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_group_vote),
 741    EXT(EXT_shader_image_load_formatted),
 742    EXT(EXT_shader_image_load_store),
 743    EXT(EXT_shader_implicit_conversions),
 744    EXT(EXT_shader_integer_mix),
 745    EXT_AEP(EXT_shader_io_blocks),
 746    EXT(EXT_shader_samples_identical),
 747    EXT(EXT_tessellation_point_size),
 748    EXT_AEP(EXT_tessellation_shader),
 749    EXT(EXT_texture_array),
 750    EXT_AEP(EXT_texture_buffer),
 751    EXT_AEP(EXT_texture_cube_map_array),
 752    EXT(EXT_texture_query_lod),
 753    EXT(EXT_texture_shadow_lod),
 754    EXT(INTEL_conservative_rasterization),
 755    EXT(INTEL_shader_atomic_float_minmax),
 756    EXT(INTEL_shader_integer_functions2),
 757    EXT(MESA_shader_integer_functions),
 758    EXT(NV_compute_shader_derivatives),
 759    EXT(NV_fragment_shader_interlock),
 760    EXT(NV_image_formats),
 761    EXT(NV_shader_atomic_float),
 762    EXT(NV_viewport_array2),
 763 };
 764
 765 #undef EXT
 766
 767
 768 /**
 769  * Determine whether a given extension is compatible with the target,
 770  * API, and extension information in the current parser state.
 771  */
 772 bool _mesa_glsl_extension::compatible_with_state(
 773       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 774 {
 775    return this->available_pred(state->ctx, api, gl_version);
 776 }
 777
 778 /**
 779  * Set the appropriate flags in the parser state to establish the
 780  * given behavior for this extension.
 781  */
 782 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 783                                      ext_behavior behavior) const
 784 {
 785    /* Note: the ->* operator indexes into state by the
 786     * offsets this->enable_flag and this->warn_flag.  See
 787     * _mesa_glsl_extension::supported_flag for more info.
 788     */
 789    state->*(this->enable_flag) = (behavior != extension_disable);
 790    state->*(this->warn_flag)   = (behavior == extension_warn);
 791 }
 792
 793 /**
 794  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 795  * the name is not found, return NULL.
 796  */
 797 static const _mesa_glsl_extension *find_extension(const char *name)
 798 {
 799    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 800       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 801          return &_mesa_glsl_supported_extensions[i];
 802       }
 803    }
 804    return NULL;
 805 }
 806
 807 bool
 808 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 809                              const char *behavior_string, YYLTYPE *behavior_locp,
 810                              _mesa_glsl_parse_state *state)
 811 {
 812    uint8_t gl_version = state->ctx->Extensions.Version;
 813    gl_api api = state->ctx->API;
 814    ext_behavior behavior;
 815    if (strcmp(behavior_string, "warn") == 0) {
 816       behavior = extension_warn;
 817    } else if (strcmp(behavior_string, "require") == 0) {
 818       behavior = extension_require;
 819    } else if (strcmp(behavior_string, "enable") == 0) {
 820       behavior = extension_enable;
 821    } else if (strcmp(behavior_string, "disable") == 0) {
 822       behavior = extension_disable;
 823    } else {
 824       _mesa_glsl_error(behavior_locp, state,
 825                        "unknown extension behavior `%s'",
 826                        behavior_string);
 827       return false;
 828    }
 829
 830    /* If we're in a desktop context but with an ES shader, use an ES API enum
 831     * to verify extension availability.
 832     */
 833    if (state->es_shader && api != API_OPENGLES2)
 834       api = API_OPENGLES2;
 835    /* Use the language-version derived GL version to extension checks, unless
 836     * we're using meta, which sets the version to the max.
 837     */
 838    if (gl_version != 0xff)
 839       gl_version = state->gl_version;
 840
 841    if (strcmp(name, "all") == 0) {
 842       if ((behavior == extension_enable) || (behavior == extension_require)) {
 843          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 844                           (behavior == extension_enable)
 845                           ? "enable" : "require");
 846          return false;
 847       } else {
 848          for (unsigned i = 0;
 849               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 850             const _mesa_glsl_extension *extension
 851                = &_mesa_glsl_supported_extensions[i];
 852             if (extension->compatible_with_state(state, api, gl_version)) {
 853                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 854             }
 855          }
 856       }
 857    } else {
 858       const _mesa_glsl_extension *extension = find_extension(name);
 859       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 860          extension->set_flags(state, behavior);
 861          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 862             for (unsigned i = 0;
 863                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 864                const _mesa_glsl_extension *extension =
 865                   &_mesa_glsl_supported_extensions[i];
 866
 867                if (!extension->aep)
 868                   continue;
 869                /* AEP should not be enabled if all of the sub-extensions can't
 870                 * also be enabled. This is not the proper layer to do such
 871                 * error-checking though.
 872                 */
 873                assert(extension->compatible_with_state(state, api, gl_version));
 874                extension->set_flags(state, behavior);
 875             }
 876          }
 877       } else {
 878          static const char fmt[] = "extension `%s' unsupported in %s shader";
 879
 880          if (behavior == extension_require) {
 881             _mesa_glsl_error(name_locp, state, fmt,
 882                              name, _mesa_shader_stage_to_string(state->stage));
 883             return false;
 884          } else {
 885             _mesa_glsl_warning(name_locp, state, fmt,
 886                                name, _mesa_shader_stage_to_string(state->stage));
 887          }
 888       }
 889    }
 890
 891    return true;
 892 }
 893
 894
 895 /**
 896  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 897  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 898  * (process_array_constructor, et al) sufficient information to do type
 899  * checking.
 900  *
 901  * Operates on assignments involving an aggregate initializer. E.g.,
 902  *
 903  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 904  *
 905  * or more ridiculously,
 906  *
 907  * struct S {
 908  *     vec4 v[2];
 909  * };
 910  *
 911  * struct {
 912  *     S a[2], b;
 913  *     int c;
 914  * } aggregate = {
 915  *     {
 916  *         {
 917  *             {
 918  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 919  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 920  *             } // a[0].v
 921  *         }, // a[0]
 922  *         {
 923  *             {
 924  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 925  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 926  *             } // a[1].v
 927  *         } // a[1]
 928  *     }, // a
 929  *     {
 930  *         {
 931  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 932  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 933  *         } // b.v
 934  *     }, // b
 935  *     4 // c
 936  * };
 937  *
 938  * This pass is necessary because the right-hand side of <type> e = { ... }
 939  * doesn't contain sufficient information to determine if the types match.
