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 <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/context.h"
  30 #include "main/debug_output.h"
  31 #include "main/formats.h"
  32 #include "main/shaderobj.h"
  33 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  34 #include "util/ralloc.h"
  35 #include "util/disk_cache.h"
  36 #include "util/mesa-sha1.h"
  37 #include "ast.h"
  38 #include "glsl_parser_extras.h"
  39 #include "glsl_parser.h"
  40 #include "ir_optimization.h"
  41 #include "loop_analysis.h"
  42 #include "builtin_functions.h"
  43
  44 /**
  45  * Format a short human-readable description of the given GLSL version.
  46  */
  47 const char *
  48 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  49 {
  50    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  51                           version / 100, version % 100);
  52 }
  53
  54
  55 static const unsigned known_desktop_glsl_versions[] =
  56    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
  57 static const unsigned known_desktop_gl_versions[] =
  58    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  59
  60
  61 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  62                                                gl_shader_stage stage,
  63                                                void *mem_ctx)
  64    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  65      switch_state(), warnings_enabled(true)
  66 {
  67    assert(stage < MESA_SHADER_STAGES);
  68    this->stage = stage;
  69
  70    this->scanner = NULL;
  71    this->translation_unit.make_empty();
  72    this->symbols = new(mem_ctx) glsl_symbol_table;
  73
  74    this->linalloc = linear_alloc_parent(this, 0);
  75
  76    this->info_log = ralloc_strdup(mem_ctx, "");
  77    this->error = false;
  78    this->loop_nesting_ast = NULL;
  79
  80    this->uses_builtin_functions = false;
  81
  82    /* Set default language version and extensions */
  83    this->language_version = 110;
  84    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  85    if (ctx->Const.GLSLZeroInit == 1) {
  86       this->zero_init = (1u << ir_var_auto) | (1u << ir_var_temporary) | (1u << ir_var_shader_out);
  87    } else if (ctx->Const.GLSLZeroInit == 2) {
  88       this->zero_init = (1u << ir_var_auto) | (1u << ir_var_temporary) | (1u << ir_var_function_out);
  89    } else {
  90       this->zero_init = 0;
  91    }
  92    this->gl_version = 20;
  93    this->compat_shader = true;
  94    this->es_shader = false;
  95    this->ARB_texture_rectangle_enable = true;
  96
  97    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  98    if (ctx->API == API_OPENGLES2) {
  99       this->language_version = 100;
 100       this->es_shader = true;
 101       this->ARB_texture_rectangle_enable = false;
 102    }
 103
 104    this->extensions = &ctx->Extensions;
 105
 106    this->Const.MaxLights = ctx->Const.MaxLights;
 107    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 108    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 109    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 110    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 111    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 112    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 113    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 114    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 115    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 116    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 117    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 118
 119    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 120
 121    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 122
 123    /* 1.50 constants */
 124    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 125    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 126    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 127    this->Const.MaxGeometryShaderInvocations = ctx->Const.MaxGeometryShaderInvocations;
 128    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 129    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 130    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 131    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 132    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 133
 134    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 135    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 136    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 137    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 138    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 139    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 140    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 141    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 142    this->Const.MaxVertexAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 144    this->Const.MaxTessControlAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 146    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 148    this->Const.MaxGeometryAtomicCounterBuffers =
 149       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 150    this->Const.MaxFragmentAtomicCounterBuffers =
 151       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 152    this->Const.MaxComputeAtomicCounterBuffers =
 153       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 154    this->Const.MaxCombinedAtomicCounterBuffers =
 155       ctx->Const.MaxCombinedAtomicBuffers;
 156    this->Const.MaxAtomicCounterBufferSize =
 157       ctx->Const.MaxAtomicBufferSize;
 158
 159    /* ARB_enhanced_layouts constants */
 160    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 161    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 162
 163    /* Compute shader constants */
 164    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 165       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 166    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 167       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 168
 169    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 170    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 171
 172    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 173    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 174    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 175    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 176    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 177    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 178    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 179    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 180    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 181    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 182
 183    /* ARB_viewport_array */
 184    this->Const.MaxViewports = ctx->Const.MaxViewports;
 185
 186    /* tessellation shader constants */
 187    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 188    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 189    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 190    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 191    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 192    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 193    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 194    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 195    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 196    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 197    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 198    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 199
 200    /* GL 4.5 / OES_sample_variables */
 201    this->Const.MaxSamples = ctx->Const.MaxSamples;
 202
 203    this->current_function = NULL;
 204    this->toplevel_ir = NULL;
 205    this->found_return = false;
 206    this->found_begin_interlock = false;
 207    this->found_end_interlock = false;
 208    this->all_invariant = false;
 209    this->user_structures = NULL;
 210    this->num_user_structures = 0;
 211    this->num_subroutines = 0;
 212    this->subroutines = NULL;
 213    this->num_subroutine_types = 0;
 214    this->subroutine_types = NULL;
 215
 216    /* supported_versions should be large enough to support the known desktop
 217     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 218     */
 219    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 220                  ARRAY_SIZE(this->supported_versions));
 221
 222    /* Populate the list of supported GLSL versions */
 223    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 224     * the OpenGL 3.2 Core context is supported, this logic will need
 225     * change.  Older versions of GLSL are no longer supported
 226     * outside the compatibility contexts of 3.x.
 227     */
 228    this->num_supported_versions = 0;
 229    if (_mesa_is_desktop_gl(ctx)) {
 230       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 231          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 232             this->supported_versions[this->num_supported_versions].ver
 233                = known_desktop_glsl_versions[i];
 234             this->supported_versions[this->num_supported_versions].gl_ver
 235                = known_desktop_gl_versions[i];
 236             this->supported_versions[this->num_supported_versions].es = false;
 237             this->num_supported_versions++;
 238          }
 239       }
 240    }
 241    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 242       this->supported_versions[this->num_supported_versions].ver = 100;
 243       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 244       this->supported_versions[this->num_supported_versions].es = true;
 245       this->num_supported_versions++;
 246    }
 247    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 248       this->supported_versions[this->num_supported_versions].ver = 300;
 249       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 250       this->supported_versions[this->num_supported_versions].es = true;
 251       this->num_supported_versions++;
 252    }
 253    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 254       this->supported_versions[this->num_supported_versions].ver = 310;
 255       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 256       this->supported_versions[this->num_supported_versions].es = true;
 257       this->num_supported_versions++;
 258    }
 259    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 260        ctx->Extensions.ARB_ES3_2_compatibility) {
 261       this->supported_versions[this->num_supported_versions].ver = 320;
 262       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 263       this->supported_versions[this->num_supported_versions].es = true;
 264       this->num_supported_versions++;
 265    }
 266
 267    /* Create a string for use in error messages to tell the user which GLSL
 268     * versions are supported.
 269     */
 270    char *supported = ralloc_strdup(this, "");
 271    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 272       unsigned ver = this->supported_versions[i].ver;
 273       const char *const prefix = (i == 0)
 274          ? ""
 275          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 276       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 277
 278       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 279                              prefix,
 280                              ver / 100, ver % 100,
 281                              suffix);
 282    }
 283
 284    this->supported_version_string = supported;
 285
 286    if (ctx->Const.ForceGLSLExtensionsWarn)
 287       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 288
 289    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 290    this->default_uniform_qualifier->flags.q.shared = 1;
 291    this->default_uniform_qualifier->flags.q.column_major = 1;
 292
 293    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 294    this->default_shader_storage_qualifier->flags.q.shared = 1;
 295    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 296
 297    this->fs_uses_gl_fragcoord = false;
 298    this->fs_redeclares_gl_fragcoord = false;
 299    this->fs_origin_upper_left = false;
 300    this->fs_pixel_center_integer = false;
 301    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 302
 303    this->gs_input_prim_type_specified = false;
 304    this->tcs_output_vertices_specified = false;
 305    this->gs_input_size = 0;
 306    this->in_qualifier = new(this) ast_type_qualifier();
 307    this->out_qualifier = new(this) ast_type_qualifier();
 308    this->fs_early_fragment_tests = false;
 309    this->fs_inner_coverage = false;
 310    this->fs_post_depth_coverage = false;
 311    this->fs_pixel_interlock_ordered = false;
 312    this->fs_pixel_interlock_unordered = false;
 313    this->fs_sample_interlock_ordered = false;
 314    this->fs_sample_interlock_unordered = false;
 315    this->fs_blend_support = 0;
 316    memset(this->atomic_counter_offsets, 0,
 317           sizeof(this->atomic_counter_offsets));
 318    this->allow_extension_directive_midshader =
 319       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 320    this->allow_glsl_120_subset_in_110 =
 321       ctx->Const.AllowGLSL120SubsetIn110;
 322    this->allow_builtin_variable_redeclaration =
 323       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 324    this->allow_layout_qualifier_on_function_parameter =
 325       ctx->Const.AllowLayoutQualifiersOnFunctionParameters;
 326
 327    this->cs_input_local_size_variable_specified = false;
 328
 329    /* ARB_bindless_texture */
 330    this->bindless_sampler_specified = false;
 331    this->bindless_image_specified = false;
 332    this->bound_sampler_specified = false;
 333    this->bound_image_specified = false;
 334 }
 335
 336 /**
 337  * Determine whether the current GLSL version is sufficiently high to support
 338  * a certain feature, and generate an error message if it isn't.
