glsl_parser_extras.cpp revision 26b566e19cbfa189a6a158718f21859c0b7ed090 
1/*
2 * Copyright © 2008, 2009 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23#include <stdio.h>
24#include <stdarg.h>
25#include <string.h>
26#include <assert.h>
27
28extern "C" {
29#include "main/core.h" /* for struct gl_context */
30}
31
32#include "ralloc.h"
33#include "ast.h"
34#include "glsl_parser_extras.h"
35#include "glsl_parser.h"
36#include "ir_optimization.h"
37#include "loop_analysis.h"
38
39_mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *ctx,
40					       GLenum target, void *mem_ctx)
41{
42   switch (target) {
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;
46   }
47
48   this->scanner = NULL;
49   this->translation_unit.make_empty();
50   this->symbols = new(mem_ctx) glsl_symbol_table;
51   this->info_log = ralloc_strdup(mem_ctx, "");
52   this->error = false;
53   this->loop_or_switch_nesting = NULL;
54
55   /* Set default language version and extensions */
56   this->language_version = 110;
57   this->es_shader = false;
58   this->ARB_texture_rectangle_enable = true;
59
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;
65   }
66
67   this->extensions = &ctx->Extensions;
68
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;
80
81   this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
82
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.
86    */
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);
94
95   const unsigned lowest_version =
96      (ctx->API == API_OPENGLES2) || ctx->Extensions.ARB_ES2_compatibility
97      ? 100 : 110;
98   const unsigned highest_version =
99      (ctx->API == API_OPENGL) ? ctx->Const.GLSLVersion : 100;
100   char *supported = ralloc_strdup(this, "");
101
102   for (unsigned ver = lowest_version; ver <= highest_version; ver += 10) {
103      const char *const prefix = (ver == lowest_version)
104	 ? ""
105	 : ((ver == highest_version) ? ", and " : ", ");
106
107      ralloc_asprintf_append(& supported, "%s%d.%02d%s",
108			     prefix,
109			     ver / 100, ver % 100,
110			     (ver == 100) ? " ES" : "");
111   }
112
113   this->supported_version_string = supported;
114}
115
116const char *
117_mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
118{
119   switch (target) {
120   case vertex_shader:   return "vertex";
121   case fragment_shader: return "fragment";
122   case geometry_shader: return "geometry";
123   }
124
125   assert(!"Should not get here.");
126   return "unknown";
127}
128
129
130void
131_mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
132		 const char *fmt, ...)
133{
134   va_list ap;
135
136   state->error = true;
137
138   assert(state->info_log != NULL);
139   ralloc_asprintf_append(&state->info_log, "%u:%u(%u): error: ",
140					    locp->source,
141					    locp->first_line,
142					    locp->first_column);
143   va_start(ap, fmt);
144   ralloc_vasprintf_append(&state->info_log, fmt, ap);
145   va_end(ap);
146   ralloc_strcat(&state->info_log, "\n");
147}
148
149
150void
151_mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
152		   const char *fmt, ...)
153{
154   va_list ap;
155
156   assert(state->info_log != NULL);
157   ralloc_asprintf_append(&state->info_log, "%u:%u(%u): warning: ",
158					    locp->source,
159					    locp->first_line,
160					    locp->first_column);
161   va_start(ap, fmt);
162   ralloc_vasprintf_append(&state->info_log, fmt, ap);
163   va_end(ap);
164   ralloc_strcat(&state->info_log, "\n");
165}
166
167
168bool
169_mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
170			     const char *behavior, YYLTYPE *behavior_locp,
171			     _mesa_glsl_parse_state *state)
172{
173   enum {
174      extension_disable,
175      extension_enable,
176      extension_require,
177      extension_warn
178   } ext_mode;
179
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;
188   } else {
189      _mesa_glsl_error(behavior_locp, state,
190		       "Unknown extension behavior `%s'",
191		       behavior);
192      return false;
193   }
194
195   bool unsupported = false;
196
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");
202	 return false;
203      }
204   } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
205      /* This extension is only supported in fragment shaders.
