
1703          if (state->out_qualifier->max_vertices->
1704                process_qualifier_constant(state, "max_vertices",
1705                                           &qual_max_vertices, true, true)) {
1706
1707             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1708                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1709                _mesa_glsl_error(&loc, state,
1710                                 "maximum output vertices (%d) exceeds "
1711                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1712                                 qual_max_vertices);
1713             }
1714             shader->info.Geom.VerticesOut = qual_max_vertices;
1715          }
1716       }
1717
1718       if (state->gs_input_prim_type_specified) {
1719          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1720       } else {
1721          shader->info.Geom.InputType = PRIM_UNKNOWN;
1722       }
1723
1724       if (state->out_qualifier->flags.q.prim_type) {
1725          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1726       } else {
1727          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1728       }
1729
1730       shader->info.Geom.Invocations = 0;
1731       if (state->in_qualifier->flags.q.invocations) {
1732          unsigned invocations;
1733          if (state->in_qualifier->invocations->
1734                process_qualifier_constant(state, "invocations",
1735                                           &invocations, false)) {
1736
1737             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1738             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1739                _mesa_glsl_error(&loc, state,
1740                                 "invocations (%d) exceeds "
1741                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1742                                 invocations);
1743             }
1744             shader->info.Geom.Invocations = invocations;
1745          }
1746       }
1747       break;
1748
1749    case MESA_SHADER_COMPUTE:
1750       if (state->cs_input_local_size_specified) {
1751          for (int i = 0; i < 3; i++)
1752             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1753       } else {
1754          for (int i = 0; i < 3; i++)
1755             shader->info.Comp.LocalSize[i] = 0;
1756       }
1757       break;
1758
1759    case MESA_SHADER_FRAGMENT:
1760       shader->info.redeclares_gl_fragcoord =
1761          state->fs_redeclares_gl_fragcoord;
1762       shader->info.uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1763       shader->info.pixel_center_integer = state->fs_pixel_center_integer;
1764       shader->info.origin_upper_left = state->fs_origin_upper_left;
1765       shader->info.ARB_fragment_coord_conventions_enable =
1766          state->ARB_fragment_coord_conventions_enable;
1767       shader->info.EarlyFragmentTests = state->fs_early_fragment_tests;
1768       break;
1769
1770    default:
1771       /* Nothing to do. */
1772       break;
1773    }
1774 }
1775
1776 extern "C" {
1777
1778 static void
1779 assign_subroutine_indexes(struct gl_shader *sh,
1780                           struct _mesa_glsl_parse_state *state)
1781 {
1782    int j, k;
1783    int index = 0;
1784
1785    for (j = 0; j < state->num_subroutines; j++) {
1786       while (state->subroutines[j]->subroutine_index == -1) {
1787          for (k = 0; k < state->num_subroutines; k++) {
1788             if (state->subroutines[k]->subroutine_index == index)
1789                break;
1790             else if (k == state->num_subroutines - 1) {
1791                state->subroutines[j]->subroutine_index = index;
1792             }
1793          }
1794          index++;
1795       }
1796    }
1797 }
1798
1799 static void
1800 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1801                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1802                     struct glcpp_parser *data,
1803                     unsigned version,
1804                     bool es)
1805 {
1806    unsigned gl_version = state->ctx->Extensions.Version;
1807    gl_api api = state->ctx->API;
1808
1809    if (gl_version != 0xff) {
1810       unsigned i;
1811       for (i = 0; i < state->num_supported_versions; i++) {
1812          if (state->supported_versions[i].ver == version &&
1813              state->supported_versions[i].es == es) {
1814             gl_version = state->supported_versions[i].gl_ver;
1815             break;
1816          }
1817       }
1818
1819       if (i == state->num_supported_versions)
1820          return;
1821    }
1822
1823    if (es)
1824       api = API_OPENGLES2;
1825
1826    for (unsigned i = 0;
1827         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1828       const _mesa_glsl_extension *extension
1829          = &_mesa_glsl_supported_extensions[i];
1830       if (extension->compatible_with_state(state, api, gl_version)) {
1831          add_builtin_define(data, extension->name, 1);