 339  *
 340  * \param required_glsl_version and \c required_glsl_es_version are
 341  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 342  *
 343  * \param locp is the parser location where the error should be reported.
 344  *
 345  * \param fmt (and additional arguments) constitute a printf-style error
 346  * message to report if the version check fails.  Information about the
 347  * current and required GLSL versions will be appended.  So, for example, if
 348  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 349  * "foo unsupported") is called, the error message will be "foo unsupported in
 350  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 351  */
 352 bool
 353 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 354                                       unsigned required_glsl_es_version,
 355                                       YYLTYPE *locp, const char *fmt, ...)
 356 {
 357    if (this->is_version(required_glsl_version, required_glsl_es_version))
 358       return true;
 359
 360    va_list args;
 361    va_start(args, fmt);
 362    char *problem = ralloc_vasprintf(this, fmt, args);
 363    va_end(args);
 364    const char *glsl_version_string
 365       = glsl_compute_version_string(this, false, required_glsl_version);
 366    const char *glsl_es_version_string
 367       = glsl_compute_version_string(this, true, required_glsl_es_version);
 368    const char *requirement_string = "";
 369    if (required_glsl_version && required_glsl_es_version) {
 370       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 371                                            glsl_version_string,
 372                                            glsl_es_version_string);
 373    } else if (required_glsl_version) {
 374       requirement_string = ralloc_asprintf(this, " (%s required)",
 375                                            glsl_version_string);
 376    } else if (required_glsl_es_version) {
 377       requirement_string = ralloc_asprintf(this, " (%s required)",
 378                                            glsl_es_version_string);
 379    }
 380    _mesa_glsl_error(locp, this, "%s in %s%s",
 381                     problem, this->get_version_string(),
 382                     requirement_string);
 383
 384    return false;
 385 }
 386
 387 /**
 388  * Process a GLSL #version directive.
 389  *
 390  * \param version is the integer that follows the #version token.
 391  *
 392  * \param ident is a string identifier that follows the integer, if any is
 393  * present.  Otherwise NULL.
 394  */
 395 void
 396 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 397                                                   const char *ident)
 398 {
 399    bool es_token_present = false;
 400    bool compat_token_present = false;
 401    if (ident) {
 402       if (strcmp(ident, "es") == 0) {
 403          es_token_present = true;
 404       } else if (version >= 150) {
 405          if (strcmp(ident, "core") == 0) {
 406             /* Accept the token.  There's no need to record that this is
 407              * a core profile shader since that's the only profile we support.
 408              */
 409          } else if (strcmp(ident, "compatibility") == 0) {
 410             compat_token_present = true;
 411
 412             if (this->ctx->API != API_OPENGL_COMPAT) {
 413                _mesa_glsl_error(locp, this,
 414                                 "the compatibility profile is not supported");
 415             }
 416          } else {
 417             _mesa_glsl_error(locp, this,
 418                              "\"%s\" is not a valid shading language profile; "
 419                              "if present, it must be \"core\"", ident);
 420          }
 421       } else {
 422          _mesa_glsl_error(locp, this,
 423                           "illegal text following version number");
 424       }
 425    }
 426
 427    this->es_shader = es_token_present;
 428    if (version == 100) {
 429       if (es_token_present) {
 430          _mesa_glsl_error(locp, this,
 431                           "GLSL 1.00 ES should be selected using "
 432                           "`#version 100'");
 433       } else {
 434          this->es_shader = true;
 435       }
 436    }
 437
 438    if (this->es_shader) {
 439       this->ARB_texture_rectangle_enable = false;
 440    }
 441
 442    if (this->forced_language_version)
 443       this->language_version = this->forced_language_version;
 444    else
 445       this->language_version = version;
 446
 447    this->compat_shader = compat_token_present ||
 448                          (this->ctx->API == API_OPENGL_COMPAT &&
 449                           this->language_version == 140) ||
 450                          (!this->es_shader && this->language_version < 140);
 451
 452    bool supported = false;
 453    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 454       if (this->supported_versions[i].ver == this->language_version
 455           && this->supported_versions[i].es == this->es_shader) {
 456          this->gl_version = this->supported_versions[i].gl_ver;
 457          supported = true;
 458          break;
 459       }
 460    }
 461
 462    if (!supported) {
 463       _mesa_glsl_error(locp, this, "%s is not supported. "
 464                        "Supported versions are: %s",
 465                        this->get_version_string(),
 466                        this->supported_version_string);
 467
 468       /* On exit, the language_version must be set to a valid value.
 469        * Later calls to _mesa_glsl_initialize_types will misbehave if
 470        * the version is invalid.
 471        */
 472       switch (this->ctx->API) {
 473       case API_OPENGL_COMPAT:
 474       case API_OPENGL_CORE:
 475          this->language_version = this->ctx->Const.GLSLVersion;
 476          break;
 477
 478       case API_OPENGLES:
 479          assert(!"Should not get here.");
 480          /* FALLTHROUGH */
 481
 482       case API_OPENGLES2:
 483          this->language_version = 100;
 484          break;
 485       }
 486    }
 487 }
 488
 489
 490 /* This helper function will append the given message to the shader's
 491    info log and report it via GL_ARB_debug_output. Per that extension,
 492    'type' is one of the enum values classifying the message, and
 493    'id' is the implementation-defined ID of the given message. */
 494 static void
 495 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 496                GLenum type, const char *fmt, va_list ap)
 497 {
 498    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 499    GLuint msg_id = 0;
 500
 501    assert(state->info_log != NULL);
 502
 503    /* Get the offset that the new message will be written to. */
 504    int msg_offset = strlen(state->info_log);
 505
 506    if (locp->path) {
 507       ralloc_asprintf_append(&state->info_log, "\"%s\"", locp->path);
 508    } else {
 509       ralloc_asprintf_append(&state->info_log, "%u", locp->source);
 510    }
 511    ralloc_asprintf_append(&state->info_log, ":%u(%u): %s: ",
 512                           locp->first_line, locp->first_column,
 513                           error ? "error" : "warning");
 514
 515    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 516
 517    const char *const msg = &state->info_log[msg_offset];
 518    struct gl_context *ctx = state->ctx;
 519
 520    /* Report the error via GL_ARB_debug_output. */
 521    _mesa_shader_debug(ctx, type, &msg_id, msg);
 522
 523    ralloc_strcat(&state->info_log, "\n");
 524 }
 525
 526 void
 527 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 528                  const char *fmt, ...)
 529 {
 530    va_list ap;
 531
 532    state->error = true;
 533
 534    va_start(ap, fmt);
 535    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 536    va_end(ap);
 537 }
 538
 539
 540 void
 541 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 542                    const char *fmt, ...)
 543 {
 544    if (state->warnings_enabled) {
 545       va_list ap;
 546
 547       va_start(ap, fmt);
 548       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 549       va_end(ap);
 550    }
 551 }
 552
 553
 554 /**
 555  * Enum representing the possible behaviors that can be specified in
 556  * an #extension directive.
 557  */
 558 enum ext_behavior {
 559    extension_disable,
 560    extension_enable,
 561    extension_require,
 562    extension_warn
 563 };
 564
 565 /**
 566  * Element type for _mesa_glsl_supported_extensions
 567  */
 568 struct _mesa_glsl_extension {
 569    /**
 570     * Name of the extension when referred to in a GLSL extension
 571     * statement
 572     */
 573    const char *name;
 574
 575    /**
 576     * Whether this extension is a part of AEP
 577     */
 578    bool aep;
 579
 580    /**
 581     * Predicate that checks whether the relevant extension is available for
 582     * this context.
 583     */
 584    bool (*available_pred)(const struct gl_context *,
 585                           gl_api api, uint8_t version);
 586
 587    /**
 588     * Flag in the _mesa_glsl_parse_state struct that should be set
 589     * when this extension is enabled.
 590     *
 591     * See note in _mesa_glsl_extension::supported_flag about "pointer
 592     * to member" types.
 593     */
 594    bool _mesa_glsl_parse_state::* enable_flag;
 595
 596    /**
 597     * Flag in the _mesa_glsl_parse_state struct that should be set
 598     * when the shader requests "warn" behavior for this extension.
 599     *
 600     * See note in _mesa_glsl_extension::supported_flag about "pointer
 601     * to member" types.
 602     */
 603    bool _mesa_glsl_parse_state::* warn_flag;
 604
 605
 606    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 607                               gl_api api, uint8_t gl_version) const;
 608    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 609 };
 610
 611 /** Checks if the context supports a user-facing extension */
 612 #define EXT(name_str, driver_cap, ...) \
 613 static UNUSED bool \
 614 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 615 { \
 616    return ctx->Extensions.driver_cap && (version >= \
 617           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 618 }
 619 #include "main/extensions_table.h"
 620 #undef EXT
 621
 622 #define EXT(NAME)                                           \
 623    { "GL_" #NAME, false, has_##NAME,                        \
 624      &_mesa_glsl_parse_state::NAME##_enable,                \
 625      &_mesa_glsl_parse_state::NAME##_warn }
 626
 627 #define EXT_AEP(NAME)                                       \
 628    { "GL_" #NAME, true, has_##NAME,                         \
 629      &_mesa_glsl_parse_state::NAME##_enable,                \
 630      &_mesa_glsl_parse_state::NAME##_warn }
 631
 632 /**
 633  * Table of extensions that can be enabled/disabled within a shader,
 634  * and the conditions under which they are supported.
