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/*

 * Copyright © 2010 Intel Corporation

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

*/

/**

 * \file ir_optimization.h

 * Prototypes for optimization passes to be called by the compiler and drivers.

*/

#ifndef GLSL_IR_OPTIMIZATION_H

#define GLSL_IR_OPTIMIZATION_H

struct gl_linked_shader;

struct gl_shader_program;

/* Operations for lower_instructions() */

#define SUB_TO_ADD_NEG     0x01

#define FDIV_TO_MUL_RCP    0x02

#define EXP_TO_EXP2        0x04

#define POW_TO_EXP2        0x08

#define LOG_TO_LOG2        0x10

#define MOD_TO_FLOOR       0x20

#define INT_DIV_TO_MUL_RCP 0x40

#define LDEXP_TO_ARITH     0x80

#define CARRY_TO_ARITH     0x100

#define BORROW_TO_ARITH    0x200

#define SAT_TO_CLAMP       0x400

#define DOPS_TO_DFRAC      0x800

#define DFREXP_DLDEXP_TO_ARITH    0x1000

#define BIT_COUNT_TO_MATH         0x02000

#define EXTRACT_TO_SHIFTS         0x04000

#define INSERT_TO_SHIFTS          0x08000

#define REVERSE_TO_SHIFTS         0x10000

#define FIND_LSB_TO_FLOAT_CAST    0x20000

#define FIND_MSB_TO_FLOAT_CAST    0x40000

#define IMUL_HIGH_TO_MUL          0x80000

#define DDIV_TO_MUL_RCP           0x100000

#define DIV_TO_MUL_RCP            (FDIV_TO_MUL_RCP | DDIV_TO_MUL_RCP)

#define SQRT_TO_ABS_SQRT          0x200000

#define MUL64_TO_MUL_AND_MUL_HIGH 0x400000

/* Opertaions for lower_64bit_integer_instructions() */

#define MUL64                     (1U << 0)

#define SIGN64                    (1U << 1)

#define DIV64                     (1U << 2)

#define MOD64                     (1U << 3)

/**

 * \see class lower_packing_builtins_visitor

*/

enum lower_packing_builtins_op {

   LOWER_PACK_UNPACK_NONE               = 0x0000,

   LOWER_PACK_SNORM_2x16                = 0x0001,

   LOWER_UNPACK_SNORM_2x16              = 0x0002,

   LOWER_PACK_UNORM_2x16                = 0x0004,

   LOWER_UNPACK_UNORM_2x16              = 0x0008,

   LOWER_PACK_HALF_2x16                 = 0x0010,

   LOWER_UNPACK_HALF_2x16               = 0x0020,

   LOWER_PACK_SNORM_4x8                 = 0x0040,

   LOWER_UNPACK_SNORM_4x8               = 0x0080,

   LOWER_PACK_UNORM_4x8                 = 0x0100,

   LOWER_UNPACK_UNORM_4x8               = 0x0200,

   LOWER_PACK_USE_BFI                   = 0x0400,

   LOWER_PACK_USE_BFE                   = 0x0800,

};

bool do_common_optimization(exec_list *ir, bool linked,

			    bool uniform_locations_assigned,

                            const struct gl_shader_compiler_options *options,

                            bool native_integers);

bool ir_constant_fold(ir_rvalue **rvalue);

bool do_rebalance_tree(exec_list *instructions);

bool do_algebraic(exec_list *instructions, bool native_integers,

                  const struct gl_shader_compiler_options *options);

bool opt_conditional_discard(exec_list *instructions);

bool do_constant_folding(exec_list *instructions);

bool do_constant_variable(exec_list *instructions);

bool do_constant_variable_unlinked(exec_list *instructions);

bool do_copy_propagation_elements(exec_list *instructions);

bool do_constant_propagation(exec_list *instructions);

void do_dead_builtin_varyings(struct gl_context *ctx,

                              gl_linked_shader *producer,

                              gl_linked_shader *consumer,

                              unsigned num_tfeedback_decls,

                              class tfeedback_decl *tfeedback_decls);

bool do_dead_code(exec_list *instructions, bool uniform_locations_assigned);

bool do_dead_code_local(exec_list *instructions);

bool do_dead_code_unlinked(exec_list *instructions);

bool do_dead_functions(exec_list *instructions);

bool opt_flip_matrices(exec_list *instructions);

bool do_function_inlining(exec_list *instructions);

