src/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 extern "C" {
  29 #include "main/core.h" /* for struct gl_context */
  30 #include "main/context.h"
  31 #include "main/shaderobj.h"
  32 }
  33
  34 #include "ralloc.h"
  35 #include "ast.h"
  36 #include "glsl_parser_extras.h"
  37 #include "glsl_parser.h"
  38 #include "ir_optimization.h"
  39 #include "loop_analysis.h"
  40
  41 /**
  42  * Format a short human-readable description of the given GLSL version.
  43  */
  44 const char *
  45 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  46 {
  47    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  48                           version / 100, version % 100);
  49 }
  50
  51
  52 static unsigned known_desktop_glsl_versions[] =
  53    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440 };
  54
  55
  56 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  57                                                gl_shader_stage stage,
  58                                                void *mem_ctx)
  59    : ctx(_ctx), switch_state()
  60 {
  61    assert(stage < MESA_SHADER_STAGES);
  62    this->stage = stage;
  63
  64    this->scanner = NULL;
  65    this->translation_unit.make_empty();
  66    this->symbols = new(mem_ctx) glsl_symbol_table;
  67
  68    this->num_uniform_blocks = 0;
  69    this->uniform_block_array_size = 0;
  70    this->uniform_blocks = NULL;
  71
  72    this->info_log = ralloc_strdup(mem_ctx, "");
  73    this->error = false;
  74    this->loop_nesting_ast = NULL;
  75
  76    this->struct_specifier_depth = 0;
  77
  78    this->uses_builtin_functions = false;
  79
  80    /* Set default language version and extensions */
  81    this->language_version = ctx->Const.ForceGLSLVersion ?
  82                             ctx->Const.ForceGLSLVersion : 110;
  83    this->es_shader = false;
  84    this->ARB_texture_rectangle_enable = true;
  85
  86    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  87    if (ctx->API == API_OPENGLES2) {
  88       this->language_version = 100;
  89       this->es_shader = true;
  90       this->ARB_texture_rectangle_enable = false;
  91    }
  92
  93    this->extensions = &ctx->Extensions;
  94
  95    this->Const.MaxLights = ctx->Const.MaxLights;
  96    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
  97    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
  98    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
  99    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 100    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 101    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 102    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 103    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 104    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 105    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 106    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 107
 108    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 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.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 122    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 123    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 124    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 125
 126    this->current_function = NULL;
 127    this->toplevel_ir = NULL;
 128    this->found_return = false;
 129    this->all_invariant = false;
 130    this->user_structures = NULL;
 131    this->num_user_structures = 0;
 132
 133    /* Populate the list of supported GLSL versions */
 134    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 135     * the OpenGL 3.2 Core context is supported, this logic will need
 136     * change.  Older versions of GLSL are no longer supported
 137     * outside the compatibility contexts of 3.x.
 138     */
 139    this->num_supported_versions = 0;
 140    if (_mesa_is_desktop_gl(ctx)) {
 141       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 142          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 143             this->supported_versions[this->num_supported_versions].ver
 144                = known_desktop_glsl_versions[i];
 145             this->supported_versions[this->num_supported_versions].es = false;
 146             this->num_supported_versions++;
 147          }
 148       }
 149    }
 150    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 151       this->supported_versions[this->num_supported_versions].ver = 100;
 152       this->supported_versions[this->num_supported_versions].es = true;
 153       this->num_supported_versions++;
 154    }
 155    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 156       this->supported_versions[this->num_supported_versions].ver = 300;
 157       this->supported_versions[this->num_supported_versions].es = true;
 158       this->num_supported_versions++;
 159    }
 160    assert(this->num_supported_versions
 161           <= ARRAY_SIZE(this->supported_versions));
 162
 163    /* Create a string for use in error messages to tell the user which GLSL
 164     * versions are supported.
 165     */
 166    char *supported = ralloc_strdup(this, "");
 167    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 168       unsigned ver = this->supported_versions[i].ver;
 169       const char *const prefix = (i == 0)
 170          ? ""
 171          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 172       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 173
 174       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 175                              prefix,
 176                              ver / 100, ver % 100,
 177                              suffix);
 178    }
 179
 180    this->supported_version_string = supported;
 181
 182    if (ctx->Const.ForceGLSLExtensionsWarn)
 183       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 184
 185    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 186    this->default_uniform_qualifier->flags.q.shared = 1;
 187    this->default_uniform_qualifier->flags.q.column_major = 1;
 188
 189    this->gs_input_prim_type_specified = false;
 190    this->gs_input_prim_type = GL_POINTS;
 191    this->gs_input_size = 0;
 192    this->out_qualifier = new(this) ast_type_qualifier();
 193    memset(this->atomic_counter_offsets, 0,
 194           sizeof(this->atomic_counter_offsets));
 195 }
 196
 197 /**
 198  * Determine whether the current GLSL version is sufficiently high to support
 199  * a certain feature, and generate an error message if it isn't.
 200  *
 201  * \param required_glsl_version and \c required_glsl_es_version are
 202  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 203  *
 204  * \param locp is the parser location where the error should be reported.