 635  */
 636 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 637    /* ARB extensions go here, sorted alphabetically.
 638     */
 639    EXT(ARB_ES3_1_compatibility),
 640    EXT(ARB_ES3_2_compatibility),
 641    EXT(ARB_arrays_of_arrays),
 642    EXT(ARB_bindless_texture),
 643    EXT(ARB_compatibility),
 644    EXT(ARB_compute_shader),
 645    EXT(ARB_compute_variable_group_size),
 646    EXT(ARB_conservative_depth),
 647    EXT(ARB_cull_distance),
 648    EXT(ARB_derivative_control),
 649    EXT(ARB_draw_buffers),
 650    EXT(ARB_draw_instanced),
 651    EXT(ARB_enhanced_layouts),
 652    EXT(ARB_explicit_attrib_location),
 653    EXT(ARB_explicit_uniform_location),
 654    EXT(ARB_fragment_coord_conventions),
 655    EXT(ARB_fragment_layer_viewport),
 656    EXT(ARB_fragment_shader_interlock),
 657    EXT(ARB_gpu_shader5),
 658    EXT(ARB_gpu_shader_fp64),
 659    EXT(ARB_gpu_shader_int64),
 660    EXT(ARB_post_depth_coverage),
 661    EXT(ARB_sample_shading),
 662    EXT(ARB_separate_shader_objects),
 663    EXT(ARB_shader_atomic_counter_ops),
 664    EXT(ARB_shader_atomic_counters),
 665    EXT(ARB_shader_ballot),
 666    EXT(ARB_shader_bit_encoding),
 667    EXT(ARB_shader_clock),
 668    EXT(ARB_shader_draw_parameters),
 669    EXT(ARB_shader_group_vote),
 670    EXT(ARB_shader_image_load_store),
 671    EXT(ARB_shader_image_size),
 672    EXT(ARB_shader_precision),
 673    EXT(ARB_shader_stencil_export),
 674    EXT(ARB_shader_storage_buffer_object),
 675    EXT(ARB_shader_subroutine),
 676    EXT(ARB_shader_texture_image_samples),
 677    EXT(ARB_shader_texture_lod),
 678    EXT(ARB_shader_viewport_layer_array),
 679    EXT(ARB_shading_language_420pack),
 680    EXT(ARB_shading_language_include),
 681    EXT(ARB_shading_language_packing),
 682    EXT(ARB_tessellation_shader),
 683    EXT(ARB_texture_cube_map_array),
 684    EXT(ARB_texture_gather),
 685    EXT(ARB_texture_multisample),
 686    EXT(ARB_texture_query_levels),
 687    EXT(ARB_texture_query_lod),
 688    EXT(ARB_texture_rectangle),
 689    EXT(ARB_uniform_buffer_object),
 690    EXT(ARB_vertex_attrib_64bit),
 691    EXT(ARB_viewport_array),
 692
 693    /* KHR extensions go here, sorted alphabetically.
 694     */
 695    EXT_AEP(KHR_blend_equation_advanced),
 696
 697    /* OES extensions go here, sorted alphabetically.
 698     */
 699    EXT(OES_EGL_image_external),
 700    EXT(OES_EGL_image_external_essl3),
 701    EXT(OES_geometry_point_size),
 702    EXT(OES_geometry_shader),
 703    EXT(OES_gpu_shader5),
 704    EXT(OES_primitive_bounding_box),
 705    EXT_AEP(OES_sample_variables),
 706    EXT_AEP(OES_shader_image_atomic),
 707    EXT(OES_shader_io_blocks),
 708    EXT_AEP(OES_shader_multisample_interpolation),
 709    EXT(OES_standard_derivatives),
 710    EXT(OES_tessellation_point_size),
 711    EXT(OES_tessellation_shader),
 712    EXT(OES_texture_3D),
 713    EXT(OES_texture_buffer),
 714    EXT(OES_texture_cube_map_array),
 715    EXT_AEP(OES_texture_storage_multisample_2d_array),
 716    EXT(OES_viewport_array),
 717
 718    /* All other extensions go here, sorted alphabetically.
 719     */
 720    EXT(AMD_conservative_depth),
 721    EXT(AMD_gpu_shader_int64),
 722    EXT(AMD_shader_stencil_export),
 723    EXT(AMD_shader_trinary_minmax),
 724    EXT(AMD_texture_texture4),
 725    EXT(AMD_vertex_shader_layer),
 726    EXT(AMD_vertex_shader_viewport_index),
 727    EXT(ANDROID_extension_pack_es31a),
 728    EXT(EXT_blend_func_extended),
 729    EXT(EXT_demote_to_helper_invocation),
 730    EXT(EXT_frag_depth),
 731    EXT(EXT_draw_buffers),
 732    EXT(EXT_draw_instanced),
 733    EXT(EXT_clip_cull_distance),
 734    EXT(EXT_geometry_point_size),
 735    EXT_AEP(EXT_geometry_shader),
 736    EXT(EXT_gpu_shader4),
 737    EXT_AEP(EXT_gpu_shader5),
 738    EXT_AEP(EXT_primitive_bounding_box),
 739    EXT(EXT_separate_shader_objects),
 740    EXT(EXT_shader_framebuffer_fetch),
 741    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 742    EXT(EXT_shader_group_vote),
 743    EXT(EXT_shader_image_load_formatted),
 744    EXT(EXT_shader_image_load_store),
 745    EXT(EXT_shader_implicit_conversions),
 746    EXT(EXT_shader_integer_mix),
 747    EXT_AEP(EXT_shader_io_blocks),
 748    EXT(EXT_shader_samples_identical),
 749    EXT(EXT_tessellation_point_size),
 750    EXT_AEP(EXT_tessellation_shader),
 751    EXT(EXT_texture_array),
 752    EXT_AEP(EXT_texture_buffer),
 753    EXT_AEP(EXT_texture_cube_map_array),
 754    EXT(EXT_texture_query_lod),
 755    EXT(EXT_texture_shadow_lod),
 756    EXT(INTEL_conservative_rasterization),
 757    EXT(INTEL_shader_atomic_float_minmax),
 758    EXT(INTEL_shader_integer_functions2),
 759    EXT(MESA_shader_integer_functions),
 760    EXT(NV_compute_shader_derivatives),
 761    EXT(NV_fragment_shader_interlock),
 762    EXT(NV_image_formats),
 763    EXT(NV_shader_atomic_float),
 764    EXT(NV_viewport_array2),
 765 };
 766
 767 #undef EXT
 768
 769
 770 /**
 771  * Determine whether a given extension is compatible with the target,
 772  * API, and extension information in the current parser state.
 773  */
 774 bool _mesa_glsl_extension::compatible_with_state(
 775       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 776 {
 777    return this->available_pred(state->ctx, api, gl_version);
 778 }
 779
 780 /**
 781  * Set the appropriate flags in the parser state to establish the
 782  * given behavior for this extension.
 783  */
 784 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 785                                      ext_behavior behavior) const
 786 {
 787    /* Note: the ->* operator indexes into state by the
 788     * offsets this->enable_flag and this->warn_flag.  See
 789     * _mesa_glsl_extension::supported_flag for more info.
 790     */
 791    state->*(this->enable_flag) = (behavior != extension_disable);
 792    state->*(this->warn_flag)   = (behavior == extension_warn);
 793 }
 794
 795 /**
 796  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 797  * the name is not found, return NULL.
 798  */
 799 static const _mesa_glsl_extension *find_extension(const char *name)
 800 {
 801    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 802       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 803          return &_mesa_glsl_supported_extensions[i];
 804       }
 805    }
 806    return NULL;
 807 }
 808
 809 bool
 810 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 811                              const char *behavior_string, YYLTYPE *behavior_locp,
 812                              _mesa_glsl_parse_state *state)
 813 {
 814    uint8_t gl_version = state->ctx->Extensions.Version;
 815    gl_api api = state->ctx->API;
 816    ext_behavior behavior;
 817    if (strcmp(behavior_string, "warn") == 0) {
 818       behavior = extension_warn;
 819    } else if (strcmp(behavior_string, "require") == 0) {
 820       behavior = extension_require;
 821    } else if (strcmp(behavior_string, "enable") == 0) {
 822       behavior = extension_enable;
 823    } else if (strcmp(behavior_string, "disable") == 0) {
 824       behavior = extension_disable;
 825    } else {
 826       _mesa_glsl_error(behavior_locp, state,
 827                        "unknown extension behavior `%s'",
 828                        behavior_string);
 829       return false;
 830    }
 831
 832    /* If we're in a desktop context but with an ES shader, use an ES API enum
 833     * to verify extension availability.
 834     */
 835    if (state->es_shader && api != API_OPENGLES2)
 836       api = API_OPENGLES2;
 837    /* Use the language-version derived GL version to extension checks, unless
 838     * we're using meta, which sets the version to the max.