206       */
207      if (state->target != fragment_shader) {
208	 unsupported = true;
209      } else {
210	 state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
211	 state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
212      }
213   } else if (strcmp(name, "GL_ARB_draw_instanced") == 0) {
214      state->ARB_draw_instanced_enable = (ext_mode != extension_disable);
215      state->ARB_draw_instanced_warn = (ext_mode == extension_warn);
216
217      /* This extension is only supported in vertex shaders.
218       */
219      unsupported = (state->target != vertex_shader)
220	 ||  !state->extensions->ARB_draw_instanced;
221   } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {
222      state->ARB_explicit_attrib_location_enable =
223	 (ext_mode != extension_disable);
224      state->ARB_explicit_attrib_location_warn =
225	 (ext_mode == extension_warn);
226
227      unsupported = !state->extensions->ARB_explicit_attrib_location;
228   } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {
229      state->ARB_fragment_coord_conventions_enable =
230	 (ext_mode != extension_disable);
231      state->ARB_fragment_coord_conventions_warn =
232	 (ext_mode == extension_warn);
233
234      unsupported = !state->extensions->ARB_fragment_coord_conventions;
235   } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
236      state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
237      state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
238   } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
239      state->EXT_texture_array_enable = (ext_mode != extension_disable);
240      state->EXT_texture_array_warn = (ext_mode == extension_warn);
241
242      unsupported = !state->extensions->EXT_texture_array;
243   } else if (strcmp(name, "GL_ARB_shader_texture_lod") == 0) {
244      /* Force ARB_texture_rectangle to be on so sampler2DRects are defined */
245      state->ARB_texture_rectangle_enable = true;
246
247      state->ARB_shader_texture_lod_enable = (ext_mode != extension_disable);
248      state->ARB_shader_texture_lod_warn = (ext_mode == extension_warn);
249
250      unsupported = !state->extensions->ARB_shader_texture_lod;
251   } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
252      state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
253      state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
254
255      /* This extension is only supported in fragment shaders.
256       */
257      unsupported = (state->target != fragment_shader)
258	 || !state->extensions->ARB_shader_stencil_export;
259   } else if (strcmp(name, "GL_AMD_conservative_depth") == 0) {
260      /* The AMD_conservative spec does not forbid requiring the extension in
261       * the vertex shader.
262       */
263      state->AMD_conservative_depth_enable = (ext_mode != extension_disable);
264      state->AMD_conservative_depth_warn = (ext_mode == extension_warn);
265      unsupported = !state->extensions->AMD_conservative_depth;
266   } else if (strcmp(name, "GL_AMD_shader_stencil_export") == 0) {
267      state->AMD_shader_stencil_export_enable = (ext_mode != extension_disable);
268      state->AMD_shader_stencil_export_warn = (ext_mode == extension_warn);
269
270      /* This extension is only supported in fragment shaders.
271       * Both the ARB and AMD variants share the same ARB flag
272       * in gl_extensions.
273       */
274      unsupported = (state->target != fragment_shader)
275	 || !state->extensions->ARB_shader_stencil_export;
276   } else if (strcmp(name, "GL_OES_texture_3D") == 0 && state->es_shader) {
277      state->OES_texture_3D_enable = (ext_mode != extension_disable);
278      state->OES_texture_3D_warn = (ext_mode == extension_warn);
279
280      unsupported = !state->extensions->EXT_texture3D;
281   } else {
282      unsupported = true;
283   }
284
285   if (unsupported) {
286      static const char *const fmt = "extension `%s' unsupported in %s shader";
287
288      if (ext_mode == extension_require) {
289	 _mesa_glsl_error(name_locp, state, fmt,
290			  name, _mesa_glsl_shader_target_name(state->target));
291	 return false;
292      } else {
293	 _mesa_glsl_warning(name_locp, state, fmt,
