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  1. /*
  2.  * Copyright © 2010 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.  
  24.  
  25. /**
  26.  * \file ir_optimization.h
  27.  *
  28.  * Prototypes for optimization passes to be called by the compiler and drivers.
  29.  */
  30.  
  31. /* Operations for lower_instructions() */
  32. #define SUB_TO_ADD_NEG     0x01
  33. #define DIV_TO_MUL_RCP     0x02
  34. #define EXP_TO_EXP2        0x04
  35. #define POW_TO_EXP2        0x08
  36. #define LOG_TO_LOG2        0x10
  37. #define MOD_TO_FRACT       0x20
  38. #define INT_DIV_TO_MUL_RCP 0x40
  39. #define LRP_TO_ARITH       0x80
  40. #define BITFIELD_INSERT_TO_BFM_BFI 0x100
  41.  
  42. /**
  43.  * \see class lower_packing_builtins_visitor
  44.  */
  45. enum lower_packing_builtins_op {
  46.    LOWER_PACK_UNPACK_NONE               = 0x0000,
  47.  
  48.    LOWER_PACK_SNORM_2x16                = 0x0001,
  49.    LOWER_UNPACK_SNORM_2x16              = 0x0002,
  50.  
  51.    LOWER_PACK_UNORM_2x16                = 0x0004,
  52.    LOWER_UNPACK_UNORM_2x16              = 0x0008,
  53.  
  54.    LOWER_PACK_HALF_2x16                 = 0x0010,
  55.    LOWER_UNPACK_HALF_2x16               = 0x0020,
  56.  
  57.    LOWER_PACK_HALF_2x16_TO_SPLIT        = 0x0040,
  58.    LOWER_UNPACK_HALF_2x16_TO_SPLIT      = 0x0080,
  59.  
  60.    LOWER_PACK_SNORM_4x8                 = 0x0100,
  61.    LOWER_UNPACK_SNORM_4x8               = 0x0200,
  62.  
  63.    LOWER_PACK_UNORM_4x8                 = 0x0400,
  64.    LOWER_UNPACK_UNORM_4x8               = 0x0800
  65. };
  66.  
  67. bool do_common_optimization(exec_list *ir, bool linked,
  68.                             bool uniform_locations_assigned,
  69.                             unsigned max_unroll_iterations,
  70.                             const struct gl_shader_compiler_options *options);
  71.  
  72. bool do_algebraic(exec_list *instructions);
  73. bool do_constant_folding(exec_list *instructions);
  74. bool do_constant_variable(exec_list *instructions);
  75. bool do_constant_variable_unlinked(exec_list *instructions);
  76. bool do_copy_propagation(exec_list *instructions);
  77. bool do_copy_propagation_elements(exec_list *instructions);
  78. bool do_constant_propagation(exec_list *instructions);
  79. void do_dead_builtin_varyings(struct gl_context *ctx,
  80.                               gl_shader *producer, gl_shader *consumer,
  81.                               unsigned num_tfeedback_decls,
  82.                               class tfeedback_decl *tfeedback_decls);
  83. bool do_dead_code(exec_list *instructions, bool uniform_locations_assigned);
  84. bool do_dead_code_local(exec_list *instructions);
  85. bool do_dead_code_unlinked(exec_list *instructions);
  86. bool do_dead_functions(exec_list *instructions);
  87. bool opt_flip_matrices(exec_list *instructions);
  88. bool do_function_inlining(exec_list *instructions);
  89. bool do_lower_jumps(exec_list *instructions, bool pull_out_jumps = true, bool lower_sub_return = true, bool lower_main_return = false, bool lower_continue = false, bool lower_break = false);
  90. bool do_lower_texture_projection(exec_list *instructions);
  91. bool do_if_simplification(exec_list *instructions);
  92. bool opt_flatten_nested_if_blocks(exec_list *instructions);
  93. bool do_discard_simplification(exec_list *instructions);
  94. bool lower_if_to_cond_assign(exec_list *instructions, unsigned max_depth = 0);
  95. bool do_mat_op_to_vec(exec_list *instructions);
  96. bool do_noop_swizzle(exec_list *instructions);
  97. bool do_structure_splitting(exec_list *instructions);
  98. bool do_swizzle_swizzle(exec_list *instructions);
  99. bool do_tree_grafting(exec_list *instructions);
  100. bool do_vec_index_to_cond_assign(exec_list *instructions);
  101. bool do_vec_index_to_swizzle(exec_list *instructions);
  102. bool lower_discard(exec_list *instructions);
  103. void lower_discard_flow(exec_list *instructions);
  104. bool lower_instructions(exec_list *instructions, unsigned what_to_lower);
  105. bool lower_noise(exec_list *instructions);
  106. bool lower_variable_index_to_cond_assign(exec_list *instructions,
  107.     bool lower_input, bool lower_output, bool lower_temp, bool lower_uniform);
  108. bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz);
  109. bool lower_clip_distance(gl_shader *shader);
  110. void lower_output_reads(exec_list *instructions);
  111. bool lower_packing_builtins(exec_list *instructions, int op_mask);
  112. void lower_ubo_reference(struct gl_shader *shader, exec_list *instructions);
  113. void lower_packed_varyings(void *mem_ctx, unsigned location_base,
  114.                            unsigned locations_used, ir_variable_mode mode,
  115.                            gl_shader *shader);
  116. bool lower_vector_insert(exec_list *instructions, bool lower_nonconstant_index);
  117. void lower_named_interface_blocks(void *mem_ctx, gl_shader *shader);
  118. bool optimize_redundant_jumps(exec_list *instructions);
  119. bool optimize_split_arrays(exec_list *instructions, bool linked);
  120.  
  121. ir_rvalue *
  122. compare_index_block(exec_list *instructions, ir_variable *index,
  123.                     unsigned base, unsigned components, void *mem_ctx);
  124.