 839     */
 840    if (gl_version != 0xff)
 841       gl_version = state->gl_version;
 842
 843    if (strcmp(name, "all") == 0) {
 844       if ((behavior == extension_enable) || (behavior == extension_require)) {
 845          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 846                           (behavior == extension_enable)
 847                           ? "enable" : "require");
 848          return false;
 849       } else {
 850          for (unsigned i = 0;
 851               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 852             const _mesa_glsl_extension *extension
 853                = &_mesa_glsl_supported_extensions[i];
 854             if (extension->compatible_with_state(state, api, gl_version)) {
 855                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 856             }
 857          }
 858       }
 859    } else {
 860       const _mesa_glsl_extension *extension = find_extension(name);
 861       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 862          extension->set_flags(state, behavior);
 863          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 864             for (unsigned i = 0;
 865                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 866                const _mesa_glsl_extension *extension =
 867                   &_mesa_glsl_supported_extensions[i];
 868
 869                if (!extension->aep)
 870                   continue;
 871                /* AEP should not be enabled if all of the sub-extensions can't
 872                 * also be enabled. This is not the proper layer to do such
 873                 * error-checking though.
 874                 */
 875                assert(extension->compatible_with_state(state, api, gl_version));
 876                extension->set_flags(state, behavior);
 877             }
 878          }
 879       } else {
 880          static const char fmt[] = "extension `%s' unsupported in %s shader";
 881
 882          if (behavior == extension_require) {
 883             _mesa_glsl_error(name_locp, state, fmt,
 884                              name, _mesa_shader_stage_to_string(state->stage));
 885             return false;
 886          } else {
 887             _mesa_glsl_warning(name_locp, state, fmt,
 888                                name, _mesa_shader_stage_to_string(state->stage));
 889          }
 890       }
 891    }
 892
 893    return true;
 894 }
 895
 896
 897 /**
 898  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 899  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 900  * (process_array_constructor, et al) sufficient information to do type
 901  * checking.
 902  *
 903  * Operates on assignments involving an aggregate initializer. E.g.,
 904  *
 905  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 906  *
 907  * or more ridiculously,
 908  *
 909  * struct S {
 910  *     vec4 v[2];
 911  * };
 912  *
 913  * struct {
 914  *     S a[2], b;
 915  *     int c;
 916  * } aggregate = {
 917  *     {
 918  *         {
 919  *             {
 920  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 921  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 922  *             } // a[0].v
 923  *         }, // a[0]
 924  *         {
 925  *             {
 926  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 927  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 928  *             } // a[1].v
 929  *         } // a[1]
 930  *     }, // a
 931  *     {
 932  *         {
 933  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 934  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 935  *         } // b.v
 936  *     }, // b
 937  *     4 // c
 938  * };
 939  *
 940  * This pass is necessary because the right-hand side of <type> e = { ... }
 941  * doesn't contain sufficient information to determine if the types match.
 942  */
 943 void
 944 _mesa_ast_set_aggregate_type(const glsl_type *type,
 945                              ast_expression *expr)
 946 {
 947    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 948    ai->constructor_type = type;
 949
 950    /* If the aggregate is an array, recursively set its elements' types. */
 951    if (type->is_array()) {
 952       /* Each array element has the type type->fields.array.
 953        *
 954        * E.g., if <type> if struct S[2] we want to set each element's type to
 955        * struct S.
 956        */
 957       for (exec_node *expr_node = ai->expressions.get_head_raw();
 958            !expr_node->is_tail_sentinel();
 959            expr_node = expr_node->next) {
 960          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 961                                                link);
 962
 963          if (expr->oper == ast_aggregate)
 964             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 965       }
 966
 967    /* If the aggregate is a struct, recursively set its fields' types. */
 968    } else if (type->is_struct()) {
 969       exec_node *expr_node = ai->expressions.get_head_raw();
 970
 971       /* Iterate through the struct's fields. */
 972       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 973            i++, expr_node = expr_node->next) {
 974          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 975                                                link);
 976
 977          if (expr->oper == ast_aggregate) {
 978             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 979          }
 980       }
 981    /* If the aggregate is a matrix, set its columns' types. */
 982    } else if (type->is_matrix()) {
 983       for (exec_node *expr_node = ai->expressions.get_head_raw();
 984            !expr_node->is_tail_sentinel();
 985            expr_node = expr_node->next) {
 986          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 987                                                link);
 988
 989          if (expr->oper == ast_aggregate)
 990             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 991       }
 992    }
 993 }
 994
 995 void
 996 _mesa_ast_process_interface_block(YYLTYPE *locp,
 997                                   _mesa_glsl_parse_state *state,
 998                                   ast_interface_block *const block,
 999                                   const struct ast_type_qualifier &q)
1000 {
1001    if (q.flags.q.buffer) {
1002       if (!state->has_shader_storage_buffer_objects()) {
1003          _mesa_glsl_error(locp, state,
1004                           "#version 430 / GL_ARB_shader_storage_buffer_object "
1005                           "required for defining shader storage blocks");
1006       } else if (state->ARB_shader_storage_buffer_object_warn) {
1007          _mesa_glsl_warning(locp, state,
1008                             "#version 430 / GL_ARB_shader_storage_buffer_object "
1009                             "required for defining shader storage blocks");
1010       }
1011    } else if (q.flags.q.uniform) {
1012       if (!state->has_uniform_buffer_objects()) {
1013          _mesa_glsl_error(locp, state,
1014                           "#version 140 / GL_ARB_uniform_buffer_object "
1015                           "required for defining uniform blocks");
1016       } else if (state->ARB_uniform_buffer_object_warn) {
1017          _mesa_glsl_warning(locp, state,
1018                             "#version 140 / GL_ARB_uniform_buffer_object "
1019                             "required for defining uniform blocks");
1020       }
1021    } else {
1022       if (!state->has_shader_io_blocks()) {
1023          if (state->es_shader) {
1024             _mesa_glsl_error(locp, state,
1025                              "GL_OES_shader_io_blocks or #version 320 "
1026                              "required for using interface blocks");
1027          } else {
1028             _mesa_glsl_error(locp, state,
1029                              "#version 150 required for using "
1030                              "interface blocks");
1031          }
1032       }
1033    }
1034
1035    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1036     * "It is illegal to have an input block in a vertex shader
1037     *  or an output block in a fragment shader"
1038     */
1039    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1040       _mesa_glsl_error(locp, state,
1041                        "`in' interface block is not allowed for "
1042                        "a vertex shader");
1043    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1044       _mesa_glsl_error(locp, state,
1045                        "`out' interface block is not allowed for "
1046                        "a fragment shader");
1047    }
1048
1049    /* Since block arrays require names, and both features are added in
1050     * the same language versions, we don't have to explicitly
1051     * version-check both things.
1052     */
1053    if (block->instance_name != NULL) {
1054       state->check_version(150, 300, locp, "interface blocks with "
1055                            "an instance name are not allowed");
1056    }
1057
1058    ast_type_qualifier::bitset_t interface_type_mask;
1059    struct ast_type_qualifier temp_type_qualifier;
1060
1061    /* Get a bitmask containing only the in/out/uniform/buffer
1062     * flags, allowing us to ignore other irrelevant flags like
1063     * interpolation qualifiers.
1064     */
1065    temp_type_qualifier.flags.i = 0;
1066    temp_type_qualifier.flags.q.uniform = true;
1067    temp_type_qualifier.flags.q.in = true;
1068    temp_type_qualifier.flags.q.out = true;
1069    temp_type_qualifier.flags.q.buffer = true;
1070    temp_type_qualifier.flags.q.patch = true;
1071    interface_type_mask = temp_type_qualifier.flags.i;
1072
1073    /* Get the block's interface qualifier.  The interface_qualifier
1074     * production rule guarantees that only one bit will be set (and
1075     * it will be in/out/uniform).
1076     */
1077    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1078
1079    block->default_layout.flags.i |= block_interface_qualifier;
1080
1081    if (state->stage == MESA_SHADER_GEOMETRY &&
1082        state->has_explicit_attrib_stream() &&
1083        block->default_layout.flags.q.out) {
1084       /* Assign global layout's stream value. */
1085       block->default_layout.flags.q.stream = 1;
1086       block->default_layout.flags.q.explicit_stream = 0;
1087       block->default_layout.stream = state->out_qualifier->stream;
1088    }
1089
1090    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1091       /* Assign global layout's xfb_buffer value. */
1092       block->default_layout.flags.q.xfb_buffer = 1;
1093       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1094       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1095    }
1096
1097    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1098       ast_type_qualifier& qualifier = member->type->qualifier;
1099       if ((qualifier.flags.i & interface_type_mask) == 0) {
1100          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1101           * "If no optional qualifier is used in a member declaration, the
1102           *  qualifier of the variable is just in, out, or uniform as declared
1103           *  by interface-qualifier."
1104           */
1105          qualifier.flags.i |= block_interface_qualifier;
1106       } else if ((qualifier.flags.i & interface_type_mask) !=
1107                  block_interface_qualifier) {
1108          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1109           * "If optional qualifiers are used, they can include interpolation
1110           *  and storage qualifiers and they must declare an input, output,
1111           *  or uniform variable consistent with the interface qualifier of
1112           *  the block."