 205  *
 206  * \param fmt (and additional arguments) constitute a printf-style error
 207  * message to report if the version check fails.  Information about the
 208  * current and required GLSL versions will be appended.  So, for example, if
 209  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 210  * "foo unsupported") is called, the error message will be "foo unsupported in
 211  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 212  */
 213 bool
 214 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 215                                       unsigned required_glsl_es_version,
 216                                       YYLTYPE *locp, const char *fmt, ...)
 217 {
 218    if (this->is_version(required_glsl_version, required_glsl_es_version))
 219       return true;
 220
 221    va_list args;
 222    va_start(args, fmt);
 223    char *problem = ralloc_vasprintf(this, fmt, args);
 224    va_end(args);
 225    const char *glsl_version_string
 226       = glsl_compute_version_string(this, false, required_glsl_version);
 227    const char *glsl_es_version_string
 228       = glsl_compute_version_string(this, true, required_glsl_es_version);
 229    const char *requirement_string = "";
 230    if (required_glsl_version && required_glsl_es_version) {
 231       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 232                                            glsl_version_string,
 233                                            glsl_es_version_string);
 234    } else if (required_glsl_version) {
 235       requirement_string = ralloc_asprintf(this, " (%s required)",
 236                                            glsl_version_string);
 237    } else if (required_glsl_es_version) {
 238       requirement_string = ralloc_asprintf(this, " (%s required)",
 239                                            glsl_es_version_string);
 240    }
 241    _mesa_glsl_error(locp, this, "%s in %s%s",
 242                     problem, this->get_version_string(),
 243                     requirement_string);
 244
 245    return false;
 246 }
 247
 248 /**
 249  * Process a GLSL #version directive.
 250  *
 251  * \param version is the integer that follows the #version token.
 252  *
 253  * \param ident is a string identifier that follows the integer, if any is
 254  * present.  Otherwise NULL.
 255  */
 256 void
 257 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 258                                                   const char *ident)
 259 {
 260    bool es_token_present = false;
 261    if (ident) {
 262       if (strcmp(ident, "es") == 0) {
 263          es_token_present = true;
 264       } else if (version >= 150) {
 265          if (strcmp(ident, "core") == 0) {
 266             /* Accept the token.  There's no need to record that this is
 267              * a core profile shader since that's the only profile we support.
 268              */
 269          } else if (strcmp(ident, "compatibility") == 0) {
 270             _mesa_glsl_error(locp, this,
 271                              "the compatibility profile is not supported");
 272          } else {
 273             _mesa_glsl_error(locp, this,
 274                              "\"%s\" is not a valid shading language profile; "
 275                              "if present, it must be \"core\"", ident);
 276          }
 277       } else {
 278          _mesa_glsl_error(locp, this,
 279                           "illegal text following version number");
 280       }
 281    }
 282
 283    this->es_shader = es_token_present;
 284    if (version == 100) {
 285       if (es_token_present) {
 286          _mesa_glsl_error(locp, this,
 287                           "GLSL 1.00 ES should be selected using "
 288                           "`#version 100'");
 289       } else {
 290          this->es_shader = true;
 291       }
 292    }
 293
 294    this->language_version = version;
 295
 296    bool supported = false;
 297    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 298       if (this->supported_versions[i].ver == (unsigned) version
 299           && this->supported_versions[i].es == this->es_shader) {
 300          supported = true;
 301          break;
 302       }
 303    }
 304
 305    if (!supported) {
 306       _mesa_glsl_error(locp, this, "%s is not supported. "
 307                        "Supported versions are: %s",
 308                        this->get_version_string(),
 309                        this->supported_version_string);
 310
 311       /* On exit, the language_version must be set to a valid value.
 312        * Later calls to _mesa_glsl_initialize_types will misbehave if
 313        * the version is invalid.
 314        */
 315       switch (this->ctx->API) {
 316       case API_OPENGL_COMPAT:
 317       case API_OPENGL_CORE:
 318          this->language_version = this->ctx->Const.GLSLVersion;
 319          break;
 320
 321       case API_OPENGLES:
 322          assert(!"Should not get here.");
 323          /* FALLTHROUGH */
 324
 325       case API_OPENGLES2:
 326          this->language_version = 100;
 327          break;
 328       }
 329    }
 330 }
 331
 332
 333 /**
 334  * Translate a gl_shader_stage to a short shader stage name for debug
 335  * printouts and error messages.
 336  */
 337 const char *
 338 _mesa_shader_stage_to_string(unsigned stage)
 339 {
 340    switch (stage) {
 341    case MESA_SHADER_VERTEX:   return "vertex";
 342    case MESA_SHADER_FRAGMENT: return "fragment";
 343    case MESA_SHADER_GEOMETRY: return "geometry";
 344    }
 345
 346    assert(!"Should not get here.");
 347    return "unknown";
 348 }
 349
 350 /* This helper function will append the given message to the shader's
 351    info log and report it via GL_ARB_debug_output. Per that extension,
 352    'type' is one of the enum values classifying the message, and
 353    'id' is the implementation-defined ID of the given message. */
 354 static void
 355 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 356                GLenum type, const char *fmt, va_list ap)
 357 {
 358    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 359    GLuint msg_id = 0;
 360
 361    assert(state->info_log != NULL);
 362
 363    /* Get the offset that the new message will be written to. */
 364    int msg_offset = strlen(state->info_log);
 365
 366    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 367                                             locp->source,
 368                                             locp->first_line,
 369                                             locp->first_column,
 370                                             error ? "error" : "warning");
 371    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 372
 373    const char *const msg = &state->info_log[msg_offset];
 374    struct gl_context *ctx = state->ctx;
 375
 376    /* Report the error via GL_ARB_debug_output. */
 377    _mesa_shader_debug(ctx, type, &msg_id, msg, strlen(msg));
 378
 379    ralloc_strcat(&state->info_log, "\n");
 380 }
 381
 382 void
 383 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 384                  const char *fmt, ...)
 385 {
 386    va_list ap;
 387
 388    state->error = true;
 389
 390    va_start(ap, fmt);
 391    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 392    va_end(ap);
 393 }
 394
 395
 396 void
 397 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 398                    const char *fmt, ...)