1832       }
1833    }
1834 }
1835
1836 void
1837 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1838                           bool dump_ast, bool dump_hir)
1839 {
1840    struct _mesa_glsl_parse_state *state =
1841       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1842    const char *source = shader->Source;
1843
1844    if (ctx->Const.GenerateTemporaryNames)
1845       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1846                               false, true);
1847
1848    state->error = glcpp_preprocess(state, &source, &state->info_log,
1849                              add_builtin_defines, state, ctx);
1850
1851    if (!state->error) {
1852      _mesa_glsl_lexer_ctor(state, source);
1853      _mesa_glsl_parse(state);
1854      _mesa_glsl_lexer_dtor(state);
1855    }
1856
1857    if (dump_ast) {
1858       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1859          ast->print();
1860       }
1861       printf("\n\n");
1862    }
1863
1864    ralloc_free(shader->ir);
1865    shader->ir = new(shader) exec_list;
1866    if (!state->error && !state->translation_unit.is_empty())
1867       _mesa_ast_to_hir(shader->ir, state);
1868
1869    if (!state->error) {
1870       validate_ir_tree(shader->ir);
1871
1872       /* Print out the unoptimized IR. */
1873       if (dump_hir) {
1874          _mesa_print_ir(stdout, shader->ir, state);
1875       }
1876    }
1877
1878
1879    if (!state->error && !shader->ir->is_empty()) {
1880       struct gl_shader_compiler_options *options =
1881          &ctx->Const.ShaderCompilerOptions[shader->Stage];
1882
1883       assign_subroutine_indexes(shader, state);
1884       lower_subroutine(shader->ir, state);
1885       /* Do some optimization at compile time to reduce shader IR size
1886        * and reduce later work if the same shader is linked multiple times
1887        */
1888       while (do_common_optimization(shader->ir, false, false, options,
1889                                     ctx->Const.NativeIntegers))
1890          ;
1891
1892       validate_ir_tree(shader->ir);
1893
1894       enum ir_variable_mode other;
1895       switch (shader->Stage) {
1896       case MESA_SHADER_VERTEX:
1897          other = ir_var_shader_in;
1898          break;
1899       case MESA_SHADER_FRAGMENT:
1900          other = ir_var_shader_out;
1901          break;
1902       default:
1903          /* Something invalid to ensure optimize_dead_builtin_uniforms
1904           * doesn't remove anything other than uniforms or constants.
1905           */
1906          other = ir_var_mode_count;
1907          break;
1908       }
1909
1910       optimize_dead_builtin_variables(shader->ir, other);
1911
1912       validate_ir_tree(shader->ir);
1913    }
1914
1915    if (shader->InfoLog)
1916       ralloc_free(shader->InfoLog);
1917
1918    if (!state->error)
1919       set_shader_inout_layout(shader, state);
1920
1921    shader->symbols = new(shader->ir) glsl_symbol_table;
1922    shader->CompileStatus = !state->error;
1923    shader->InfoLog = state->info_log;
1924    shader->Version = state->language_version;
1925    shader->IsES = state->es_shader;
1926    shader->info.uses_builtin_functions = state->uses_builtin_functions;
1927
1928    /* Retain any live IR, but trash the rest. */
1929    reparent_ir(shader->ir, shader->ir);
1930
1931    /* Destroy the symbol table.  Create a new symbol table that contains only
1932     * the variables and functions that still exist in the IR.  The symbol
1933     * table will be used later during linking.
1934     *
1935     * There must NOT be any freed objects still referenced by the symbol
1936     * table.  That could cause the linker to dereference freed memory.
1937     *
1938     * We don't have to worry about types or interface-types here because those
1939     * are fly-weights that are looked up by glsl_type.
1940     */
1941    foreach_in_list (ir_instruction, ir, shader->ir) {
1942       switch (ir->ir_type) {
1943       case ir_type_function:
1944          shader->symbols->add_function((ir_function *) ir);
1945          break;
1946       case ir_type_variable: {
1947          ir_variable *const var = (ir_variable *) ir;
1948
1949          if (var->data.mode != ir_var_temporary)
1950             shader->symbols->add_variable(var);
1951          break;
1952       }
1953       default:
1954          break;
1955       }
1956    }
1957
1958    _mesa_glsl_initialize_derived_variables(ctx, shader);
1959
1960    delete state->symbols;
1961    ralloc_free(state);
1962 }
1963
1964 } /* extern "C" */
1965 /**
1966  * Do the set of common optimizations passes
1967  *
1968  * \param ir                          List of instructions to be optimized
1969  * \param linked                      Is the shader linked?  This enables
1970  *                                    optimizations passes that remove code at
1971  *                                    global scope and could cause linking to
1972  *                                    fail.