 940  */
 941 void
 942 _mesa_ast_set_aggregate_type(const glsl_type *type,
 943                              ast_expression *expr)
 944 {
 945    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 946    ai->constructor_type = type;
 947
 948    /* If the aggregate is an array, recursively set its elements' types. */
 949    if (type->is_array()) {
 950       /* Each array element has the type type->fields.array.
 951        *
 952        * E.g., if <type> if struct S[2] we want to set each element's type to
 953        * struct S.
 954        */
 955       for (exec_node *expr_node = ai->expressions.get_head_raw();
 956            !expr_node->is_tail_sentinel();
 957            expr_node = expr_node->next) {
 958          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 959                                                link);
 960
 961          if (expr->oper == ast_aggregate)
 962             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 963       }
 964
 965    /* If the aggregate is a struct, recursively set its fields' types. */
 966    } else if (type->is_struct()) {
 967       exec_node *expr_node = ai->expressions.get_head_raw();
 968
 969       /* Iterate through the struct's fields. */
 970       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 971            i++, expr_node = expr_node->next) {
 972          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 973                                                link);
 974
 975          if (expr->oper == ast_aggregate) {
 976             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 977          }
 978       }
 979    /* If the aggregate is a matrix, set its columns' types. */
 980    } else if (type->is_matrix()) {
 981       for (exec_node *expr_node = ai->expressions.get_head_raw();
 982            !expr_node->is_tail_sentinel();
 983            expr_node = expr_node->next) {
 984          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 985                                                link);
 986
 987          if (expr->oper == ast_aggregate)
 988             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 989       }
 990    }
 991 }
 992
 993 void
 994 _mesa_ast_process_interface_block(YYLTYPE *locp,
 995                                   _mesa_glsl_parse_state *state,
 996                                   ast_interface_block *const block,
 997                                   const struct ast_type_qualifier &q)
 998 {
 999    if (q.flags.q.buffer) {
1000       if (!state->has_shader_storage_buffer_objects()) {
1001          _mesa_glsl_error(locp, state,
1002                           "#version 430 / GL_ARB_shader_storage_buffer_object "
1003                           "required for defining shader storage blocks");
1004       } else if (state->ARB_shader_storage_buffer_object_warn) {
1005          _mesa_glsl_warning(locp, state,
1006                             "#version 430 / GL_ARB_shader_storage_buffer_object "
1007                             "required for defining shader storage blocks");
1008       }
1009    } else if (q.flags.q.uniform) {
1010       if (!state->has_uniform_buffer_objects()) {
1011          _mesa_glsl_error(locp, state,
1012                           "#version 140 / GL_ARB_uniform_buffer_object "
1013                           "required for defining uniform blocks");
1014       } else if (state->ARB_uniform_buffer_object_warn) {
1015          _mesa_glsl_warning(locp, state,
1016                             "#version 140 / GL_ARB_uniform_buffer_object "
1017                             "required for defining uniform blocks");
1018       }
1019    } else {
1020       if (!state->has_shader_io_blocks()) {
1021          if (state->es_shader) {
1022             _mesa_glsl_error(locp, state,
1023                              "GL_OES_shader_io_blocks or #version 320 "
1024                              "required for using interface blocks");
1025          } else {
1026             _mesa_glsl_error(locp, state,
1027                              "#version 150 required for using "
1028                              "interface blocks");
1029          }
1030       }
1031    }
1032
1033    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1034     * "It is illegal to have an input block in a vertex shader
1035     *  or an output block in a fragment shader"
1036     */
1037    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1038       _mesa_glsl_error(locp, state,
1039                        "`in' interface block is not allowed for "
1040                        "a vertex shader");
1041    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1042       _mesa_glsl_error(locp, state,
1043                        "`out' interface block is not allowed for "
1044                        "a fragment shader");
1045    }
1046
1047    /* Since block arrays require names, and both features are added in
1048     * the same language versions, we don't have to explicitly
1049     * version-check both things.
1050     */
1051    if (block->instance_name != NULL) {
1052       state->check_version(150, 300, locp, "interface blocks with "
1053                            "an instance name are not allowed");
1054    }
1055
1056    ast_type_qualifier::bitset_t interface_type_mask;
1057    struct ast_type_qualifier temp_type_qualifier;
1058
1059    /* Get a bitmask containing only the in/out/uniform/buffer
1060     * flags, allowing us to ignore other irrelevant flags like
1061     * interpolation qualifiers.
1062     */
1063    temp_type_qualifier.flags.i = 0;
1064    temp_type_qualifier.flags.q.uniform = true;
1065    temp_type_qualifier.flags.q.in = true;
1066    temp_type_qualifier.flags.q.out = true;
1067    temp_type_qualifier.flags.q.buffer = true;
1068    temp_type_qualifier.flags.q.patch = true;
1069    interface_type_mask = temp_type_qualifier.flags.i;
1070
1071    /* Get the block's interface qualifier.  The interface_qualifier
1072     * production rule guarantees that only one bit will be set (and
1073     * it will be in/out/uniform).
1074     */
1075    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1076
1077    block->default_layout.flags.i |= block_interface_qualifier;
1078
1079    if (state->stage == MESA_SHADER_GEOMETRY &&
1080        state->has_explicit_attrib_stream() &&
1081        block->default_layout.flags.q.out) {
1082       /* Assign global layout's stream value. */
1083       block->default_layout.flags.q.stream = 1;
1084       block->default_layout.flags.q.explicit_stream = 0;
1085       block->default_layout.stream = state->out_qualifier->stream;
1086    }
1087
1088    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1089       /* Assign global layout's xfb_buffer value. */
1090       block->default_layout.flags.q.xfb_buffer = 1;
1091       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1092       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1093    }
1094
1095    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1096       ast_type_qualifier& qualifier = member->type->qualifier;
1097       if ((qualifier.flags.i & interface_type_mask) == 0) {
1098          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1099           * "If no optional qualifier is used in a member declaration, the
1100           *  qualifier of the variable is just in, out, or uniform as declared
1101           *  by interface-qualifier."