 399 {
 400    va_list ap;
 401
 402    va_start(ap, fmt);
 403    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 404    va_end(ap);
 405 }
 406
 407
 408 /**
 409  * Enum representing the possible behaviors that can be specified in
 410  * an #extension directive.
 411  */
 412 enum ext_behavior {
 413    extension_disable,
 414    extension_enable,
 415    extension_require,
 416    extension_warn
 417 };
 418
 419 /**
 420  * Element type for _mesa_glsl_supported_extensions
 421  */
 422 struct _mesa_glsl_extension {
 423    /**
 424     * Name of the extension when referred to in a GLSL extension
 425     * statement
 426     */
 427    const char *name;
 428
 429    /** True if this extension is available to desktop GL shaders */
 430    bool avail_in_GL;
 431
 432    /** True if this extension is available to GLES shaders */
 433    bool avail_in_ES;
 434
 435    /**
 436     * Flag in the gl_extensions struct indicating whether this
 437     * extension is supported by the driver, or
 438     * &gl_extensions::dummy_true if supported by all drivers.
 439     *
 440     * Note: the type (GLboolean gl_extensions::*) is a "pointer to
 441     * member" type, the type-safe alternative to the "offsetof" macro.
 442     * In a nutshell:
 443     *
 444     * - foo bar::* p declares p to be an "offset" to a field of type
 445     *   foo that exists within struct bar
 446     * - &bar::baz computes the "offset" of field baz within struct bar
 447     * - x.*p accesses the field of x that exists at "offset" p
 448     * - x->*p is equivalent to (*x).*p
 449     */
 450    const GLboolean gl_extensions::* supported_flag;
 451
 452    /**
 453     * Flag in the _mesa_glsl_parse_state struct that should be set
 454     * when this extension is enabled.
 455     *
 456     * See note in _mesa_glsl_extension::supported_flag about "pointer
 457     * to member" types.
 458     */
 459    bool _mesa_glsl_parse_state::* enable_flag;
 460
 461    /**
 462     * Flag in the _mesa_glsl_parse_state struct that should be set
 463     * when the shader requests "warn" behavior for this extension.
 464     *
 465     * See note in _mesa_glsl_extension::supported_flag about "pointer
 466     * to member" types.
 467     */
 468    bool _mesa_glsl_parse_state::* warn_flag;
 469
 470
 471    bool compatible_with_state(const _mesa_glsl_parse_state *state) const;
 472    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 473 };
 474
 475 #define EXT(NAME, GL, ES, SUPPORTED_FLAG)                   \
 476    { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG,   \
 477          &_mesa_glsl_parse_state::NAME##_enable,            \
 478          &_mesa_glsl_parse_state::NAME##_warn }
 479
 480 /**
 481  * Table of extensions that can be enabled/disabled within a shader,
 482  * and the conditions under which they are supported.
 483  */
 484 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 485    /*                                  API availability */
 486    /* name                             GL     ES         supported flag */
 487    EXT(ARB_arrays_of_arrays,           true,  false,     ARB_arrays_of_arrays),
 488    EXT(ARB_conservative_depth,         true,  false,     ARB_conservative_depth),
 489    EXT(ARB_draw_buffers,               true,  false,     dummy_true),
 490    EXT(ARB_draw_instanced,             true,  false,     ARB_draw_instanced),
 491    EXT(ARB_explicit_attrib_location,   true,  false,     ARB_explicit_attrib_location),
 492    EXT(ARB_fragment_coord_conventions, true,  false,     ARB_fragment_coord_conventions),
 493    EXT(ARB_texture_rectangle,          true,  false,     dummy_true),
 494    EXT(EXT_texture_array,              true,  false,     EXT_texture_array),
 495    EXT(ARB_shader_texture_lod,         true,  false,     ARB_shader_texture_lod),
 496    EXT(ARB_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
 497    EXT(AMD_conservative_depth,         true,  false,     ARB_conservative_depth),
 498    EXT(AMD_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
 499    EXT(OES_texture_3D,                 false, true,      EXT_texture3D),
 500    EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
 501    EXT(ARB_shader_bit_encoding,        true,  false,     ARB_shader_bit_encoding),
 502    EXT(ARB_uniform_buffer_object,      true,  false,     ARB_uniform_buffer_object),
 503    EXT(OES_standard_derivatives,       false,  true,     OES_standard_derivatives),
 504    EXT(ARB_texture_cube_map_array,     true,  false,     ARB_texture_cube_map_array),
 505    EXT(ARB_shading_language_packing,   true,  false,     ARB_shading_language_packing),
 506    EXT(ARB_shading_language_420pack,   true,  false,     ARB_shading_language_420pack),
 507    EXT(ARB_texture_multisample,        true,  false,     ARB_texture_multisample),
 508    EXT(ARB_texture_query_levels,       true,  false,     ARB_texture_query_levels),
 509    EXT(ARB_texture_query_lod,          true,  false,     ARB_texture_query_lod),
 510    EXT(ARB_gpu_shader5,                true,  false,     ARB_gpu_shader5),
 511    EXT(AMD_vertex_shader_layer,        true,  false,     AMD_vertex_shader_layer),
 512    EXT(EXT_shader_integer_mix,         true,  true,      EXT_shader_integer_mix),
 513    EXT(ARB_texture_gather,             true,  false,     ARB_texture_gather),
 514    EXT(ARB_shader_atomic_counters,     true,  false,     ARB_shader_atomic_counters),
 515    EXT(ARB_sample_shading,             true,  false,     ARB_sample_shading),
 516    EXT(AMD_shader_trinary_minmax,      true,  false,     dummy_true),
 517    EXT(ARB_viewport_array,             true,  false,     ARB_viewport_array),
 518 };
 519
 520 #undef EXT
 521
 522
 523 /**
 524  * Determine whether a given extension is compatible with the target,
 525  * API, and extension information in the current parser state.
