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