2 * Copyright © 2008, 2009 Intel Corporation
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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,
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9 * Software is furnished to do so, subject to the following conditions:
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
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,
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21 * DEALINGS IN THE SOFTWARE.
29 #include "main/core.h" /* for struct gl_context */
34 #include "glsl_parser_extras.h"
35 #include "glsl_parser.h"
36 #include "ir_optimization.h"
37 #include "loop_analysis.h"
39 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *ctx,
40 GLenum target, void *mem_ctx)
43 case GL_VERTEX_SHADER: this->target = vertex_shader; break;
44 case GL_FRAGMENT_SHADER: this->target = fragment_shader; break;
45 case GL_GEOMETRY_SHADER: this->target = geometry_shader; break;
49 this->translation_unit.make_empty();
50 this->symbols = new(mem_ctx) glsl_symbol_table;
51 this->info_log = ralloc_strdup(mem_ctx, "");
53 this->loop_or_switch_nesting = NULL;
55 /* Set default language version and extensions */
56 this->language_version = 110;
57 this->es_shader = false;
58 this->ARB_texture_rectangle_enable = true;
60 /* OpenGL ES 2.0 has different defaults from desktop GL. */
61 if (ctx->API == API_OPENGLES2) {
62 this->language_version = 100;
63 this->es_shader = true;
64 this->ARB_texture_rectangle_enable = false;
67 this->extensions = &ctx->Extensions;
69 this->Const.MaxLights = ctx->Const.MaxLights;
70 this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
71 this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
72 this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
73 this->Const.MaxVertexAttribs = ctx->Const.VertexProgram.MaxAttribs;
74 this->Const.MaxVertexUniformComponents = ctx->Const.VertexProgram.MaxUniformComponents;
75 this->Const.MaxVaryingFloats = ctx->Const.MaxVarying * 4;
76 this->Const.MaxVertexTextureImageUnits = ctx->Const.MaxVertexTextureImageUnits;
77 this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
78 this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits;
79 this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents;
81 this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
83 /* Note: Once the OpenGL 3.0 'forward compatible' context or the OpenGL 3.2
84 * Core context is supported, this logic will need change. Older versions of
85 * GLSL are no longer supported outside the compatibility contexts of 3.x.
87 this->Const.GLSL_100ES = (ctx->API == API_OPENGLES2)
88 || ctx->Extensions.ARB_ES2_compatibility;
89 this->Const.GLSL_110 = (ctx->API == API_OPENGL);
90 this->Const.GLSL_120 = (ctx->API == API_OPENGL)
91 && (ctx->Const.GLSLVersion >= 120);
92 this->Const.GLSL_130 = (ctx->API == API_OPENGL)
93 && (ctx->Const.GLSLVersion >= 130);
95 const unsigned lowest_version =
96 (ctx->API == API_OPENGLES2) || ctx->Extensions.ARB_ES2_compatibility
98 const unsigned highest_version =
99 (ctx->API == API_OPENGL) ? ctx->Const.GLSLVersion : 100;
100 char *supported = ralloc_strdup(this, "");
102 for (unsigned ver = lowest_version; ver <= highest_version; ver += 10) {
103 const char *const prefix = (ver == lowest_version)
105 : ((ver == highest_version) ? ", and " : ", ");
107 ralloc_asprintf_append(& supported, "%s%d.%02d%s",
109 ver / 100, ver % 100,
110 (ver == 100) ? " ES" : "");
113 this->supported_version_string = supported;
117 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
120 case vertex_shader: return "vertex";
121 case fragment_shader: return "fragment";
122 case geometry_shader: return "geometry";
125 assert(!"Should not get here.");
131 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
132 const char *fmt, ...)
138 assert(state->info_log != NULL);
139 ralloc_asprintf_append(&state->info_log, "%u:%u(%u): error: ",
144 ralloc_vasprintf_append(&state->info_log, fmt, ap);
146 ralloc_strcat(&state->info_log, "\n");
151 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
152 const char *fmt, ...)
156 assert(state->info_log != NULL);
157 ralloc_asprintf_append(&state->info_log, "%u:%u(%u): warning: ",
162 ralloc_vasprintf_append(&state->info_log, fmt, ap);
164 ralloc_strcat(&state->info_log, "\n");
169 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
170 const char *behavior, YYLTYPE *behavior_locp,
171 _mesa_glsl_parse_state *state)
180 if (strcmp(behavior, "warn") == 0) {
181 ext_mode = extension_warn;
182 } else if (strcmp(behavior, "require") == 0) {
183 ext_mode = extension_require;
184 } else if (strcmp(behavior, "enable") == 0) {
185 ext_mode = extension_enable;
186 } else if (strcmp(behavior, "disable") == 0) {
187 ext_mode = extension_disable;
189 _mesa_glsl_error(behavior_locp, state,
190 "Unknown extension behavior `%s'",
195 bool unsupported = false;
197 if (strcmp(name, "all") == 0) {
198 if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {
199 _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
200 (ext_mode == extension_enable)
201 ? "enable" : "require");
204 } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
205 /* This extension is only supported in fragment shaders.