1102           */
1103          qualifier.flags.i |= block_interface_qualifier;
1104       } else if ((qualifier.flags.i & interface_type_mask) !=
1105                  block_interface_qualifier) {
1106          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1107           * "If optional qualifiers are used, they can include interpolation
1108           *  and storage qualifiers and they must declare an input, output,
1109           *  or uniform variable consistent with the interface qualifier of
1110           *  the block."
1111           */
1112          _mesa_glsl_error(locp, state,
1113                           "uniform/in/out qualifier on "
1114                           "interface block member does not match "
1115                           "the interface block");
1116       }
1117
1118       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1119          _mesa_glsl_error(locp, state,
1120                           "invariant qualifiers can be used only "
1121                           "in interface block members for shader "
1122                           "inputs or outputs");
1123    }
1124 }
1125
1126 static void
1127 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1128 {
1129    if (q->is_subroutine_decl())
1130       printf("subroutine ");
1131
1132    if (q->subroutine_list) {
1133       printf("subroutine (");
1134       q->subroutine_list->print();
1135       printf(")");
1136    }
1137
1138    if (q->flags.q.constant)
1139       printf("const ");
1140
1141    if (q->flags.q.invariant)
1142       printf("invariant ");
1143
1144    if (q->flags.q.attribute)
1145       printf("attribute ");
1146
1147    if (q->flags.q.varying)
1148       printf("varying ");
1149
1150    if (q->flags.q.in && q->flags.q.out)
1151       printf("inout ");
1152    else {
1153       if (q->flags.q.in)
1154          printf("in ");
1155
1156       if (q->flags.q.out)
1157          printf("out ");
1158    }
1159
1160    if (q->flags.q.centroid)
1161       printf("centroid ");
1162    if (q->flags.q.sample)
1163       printf("sample ");
1164    if (q->flags.q.patch)
1165       printf("patch ");
1166    if (q->flags.q.uniform)
1167       printf("uniform ");
1168    if (q->flags.q.buffer)
1169       printf("buffer ");
1170    if (q->flags.q.smooth)
1171       printf("smooth ");
1172    if (q->flags.q.flat)
1173       printf("flat ");
1174    if (q->flags.q.noperspective)
1175       printf("noperspective ");
1176 }
1177
1178
1179 void
1180 ast_node::print(void) const
1181 {
1182    printf("unhandled node ");
1183 }
1184
1185
1186 ast_node::ast_node(void)
1187 {
1188    this->location.source = 0;
1189    this->location.first_line = 0;
1190    this->location.first_column = 0;
1191    this->location.last_line = 0;
1192    this->location.last_column = 0;
1193 }
1194
1195
1196 static void
1197 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1198 {
1199    if (array_specifier)
1200       array_specifier->print();
1201 }
1202
1203
1204 void
1205 ast_compound_statement::print(void) const
1206 {
1207    printf("{\n");
1208
1209    foreach_list_typed(ast_node, ast, link, &this->statements) {
1210       ast->print();
1211    }
1212
1213    printf("}\n");
1214 }
1215
1216
1217 ast_compound_statement::ast_compound_statement(int new_scope,
1218                                                ast_node *statements)
1219 {
1220    this->new_scope = new_scope;
1221
1222    if (statements != NULL) {
1223       this->statements.push_degenerate_list_at_head(&statements->link);
1224    }
1225 }
1226
1227
1228 void
1229 ast_expression::print(void) const
1230 {
1231    switch (oper) {
1232    case ast_assign:
1233    case ast_mul_assign:
1234    case ast_div_assign:
1235    case ast_mod_assign:
1236    case ast_add_assign:
1237    case ast_sub_assign:
1238    case ast_ls_assign:
1239    case ast_rs_assign:
1240    case ast_and_assign:
1241    case ast_xor_assign:
1242    case ast_or_assign:
1243       subexpressions[0]->print();
1244       printf("%s ", operator_string(oper));
1245       subexpressions[1]->print();
1246       break;
1247
1248    case ast_field_selection:
1249       subexpressions[0]->print();
1250       printf(". %s ", primary_expression.identifier);
1251       break;
1252
1253    case ast_plus:
1254    case ast_neg:
1255    case ast_bit_not:
1256    case ast_logic_not:
1257    case ast_pre_inc:
1258    case ast_pre_dec:
1259       printf("%s ", operator_string(oper));
1260       subexpressions[0]->print();
1261       break;
1262
1263    case ast_post_inc:
1264    case ast_post_dec:
1265       subexpressions[0]->print();
1266       printf("%s ", operator_string(oper));
1267       break;
1268
1269    case ast_conditional:
1270       subexpressions[0]->print();
1271       printf("? ");
1272       subexpressions[1]->print();
1273       printf(": ");
1274       subexpressions[2]->print();
1275       break;
1276
1277    case ast_array_index:
1278       subexpressions[0]->print();
1279       printf("[ ");
1280       subexpressions[1]->print();
1281       printf("] ");
1282       break;
1283
1284    case ast_function_call: {
1285       subexpressions[0]->print();
1286       printf("( ");
1287
1288       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1289          if (&ast->link != this->expressions.get_head())
1290             printf(", ");
1291
1292          ast->print();
1293       }
1294
1295       printf(") ");
1296       break;
1297    }
1298
1299    case ast_identifier:
1300       printf("%s ", primary_expression.identifier);
1301       break;
1302
1303    case ast_int_constant:
1304       printf("%d ", primary_expression.int_constant);
1305       break;
1306
1307    case ast_uint_constant:
1308       printf("%u ", primary_expression.uint_constant);
1309       break;
1310
1311    case ast_float_constant:
1312       printf("%f ", primary_expression.float_constant);
1313       break;
1314
1315    case ast_double_constant:
1316       printf("%f ", primary_expression.double_constant);
1317       break;
1318
1319    case ast_int64_constant:
1320       printf("%" PRId64 " ", primary_expression.int64_constant);
1321       break;
1322
1323    case ast_uint64_constant:
1324       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1325       break;
1326
1327    case ast_bool_constant:
1328       printf("%s ",
1329              primary_expression.bool_constant
1330              ? "true" : "false");
1331       break;
1332
1333    case ast_sequence: {
1334       printf("( ");
1335       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1336          if (&ast->link != this->expressions.get_head())
1337             printf(", ");
1338
1339          ast->print();
1340       }
1341       printf(") ");
1342       break;
1343    }
1344
1345    case ast_aggregate: {
1346       printf("{ ");
1347       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1348          if (&ast->link != this->expressions.get_head())
1349             printf(", ");
1350
1351          ast->print();
1352       }
1353       printf("} ");
1354       break;
1355    }
1356
1357    default:
1358       assert(0);
1359       break;
1360    }
1361 }
1362
1363 ast_expression::ast_expression(int oper,
1364                                ast_expression *ex0,
1365                                ast_expression *ex1,
1366                                ast_expression *ex2) :
1367    primary_expression()
1368 {
1369    this->oper = ast_operators(oper);
1370    this->subexpressions[0] = ex0;