 526  */
 527 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state *
 528                                                  state) const
 529 {
 530    /* Check that this extension matches whether we are compiling
 531     * for desktop GL or GLES.
 532     */
 533    if (state->es_shader) {
 534       if (!this->avail_in_ES) return false;
 535    } else {
 536       if (!this->avail_in_GL) return false;
 537    }
 538
 539    /* Check that this extension is supported by the OpenGL
 540     * implementation.
 541     *
 542     * Note: the ->* operator indexes into state->extensions by the
 543     * offset this->supported_flag.  See
 544     * _mesa_glsl_extension::supported_flag for more info.
 545     */
 546    return state->extensions->*(this->supported_flag);
 547 }
 548
 549 /**
 550  * Set the appropriate flags in the parser state to establish the
 551  * given behavior for this extension.
 552  */
 553 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 554                                      ext_behavior behavior) const
 555 {
 556    /* Note: the ->* operator indexes into state by the
 557     * offsets this->enable_flag and this->warn_flag.  See
 558     * _mesa_glsl_extension::supported_flag for more info.
 559     */
 560    state->*(this->enable_flag) = (behavior != extension_disable);
 561    state->*(this->warn_flag)   = (behavior == extension_warn);
 562 }
 563
 564 /**
 565  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 566  * the name is not found, return NULL.
 567  */
 568 static const _mesa_glsl_extension *find_extension(const char *name)
 569 {
 570    for (unsigned i = 0; i < Elements(_mesa_glsl_supported_extensions); ++i) {
 571       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 572          return &_mesa_glsl_supported_extensions[i];
 573       }
 574    }
 575    return NULL;
 576 }
 577
 578
 579 bool
 580 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 581                              const char *behavior_string, YYLTYPE *behavior_locp,
 582                              _mesa_glsl_parse_state *state)
 583 {
 584    ext_behavior behavior;
 585    if (strcmp(behavior_string, "warn") == 0) {
 586       behavior = extension_warn;
 587    } else if (strcmp(behavior_string, "require") == 0) {
 588       behavior = extension_require;
 589    } else if (strcmp(behavior_string, "enable") == 0) {
 590       behavior = extension_enable;
 591    } else if (strcmp(behavior_string, "disable") == 0) {
 592       behavior = extension_disable;
 593    } else {
 594       _mesa_glsl_error(behavior_locp, state,
 595                        "unknown extension behavior `%s'",
 596                        behavior_string);
 597       return false;
 598    }
 599
 600    if (strcmp(name, "all") == 0) {
 601       if ((behavior == extension_enable) || (behavior == extension_require)) {
 602          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 603                           (behavior == extension_enable)
 604                           ? "enable" : "require");
 605          return false;
 606       } else {
 607          for (unsigned i = 0;
 608               i < Elements(_mesa_glsl_supported_extensions); ++i) {
 609             const _mesa_glsl_extension *extension
 610                = &_mesa_glsl_supported_extensions[i];
 611             if (extension->compatible_with_state(state)) {
 612                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 613             }
 614          }
 615       }
 616    } else {
 617       const _mesa_glsl_extension *extension = find_extension(name);
 618       if (extension && extension->compatible_with_state(state)) {
 619          extension->set_flags(state, behavior);
 620       } else {
 621          static const char *const fmt = "extension `%s' unsupported in %s shader";
 622
 623          if (behavior == extension_require) {
 624             _mesa_glsl_error(name_locp, state, fmt,
 625                              name, _mesa_shader_stage_to_string(state->stage));
 626             return false;
 627          } else {
 628             _mesa_glsl_warning(name_locp, state, fmt,
 629                                name, _mesa_shader_stage_to_string(state->stage));
 630          }
 631       }
 632    }
 633
 634    return true;
 635 }
 636
 637
 638 /**
 639  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 640  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 641  * (process_array_constructor, et al) sufficient information to do type
 642  * checking.
 643  *
 644  * Operates on assignments involving an aggregate initializer. E.g.,
 645  *
 646  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 647  *
 648  * or more ridiculously,
 649  *
 650  * struct S {
 651  *     vec4 v[2];
 652  * };
 653  *
 654  * struct {
 655  *     S a[2], b;
 656  *     int c;
 657  * } aggregate = {
 658  *     {
 659  *         {
 660  *             {
 661  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 662  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 663  *             } // a[0].v
 664  *         }, // a[0]
 665  *         {
 666  *             {
 667  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 668  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 669  *             } // a[1].v
 670  *         } // a[1]
 671  *     }, // a
 672  *     {
 673  *         {
 674  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 675  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 676  *         } // b.v
 677  *     }, // b
 678  *     4 // c
 679  * };
 680  *
 681  * This pass is necessary because the right-hand side of <type> e = { ... }
 682  * doesn't contain sufficient information to determine if the types match.
 683  */
 684 void
 685 _mesa_ast_set_aggregate_type(const glsl_type *type,
 686                              ast_expression *expr)
 687 {
 688    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 689    ai->constructor_type = type;
 690
 691    /* If the aggregate is an array, recursively set its elements' types. */
 692    if (type->is_array()) {
 693       /* Each array element has the type type->element_type().
 694        *
 695        * E.g., if <type> if struct S[2] we want to set each element's type to
 696        * struct S.