294			    name, _mesa_glsl_shader_target_name(state->target));
295      }
296   }
297
298   return true;
299}
300
301void
302_mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
303{
304   if (q->flags.q.constant)
305      printf("const ");
306
307   if (q->flags.q.invariant)
308      printf("invariant ");
309
310   if (q->flags.q.attribute)
311      printf("attribute ");
312
313   if (q->flags.q.varying)
314      printf("varying ");
315
316   if (q->flags.q.in && q->flags.q.out)
317      printf("inout ");
318   else {
319      if (q->flags.q.in)
320	 printf("in ");
321
322      if (q->flags.q.out)
323	 printf("out ");
324   }
325
326   if (q->flags.q.centroid)
327      printf("centroid ");
328   if (q->flags.q.uniform)
329      printf("uniform ");
330   if (q->flags.q.smooth)
331      printf("smooth ");
332   if (q->flags.q.flat)
333      printf("flat ");
334   if (q->flags.q.noperspective)
335      printf("noperspective ");
336}
337
338
339void
340ast_node::print(void) const
341{
342   printf("unhandled node ");
343}
344
345
346ast_node::ast_node(void)
347{
348   this->location.source = 0;
349   this->location.line = 0;
350   this->location.column = 0;
351}
352
353
354static void
355ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
356{
357   if (is_array) {
358      printf("[ ");
359
360      if (array_size)
361	 array_size->print();
362
363      printf("] ");
364   }
365}
366
367
368void
369ast_compound_statement::print(void) const
370{
371   printf("{\n");
372
373   foreach_list_const(n, &this->statements) {
374      ast_node *ast = exec_node_data(ast_node, n, link);
375      ast->print();
376   }
377
378   printf("}\n");
379}
380
381
382ast_compound_statement::ast_compound_statement(int new_scope,
383					       ast_node *statements)
384{
385   this->new_scope = new_scope;
386
387   if (statements != NULL) {
388      this->statements.push_degenerate_list_at_head(&statements->link);
389   }
390}
391
392
393void
394ast_expression::print(void) const
395{
396   switch (oper) {
397   case ast_assign:
398   case ast_mul_assign:
399   case ast_div_assign:
400   case ast_mod_assign:
401   case ast_add_assign:
402   case ast_sub_assign:
403   case ast_ls_assign:
404   case ast_rs_assign:
405   case ast_and_assign:
406   case ast_xor_assign:
407   case ast_or_assign:
408      subexpressions[0]->print();
409      printf("%s ", operator_string(oper));
410      subexpressions[1]->print();
411      break;
412
413   case ast_field_selection:
414      subexpressions[0]->print();
415      printf(". %s ", primary_expression.identifier);
416      break;
417
418   case ast_plus:
419   case ast_neg:
420   case ast_bit_not:
421   case ast_logic_not:
422   case ast_pre_inc:
423   case ast_pre_dec:
424      printf("%s ", operator_string(oper));
425      subexpressions[0]->print();
426      break;
427
428   case ast_post_inc:
429   case ast_post_dec:
430      subexpressions[0]->print();
431      printf("%s ", operator_string(oper));
432      break;
433
434   case ast_conditional:
435      subexpressions[0]->print();
436      printf("? ");
437      subexpressions[1]->print();
438      printf(": ");
439      subexpressions[2]->print();
440      break;
441
442   case ast_array_index:
443      subexpressions[0]->print();
444      printf("[ ");
445      subexpressions[1]->print();
446      printf("] ");
447      break;
448
449   case ast_function_call: {
450      subexpressions[0]->print();
451      printf("( ");
452
453      foreach_list_const (n, &this->expressions) {
454	 if (n != this->expressions.get_head())
455	    printf(", ");
456
457	 ast_node *ast = exec_node_data(ast_node, n, link);
458	 ast->print();
459      }
460
461      printf(") ");
462      break;
463   }
464
465   case ast_identifier:
466      printf("%s ", primary_expression.identifier);
467      break;
468
469   case ast_int_constant:
470      printf("%d ", primary_expression.int_constant);
471      break;
472
473   case ast_uint_constant:
474      printf("%u ", primary_expression.uint_constant);
475      break;
476
477   case ast_float_constant:
478      printf("%f ", primary_expression.float_constant);
479      break;
480
481   case ast_bool_constant:
482      printf("%s ",
483	     primary_expression.bool_constant
484	     ? "true" : "false");