1371    this->subexpressions[1] = ex1;
1372    this->subexpressions[2] = ex2;
1373    this->non_lvalue_description = NULL;
1374    this->is_lhs = false;
1375 }
1376
1377
1378 void
1379 ast_expression_statement::print(void) const
1380 {
1381    if (expression)
1382       expression->print();
1383
1384    printf("; ");
1385 }
1386
1387
1388 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1389    expression(ex)
1390 {
1391    /* empty */
1392 }
1393
1394
1395 void
1396 ast_function::print(void) const
1397 {
1398    return_type->print();
1399    printf(" %s (", identifier);
1400
1401    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1402       ast->print();
1403    }
1404
1405    printf(")");
1406 }
1407
1408
1409 ast_function::ast_function(void)
1410    : return_type(NULL), identifier(NULL), is_definition(false),
1411      signature(NULL)
1412 {
1413    /* empty */
1414 }
1415
1416
1417 void
1418 ast_fully_specified_type::print(void) const
1419 {
1420    _mesa_ast_type_qualifier_print(& qualifier);
1421    specifier->print();
1422 }
1423
1424
1425 void
1426 ast_parameter_declarator::print(void) const
1427 {
1428    type->print();
1429    if (identifier)
1430       printf("%s ", identifier);
1431    ast_opt_array_dimensions_print(array_specifier);
1432 }
1433
1434
1435 void
1436 ast_function_definition::print(void) const
1437 {
1438    prototype->print();
1439    body->print();
1440 }
1441
1442
1443 void
1444 ast_declaration::print(void) const
1445 {
1446    printf("%s ", identifier);
1447    ast_opt_array_dimensions_print(array_specifier);
1448
1449    if (initializer) {
1450       printf("= ");
1451       initializer->print();
1452    }
1453 }
1454
1455
1456 ast_declaration::ast_declaration(const char *identifier,
1457                                  ast_array_specifier *array_specifier,
1458                                  ast_expression *initializer)
1459 {
1460    this->identifier = identifier;
1461    this->array_specifier = array_specifier;
1462    this->initializer = initializer;
1463 }
1464
1465
1466 void
1467 ast_declarator_list::print(void) const
1468 {
1469    assert(type || invariant);
1470
1471    if (type)
1472       type->print();
1473    else if (invariant)
1474       printf("invariant ");
1475    else
1476       printf("precise ");
1477
1478    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1479       if (&ast->link != this->declarations.get_head())
1480          printf(", ");
1481
1482       ast->print();
1483    }
1484
1485    printf("; ");
1486 }
1487
1488
1489 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1490 {
1491    this->type = type;
1492    this->invariant = false;
1493    this->precise = false;
1494 }
1495
1496 void
1497 ast_jump_statement::print(void) const
1498 {
1499    switch (mode) {
1500    case ast_continue:
1501       printf("continue; ");
1502       break;
1503    case ast_break:
1504       printf("break; ");
1505       break;
1506    case ast_return:
1507       printf("return ");
1508       if (opt_return_value)
1509          opt_return_value->print();
1510
1511       printf("; ");
1512       break;
1513    case ast_discard:
1514       printf("discard; ");
1515       break;
1516    }
1517 }
1518
1519
1520 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1521    : opt_return_value(NULL)
1522 {
1523    this->mode = ast_jump_modes(mode);
1524
1525    if (mode == ast_return)
1526       opt_return_value = return_value;
1527 }
1528
1529
1530 void
1531 ast_demote_statement::print(void) const
1532 {
1533    printf("demote; ");
1534 }
1535
1536
1537 void
1538 ast_selection_statement::print(void) const
1539 {
1540    printf("if ( ");
1541    condition->print();
1542    printf(") ");
1543
1544    then_statement->print();
1545
1546    if (else_statement) {
1547       printf("else ");
1548       else_statement->print();
1549    }
1550 }
1551
1552
1553 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1554                                                  ast_node *then_statement,
1555                                                  ast_node *else_statement)
1556 {
1557    this->condition = condition;
1558    this->then_statement = then_statement;
1559    this->else_statement = else_statement;
1560 }
1561
1562
1563 void
1564 ast_switch_statement::print(void) const
1565 {
1566    printf("switch ( ");
1567    test_expression->print();
1568    printf(") ");
1569
1570    body->print();
1571 }
1572
1573
1574 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1575                                            ast_node *body)
1576 {
1577    this->test_expression = test_expression;
1578    this->body = body;
1579 }
1580
1581
1582 void
1583 ast_switch_body::print(void) const
1584 {
1585    printf("{\n");
1586    if (stmts != NULL) {
1587       stmts->print();
1588    }
1589    printf("}\n");
1590 }
1591
1592
1593 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1594 {
1595    this->stmts = stmts;
1596 }
1597
1598
1599 void ast_case_label::print(void) const
1600 {
1601    if (test_value != NULL) {
1602       printf("case ");
1603       test_value->print();
1604       printf(": ");
1605    } else {
1606       printf("default: ");
1607    }
1608 }
1609
1610
1611 ast_case_label::ast_case_label(ast_expression *test_value)
1612 {
1613    this->test_value = test_value;
1614 }
1615
1616
1617 void ast_case_label_list::print(void) const
1618 {
1619    foreach_list_typed(ast_node, ast, link, & this->labels) {
1620       ast->print();
1621    }
1622    printf("\n");
1623 }
1624
1625
1626 ast_case_label_list::ast_case_label_list(void)
1627 {
1628 }
1629
1630
1631 void ast_case_statement::print(void) const
1632 {
1633    labels->print();
1634    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1635       ast->print();
1636       printf("\n");
1637    }
1638 }
1639
1640
1641 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1642 {
1643    this->labels = labels;
1644 }
1645
1646
1647 void ast_case_statement_list::print(void) const
1648 {
1649    foreach_list_typed(ast_node, ast, link, & this->cases) {
1650       ast->print();
1651    }
1652 }
1653
1654
1655 ast_case_statement_list::ast_case_statement_list(void)
1656 {
1657 }
1658
1659
1660 void
1661 ast_iteration_statement::print(void) const
1662 {
1663    switch (mode) {
1664    case ast_for:
1665       printf("for( ");
1666       if (init_statement)
1667          init_statement->print();
1668       printf("; ");
1669
1670       if (condition)
1671          condition->print();
1672       printf("; ");
1673
1674       if (rest_expression)
1675          rest_expression->print();
1676       printf(") ");
1677
1678       body->print();
1679       break;
1680
1681    case ast_while:
1682       printf("while ( ");
1683       if (condition)
1684          condition->print();
1685       printf(") ");
1686       body->print();
1687       break;
1688
1689    case ast_do_while:
1690       printf("do ");
1691       body->print();
1692       printf("while ( ");
1693       if (condition)
1694          condition->print();
1695       printf("); ");
1696       break;
1697    }
1698 }
1699
1700
1701 ast_iteration_statement::ast_iteration_statement(int mode,
1702                                                  ast_node *init,
1703                                                  ast_node *condition,
1704                                                  ast_expression *rest_expression,
1705                                                  ast_node *body)