1113           */
1114          _mesa_glsl_error(locp, state,
1115                           "uniform/in/out qualifier on "
1116                           "interface block member does not match "
1117                           "the interface block");
1118       }
1119
1120       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1121          _mesa_glsl_error(locp, state,
1122                           "invariant qualifiers can be used only "
1123                           "in interface block members for shader "
1124                           "inputs or outputs");
1125    }
1126 }
1127
1128 static void
1129 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1130 {
1131    if (q->is_subroutine_decl())
1132       printf("subroutine ");
1133
1134    if (q->subroutine_list) {
1135       printf("subroutine (");
1136       q->subroutine_list->print();
1137       printf(")");
1138    }
1139
1140    if (q->flags.q.constant)
1141       printf("const ");
1142
1143    if (q->flags.q.invariant)
1144       printf("invariant ");
1145
1146    if (q->flags.q.attribute)
1147       printf("attribute ");
1148
1149    if (q->flags.q.varying)
1150       printf("varying ");
1151
1152    if (q->flags.q.in && q->flags.q.out)
1153       printf("inout ");
1154    else {
1155       if (q->flags.q.in)
1156          printf("in ");
1157
1158       if (q->flags.q.out)
1159          printf("out ");
1160    }
1161
1162    if (q->flags.q.centroid)
1163       printf("centroid ");
1164    if (q->flags.q.sample)
1165       printf("sample ");
1166    if (q->flags.q.patch)
1167       printf("patch ");
1168    if (q->flags.q.uniform)
1169       printf("uniform ");
1170    if (q->flags.q.buffer)
1171       printf("buffer ");
1172    if (q->flags.q.smooth)
1173       printf("smooth ");
1174    if (q->flags.q.flat)
1175       printf("flat ");
1176    if (q->flags.q.noperspective)
1177       printf("noperspective ");
1178 }
1179
1180
1181 void
1182 ast_node::print(void) const
1183 {
1184    printf("unhandled node ");
1185 }
1186
1187
1188 ast_node::ast_node(void)
1189 {
1190    this->location.source = 0;
1191    this->location.first_line = 0;
1192    this->location.first_column = 0;
1193    this->location.last_line = 0;
1194    this->location.last_column = 0;
1195 }
1196
1197
1198 static void
1199 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1200 {
1201    if (array_specifier)
1202       array_specifier->print();
1203 }
1204
1205
1206 void
1207 ast_compound_statement::print(void) const
1208 {
1209    printf("{\n");
1210
1211    foreach_list_typed(ast_node, ast, link, &this->statements) {
1212       ast->print();
1213    }
1214
1215    printf("}\n");
1216 }
1217
1218
1219 ast_compound_statement::ast_compound_statement(int new_scope,
1220                                                ast_node *statements)
1221 {
1222    this->new_scope = new_scope;
1223
1224    if (statements != NULL) {
1225       this->statements.push_degenerate_list_at_head(&statements->link);
1226    }
1227 }
1228
1229
1230 void
1231 ast_expression::print(void) const
1232 {
1233    switch (oper) {
1234    case ast_assign:
1235    case ast_mul_assign:
1236    case ast_div_assign:
1237    case ast_mod_assign:
1238    case ast_add_assign:
1239    case ast_sub_assign:
1240    case ast_ls_assign:
1241    case ast_rs_assign:
1242    case ast_and_assign:
1243    case ast_xor_assign:
1244    case ast_or_assign:
1245       subexpressions[0]->print();
1246       printf("%s ", operator_string(oper));
1247       subexpressions[1]->print();
1248       break;
1249
1250    case ast_field_selection:
1251       subexpressions[0]->print();
1252       printf(". %s ", primary_expression.identifier);
1253       break;
1254
1255    case ast_plus:
1256    case ast_neg:
1257    case ast_bit_not:
1258    case ast_logic_not:
1259    case ast_pre_inc:
1260    case ast_pre_dec:
1261       printf("%s ", operator_string(oper));
1262       subexpressions[0]->print();
1263       break;
1264
1265    case ast_post_inc:
1266    case ast_post_dec:
1267       subexpressions[0]->print();
1268       printf("%s ", operator_string(oper));
1269       break;
1270
1271    case ast_conditional:
1272       subexpressions[0]->print();
1273       printf("? ");
1274       subexpressions[1]->print();
1275       printf(": ");
1276       subexpressions[2]->print();
1277       break;
1278
1279    case ast_array_index:
1280       subexpressions[0]->print();
1281       printf("[ ");
1282       subexpressions[1]->print();
1283       printf("] ");
1284       break;
1285
1286    case ast_function_call: {
1287       subexpressions[0]->print();
1288       printf("( ");
1289
1290       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1291          if (&ast->link != this->expressions.get_head())
1292             printf(", ");
1293
1294          ast->print();
1295       }
1296
1297       printf(") ");
1298       break;
1299    }
1300
1301    case ast_identifier:
1302       printf("%s ", primary_expression.identifier);
1303       break;
1304
1305    case ast_int_constant:
1306       printf("%d ", primary_expression.int_constant);
1307       break;
1308
1309    case ast_uint_constant:
1310       printf("%u ", primary_expression.uint_constant);
1311       break;
1312
1313    case ast_float_constant:
1314       printf("%f ", primary_expression.float_constant);
1315       break;
1316
1317    case ast_double_constant:
1318       printf("%f ", primary_expression.double_constant);
1319       break;
1320
1321    case ast_int64_constant:
1322       printf("%" PRId64 " ", primary_expression.int64_constant);
1323       break;
1324
1325    case ast_uint64_constant:
1326       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1327       break;
1328
1329    case ast_bool_constant:
1330       printf("%s ",
1331              primary_expression.bool_constant
1332              ? "true" : "false");
1333       break;
1334
1335    case ast_sequence: {
1336       printf("( ");
1337       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1338          if (&ast->link != this->expressions.get_head())
1339             printf(", ");
1340
1341          ast->print();
1342       }
1343       printf(") ");
1344       break;
1345    }
1346
1347    case ast_aggregate: {
1348       printf("{ ");
1349       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1350          if (&ast->link != this->expressions.get_head())
1351             printf(", ");
1352
1353          ast->print();
1354       }
1355       printf("} ");
1356       break;
1357    }
1358
1359    default:
1360       assert(0);
1361       break;
1362    }
1363 }
1364
1365 ast_expression::ast_expression(int oper,
1366                                ast_expression *ex0,
1367                                ast_expression *ex1,
1368                                ast_expression *ex2) :
1369    primary_expression()
1370 {
1371    this->oper = ast_operators(oper);
1372    this->subexpressions[0] = ex0;
1373    this->subexpressions[1] = ex1;
1374    this->subexpressions[2] = ex2;
1375    this->non_lvalue_description = NULL;
1376    this->is_lhs = false;
1377 }
1378
1379
1380 void
1381 ast_expression_statement::print(void) const
1382 {
1383    if (expression)
1384       expression->print();
1385
1386    printf("; ");
1387 }
1388
1389
1390 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1391    expression(ex)
1392 {
1393    /* empty */
1394 }
1395
1396
1397 void
1398 ast_function::print(void) const
1399 {
1400    return_type->print();
1401    printf(" %s (", identifier);
1402
1403    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1404       ast->print();
1405    }
1406
1407    printf(")");
1408 }
1409
1410
1411 ast_function::ast_function(void)
1412    : return_type(NULL), identifier(NULL), is_definition(false),
1413      signature(NULL)
1414 {
1415    /* empty */
1416 }
1417
1418
1419 void
1420 ast_fully_specified_type::print(void) const
1421 {
1422    _mesa_ast_type_qualifier_print(& qualifier);
1423    specifier->print();
1424 }
1425
1426
1427 void
1428 ast_parameter_declarator::print(void) const
1429 {
1430    type->print();
1431    if (identifier)
1432       printf("%s ", identifier);
1433    ast_opt_array_dimensions_print(array_specifier);
1434 }
1435
1436
1437 void
1438 ast_function_definition::print(void) const
1439 {
1440    prototype->print();
1441    body->print();
1442 }
1443
1444
1445 void
1446 ast_declaration::print(void) const
1447 {
1448    printf("%s ", identifier);
1449    ast_opt_array_dimensions_print(array_specifier);
1450
1451    if (initializer) {
1452       printf("= ");
1453       initializer->print();
1454    }
1455 }
1456
1457
1458 ast_declaration::ast_declaration(const char *identifier,
1459                                  ast_array_specifier *array_specifier,
1460                                  ast_expression *initializer)
1461 {
1462    this->identifier = identifier;
1463    this->array_specifier = array_specifier;
1464    this->initializer = initializer;
1465 }
1466
1467
1468 void
1469 ast_declarator_list::print(void) const
1470 {
1471    assert(type || invariant);
1472
1473    if (type)
1474       type->print();
1475    else if (invariant)
1476       printf("invariant ");
1477    else
1478       printf("precise ");
1479
1480    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1481       if (&ast->link != this->declarations.get_head())
1482          printf(", ");
1483
1484       ast->print();
1485    }
1486
1487    printf("; ");
1488 }
1489
1490
1491 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1492 {
1493    this->type = type;
1494    this->invariant = false;
1495    this->precise = false;
1496 }
1497
1498 void
1499 ast_jump_statement::print(void) const
1500 {
1501    switch (mode) {
1502    case ast_continue:
1503       printf("continue; ");
1504       break;
1505    case ast_break:
1506       printf("break; ");
1507       break;
1508    case ast_return:
1509       printf("return ");
1510       if (opt_return_value)
1511          opt_return_value->print();
1512
1513       printf("; ");
1514       break;
1515    case ast_discard:
1516       printf("discard; ");
1517       break;
1518    }
1519 }
1520
1521
1522 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1523    : opt_return_value(NULL)
1524 {
1525    this->mode = ast_jump_modes(mode);
1526
1527    if (mode == ast_return)
1528       opt_return_value = return_value;
1529 }
1530
1531
1532 void
1533 ast_demote_statement::print(void) const
1534 {
1535    printf("demote; ");
1536 }
1537
1538
1539 void
1540 ast_selection_statement::print(void) const
1541 {
1542    printf("if ( ");
1543    condition->print();
1544    printf(") ");
1545
1546    then_statement->print();
1547
1548    if (else_statement) {
1549       printf("else ");
1550       else_statement->print();
1551    }
1552 }
1553
1554
1555 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1556                                                  ast_node *then_statement,