485      break;
486
487   case ast_sequence: {
488      printf("( ");
489      foreach_list_const(n, & this->expressions) {
490	 if (n != this->expressions.get_head())
491	    printf(", ");
492
493	 ast_node *ast = exec_node_data(ast_node, n, link);
494	 ast->print();
495      }
496      printf(") ");
497      break;
498   }
499
500   default:
501      assert(0);
502      break;
503   }
504}
505
506ast_expression::ast_expression(int oper,
507			       ast_expression *ex0,
508			       ast_expression *ex1,
509			       ast_expression *ex2)
510{
511   this->oper = ast_operators(oper);
512   this->subexpressions[0] = ex0;
513   this->subexpressions[1] = ex1;
514   this->subexpressions[2] = ex2;
515}
516
517
518void
519ast_expression_statement::print(void) const
520{
521   if (expression)
522      expression->print();
523
524   printf("; ");
525}
526
527
528ast_expression_statement::ast_expression_statement(ast_expression *ex) :
529   expression(ex)
530{
531   /* empty */
532}
533
534
535void
536ast_function::print(void) const
537{
538   return_type->print();
539   printf(" %s (", identifier);
540
541   foreach_list_const(n, & this->parameters) {
542      ast_node *ast = exec_node_data(ast_node, n, link);
543      ast->print();
544   }
545
546   printf(")");
547}
548
549
550ast_function::ast_function(void)
551   : is_definition(false), signature(NULL)
552{
553   /* empty */
554}
555
556
557void
558ast_fully_specified_type::print(void) const
559{
560   _mesa_ast_type_qualifier_print(& qualifier);
561   specifier->print();
562}
563
564
565void
566ast_parameter_declarator::print(void) const
567{
568   type->print();
569   if (identifier)
570      printf("%s ", identifier);
571   ast_opt_array_size_print(is_array, array_size);
572}
573
574
575void
576ast_function_definition::print(void) const
577{
578   prototype->print();
579   body->print();
580}
581
582
583void
584ast_declaration::print(void) const
585{
586   printf("%s ", identifier);
587   ast_opt_array_size_print(is_array, array_size);
588
589   if (initializer) {
590      printf("= ");
591      initializer->print();
592   }
593}
594
595
596ast_declaration::ast_declaration(char *identifier, int is_array,
597				 ast_expression *array_size,
598				 ast_expression *initializer)
599{
600   this->identifier = identifier;
601   this->is_array = is_array;
602   this->array_size = array_size;
603   this->initializer = initializer;
604}
605
606
607void
608ast_declarator_list::print(void) const
609{
610   assert(type || invariant);
611
612   if (type)
613      type->print();
614   else
615      printf("invariant ");
616
617   foreach_list_const (ptr, & this->declarations) {
618      if (ptr != this->declarations.get_head())
619	 printf(", ");
620
621      ast_node *ast = exec_node_data(ast_node, ptr, link);
622      ast->print();
623   }
624
625   printf("; ");
626}
627
628
629ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
630{
631   this->type = type;
632   this->invariant = false;
633}
634
635void
636ast_jump_statement::print(void) const
637{
638   switch (mode) {
639   case ast_continue:
640      printf("continue; ");
641      break;
642   case ast_break:
643      printf("break; ");
644      break;
645   case ast_return:
646      printf("return ");
647      if (opt_return_value)
648	 opt_return_value->print();
649
650      printf("; ");
651      break;
652   case ast_discard:
653      printf("discard; ");
654      break;
655   }
656}
657
658
659ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
660{
661   this->mode = ast_jump_modes(mode);
662
663   if (mode == ast_return)
664      opt_return_value = return_value;
665}
666
667
668void
669ast_selection_statement::print(void) const
670{
671   printf("if ( ");
672   condition->print();
673   printf(") ");
674
675   then_statement->print();
676
677   if (else_statement) {
678      printf("else ");
679      else_statement->print();
680   }
681
682}
683
684
685ast_selection_statement::ast_selection_statement(ast_expression *condition,
686						 ast_node *then_statement,
687						 ast_node *else_statement)
688{
689   this->condition = condition;
690   this->then_statement = then_statement;
691   this->else_statement = else_statement;
692}
693
694
695void