1706 {
1707    this->mode = ast_iteration_modes(mode);
1708    this->init_statement = init;
1709    this->condition = condition;
1710    this->rest_expression = rest_expression;
1711    this->body = body;
1712 }
1713
1714
1715 void
1716 ast_struct_specifier::print(void) const
1717 {
1718    printf("struct %s { ", name);
1719    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1720       ast->print();
1721    }
1722    printf("} ");
1723 }
1724
1725
1726 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1727                                            ast_declarator_list *declarator_list)
1728    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1729      type(NULL)
1730 {
1731    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1732 }
1733
1734 void ast_subroutine_list::print(void) const
1735 {
1736    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1737       if (&ast->link != this->declarations.get_head())
1738          printf(", ");
1739       ast->print();
1740    }
1741 }
1742
1743 static void
1744 set_shader_inout_layout(struct gl_shader *shader,
1745                      struct _mesa_glsl_parse_state *state)
1746 {
1747    /* Should have been prevented by the parser. */
1748    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1749        shader->Stage != MESA_SHADER_TESS_EVAL &&
1750        shader->Stage != MESA_SHADER_COMPUTE) {
1751       assert(!state->in_qualifier->flags.i);
1752    }
1753
1754    if (shader->Stage != MESA_SHADER_COMPUTE) {
1755       /* Should have been prevented by the parser. */
1756       assert(!state->cs_input_local_size_specified);
1757       assert(!state->cs_input_local_size_variable_specified);
1758       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1759    }
1760
1761    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1762       /* Should have been prevented by the parser. */
1763       assert(!state->fs_uses_gl_fragcoord);
1764       assert(!state->fs_redeclares_gl_fragcoord);
1765       assert(!state->fs_pixel_center_integer);
1766       assert(!state->fs_origin_upper_left);
1767       assert(!state->fs_early_fragment_tests);
1768       assert(!state->fs_inner_coverage);
1769       assert(!state->fs_post_depth_coverage);
1770       assert(!state->fs_pixel_interlock_ordered);
1771       assert(!state->fs_pixel_interlock_unordered);
1772       assert(!state->fs_sample_interlock_ordered);
1773       assert(!state->fs_sample_interlock_unordered);
1774    }
1775
1776    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1777       if (state->out_qualifier->out_xfb_stride[i]) {
1778          unsigned xfb_stride;
1779          if (state->out_qualifier->out_xfb_stride[i]->
1780                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1781                 true)) {
1782             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1783          }
1784       }
1785    }
1786
1787    switch (shader->Stage) {
1788    case MESA_SHADER_TESS_CTRL:
1789       shader->info.TessCtrl.VerticesOut = 0;
1790       if (state->tcs_output_vertices_specified) {
1791          unsigned vertices;
1792          if (state->out_qualifier->vertices->
1793                process_qualifier_constant(state, "vertices", &vertices,
1794                                           false)) {
1795
1796             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1797             if (vertices > state->Const.MaxPatchVertices) {
1798                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1799                                 "GL_MAX_PATCH_VERTICES", vertices);
1800             }
1801             shader->info.TessCtrl.VerticesOut = vertices;
1802          }
1803       }
1804       break;
1805    case MESA_SHADER_TESS_EVAL:
1806       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1807       if (state->in_qualifier->flags.q.prim_type)
1808          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1809
1810       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1811       if (state->in_qualifier->flags.q.vertex_spacing)
1812          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1813
1814       shader->info.TessEval.VertexOrder = 0;
1815       if (state->in_qualifier->flags.q.ordering)
1816          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1817
1818       shader->info.TessEval.PointMode = -1;
1819       if (state->in_qualifier->flags.q.point_mode)
1820          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1821       break;
1822    case MESA_SHADER_GEOMETRY:
1823       shader->info.Geom.VerticesOut = -1;
1824       if (state->out_qualifier->flags.q.max_vertices) {
1825          unsigned qual_max_vertices;
1826          if (state->out_qualifier->max_vertices->
1827                process_qualifier_constant(state, "max_vertices",
1828                                           &qual_max_vertices, true)) {
1829
1830             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1831                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1832                _mesa_glsl_error(&loc, state,
1833                                 "maximum output vertices (%d) exceeds "
1834                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1835                                 qual_max_vertices);
1836             }
1837             shader->info.Geom.VerticesOut = qual_max_vertices;
1838          }
1839       }
1840
1841       if (state->gs_input_prim_type_specified) {
1842          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1843       } else {
1844          shader->info.Geom.InputType = PRIM_UNKNOWN;
1845       }
1846
1847       if (state->out_qualifier->flags.q.prim_type) {
1848          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1849       } else {
1850          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1851       }
1852
1853       shader->info.Geom.Invocations = 0;
1854       if (state->in_qualifier->flags.q.invocations) {
1855          unsigned invocations;
1856          if (state->in_qualifier->invocations->
1857                process_qualifier_constant(state, "invocations",
1858                                           &invocations, false)) {
1859
1860             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1861             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1862                _mesa_glsl_error(&loc, state,
1863                                 "invocations (%d) exceeds "
1864                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1865                                 invocations);
1866             }
1867             shader->info.Geom.Invocations = invocations;
1868          }
1869       }
1870       break;
1871
1872    case MESA_SHADER_COMPUTE:
1873       if (state->cs_input_local_size_specified) {
1874          for (int i = 0; i < 3; i++)
1875             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1876       } else {
1877          for (int i = 0; i < 3; i++)
1878             shader->info.Comp.LocalSize[i] = 0;
1879       }
1880
1881       shader->info.Comp.LocalSizeVariable =
1882          state->cs_input_local_size_variable_specified;
1883
1884       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1885
1886       if (state->NV_compute_shader_derivatives_enable) {
1887          /* We allow multiple cs_input_layout nodes, but do not store them in
1888           * a convenient place, so for now live with an empty location error.