1557                                                  ast_node *else_statement)
1558 {
1559    this->condition = condition;
1560    this->then_statement = then_statement;
1561    this->else_statement = else_statement;
1562 }
1563
1564
1565 void
1566 ast_switch_statement::print(void) const
1567 {
1568    printf("switch ( ");
1569    test_expression->print();
1570    printf(") ");
1571
1572    body->print();
1573 }
1574
1575
1576 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1577                                            ast_node *body)
1578 {
1579    this->test_expression = test_expression;
1580    this->body = body;
1581 }
1582
1583
1584 void
1585 ast_switch_body::print(void) const
1586 {
1587    printf("{\n");
1588    if (stmts != NULL) {
1589       stmts->print();
1590    }
1591    printf("}\n");
1592 }
1593
1594
1595 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1596 {
1597    this->stmts = stmts;
1598 }
1599
1600
1601 void ast_case_label::print(void) const
1602 {
1603    if (test_value != NULL) {
1604       printf("case ");
1605       test_value->print();
1606       printf(": ");
1607    } else {
1608       printf("default: ");
1609    }
1610 }
1611
1612
1613 ast_case_label::ast_case_label(ast_expression *test_value)
1614 {
1615    this->test_value = test_value;
1616 }
1617
1618
1619 void ast_case_label_list::print(void) const
1620 {
1621    foreach_list_typed(ast_node, ast, link, & this->labels) {
1622       ast->print();
1623    }
1624    printf("\n");
1625 }
1626
1627
1628 ast_case_label_list::ast_case_label_list(void)
1629 {
1630 }
1631
1632
1633 void ast_case_statement::print(void) const
1634 {
1635    labels->print();
1636    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1637       ast->print();
1638       printf("\n");
1639    }
1640 }
1641
1642
1643 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1644 {
1645    this->labels = labels;
1646 }
1647
1648
1649 void ast_case_statement_list::print(void) const
1650 {
1651    foreach_list_typed(ast_node, ast, link, & this->cases) {
1652       ast->print();
1653    }
1654 }
1655
1656
1657 ast_case_statement_list::ast_case_statement_list(void)
1658 {
1659 }
1660
1661
1662 void
1663 ast_iteration_statement::print(void) const
1664 {
1665    switch (mode) {
1666    case ast_for:
1667       printf("for( ");
1668       if (init_statement)
1669          init_statement->print();
1670       printf("; ");
1671
1672       if (condition)
1673          condition->print();
1674       printf("; ");
1675
1676       if (rest_expression)
1677          rest_expression->print();
1678       printf(") ");
1679
1680       body->print();
1681       break;
1682
1683    case ast_while:
1684       printf("while ( ");
1685       if (condition)
1686          condition->print();
1687       printf(") ");
1688       body->print();
1689       break;
1690
1691    case ast_do_while:
1692       printf("do ");
1693       body->print();
1694       printf("while ( ");
1695       if (condition)
1696          condition->print();
1697       printf("); ");
1698       break;
1699    }
1700 }
1701
1702
1703 ast_iteration_statement::ast_iteration_statement(int mode,
1704                                                  ast_node *init,
1705                                                  ast_node *condition,
1706                                                  ast_expression *rest_expression,
1707                                                  ast_node *body)
1708 {
1709    this->mode = ast_iteration_modes(mode);
1710    this->init_statement = init;
1711    this->condition = condition;
1712    this->rest_expression = rest_expression;
1713    this->body = body;
1714 }
1715
1716
1717 void
1718 ast_struct_specifier::print(void) const
1719 {
1720    printf("struct %s { ", name);
1721    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1722       ast->print();
1723    }
1724    printf("} ");
1725 }
1726
1727
1728 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1729                                            ast_declarator_list *declarator_list)
1730    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1731      type(NULL)
1732 {
1733    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1734 }
1735
1736 void ast_subroutine_list::print(void) const
1737 {
1738    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1739       if (&ast->link != this->declarations.get_head())
1740          printf(", ");
1741       ast->print();
1742    }
1743 }
1744
1745 static void
1746 set_shader_inout_layout(struct gl_shader *shader,
1747                      struct _mesa_glsl_parse_state *state)
1748 {
1749    /* Should have been prevented by the parser. */
1750    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1751        shader->Stage != MESA_SHADER_TESS_EVAL &&
1752        shader->Stage != MESA_SHADER_COMPUTE) {
1753       assert(!state->in_qualifier->flags.i);
1754    }
1755
1756    if (shader->Stage != MESA_SHADER_COMPUTE) {
1757       /* Should have been prevented by the parser. */
1758       assert(!state->cs_input_local_size_specified);
1759       assert(!state->cs_input_local_size_variable_specified);
1760       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1761    }
1762
1763    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1764       /* Should have been prevented by the parser. */
1765       assert(!state->fs_uses_gl_fragcoord);
1766       assert(!state->fs_redeclares_gl_fragcoord);
1767       assert(!state->fs_pixel_center_integer);
1768       assert(!state->fs_origin_upper_left);
1769       assert(!state->fs_early_fragment_tests);
1770       assert(!state->fs_inner_coverage);
1771       assert(!state->fs_post_depth_coverage);
1772       assert(!state->fs_pixel_interlock_ordered);
1773       assert(!state->fs_pixel_interlock_unordered);
1774       assert(!state->fs_sample_interlock_ordered);
1775       assert(!state->fs_sample_interlock_unordered);
1776    }
1777
1778    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1779       if (state->out_qualifier->out_xfb_stride[i]) {
1780          unsigned xfb_stride;
1781          if (state->out_qualifier->out_xfb_stride[i]->
1782                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1783                 true)) {
1784             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1785          }
1786       }
1787    }
1788
1789    switch (shader->Stage) {
1790    case MESA_SHADER_TESS_CTRL:
1791       shader->info.TessCtrl.VerticesOut = 0;
1792       if (state->tcs_output_vertices_specified) {
1793          unsigned vertices;
1794          if (state->out_qualifier->vertices->
1795                process_qualifier_constant(state, "vertices", &vertices,
1796                                           false)) {
1797
1798             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1799             if (vertices > state->Const.MaxPatchVertices) {
1800                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1801                                 "GL_MAX_PATCH_VERTICES", vertices);
1802             }
1803             shader->info.TessCtrl.VerticesOut = vertices;
1804          }
1805       }
1806       break;
1807    case MESA_SHADER_TESS_EVAL:
1808       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1809       if (state->in_qualifier->flags.q.prim_type)
1810          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1811
1812       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1813       if (state->in_qualifier->flags.q.vertex_spacing)
1814          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1815
1816       shader->info.TessEval.VertexOrder = 0;
1817       if (state->in_qualifier->flags.q.ordering)
1818          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1819
1820       shader->info.TessEval.PointMode = -1;
1821       if (state->in_qualifier->flags.q.point_mode)
1822          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1823       break;
1824    case MESA_SHADER_GEOMETRY:
1825       shader->info.Geom.VerticesOut = -1;
1826       if (state->out_qualifier->flags.q.max_vertices) {
1827          unsigned qual_max_vertices;
1828          if (state->out_qualifier->max_vertices->
1829                process_qualifier_constant(state, "max_vertices",
1830                                           &qual_max_vertices, true)) {
1831
1832             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1833                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1834                _mesa_glsl_error(&loc, state,
1835                                 "maximum output vertices (%d) exceeds "
1836                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1837                                 qual_max_vertices);
1838             }
1839             shader->info.Geom.VerticesOut = qual_max_vertices;
1840          }
1841       }
1842
1843       if (state->gs_input_prim_type_specified) {
1844          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1845       } else {
1846          shader->info.Geom.InputType = PRIM_UNKNOWN;
1847       }
1848
1849       if (state->out_qualifier->flags.q.prim_type) {
1850          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1851       } else {
1852          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1853       }
1854
1855       shader->info.Geom.Invocations = 0;
1856       if (state->in_qualifier->flags.q.invocations) {
1857          unsigned invocations;
1858          if (state->in_qualifier->invocations->
1859                process_qualifier_constant(state, "invocations",
1860                                           &invocations, false)) {
1861
1862             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1863             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1864                _mesa_glsl_error(&loc, state,
1865                                 "invocations (%d) exceeds "
1866                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1867                                 invocations);
1868             }
1869             shader->info.Geom.Invocations = invocations;
1870          }
1871       }
1872       break;
1873
1874    case MESA_SHADER_COMPUTE:
1875       if (state->cs_input_local_size_specified) {
1876          for (int i = 0; i < 3; i++)
1877             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1878       } else {
1879          for (int i = 0; i < 3; i++)
1880             shader->info.Comp.LocalSize[i] = 0;
1881       }
1882
1883       shader->info.Comp.LocalSizeVariable =
1884          state->cs_input_local_size_variable_specified;
1885
1886       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1887
1888       if (state->NV_compute_shader_derivatives_enable) {
1889          /* We allow multiple cs_input_layout nodes, but do not store them in
1890           * a convenient place, so for now live with an empty location error.