 697        */
 698       for (exec_node *expr_node = ai->expressions.head;
 699            !expr_node->is_tail_sentinel();
 700            expr_node = expr_node->next) {
 701          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 702                                                link);
 703
 704          if (expr->oper == ast_aggregate)
 705             _mesa_ast_set_aggregate_type(type->element_type(), expr);
 706       }
 707
 708    /* If the aggregate is a struct, recursively set its fields' types. */
 709    } else if (type->is_record()) {
 710       exec_node *expr_node = ai->expressions.head;
 711
 712       /* Iterate through the struct's fields. */
 713       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 714            i++, expr_node = expr_node->next) {
 715          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 716                                                link);
 717
 718          if (expr->oper == ast_aggregate) {
 719             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 720          }
 721       }
 722    /* If the aggregate is a matrix, set its columns' types. */
 723    } else if (type->is_matrix()) {
 724       for (exec_node *expr_node = ai->expressions.head;
 725            !expr_node->is_tail_sentinel();
 726            expr_node = expr_node->next) {
 727          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 728                                                link);
 729
 730          if (expr->oper == ast_aggregate)
 731             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 732       }
 733    }
 734 }
 735
 736
 737 void
 738 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 739 {
 740    if (q->flags.q.constant)
 741       printf("const ");
 742
 743    if (q->flags.q.invariant)
 744       printf("invariant ");
 745
 746    if (q->flags.q.attribute)
 747       printf("attribute ");
 748
 749    if (q->flags.q.varying)
 750       printf("varying ");
 751
 752    if (q->flags.q.in && q->flags.q.out)
 753       printf("inout ");
 754    else {
 755       if (q->flags.q.in)
 756          printf("in ");
 757
 758       if (q->flags.q.out)
 759          printf("out ");
 760    }
 761
 762    if (q->flags.q.centroid)
 763       printf("centroid ");
 764    if (q->flags.q.sample)
 765       printf("sample ");
 766    if (q->flags.q.uniform)
 767       printf("uniform ");
 768    if (q->flags.q.smooth)
 769       printf("smooth ");
 770    if (q->flags.q.flat)
 771       printf("flat ");
 772    if (q->flags.q.noperspective)
 773       printf("noperspective ");
 774 }
 775
 776
 777 void
 778 ast_node::print(void) const
 779 {
 780    printf("unhandled node ");
 781 }
 782
 783
 784 ast_node::ast_node(void)
 785 {
 786    this->location.source = 0;
 787    this->location.line = 0;
 788    this->location.column = 0;
 789 }
 790
 791
 792 static void
 793 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
 794 {
 795    if (array_specifier)
 796       array_specifier->print();
 797 }
 798
 799
 800 void
 801 ast_compound_statement::print(void) const
 802 {
 803    printf("{\n");
 804
 805    foreach_list_const(n, &this->statements) {
 806       ast_node *ast = exec_node_data(ast_node, n, link);
 807       ast->print();
 808    }
 809
 810    printf("}\n");
 811 }
 812
 813
 814 ast_compound_statement::ast_compound_statement(int new_scope,
 815                                                ast_node *statements)
 816 {
 817    this->new_scope = new_scope;
 818
 819    if (statements != NULL) {
 820       this->statements.push_degenerate_list_at_head(&statements->link);
 821    }
 822 }
 823
 824
 825 void
 826 ast_expression::print(void) const
 827 {
 828    switch (oper) {
 829    case ast_assign:
 830    case ast_mul_assign:
 831    case ast_div_assign:
 832    case ast_mod_assign:
 833    case ast_add_assign:
 834    case ast_sub_assign:
 835    case ast_ls_assign:
 836    case ast_rs_assign:
 837    case ast_and_assign:
 838    case ast_xor_assign:
 839    case ast_or_assign:
 840       subexpressions[0]->print();
 841       printf("%s ", operator_string(oper));
 842       subexpressions[1]->print();
 843       break;
 844
 845    case ast_field_selection:
 846       subexpressions[0]->print();
 847       printf(". %s ", primary_expression.identifier);
 848       break;
 849
 850    case ast_plus:
 851    case ast_neg:
 852    case ast_bit_not:
 853    case ast_logic_not:
 854    case ast_pre_inc:
 855    case ast_pre_dec:
 856       printf("%s ", operator_string(oper));
 857       subexpressions[0]->print();
 858       break;
 859
 860    case ast_post_inc:
 861    case ast_post_dec:
 862       subexpressions[0]->print();
 863       printf("%s ", operator_string(oper));
 864       break;
 865
 866    case ast_conditional:
 867       subexpressions[0]->print();
 868       printf("? ");
 869       subexpressions[1]->print();
 870       printf(": ");
 871       subexpressions[2]->print();
 872       break;
 873
 874    case ast_array_index:
 875       subexpressions[0]->print();
 876       printf("[ ");
 877       subexpressions[1]->print();
 878       printf("] ");
 879       break;
 880
 881    case ast_function_call: {
 882       subexpressions[0]->print();
 883       printf("( ");
 884
 885       foreach_list_const (n, &this->expressions) {
 886          if (n != this->expressions.get_head())
 887             printf(", ");
 888
 889          ast_node *ast = exec_node_data(ast_node, n, link);
 890          ast->print();
 891       }
 892
 893       printf(") ");
 894       break;
 895    }
 896
 897    case ast_identifier:
 898       printf("%s ", primary_expression.identifier);
 899       break;
 900
 901    case ast_int_constant:
 902       printf("%d ", primary_expression.int_constant);
 903       break;
 904
 905    case ast_uint_constant:
 906       printf("%u ", primary_expression.uint_constant);
 907       break;
 908
 909    case ast_float_constant:
 910       printf("%f ", primary_expression.float_constant);
 911       break;
 912
 913    case ast_bool_constant:
 914       printf("%s ",
 915              primary_expression.bool_constant
 916              ? "true" : "false");
 917       break;
 918
 919    case ast_sequence: {
 920       printf("( ");
 921       foreach_list_const(n, & this->expressions) {
 922          if (n != this->expressions.get_head())
 923             printf(", ");
 924
 925          ast_node *ast = exec_node_data(ast_node, n, link);
 926          ast->print();
 927       }
 928       printf(") ");
 929       break;
 930    }
 931
 932    case ast_aggregate: {
 933       printf("{ ");
 934       foreach_list_const(n, & this->expressions) {
 935          if (n != this->expressions.get_head())
 936             printf(", ");
 937
 938          ast_node *ast = exec_node_data(ast_node, n, link);
 939          ast->print();
 940       }
 941       printf("} ");
 942       break;
 943    }
 944
 945    default:
 946       assert(0);
 947       break;
 948    }
 949 }
 950
 951 ast_expression::ast_expression(int oper,
 952                                ast_expression *ex0,
 953                                ast_expression *ex1,
 954                                ast_expression *ex2) :
 955    primary_expression()
 956 {
 957    this->oper = ast_operators(oper);
 958    this->subexpressions[0] = ex0;
 959    this->subexpressions[1] = ex1;
 960    this->subexpressions[2] = ex2;
 961    this->non_lvalue_description = NULL;
 962 }
 963
 964
 965 void
 966 ast_expression_statement::print(void) const
 967 {
 968    if (expression)
 969       expression->print();
 970
 971    printf("; ");
 972 }
 973
 974
 975 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 976    expression(ex)
 977 {
 978    /* empty */
 979 }
 980
 981
 982 void
 983 ast_function::print(void) const
 984 {
 985    return_type->print();
 986    printf(" %s (", identifier);
 987
 988    foreach_list_const(n, & this->parameters) {
 989       ast_node *ast = exec_node_data(ast_node, n, link);
 990       ast->print();
 991    }
 992
 993    printf(")");
 994 }
 995
 996
 997 ast_function::ast_function(void)
 998    : return_type(NULL), identifier(NULL), is_definition(false),
 999      signature(NULL)
1000 {
1001    /* empty */
1002 }
1003
1004
1005 void
1006 ast_fully_specified_type::print(void) const
1007 {
1008    _mesa_ast_type_qualifier_print(& qualifier);
1009    specifier->print();
1010 }
1011
1012
1013 void
1014 ast_parameter_declarator::print(void) const
1015 {
1016    type->print();
1017    if (identifier)
1018       printf("%s ", identifier);
1019    ast_opt_array_dimensions_print(array_specifier);
1020 }
1021
1022
1023 void
1024 ast_function_definition::print(void) const
1025 {
1026    prototype->print();
1027    body->print();
1028 }
1029
1030
1031 void
1032 ast_declaration::print(void) const
1033 {
1034    printf("%s ", identifier);
1035    ast_opt_array_dimensions_print(array_specifier);
1036
1037    if (initializer) {
1038       printf("= ");
1039       initializer->print();
1040    }
1041 }
1042
1043
1044 ast_declaration::ast_declaration(const char *identifier,
1045                                  ast_array_specifier *array_specifier,
1046                                  ast_expression *initializer)
1047 {
1048    this->identifier = identifier;
1049    this->array_specifier = array_specifier;
1050    this->initializer = initializer;
1051 }
1052
1053
1054 void
1055 ast_declarator_list::print(void) const
1056 {
1057    assert(type || invariant);
1058
1059    if (type)
1060       type->print();
1061    else
1062       printf("invariant ");
1063
1064    foreach_list_const (ptr, & this->declarations) {
1065       if (ptr != this->declarations.get_head())
1066          printf(", ");
1067
1068       ast_node *ast = exec_node_data(ast_node, ptr, link);
1069       ast->print();
1070    }
1071
1072    printf("; ");
1073 }
1074
1075
1076 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1077 {
1078    this->type = type;
1079    this->invariant = false;
1080 }
1081
1082 void
1083 ast_jump_statement::print(void) const
1084 {
1085    switch (mode) {
1086    case ast_continue:
1087       printf("continue; ");
1088       break;
1089    case ast_break:
1090       printf("break; ");
1091       break;
1092    case ast_return:
1093       printf("return ");
1094       if (opt_return_value)
1095          opt_return_value->print();
1096
1097       printf("; ");
1098       break;
1099    case ast_discard:
1100       printf("discard; ");
1101       break;
1102    }
1103 }
1104
1105
1106 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1107    : opt_return_value(NULL)
1108 {
1109    this->mode = ast_jump_modes(mode);
1110
1111    if (mode == ast_return)
1112       opt_return_value = return_value;
1113 }
1114
1115
1116 void
1117 ast_selection_statement::print(void) const
1118 {
1119    printf("if ( ");
1120    condition->print();
1121    printf(") ");
1122
1123    then_statement->print();
1124
1125    if (else_statement) {
1126       printf("else ");
1127       else_statement->print();
1128    }
1129
1130 }
1131
1132
1133 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1134                                                  ast_node *then_statement,
1135                                                  ast_node *else_statement)
1136 {
1137    this->condition = condition;
1138    this->then_statement = then_statement;
1139    this->else_statement = else_statement;
1140 }
1141
1142
1143 void
1144 ast_switch_statement::print(void) const
1145 {
1146    printf("switch ( ");
1147    test_expression->print();
1148    printf(") ");
1149
1150    body->print();
1151 }
1152
1153
1154 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1155                                            ast_node *body)
1156 {
1157    this->test_expression = test_expression;
1158    this->body = body;
1159 }
1160
1161