1889           */
1890          YYLTYPE loc = {0};
1891          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1892             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1893                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1894                                 "local group size whose first dimension "
1895                                 "is a multiple of 2\n");
1896             }
1897             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1898                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1899                                 "local group size whose second dimension "
1900                                 "is a multiple of 2\n");
1901             }
1902          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1903             if ((shader->info.Comp.LocalSize[0] *
1904                  shader->info.Comp.LocalSize[1] *
1905                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1906                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1907                             "local group size whose total number of invocations "
1908                             "is a multiple of 4\n");
1909             }
1910          }
1911       }
1912
1913       break;
1914
1915    case MESA_SHADER_FRAGMENT:
1916       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1917       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1918       shader->pixel_center_integer = state->fs_pixel_center_integer;
1919       shader->origin_upper_left = state->fs_origin_upper_left;
1920       shader->ARB_fragment_coord_conventions_enable =
1921          state->ARB_fragment_coord_conventions_enable;
1922       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1923       shader->InnerCoverage = state->fs_inner_coverage;
1924       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1925       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1926       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1927       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1928       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1929       shader->BlendSupport = state->fs_blend_support;
1930       break;
1931
1932    default:
1933       /* Nothing to do. */
1934       break;
1935    }
1936
1937    shader->bindless_sampler = state->bindless_sampler_specified;
1938    shader->bindless_image = state->bindless_image_specified;
1939    shader->bound_sampler = state->bound_sampler_specified;
1940    shader->bound_image = state->bound_image_specified;
1941    shader->redeclares_gl_layer = state->redeclares_gl_layer;
1942    shader->layer_viewport_relative = state->layer_viewport_relative;
1943 }
1944
1945 /* src can be NULL if only the symbols found in the exec_list should be
1946  * copied
1947  */
1948 void
1949 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1950                                    struct glsl_symbol_table *src,
1951                                    struct glsl_symbol_table *dest)
1952 {
1953    foreach_in_list (ir_instruction, ir, shader_ir) {
1954       switch (ir->ir_type) {
1955       case ir_type_function:
1956          dest->add_function((ir_function *) ir);
1957          break;
1958       case ir_type_variable: {
1959          ir_variable *const var = (ir_variable *) ir;
1960
1961          if (var->data.mode != ir_var_temporary)
1962             dest->add_variable(var);
1963          break;
1964       }
1965       default:
1966          break;
1967       }
1968    }
1969
1970    if (src != NULL) {
1971       /* Explicitly copy the gl_PerVertex interface definitions because these
1972        * are needed to check they are the same during the interstage link.
1973        * They can’t necessarily be found via the exec_list because the members
1974        * might not be referenced. The GL spec still requires that they match
1975        * in that case.
1976        */
1977       const glsl_type *iface =
1978          src->get_interface("gl_PerVertex", ir_var_shader_in);
1979       if (iface)
1980          dest->add_interface(iface->name, iface, ir_var_shader_in);
1981
1982       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1983       if (iface)
1984          dest->add_interface(iface->name, iface, ir_var_shader_out);
1985    }
1986 }
1987
1988 extern "C" {
1989
1990 static void
1991 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1992 {
1993    int j, k;
1994    int index = 0;
1995
1996    for (j = 0; j < state->num_subroutines; j++) {
1997       while (state->subroutines[j]->subroutine_index == -1) {
1998          for (k = 0; k < state->num_subroutines; k++) {
1999             if (state->subroutines[k]->subroutine_index == index)
2000                break;
2001             else if (k == state->num_subroutines - 1) {
2002                state->subroutines[j]->subroutine_index = index;
2003             }
2004          }
2005          index++;
2006       }
2007    }
2008 }
2009
2010 static void
2011 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2012                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2013                     struct glcpp_parser *data,
2014                     unsigned version,
2015                     bool es)
2016 {
2017    unsigned gl_version = state->ctx->Extensions.Version;
2018    gl_api api = state->ctx->API;
2019
2020    if (gl_version != 0xff) {
2021       unsigned i;
2022       for (i = 0; i < state->num_supported_versions; i++) {
2023          if (state->supported_versions[i].ver == version &&
2024              state->supported_versions[i].es == es) {
2025             gl_version = state->supported_versions[i].gl_ver;
2026             break;
2027          }
2028       }
2029
2030       if (i == state->num_supported_versions)
2031          return;
2032    }
2033
2034    if (es)
2035       api = API_OPENGLES2;
2036
2037    for (unsigned i = 0;
2038         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2039       const _mesa_glsl_extension *extension
2040          = &_mesa_glsl_supported_extensions[i];
2041       if (extension->compatible_with_state(state, api, gl_version)) {
2042          add_builtin_define(data, extension->name, 1);
2043       }
2044    }
2045 }
2046
2047 /* Implements parsing checks that we can't do during parsing */
2048 static void
2049 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2050 {
2051    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2052       YYLTYPE loc;
2053       memset(&loc, 0, sizeof(loc));
2054       _mesa_glsl_error(&loc, state, "Compute shaders require "
2055                        "GLSL 4.30 or GLSL ES 3.10");
2056    }
2057 }
2058
2059 static void
2060 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2061                                    struct glsl_symbol_table *source_symbols,
2062                                    struct gl_shader *shader)
2063 {
2064    assert(shader->CompileStatus != COMPILE_FAILURE &&
2065           !shader->ir->is_empty());
2066
2067    struct gl_shader_compiler_options *options =
2068       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2069
2070    /* Do some optimization at compile time to reduce shader IR size
2071     * and reduce later work if the same shader is linked multiple times
2072     */
2073    if (ctx->Const.GLSLOptimizeConservatively) {
2074       /* Run it just once. */
2075       do_common_optimization(shader->ir, false, false, options,
2076                              ctx->Const.NativeIntegers);
2077    } else {
2078       /* Repeat it until it stops making changes. */
2079       while (do_common_optimization(shader->ir, false, false, options,
2080                                     ctx->Const.NativeIntegers))
2081          ;
2082    }
2083
2084    validate_ir_tree(shader->ir);
2085
2086    enum ir_variable_mode other;
2087    switch (shader->Stage) {
2088    case MESA_SHADER_VERTEX:
2089       other = ir_var_shader_in;
2090       break;
2091    case MESA_SHADER_FRAGMENT:
2092       other = ir_var_shader_out;
2093       break;
2094    default:
2095       /* Something invalid to ensure optimize_dead_builtin_uniforms
2096        * doesn't remove anything other than uniforms or constants.