207 if (state->target != fragment_shader) {
210 state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
211 state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
213 } else if (strcmp(name, "GL_ARB_draw_instanced") == 0) {
214 /* This extension is only supported in vertex shaders.
216 if (state->target != vertex_shader) {
219 state->ARB_draw_instanced_enable = (ext_mode != extension_disable);
220 state->ARB_draw_instanced_warn = (ext_mode == extension_warn);
222 } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {
223 state->ARB_explicit_attrib_location_enable =
224 (ext_mode != extension_disable);
225 state->ARB_explicit_attrib_location_warn =
226 (ext_mode == extension_warn);
228 unsupported = !state->extensions->ARB_explicit_attrib_location;
229 } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {
230 state->ARB_fragment_coord_conventions_enable =
231 (ext_mode != extension_disable);
232 state->ARB_fragment_coord_conventions_warn =
233 (ext_mode == extension_warn);
235 unsupported = !state->extensions->ARB_fragment_coord_conventions;
236 } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
237 state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
238 state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
239 } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
240 state->EXT_texture_array_enable = (ext_mode != extension_disable);
241 state->EXT_texture_array_warn = (ext_mode == extension_warn);
243 unsupported = !state->extensions->EXT_texture_array;
244 } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
245 if (state->target != fragment_shader) {
248 state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
249 state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
250 unsupported = !state->extensions->ARB_shader_stencil_export;
252 } else if (strcmp(name, "GL_AMD_conservative_depth") == 0) {
253 /* The AMD_conservative spec does not forbid requiring the extension in
256 state->AMD_conservative_depth_enable = (ext_mode != extension_disable);
257 state->AMD_conservative_depth_warn = (ext_mode == extension_warn);
258 unsupported = !state->extensions->AMD_conservative_depth;
259 } else if (strcmp(name, "GL_OES_texture_3D") == 0 && state->es_shader) {
260 state->OES_texture_3D_enable = (ext_mode != extension_disable);
261 state->OES_texture_3D_warn = (ext_mode == extension_warn);
263 unsupported = !state->extensions->EXT_texture3D;
269 static const char *const fmt = "extension `%s' unsupported in %s shader";
271 if (ext_mode == extension_require) {
272 _mesa_glsl_error(name_locp, state, fmt,
273 name, _mesa_glsl_shader_target_name(state->target));
276 _mesa_glsl_warning(name_locp, state, fmt,
277 name, _mesa_glsl_shader_target_name(state->target));
285 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
287 if (q->flags.q.constant)
290 if (q->flags.q.invariant)
291 printf("invariant ");
293 if (q->flags.q.attribute)
294 printf("attribute ");
296 if (q->flags.q.varying)
299 if (q->flags.q.in && q->flags.q.out)
309 if (q->flags.q.centroid)
311 if (q->flags.q.uniform)
313 if (q->flags.q.smooth)
317 if (q->flags.q.noperspective)
318 printf("noperspective ");
323 ast_node::print(void) const
325 printf("unhandled node ");
329 ast_node::ast_node(void)
331 this->location.source = 0;
332 this->location.line = 0;
333 this->location.column = 0;
338 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
352 ast_compound_statement::print(void) const
356 foreach_list_const(n, &this->statements) {
357 ast_node *ast = exec_node_data(ast_node, n, link);
365 ast_compound_statement::ast_compound_statement(int new_scope,
366 ast_node *statements)
368 this->new_scope = new_scope;
370 if (statements != NULL) {
371 this->statements.push_degenerate_list_at_head(&statements->link);
377 ast_expression::print(void) const
391 subexpressions[0]->print();
392 printf("%s ", operator_string(oper));
393 subexpressions[1]->print();
396 case ast_field_selection:
397 subexpressions[0]->print();
398 printf(". %s ", primary_expression.identifier);
407 printf("%s ", operator_string(oper));
408 subexpressions[0]->print();
413 subexpressions[0]->print();
414 printf("%s ", operator_string(oper));
417 case ast_conditional:
418 subexpressions[0]->print();
420 subexpressions[1]->print();
422 subexpressions[1]->print();
425 case ast_array_index:
426 subexpressions[0]->print();
428 subexpressions[1]->print();
432 case ast_function_call: {
433 subexpressions[0]->print();
436 foreach_list_const (n, &this->expressions) {
437 if (n != this->expressions.get_head())
440 ast_node *ast = exec_node_data(ast_node, n, link);
449 printf("%s ", primary_expression.identifier);
452 case ast_int_constant:
453 printf("%d ", primary_expression.int_constant);
456 case ast_uint_constant:
457 printf("%u ", primary_expression.uint_constant);
460 case ast_float_constant:
461 printf("%f ", primary_expression.float_constant);
464 case ast_bool_constant:
466 primary_expression.bool_constant
472 foreach_list_const(n, & this->expressions) {
473 if (n != this->expressions.get_head())
476 ast_node *ast = exec_node_data(ast_node, n, link);