696ast_iteration_statement::print(void) const
697{
698   switch (mode) {
699   case ast_for:
700      printf("for( ");
701      if (init_statement)
702	 init_statement->print();
703      printf("; ");
704
705      if (condition)
706	 condition->print();
707      printf("; ");
708
709      if (rest_expression)
710	 rest_expression->print();
711      printf(") ");
712
713      body->print();
714      break;
715
716   case ast_while:
717      printf("while ( ");
718      if (condition)
719	 condition->print();
720      printf(") ");
721      body->print();
722      break;
723
724   case ast_do_while:
725      printf("do ");
726      body->print();
727      printf("while ( ");
728      if (condition)
729	 condition->print();
730      printf("); ");
731      break;
732   }
733}
734
735
736ast_iteration_statement::ast_iteration_statement(int mode,
737						 ast_node *init,
738						 ast_node *condition,
739						 ast_expression *rest_expression,
740						 ast_node *body)
741{
742   this->mode = ast_iteration_modes(mode);
743   this->init_statement = init;
744   this->condition = condition;
745   this->rest_expression = rest_expression;
746   this->body = body;
747}
748
749
750void
751ast_struct_specifier::print(void) const
752{
753   printf("struct %s { ", name);
754   foreach_list_const(n, &this->declarations) {
755      ast_node *ast = exec_node_data(ast_node, n, link);
756      ast->print();
757   }
758   printf("} ");
759}
760
761
762ast_struct_specifier::ast_struct_specifier(char *identifier,
763					   ast_node *declarator_list)
764{
765   if (identifier == NULL) {
766      static unsigned anon_count = 1;
767      identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
768      anon_count++;
769   }
770   name = identifier;
771   this->declarations.push_degenerate_list_at_head(&declarator_list->link);
772}
773
774bool
775do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
776{
777   GLboolean progress = GL_FALSE;
778
779   progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
780
781   if (linked) {
782      progress = do_function_inlining(ir) || progress;
783      progress = do_dead_functions(ir) || progress;
784   }
785   progress = do_structure_splitting(ir) || progress;
786   progress = do_if_simplification(ir) || progress;
787   progress = do_discard_simplification(ir) || progress;
788   progress = do_copy_propagation(ir) || progress;
789   progress = do_copy_propagation_elements(ir) || progress;
790   if (linked)
791      progress = do_dead_code(ir) || progress;
792   else
793      progress = do_dead_code_unlinked(ir) || progress;
794   progress = do_dead_code_local(ir) || progress;
795   progress = do_tree_grafting(ir) || progress;
796   progress = do_constant_propagation(ir) || progress;
797   if (linked)
798      progress = do_constant_variable(ir) || progress;
799   else
800      progress = do_constant_variable_unlinked(ir) || progress;
801   progress = do_constant_folding(ir) || progress;
802   progress = do_algebraic(ir) || progress;
803   progress = do_lower_jumps(ir) || progress;
804   progress = do_vec_index_to_swizzle(ir) || progress;
805   progress = do_swizzle_swizzle(ir) || progress;
806   progress = do_noop_swizzle(ir) || progress;
807
808   progress = optimize_redundant_jumps(ir) || progress;
809
810   loop_state *ls = analyze_loop_variables(ir);
811   if (ls->loop_found) {
812      progress = set_loop_controls(ir, ls) || progress;
813      progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
814   }
815   delete ls;
816
817   return progress;
818}
819
820extern "C" {
821
822/**
823 * To be called at GL teardown time, this frees compiler datastructures.
824 *
825 * After calling this, any previously compiled shaders and shader
826 * programs would be invalid.  So this should happen at approximately
827 * program exit.
828 */
829void
830_mesa_destroy_shader_compiler(void)
831{
832   _mesa_destroy_shader_compiler_caches();
833
834   _mesa_glsl_release_types();
835}
836
837/**
838 * Releases compiler caches to trade off performance for memory.
839 *
840 * Intended to be used with glReleaseShaderCompiler().
841 */
842void
843_mesa_destroy_shader_compiler_caches(void)
844{
845   _mesa_glsl_release_functions();
846}
847
848}
849