2097        */
2098       other = ir_var_mode_count;
2099       break;
2100    }
2101
2102    optimize_dead_builtin_variables(shader->ir, other);
2103
2104    validate_ir_tree(shader->ir);
2105
2106    /* Retain any live IR, but trash the rest. */
2107    reparent_ir(shader->ir, shader->ir);
2108
2109    /* Destroy the symbol table.  Create a new symbol table that contains only
2110     * the variables and functions that still exist in the IR.  The symbol
2111     * table will be used later during linking.
2112     *
2113     * There must NOT be any freed objects still referenced by the symbol
2114     * table.  That could cause the linker to dereference freed memory.
2115     *
2116     * We don't have to worry about types or interface-types here because those
2117     * are fly-weights that are looked up by glsl_type.
2118     */
2119    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2120                                       shader->symbols);
2121 }
2122
2123 static bool
2124 can_skip_compile(struct gl_context *ctx, struct gl_shader *shader,
2125                  const char *source, bool force_recompile,
2126                  bool source_has_shader_include)
2127 {
2128    if (!force_recompile) {
2129       if (ctx->Cache) {
2130          char buf[41];
2131          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2132                                 shader->sha1);
2133          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2134             /* We've seen this shader before and know it compiles */
2135             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2136                _mesa_sha1_format(buf, shader->sha1);
2137                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2138             }
2139             shader->CompileStatus = COMPILE_SKIPPED;
2140
2141             free((void *)shader->FallbackSource);
2142
2143             /* Copy pre-processed shader include to fallback source otherwise
2144              * we have no guarantee the shader include source tree has not
2145              * changed.
2146              */
2147             shader->FallbackSource = source_has_shader_include ?
2148                strdup(source) : NULL;
2149             return true;
2150          }
2151       }
2152    } else {
2153       /* We should only ever end up here if a re-compile has been forced by a
2154        * shader cache miss. In which case we can skip the compile if its
2155        * already been done by a previous fallback or the initial compile call.
2156        */
2157       if (shader->CompileStatus == COMPILE_SUCCESS)
2158          return true;
2159    }
2160
2161    return false;
2162 }
2163
2164 void
2165 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2166                           bool dump_ast, bool dump_hir, bool force_recompile)
2167 {
2168    const char *source = force_recompile && shader->FallbackSource ?
2169       shader->FallbackSource : shader->Source;
2170
2171    /* Note this will be true for shaders the have #include inside comments
2172     * however that should be rare enough not to worry about.
2173     */
2174    bool source_has_shader_include =
2175       strstr(source, "#include") == NULL ? false : true;
2176
2177    /* If there was no shader include we can check the shader cache and skip
2178     * compilation before we run the preprocessor. We never skip compiling
2179     * shaders that use ARB_shading_language_include because we would need to
2180     * keep duplicate copies of the shader include source tree and paths.
2181     */
2182    if (!source_has_shader_include &&
2183        can_skip_compile(ctx, shader, source, force_recompile, false))
2184       return;
2185
2186     struct _mesa_glsl_parse_state *state =
2187       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2188
2189    if (ctx->Const.GenerateTemporaryNames)
2190       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2191                               false, true);
2192
2193    if (!source_has_shader_include || !force_recompile) {
2194       state->error = glcpp_preprocess(state, &source, &state->info_log,
2195                                       add_builtin_defines, state, ctx);
2196    }
2197
2198    /* Now that we have run the preprocessor we can check the shader cache and
2199     * skip compilation if possible for those shaders that contained a shader
2200     * include.
2201     */
2202    if (source_has_shader_include &&
2203        can_skip_compile(ctx, shader, source, force_recompile, true))
2204       return;
2205
2206    if (!state->error) {
2207      _mesa_glsl_lexer_ctor(state, source);
2208      _mesa_glsl_parse(state);
2209      _mesa_glsl_lexer_dtor(state);
2210      do_late_parsing_checks(state);
2211    }
2212
2213    if (dump_ast) {
2214       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2215          ast->print();
2216       }
2217       printf("\n\n");
2218    }
2219
2220    ralloc_free(shader->ir);
2221    shader->ir = new(shader) exec_list;
2222    if (!state->error && !state->translation_unit.is_empty())
2223       _mesa_ast_to_hir(shader->ir, state);
2224
2225    if (!state->error) {
2226       validate_ir_tree(shader->ir);
2227
2228       /* Print out the unoptimized IR. */
2229       if (dump_hir) {
2230          _mesa_print_ir(stdout, shader->ir, state);
2231       }
2232    }
2233
2234    if (shader->InfoLog)
2235       ralloc_free(shader->InfoLog);
2236
2237    if (!state->error)
2238       set_shader_inout_layout(shader, state);
2239
2240    shader->symbols = new(shader->ir) glsl_symbol_table;
2241    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2242    shader->InfoLog = state->info_log;
2243    shader->Version = state->language_version;
2244    shader->IsES = state->es_shader;
2245
2246    struct gl_shader_compiler_options *options =
2247       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2248
2249    if (!state->error && !shader->ir->is_empty()) {
2250       if (options->LowerPrecisionFloat16 || options->LowerPrecisionInt16)
2251          lower_precision(options, shader->ir);
2252       lower_builtins(shader->ir);
2253       assign_subroutine_indexes(state);
2254       lower_subroutine(shader->ir, state);
2255       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2256    }
2257
2258    if (!force_recompile) {
2259       free((void *)shader->FallbackSource);
2260
2261       /* Copy pre-processed shader include to fallback source otherwise we
2262        * have no guarantee the shader include source tree has not changed.