1162 void
1163 ast_switch_body::print(void) const
1164 {
1165    printf("{\n");
1166    if (stmts != NULL) {
1167       stmts->print();
1168    }
1169    printf("}\n");
1170 }
1171
1172
1173 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1174 {
1175    this->stmts = stmts;
1176 }
1177
1178
1179 void ast_case_label::print(void) const
1180 {
1181    if (test_value != NULL) {
1182       printf("case ");
1183       test_value->print();
1184       printf(": ");
1185    } else {
1186       printf("default: ");
1187    }
1188 }
1189
1190
1191 ast_case_label::ast_case_label(ast_expression *test_value)
1192 {
1193    this->test_value = test_value;
1194 }
1195
1196
1197 void ast_case_label_list::print(void) const
1198 {
1199    foreach_list_const(n, & this->labels) {
1200       ast_node *ast = exec_node_data(ast_node, n, link);
1201       ast->print();
1202    }
1203    printf("\n");
1204 }
1205
1206
1207 ast_case_label_list::ast_case_label_list(void)
1208 {
1209 }
1210
1211
1212 void ast_case_statement::print(void) const
1213 {
1214    labels->print();
1215    foreach_list_const(n, & this->stmts) {
1216       ast_node *ast = exec_node_data(ast_node, n, link);
1217       ast->print();
1218       printf("\n");
1219    }
1220 }
1221
1222
1223 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1224 {
1225    this->labels = labels;
1226 }
1227
1228
1229 void ast_case_statement_list::print(void) const
1230 {
1231    foreach_list_const(n, & this->cases) {
1232       ast_node *ast = exec_node_data(ast_node, n, link);
1233       ast->print();
1234    }
1235 }
1236
1237
1238 ast_case_statement_list::ast_case_statement_list(void)
1239 {
1240 }
1241
1242
1243 void
1244 ast_iteration_statement::print(void) const
1245 {
1246    switch (mode) {
1247    case ast_for:
1248       printf("for( ");
1249       if (init_statement)
1250          init_statement->print();
1251       printf("; ");
1252
1253       if (condition)
1254          condition->print();
1255       printf("; ");
1256
1257       if (rest_expression)
1258          rest_expression->print();
1259       printf(") ");
1260
1261       body->print();
1262       break;
1263
1264    case ast_while:
1265       printf("while ( ");
1266       if (condition)
1267          condition->print();
1268       printf(") ");
1269       body->print();
1270       break;
1271
1272    case ast_do_while:
1273       printf("do ");
1274       body->print();
1275       printf("while ( ");
1276       if (condition)
1277          condition->print();
1278       printf("); ");
1279       break;
1280    }
1281 }
1282
1283
1284 ast_iteration_statement::ast_iteration_statement(int mode,
1285                                                  ast_node *init,
1286                                                  ast_node *condition,
1287                                                  ast_expression *rest_expression,
1288                                                  ast_node *body)
1289 {
1290    this->mode = ast_iteration_modes(mode);
1291    this->init_statement = init;
1292    this->condition = condition;
1293    this->rest_expression = rest_expression;
1294    this->body = body;
1295 }
1296
1297
1298 void
1299 ast_struct_specifier::print(void) const
1300 {
1301    printf("struct %s { ", name);
1302    foreach_list_const(n, &this->declarations) {
1303       ast_node *ast = exec_node_data(ast_node, n, link);
1304       ast->print();
1305    }
1306    printf("} ");
1307 }
1308
1309
1310 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1311                                            ast_declarator_list *declarator_list)
1312 {
1313    if (identifier == NULL) {
1314       static unsigned anon_count = 1;
1315       identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
1316       anon_count++;
1317    }
1318    name = identifier;
1319    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1320    is_declaration = true;
1321 }
1322
1323 static void
1324 set_shader_inout_layout(struct gl_shader *shader,
1325                      struct _mesa_glsl_parse_state *state)
1326 {
1327    if (shader->Stage != MESA_SHADER_GEOMETRY) {
1328       /* Should have been prevented by the parser. */
1329       assert(!state->gs_input_prim_type_specified);
1330       assert(!state->out_qualifier->flags.i);
1331       return;
1332    }
1333
1334    shader->Geom.VerticesOut = 0;
1335    if (state->out_qualifier->flags.q.max_vertices)
1336       shader->Geom.VerticesOut = state->out_qualifier->max_vertices;
1337
1338    if (state->gs_input_prim_type_specified) {
1339       shader->Geom.InputType = state->gs_input_prim_type;
1340    } else {
1341       shader->Geom.InputType = PRIM_UNKNOWN;
1342    }
1343
1344    if (state->out_qualifier->flags.q.prim_type) {
1345       shader->Geom.OutputType = state->out_qualifier->prim_type;
1346    } else {
1347       shader->Geom.OutputType = PRIM_UNKNOWN;
1348    }
1349 }
1350
1351 extern "C" {
1352
1353 void
1354 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1355                           bool dump_ast, bool dump_hir)
1356 {
1357    struct _mesa_glsl_parse_state *state =
1358       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1359    const char *source = shader->Source;
1360
1361    state->error = glcpp_preprocess(state, &source, &state->info_log,
1362                              &ctx->Extensions, ctx);
1363
1364    if (!state->error) {
1365      _mesa_glsl_lexer_ctor(state, source);
1366      _mesa_glsl_parse(state);
1367      _mesa_glsl_lexer_dtor(state);
1368    }
1369
1370    if (dump_ast) {
1371       foreach_list_const(n, &state->translation_unit) {
1372          ast_node *ast = exec_node_data(ast_node, n, link);
1373          ast->print();
1374       }
1375       printf("\n\n");
1376    }
1377
1378    ralloc_free(shader->ir);
1379    shader->ir = new(shader) exec_list;
1380    if (!state->error && !state->translation_unit.is_empty())
1381       _mesa_ast_to_hir(shader->ir, state);