489 ast_expression::ast_expression(int oper,
494 this->oper = ast_operators(oper);
495 this->subexpressions[0] = ex0;
496 this->subexpressions[1] = ex1;
497 this->subexpressions[2] = ex2;
502 ast_expression_statement::print(void) const
511 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
519 ast_function::print(void) const
521 return_type->print();
522 printf(" %s (", identifier);
524 foreach_list_const(n, & this->parameters) {
525 ast_node *ast = exec_node_data(ast_node, n, link);
533 ast_function::ast_function(void)
534 : is_definition(false), signature(NULL)
541 ast_fully_specified_type::print(void) const
543 _mesa_ast_type_qualifier_print(& qualifier);
549 ast_parameter_declarator::print(void) const
553 printf("%s ", identifier);
554 ast_opt_array_size_print(is_array, array_size);
559 ast_function_definition::print(void) const
567 ast_declaration::print(void) const
569 printf("%s ", identifier);
570 ast_opt_array_size_print(is_array, array_size);
574 initializer->print();
579 ast_declaration::ast_declaration(char *identifier, int is_array,
580 ast_expression *array_size,
581 ast_expression *initializer)
583 this->identifier = identifier;
584 this->is_array = is_array;
585 this->array_size = array_size;
586 this->initializer = initializer;
591 ast_declarator_list::print(void) const
593 assert(type || invariant);
598 printf("invariant ");
600 foreach_list_const (ptr, & this->declarations) {
601 if (ptr != this->declarations.get_head())
604 ast_node *ast = exec_node_data(ast_node, ptr, link);
612 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
615 this->invariant = false;
619 ast_jump_statement::print(void) const
623 printf("continue; ");
630 if (opt_return_value)
631 opt_return_value->print();
642 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
644 this->mode = ast_jump_modes(mode);
646 if (mode == ast_return)
647 opt_return_value = return_value;
652 ast_selection_statement::print(void) const
658 then_statement->print();
660 if (else_statement) {
662 else_statement->print();
668 ast_selection_statement::ast_selection_statement(ast_expression *condition,
669 ast_node *then_statement,
670 ast_node *else_statement)
672 this->condition = condition;
673 this->then_statement = then_statement;
674 this->else_statement = else_statement;
679 ast_iteration_statement::print(void) const
685 init_statement->print();
693 rest_expression->print();
719 ast_iteration_statement::ast_iteration_statement(int mode,
722 ast_expression *rest_expression,
725 this->mode = ast_iteration_modes(mode);
726 this->init_statement = init;
727 this->condition = condition;
728 this->rest_expression = rest_expression;
734 ast_struct_specifier::print(void) const
736 printf("struct %s { ", name);
737 foreach_list_const(n, &this->declarations) {
738 ast_node *ast = exec_node_data(ast_node, n, link);
745 ast_struct_specifier::ast_struct_specifier(char *identifier,
746 ast_node *declarator_list)
748 if (identifier == NULL) {
749 static unsigned anon_count = 1;
750 identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
754 this->declarations.push_degenerate_list_at_head(&declarator_list->link);
758 do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
760 GLboolean progress = GL_FALSE;
762 progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
765 progress = do_function_inlining(ir) || progress;
766 progress = do_dead_functions(ir) || progress;
768 progress = do_structure_splitting(ir) || progress;
769 progress = do_if_simplification(ir) || progress;
770 progress = do_discard_simplification(ir) || progress;
771 progress = do_copy_propagation(ir) || progress;
772 /*progress = do_copy_propagation_elements(ir) || progress;*/
774 progress = do_dead_code(ir) || progress;
776 progress = do_dead_code_unlinked(ir) || progress;
777 progress = do_dead_code_local(ir) || progress;
778 progress = do_tree_grafting(ir) || progress;
779 progress = do_constant_propagation(ir) || progress;
781 progress = do_constant_variable(ir) || progress;
783 progress = do_constant_variable_unlinked(ir) || progress;
784 progress = do_constant_folding(ir) || progress;
785 progress = do_algebraic(ir) || progress;
786 progress = do_lower_jumps(ir) || progress;
787 progress = do_vec_index_to_swizzle(ir) || progress;
788 progress = do_swizzle_swizzle(ir) || progress;
789 progress = do_noop_swizzle(ir) || progress;
791 progress = optimize_redundant_jumps(ir) || progress;
793 loop_state *ls = analyze_loop_variables(ir);
794 if (ls->loop_found) {
795 progress = set_loop_controls(ir, ls) || progress;
796 progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
806 * To be called at GL teardown time, this frees compiler datastructures.
808 * After calling this, any previously compiled shaders and shader
809 * programs would be invalid. So this should happen at approximately
813 _mesa_destroy_shader_compiler(void)
815 _mesa_destroy_shader_compiler_caches();
817 _mesa_glsl_release_types();
821 * Releases compiler caches to trade off performance for memory.
823 * Intended to be used with glReleaseShaderCompiler().
826 _mesa_destroy_shader_compiler_caches(void)
828 _mesa_glsl_release_functions();