1891           */
1892          YYLTYPE loc = {0};
1893          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1894             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1895                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1896                                 "local group size whose first dimension "
1897                                 "is a multiple of 2\n");
1898             }
1899             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1900                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1901                                 "local group size whose second dimension "
1902                                 "is a multiple of 2\n");
1903             }
1904          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1905             if ((shader->info.Comp.LocalSize[0] *
1906                  shader->info.Comp.LocalSize[1] *
1907                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1908                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1909                             "local group size whose total number of invocations "
1910                             "is a multiple of 4\n");
1911             }
1912          }
1913       }
1914
1915       break;
1916
1917    case MESA_SHADER_FRAGMENT:
1918       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1919       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1920       shader->pixel_center_integer = state->fs_pixel_center_integer;
1921       shader->origin_upper_left = state->fs_origin_upper_left;
1922       shader->ARB_fragment_coord_conventions_enable =
1923          state->ARB_fragment_coord_conventions_enable;
1924       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1925       shader->InnerCoverage = state->fs_inner_coverage;
1926       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1927       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1928       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1929       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1930       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1931       shader->BlendSupport = state->fs_blend_support;
1932       break;
1933
1934    default:
1935       /* Nothing to do. */
1936       break;
1937    }
1938
1939    shader->bindless_sampler = state->bindless_sampler_specified;
1940    shader->bindless_image = state->bindless_image_specified;
1941    shader->bound_sampler = state->bound_sampler_specified;
1942    shader->bound_image = state->bound_image_specified;
1943    shader->redeclares_gl_layer = state->redeclares_gl_layer;
1944    shader->layer_viewport_relative = state->layer_viewport_relative;
1945 }
1946
1947 /* src can be NULL if only the symbols found in the exec_list should be
1948  * copied
1949  */
1950 void
1951 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1952                                    struct glsl_symbol_table *src,
1953                                    struct glsl_symbol_table *dest)
1954 {
1955    foreach_in_list (ir_instruction, ir, shader_ir) {
1956       switch (ir->ir_type) {
1957       case ir_type_function:
1958          dest->add_function((ir_function *) ir);
1959          break;
1960       case ir_type_variable: {
1961          ir_variable *const var = (ir_variable *) ir;
1962
1963          if (var->data.mode != ir_var_temporary)
1964             dest->add_variable(var);
1965          break;
1966       }
1967       default:
1968          break;
1969       }
1970    }
1971
1972    if (src != NULL) {
1973       /* Explicitly copy the gl_PerVertex interface definitions because these
1974        * are needed to check they are the same during the interstage link.
1975        * They can’t necessarily be found via the exec_list because the members
1976        * might not be referenced. The GL spec still requires that they match
1977        * in that case.
1978        */
1979       const glsl_type *iface =
1980          src->get_interface("gl_PerVertex", ir_var_shader_in);
1981       if (iface)
1982          dest->add_interface(iface->name, iface, ir_var_shader_in);
1983
1984       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1985       if (iface)
1986          dest->add_interface(iface->name, iface, ir_var_shader_out);
1987    }
1988 }
1989
1990 extern "C" {
1991
1992 static void
1993 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1994 {
1995    int j, k;
1996    int index = 0;
1997
1998    for (j = 0; j < state->num_subroutines; j++) {
1999       while (state->subroutines[j]->subroutine_index == -1) {
2000          for (k = 0; k < state->num_subroutines; k++) {
2001             if (state->subroutines[k]->subroutine_index == index)
2002                break;
2003             else if (k == state->num_subroutines - 1) {
2004                state->subroutines[j]->subroutine_index = index;
2005             }
2006          }
2007          index++;
2008       }
2009    }
2010 }
2011
2012 static void
2013 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2014                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2015                     struct glcpp_parser *data,
2016                     unsigned version,
2017                     bool es)
2018 {
2019    unsigned gl_version = state->ctx->Extensions.Version;
2020    gl_api api = state->ctx->API;
2021
2022    if (gl_version != 0xff) {
2023       unsigned i;
2024       for (i = 0; i < state->num_supported_versions; i++) {
2025          if (state->supported_versions[i].ver == version &&
2026              state->supported_versions[i].es == es) {
2027             gl_version = state->supported_versions[i].gl_ver;
2028             break;
2029          }
2030       }
2031
2032       if (i == state->num_supported_versions)
2033          return;
2034    }
2035
2036    if (es)
2037       api = API_OPENGLES2;
2038
2039    for (unsigned i = 0;
2040         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2041       const _mesa_glsl_extension *extension
2042          = &_mesa_glsl_supported_extensions[i];
2043       if (extension->compatible_with_state(state, api, gl_version)) {
2044          add_builtin_define(data, extension->name, 1);
2045       }
2046    }
2047 }
2048
2049 /* Implements parsing checks that we can't do during parsing */
2050 static void
2051 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2052 {
2053    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2054       YYLTYPE loc;
2055       memset(&loc, 0, sizeof(loc));
2056       _mesa_glsl_error(&loc, state, "Compute shaders require "
2057                        "GLSL 4.30 or GLSL ES 3.10");
2058    }
2059 }
2060
2061 static void
2062 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2063                                    struct glsl_symbol_table *source_symbols,
2064                                    struct gl_shader *shader)
2065 {
2066    assert(shader->CompileStatus != COMPILE_FAILURE &&
2067           !shader->ir->is_empty());
2068
2069    struct gl_shader_compiler_options *options =
2070       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2071
2072    /* Do some optimization at compile time to reduce shader IR size
2073     * and reduce later work if the same shader is linked multiple times
2074     */
2075    if (ctx->Const.GLSLOptimizeConservatively) {
2076       /* Run it just once. */
2077       do_common_optimization(shader->ir, false, false, options,
2078                              ctx->Const.NativeIntegers);
2079    } else {
2080       /* Repeat it until it stops making changes. */
2081       while (do_common_optimization(shader->ir, false, false, options,
2082                                     ctx->Const.NativeIntegers))
2083          ;
2084    }
2085
2086    validate_ir_tree(shader->ir);
2087
2088    enum ir_variable_mode other;
2089    switch (shader->Stage) {
2090    case MESA_SHADER_VERTEX:
2091       other = ir_var_shader_in;
2092       break;
2093    case MESA_SHADER_FRAGMENT:
2094       other = ir_var_shader_out;
2095       break;
2096    default:
2097       /* Something invalid to ensure optimize_dead_builtin_uniforms
2098        * doesn't remove anything other than uniforms or constants.
2099        */
2100       other = ir_var_mode_count;
2101       break;
2102    }
2103
2104    optimize_dead_builtin_variables(shader->ir, other);
2105
2106    validate_ir_tree(shader->ir);
2107
2108    /* Retain any live IR, but trash the rest. */
2109    reparent_ir(shader->ir, shader->ir);
2110
2111    /* Destroy the symbol table.  Create a new symbol table that contains only
2112     * the variables and functions that still exist in the IR.  The symbol
2113     * table will be used later during linking.
2114     *
2115     * There must NOT be any freed objects still referenced by the symbol
2116     * table.  That could cause the linker to dereference freed memory.
2117     *
2118     * We don't have to worry about types or interface-types here because those
2119     * are fly-weights that are looked up by glsl_type.
2120     */
2121    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2122                                       shader->symbols);
2123 }
2124
2125 static bool
2126 can_skip_compile(struct gl_context *ctx, struct gl_shader *shader,
2127                  const char *source, bool force_recompile,
2128                  bool source_has_shader_include)
2129 {
2130    if (!force_recompile) {
2131       if (ctx->Cache) {
2132          char buf[41];
2133          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2134                                 shader->sha1);
2135          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2136             /* We've seen this shader before and know it compiles */
2137             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2138                _mesa_sha1_format(buf, shader->sha1);
2139                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2140             }
2141             shader->CompileStatus = COMPILE_SKIPPED;
2142
2143             free((void *)shader->FallbackSource);
2144
2145             /* Copy pre-processed shader include to fallback source otherwise
2146              * we have no guarantee the shader include source tree has not
2147              * changed.
2148              */
2149             shader->FallbackSource = source_has_shader_include ?
2150                strdup(source) : NULL;
2151             return true;
2152          }
2153       }
2154    } else {
2155       /* We should only ever end up here if a re-compile has been forced by a
2156        * shader cache miss. In which case we can skip the compile if its
2157        * already been done by a previous fallback or the initial compile call.