1973  * \param uniform_locations_assigned  Have locations already been assigned for
1974  *                                    uniforms?  This prevents the declarations
1975  *                                    of unused uniforms from being removed.
1976  *                                    The setting of this flag only matters if
1977  *                                    \c linked is \c true.
1978  * \param max_unroll_iterations       Maximum number of loop iterations to be
1979  *                                    unrolled.  Setting to 0 disables loop
1980  *                                    unrolling.
1981  * \param options                     The driver's preferred shader options.
1982  */
1983 bool
1984 do_common_optimization(exec_list *ir, bool linked,
1985                        bool uniform_locations_assigned,
1986                        const struct gl_shader_compiler_options *options,
1987                        bool native_integers)
1988 {
1989    const bool debug = false;
1990    GLboolean progress = GL_FALSE;
1991
1992 #define OPT(PASS, ...) do {                                             \
1993       if (debug) {                                                      \
1994          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
1995          const bool opt_progress = PASS(__VA_ARGS__);                   \
1996          progress = opt_progress || progress;                           \
1997          if (opt_progress)                                              \
1998             _mesa_print_ir(stderr, ir, NULL);                           \
1999          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2000                  #PASS, opt_progress ? "made" : "no");                  \
2001       } else {                                                          \
2002          progress = PASS(__VA_ARGS__) || progress;                      \
2003       }                                                                 \
2004    } while (false)
2005
2006    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2007
2008    if (linked) {
2009       OPT(do_function_inlining, ir);
2010       OPT(do_dead_functions, ir);
2011       OPT(do_structure_splitting, ir);
2012    }
2013    propagate_invariance(ir);
2014    OPT(do_if_simplification, ir);
2015    OPT(opt_flatten_nested_if_blocks, ir);
2016    OPT(opt_conditional_discard, ir);
2017    OPT(do_copy_propagation, ir);
2018    OPT(do_copy_propagation_elements, ir);
2019
2020    if (options->OptimizeForAOS && !linked)
2021       OPT(opt_flip_matrices, ir);
2022
2023    if (linked && options->OptimizeForAOS) {
2024       OPT(do_vectorize, ir);
2025    }
2026
2027    if (linked)
2028       OPT(do_dead_code, ir, uniform_locations_assigned);
2029    else
2030       OPT(do_dead_code_unlinked, ir);
2031    OPT(do_dead_code_local, ir);
2032    OPT(do_tree_grafting, ir);
2033    OPT(do_constant_propagation, ir);
2034    if (linked)
2035       OPT(do_constant_variable, ir);
2036    else
2037       OPT(do_constant_variable_unlinked, ir);
2038    OPT(do_constant_folding, ir);
2039    OPT(do_minmax_prune, ir);
2040    OPT(do_rebalance_tree, ir);
2041    OPT(do_algebraic, ir, native_integers, options);
2042    OPT(do_lower_jumps, ir);
2043    OPT(do_vec_index_to_swizzle, ir);
2044    OPT(lower_vector_insert, ir, false);
2045    OPT(do_swizzle_swizzle, ir);
2046    OPT(do_noop_swizzle, ir);
2047
2048    OPT(optimize_split_arrays, ir, linked);
2049    OPT(optimize_redundant_jumps, ir);
2050
2051    loop_state *ls = analyze_loop_variables(ir);
2052    if (ls->loop_found) {
2053       OPT(set_loop_controls, ir, ls);
2054       OPT(unroll_loops, ir, ls, options);
2055    }
2056    delete ls;
2057
2058 #undef OPT
2059
2060    return progress;
2061 }
2062
2063 extern "C" {
2064
2065 /**
2066  * To be called at GL teardown time, this frees compiler datastructures.
2067  *
2068  * After calling this, any previously compiled shaders and shader
2069  * programs would be invalid.  So this should happen at approximately
2070  * program exit.
2071  */
2072 void
2073 _mesa_destroy_shader_compiler(void)
2074 {
2075    _mesa_destroy_shader_compiler_caches();
2076
2077    _mesa_glsl_release_types();
2078 }
2079
2080 /**
2081  * Releases compiler caches to trade off performance for memory.
2082  *
2083  * Intended to be used with glReleaseShaderCompiler().
2084  */
2085 void
2086 _mesa_destroy_shader_compiler_caches(void)
2087 {
2088    _mesa_glsl_release_builtin_functions();
2089 }
2090
2091 }