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