2158        */
2159       if (shader->CompileStatus == COMPILE_SUCCESS)
2160          return true;
2161    }
2162
2163    return false;
2164 }
2165
2166 void
2167 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2168                           bool dump_ast, bool dump_hir, bool force_recompile)
2169 {
2170    const char *source = force_recompile && shader->FallbackSource ?
2171       shader->FallbackSource : shader->Source;
2172
2173    /* Note this will be true for shaders the have #include inside comments
2174     * however that should be rare enough not to worry about.
2175     */
2176    bool source_has_shader_include =
2177       strstr(source, "#include") == NULL ? false : true;
2178
2179    /* If there was no shader include we can check the shader cache and skip
2180     * compilation before we run the preprocessor. We never skip compiling
2181     * shaders that use ARB_shading_language_include because we would need to
2182     * keep duplicate copies of the shader include source tree and paths.
2183     */
2184    if (!source_has_shader_include &&
2185        can_skip_compile(ctx, shader, source, force_recompile, false))
2186       return;
2187
2188     struct _mesa_glsl_parse_state *state =
2189       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2190
2191    if (ctx->Const.GenerateTemporaryNames)
2192       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2193                               false, true);
2194
2195    if (!source_has_shader_include || !force_recompile) {
2196       state->error = glcpp_preprocess(state, &source, &state->info_log,
2197                                       add_builtin_defines, state, ctx);
2198    }
2199
2200    /* Now that we have run the preprocessor we can check the shader cache and
2201     * skip compilation if possible for those shaders that contained a shader
2202     * include.
2203     */
2204    if (source_has_shader_include &&
2205        can_skip_compile(ctx, shader, source, force_recompile, true))
2206       return;
2207
2208    if (!state->error) {
2209      _mesa_glsl_lexer_ctor(state, source);
2210      _mesa_glsl_parse(state);
2211      _mesa_glsl_lexer_dtor(state);
2212      do_late_parsing_checks(state);
2213    }
2214
2215    if (dump_ast) {
2216       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2217          ast->print();
2218       }
2219       printf("\n\n");
2220    }
2221
2222    ralloc_free(shader->ir);
2223    shader->ir = new(shader) exec_list;
2224    if (!state->error && !state->translation_unit.is_empty())
2225       _mesa_ast_to_hir(shader->ir, state);
2226
2227    if (!state->error) {
2228       validate_ir_tree(shader->ir);
2229
2230       /* Print out the unoptimized IR. */
2231       if (dump_hir) {
2232          _mesa_print_ir(stdout, shader->ir, state);
2233       }
2234    }
2235
2236    if (shader->InfoLog)
2237       ralloc_free(shader->InfoLog);
2238
2239    if (!state->error)
2240       set_shader_inout_layout(shader, state);
2241
2242    shader->symbols = new(shader->ir) glsl_symbol_table;
2243    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2244    shader->InfoLog = state->info_log;
2245    shader->Version = state->language_version;
2246    shader->IsES = state->es_shader;
2247
2248    struct gl_shader_compiler_options *options =
2249       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2250
2251    if (!state->error && !shader->ir->is_empty()) {
2252       if (options->LowerPrecisionFloat16 || options->LowerPrecisionInt16)
2253          lower_precision(options, shader->ir);
2254       lower_builtins(shader->ir);
2255       assign_subroutine_indexes(state);
2256       lower_subroutine(shader->ir, state);
2257       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2258    }
2259
2260    if (!force_recompile) {
2261       free((void *)shader->FallbackSource);
2262
2263       /* Copy pre-processed shader include to fallback source otherwise we
2264        * have no guarantee the shader include source tree has not changed.
2265        */
2266       shader->FallbackSource = source_has_shader_include ?
2267          strdup(source) : NULL;
2268    }
2269
2270    delete state->symbols;
2271    ralloc_free(state);
2272
2273    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2274       char sha1_buf[41];
2275       disk_cache_put_key(ctx->Cache, shader->sha1);
2276       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2277          _mesa_sha1_format(sha1_buf, shader->sha1);
2278          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2279       }
2280    }
2281 }
2282
2283 } /* extern "C" */
2284 /**
2285  * Do the set of common optimizations passes
2286  *
2287  * \param ir                          List of instructions to be optimized
2288  * \param linked                      Is the shader linked?  This enables
2289  *                                    optimizations passes that remove code at
2290  *                                    global scope and could cause linking to
2291  *                                    fail.
2292  * \param uniform_locations_assigned  Have locations already been assigned for
2293  *                                    uniforms?  This prevents the declarations
2294  *                                    of unused uniforms from being removed.
2295  *                                    The setting of this flag only matters if
2296  *                                    \c linked is \c true.
2297  * \param options                     The driver's preferred shader options.
2298  * \param native_integers             Selects optimizations that depend on the
2299  *                                    implementations supporting integers
2300  *                                    natively (as opposed to supporting
2301  *                                    integers in floating point registers).
2302  */
2303 bool
2304 do_common_optimization(exec_list *ir, bool linked,
2305                        bool uniform_locations_assigned,
2306                        const struct gl_shader_compiler_options *options,
2307                        bool native_integers)
2308 {
2309    const bool debug = false;
2310    bool progress = false;
2311
2312 #define OPT(PASS, ...) do {                                             \
2313       if (debug) {                                                      \
2314          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2315          const bool opt_progress = PASS(__VA_ARGS__);                   \
2316          progress = opt_progress || progress;                           \
2317          if (opt_progress)                                              \
2318             _mesa_print_ir(stderr, ir, NULL);                           \
2319          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2320                  #PASS, opt_progress ? "made" : "no");                  \
2321       } else {                                                          \
2322          progress = PASS(__VA_ARGS__) || progress;                      \
2323       }                                                                 \
2324    } while (false)
2325
2326    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2327
2328    if (linked) {
2329       OPT(do_function_inlining, ir);
2330       OPT(do_dead_functions, ir);
2331       OPT(do_structure_splitting, ir);
2332    }
2333    propagate_invariance(ir);
2334    OPT(do_if_simplification, ir);
2335    OPT(opt_flatten_nested_if_blocks, ir);
2336    OPT(opt_conditional_discard, ir);
2337    OPT(do_copy_propagation_elements, ir);
2338
2339    if (options->OptimizeForAOS && !linked)
2340       OPT(opt_flip_matrices, ir);
2341
2342    if (linked && options->OptimizeForAOS) {
2343       OPT(do_vectorize, ir);
2344    }
2345
2346    if (linked)
2347       OPT(do_dead_code, ir, uniform_locations_assigned);
2348    else
2349       OPT(do_dead_code_unlinked, ir);
2350    OPT(do_dead_code_local, ir);
2351    OPT(do_tree_grafting, ir);
2352    OPT(do_constant_propagation, ir);
2353    if (linked)
2354       OPT(do_constant_variable, ir);
2355    else
2356       OPT(do_constant_variable_unlinked, ir);
2357    OPT(do_constant_folding, ir);
2358    OPT(do_minmax_prune, ir);
2359    OPT(do_rebalance_tree, ir);
2360    OPT(do_algebraic, ir, native_integers, options);
2361    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2362        options->EmitNoCont, options->EmitNoLoops);
2363    OPT(do_vec_index_to_swizzle, ir);
2364    OPT(lower_vector_insert, ir, false);
2365    OPT(optimize_swizzles, ir);
2366
2367    /* Some drivers only call do_common_optimization() once rather than in a
2368     * loop, and split arrays causes each element of a constant array to
2369     * dereference is own copy of the entire array initilizer. This IR is not
2370     * something that can be generated manually in a shader and is not
2371     * accounted for by NIR optimisations, the result is an exponential slow
2372     * down in compilation speed as a constant arrays element count grows. To
2373     * avoid that here we make sure to always clean up the mess split arrays
2374     * causes to constant arrays.
2375     */
2376    bool array_split = optimize_split_arrays(ir, linked);
2377    if (array_split)
2378       do_constant_propagation(ir);
2379    progress |= array_split;
2380
2381    OPT(optimize_redundant_jumps, ir);
2382
2383    if (options->MaxUnrollIterations) {
2384       loop_state *ls = analyze_loop_variables(ir);
2385       if (ls->loop_found) {
2386          bool loop_progress = unroll_loops(ir, ls, options);
2387          while (loop_progress) {
2388             loop_progress = false;
2389             loop_progress |= do_constant_propagation(ir);
2390             loop_progress |= do_if_simplification(ir);
2391
2392             /* Some drivers only call do_common_optimization() once rather
2393              * than in a loop. So we must call do_lower_jumps() after
2394              * unrolling a loop because for drivers that use LLVM validation
2395              * will fail if a jump is not the last instruction in the block.
2396              * For example the following will fail LLVM validation:
2397              *
2398              *   (loop (
2399              *      ...
2400              *   break
2401              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2402              *      (constant int (1)) ) )
2403              *   ))
2404              */
2405             loop_progress |= do_lower_jumps(ir, true, true,
2406                                             options->EmitNoMainReturn,
2407                                             options->EmitNoCont,
2408                                             options->EmitNoLoops);
2409          }
2410          progress |= loop_progress;
2411       }
2412       delete ls;
2413    }
2414
2415 #undef OPT
2416
2417    return progress;
2418 }