1382
1383    if (!state->error) {
1384       validate_ir_tree(shader->ir);
1385
1386       /* Print out the unoptimized IR. */
1387       if (dump_hir) {
1388          _mesa_print_ir(shader->ir, state);
1389       }
1390    }
1391
1392
1393    if (!state->error && !shader->ir->is_empty()) {
1394       struct gl_shader_compiler_options *options =
1395          &ctx->ShaderCompilerOptions[shader->Stage];
1396
1397       /* Do some optimization at compile time to reduce shader IR size
1398        * and reduce later work if the same shader is linked multiple times
1399        */
1400       while (do_common_optimization(shader->ir, false, false, 32, options))
1401          ;
1402
1403       validate_ir_tree(shader->ir);
1404    }
1405
1406    if (shader->InfoLog)
1407       ralloc_free(shader->InfoLog);
1408
1409    shader->symbols = state->symbols;
1410    shader->CompileStatus = !state->error;
1411    shader->InfoLog = state->info_log;
1412    shader->Version = state->language_version;
1413    shader->IsES = state->es_shader;
1414    shader->uses_builtin_functions = state->uses_builtin_functions;
1415
1416    if (shader->UniformBlocks)
1417       ralloc_free(shader->UniformBlocks);
1418    shader->NumUniformBlocks = state->num_uniform_blocks;
1419    shader->UniformBlocks = state->uniform_blocks;
1420    ralloc_steal(shader, shader->UniformBlocks);
1421
1422    if (!state->error)
1423       set_shader_inout_layout(shader, state);
1424
1425    /* Retain any live IR, but trash the rest. */
1426    reparent_ir(shader->ir, shader->ir);
1427
1428    ralloc_free(state);
1429 }
1430
1431 } /* extern "C" */
1432 /**
1433  * Do the set of common optimizations passes
1434  *
1435  * \param ir                          List of instructions to be optimized
1436  * \param linked                      Is the shader linked?  This enables
1437  *                                    optimizations passes that remove code at
1438  *                                    global scope and could cause linking to
1439  *                                    fail.
1440  * \param uniform_locations_assigned  Have locations already been assigned for
1441  *                                    uniforms?  This prevents the declarations
1442  *                                    of unused uniforms from being removed.
1443  *                                    The setting of this flag only matters if
1444  *                                    \c linked is \c true.
1445  * \param max_unroll_iterations       Maximum number of loop iterations to be
1446  *                                    unrolled.  Setting to 0 disables loop
1447  *                                    unrolling.
1448  * \param options                     The driver's preferred shader options.
1449  */
1450 bool
1451 do_common_optimization(exec_list *ir, bool linked,
1452                        bool uniform_locations_assigned,
1453                        unsigned max_unroll_iterations,
1454                        const struct gl_shader_compiler_options *options)
1455 {
1456    GLboolean progress = GL_FALSE;
1457
1458    progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
1459
1460    if (linked) {
1461       progress = do_function_inlining(ir) || progress;
1462       progress = do_dead_functions(ir) || progress;
1463       progress = do_structure_splitting(ir) || progress;
1464    }
1465    progress = do_if_simplification(ir) || progress;
1466    progress = opt_flatten_nested_if_blocks(ir) || progress;
1467    progress = do_copy_propagation(ir) || progress;
1468    progress = do_copy_propagation_elements(ir) || progress;
1469
1470    if (options->OptimizeForAOS && !linked)
1471       progress = opt_flip_matrices(ir) || progress;
1472
1473    if (linked && options->OptimizeForAOS) {
1474       progress = do_vectorize(ir) || progress;
1475    }
1476
1477    if (linked)
1478       progress = do_dead_code(ir, uniform_locations_assigned) || progress;
1479    else
1480       progress = do_dead_code_unlinked(ir) || progress;
1481    progress = do_dead_code_local(ir) || progress;
1482    progress = do_tree_grafting(ir) || progress;
1483    progress = do_constant_propagation(ir) || progress;
1484    if (linked)
1485       progress = do_constant_variable(ir) || progress;
1486    else
1487       progress = do_constant_variable_unlinked(ir) || progress;
1488    progress = do_constant_folding(ir) || progress;
1489    progress = do_cse(ir) || progress;
1490    progress = do_algebraic(ir) || progress;
1491    progress = do_lower_jumps(ir) || progress;
1492    progress = do_vec_index_to_swizzle(ir) || progress;
1493    progress = lower_vector_insert(ir, false) || progress;
1494    progress = do_swizzle_swizzle(ir) || progress;
1495    progress = do_noop_swizzle(ir) || progress;
1496
1497    progress = optimize_split_arrays(ir, linked) || progress;
1498    progress = optimize_redundant_jumps(ir) || progress;
1499
1500    loop_state *ls = analyze_loop_variables(ir);
1501    if (ls->loop_found) {
1502       progress = set_loop_controls(ir, ls) || progress;
1503       progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
1504    }
1505    delete ls;
1506
1507    return progress;
1508 }
1509
1510 extern "C" {
1511
1512 /**
1513  * To be called at GL teardown time, this frees compiler datastructures.
1514  *
1515  * After calling this, any previously compiled shaders and shader
1516  * programs would be invalid.  So this should happen at approximately
1517  * program exit.
1518  */
1519 void
1520 _mesa_destroy_shader_compiler(void)
1521 {
1522    _mesa_destroy_shader_compiler_caches();
1523
1524    _mesa_glsl_release_types();
1525 }
1526
1527 /**
1528  * Releases compiler caches to trade off performance for memory.
1529  *
1530  * Intended to be used with glReleaseShaderCompiler().
1531  */
1532 void
1533 _mesa_destroy_shader_compiler_caches(void)
1534 {
1535    _mesa_glsl_release_builtin_functions();
1536 }
1537
1538 }