2263        */
2264       shader->FallbackSource = source_has_shader_include ?
2265          strdup(source) : NULL;
2266    }
2267
2268    delete state->symbols;
2269    ralloc_free(state);
2270
2271    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2272       char sha1_buf[41];
2273       disk_cache_put_key(ctx->Cache, shader->sha1);
2274       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2275          _mesa_sha1_format(sha1_buf, shader->sha1);
2276          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2277       }
2278    }
2279 }
2280
2281 } /* extern "C" */
2282 /**
2283  * Do the set of common optimizations passes
2284  *
2285  * \param ir                          List of instructions to be optimized
2286  * \param linked                      Is the shader linked?  This enables
2287  *                                    optimizations passes that remove code at
2288  *                                    global scope and could cause linking to
2289  *                                    fail.
2290  * \param uniform_locations_assigned  Have locations already been assigned for
2291  *                                    uniforms?  This prevents the declarations
2292  *                                    of unused uniforms from being removed.
2293  *                                    The setting of this flag only matters if
2294  *                                    \c linked is \c true.
2295  * \param options                     The driver's preferred shader options.
2296  * \param native_integers             Selects optimizations that depend on the
2297  *                                    implementations supporting integers
2298  *                                    natively (as opposed to supporting
2299  *                                    integers in floating point registers).
2300  */
2301 bool
2302 do_common_optimization(exec_list *ir, bool linked,
2303                        bool uniform_locations_assigned,
2304                        const struct gl_shader_compiler_options *options,
2305                        bool native_integers)
2306 {
2307    const bool debug = false;
2308    bool progress = false;
2309
2310 #define OPT(PASS, ...) do {                                             \
2311       if (debug) {                                                      \
2312          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2313          const bool opt_progress = PASS(__VA_ARGS__);                   \
2314          progress = opt_progress || progress;                           \
2315          if (opt_progress)                                              \
2316             _mesa_print_ir(stderr, ir, NULL);                           \
2317          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2318                  #PASS, opt_progress ? "made" : "no");                  \
2319       } else {                                                          \
2320          progress = PASS(__VA_ARGS__) || progress;                      \
2321       }                                                                 \
2322    } while (false)
2323
2324    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2325
2326    if (linked) {
2327       OPT(do_function_inlining, ir);
2328       OPT(do_dead_functions, ir);
2329       OPT(do_structure_splitting, ir);
2330    }
2331    propagate_invariance(ir);
2332    OPT(do_if_simplification, ir);
2333    OPT(opt_flatten_nested_if_blocks, ir);
2334    OPT(opt_conditional_discard, ir);
2335    OPT(do_copy_propagation_elements, ir);
2336
2337    if (options->OptimizeForAOS && !linked)
2338       OPT(opt_flip_matrices, ir);
2339
2340    if (linked && options->OptimizeForAOS) {
2341       OPT(do_vectorize, ir);
2342    }
2343
2344    if (linked)
2345       OPT(do_dead_code, ir, uniform_locations_assigned);
2346    else
2347       OPT(do_dead_code_unlinked, ir);
2348    OPT(do_dead_code_local, ir);
2349    OPT(do_tree_grafting, ir);
2350    OPT(do_constant_propagation, ir);
2351    if (linked)
2352       OPT(do_constant_variable, ir);
2353    else
2354       OPT(do_constant_variable_unlinked, ir);
2355    OPT(do_constant_folding, ir);
2356    OPT(do_minmax_prune, ir);
2357    OPT(do_rebalance_tree, ir);
2358    OPT(do_algebraic, ir, native_integers, options);
2359    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2360        options->EmitNoCont, options->EmitNoLoops);
2361    OPT(do_vec_index_to_swizzle, ir);
2362    OPT(lower_vector_insert, ir, false);
2363    OPT(optimize_swizzles, ir);
2364
2365    /* Some drivers only call do_common_optimization() once rather than in a
2366     * loop, and split arrays causes each element of a constant array to
2367     * dereference is own copy of the entire array initilizer. This IR is not
2368     * something that can be generated manually in a shader and is not
2369     * accounted for by NIR optimisations, the result is an exponential slow
2370     * down in compilation speed as a constant arrays element count grows. To
2371     * avoid that here we make sure to always clean up the mess split arrays
2372     * causes to constant arrays.
2373     */
2374    bool array_split = optimize_split_arrays(ir, linked);
2375    if (array_split)
2376       do_constant_propagation(ir);
2377    progress |= array_split;
2378
2379    OPT(optimize_redundant_jumps, ir);
2380
2381    if (options->MaxUnrollIterations) {
2382       loop_state *ls = analyze_loop_variables(ir);
2383       if (ls->loop_found) {
2384          bool loop_progress = unroll_loops(ir, ls, options);
2385          while (loop_progress) {
2386             loop_progress = false;
2387             loop_progress |= do_constant_propagation(ir);
2388             loop_progress |= do_if_simplification(ir);
2389
2390             /* Some drivers only call do_common_optimization() once rather
2391              * than in a loop. So we must call do_lower_jumps() after
2392              * unrolling a loop because for drivers that use LLVM validation
2393              * will fail if a jump is not the last instruction in the block.
2394              * For example the following will fail LLVM validation:
2395              *
2396              *   (loop (
2397              *      ...
2398              *   break
2399              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2400              *      (constant int (1)) ) )
2401              *   ))
2402              */
2403             loop_progress |= do_lower_jumps(ir, true, true,
2404                                             options->EmitNoMainReturn,
2405                                             options->EmitNoCont,
2406                                             options->EmitNoLoops);
2407          }
2408          progress |= loop_progress;
2409       }
2410       delete ls;
2411    }
2412
2413 #undef OPT
2414
2415    return progress;
2416 }