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);

bool do_lower_texture_projection(exec_list *instructions);

bool do_if_simplification(exec_list *instructions);

bool opt_flatten_nested_if_blocks(exec_list *instructions);

bool do_discard_simplification(exec_list *instructions);

bool lower_if_to_cond_assign(gl_shader_stage stage, exec_list *instructions,

                             unsigned max_depth = 0, unsigned min_branch_cost = 0);

bool do_mat_op_to_vec(exec_list *instructions);

bool do_minmax_prune(exec_list *instructions);

bool do_structure_splitting(exec_list *instructions);

bool optimize_swizzles(exec_list *instructions);

bool do_vectorize(exec_list *instructions);

bool do_tree_grafting(exec_list *instructions);

bool do_vec_index_to_cond_assign(exec_list *instructions);

bool do_vec_index_to_swizzle(exec_list *instructions);

bool lower_discard(exec_list *instructions);

void lower_discard_flow(exec_list *instructions);

bool lower_instructions(exec_list *instructions, unsigned what_to_lower);

bool lower_variable_index_to_cond_assign(gl_shader_stage stage,

    exec_list *instructions, bool lower_input, bool lower_output,

    bool lower_temp, bool lower_uniform);

bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz);

bool lower_const_arrays_to_uniforms(exec_list *instructions, unsigned stage, unsigned max_uniform_components);

bool lower_clip_cull_distance(struct gl_shader_program *prog,

                              gl_linked_shader *shader);

ir_variable * lower_xfb_varying(void *mem_ctx,

                                gl_linked_shader *shader,

                                const char *old_var_name);

void lower_output_reads(unsigned stage, exec_list *instructions);

bool lower_packing_builtins(exec_list *instructions, int op_mask);

void lower_shared_reference(struct gl_context *ctx,

                            struct gl_shader_program *prog,

                            struct gl_linked_shader *shader);

void lower_ubo_reference(struct gl_linked_shader *shader,

                         bool clamp_block_indices, bool use_std430_as_default);

void lower_packed_varyings(void *mem_ctx,

                           unsigned locations_used,

                           const uint8_t *components,

                           ir_variable_mode mode,

                           unsigned gs_input_vertices,

                           gl_linked_shader *shader,

                           bool disable_varying_packing,

                           bool disable_xfb_packing,

                           bool xfb_enabled);

bool lower_vector_insert(exec_list *instructions, bool lower_nonconstant_index);

bool lower_vector_derefs(gl_linked_shader *shader);

void lower_named_interface_blocks(void *mem_ctx, gl_linked_shader *shader);

bool optimize_redundant_jumps(exec_list *instructions);

bool optimize_split_arrays(exec_list *instructions, bool linked);

bool lower_offset_arrays(exec_list *instructions);

void optimize_dead_builtin_variables(exec_list *instructions,

                                     enum ir_variable_mode other);

bool lower_tess_level(gl_linked_shader *shader);

bool lower_vertex_id(gl_linked_shader *shader);

bool lower_cs_derived(gl_linked_shader *shader);

bool lower_blend_equation_advanced(gl_linked_shader *shader, bool coherent);

bool lower_builtins(exec_list *instructions);

bool lower_subroutine(exec_list *instructions, struct _mesa_glsl_parse_state *state);

void propagate_invariance(exec_list *instructions);

namespace ir_builder { class ir_factory; };

ir_variable *compare_index_block(ir_builder::ir_factory &body,

                                 ir_variable *index,

                                 unsigned base, unsigned components);

bool lower_64bit_integer_instructions(exec_list *instructions,

                                      unsigned what_to_lower);

bool lower_precision(exec_list *instructions);

#endif /* GLSL_IR_OPTIMIZATION_H */