src/compiler/glsl/test_optpass.cpp

   1 /*
   2  * Copyright © 2011 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  * \file test_optpass.cpp
  26  *
  27  * Standalone test for optimization passes.
  28  *
  29  * This file provides the "optpass" command for the standalone
  30  * glsl_test app.  It accepts either GLSL or high-level IR as input,
  31  * and performs the optimiation passes specified on the command line.
  32  * It outputs the IR, both before and after optimiations.
  33  */
  34
  35 #include <string>
  36 #include <iostream>
  37 #include <sstream>
  38 #include <getopt.h>
  39
  40 #include "ast.h"
  41 #include "ir_optimization.h"
  42 #include "program.h"
  43 #include "ir_reader.h"
  44 #include "standalone_scaffolding.h"
  45 #include "main/mtypes.h"
  46
  47 using namespace std;
  48
  49 static string read_stdin_to_eof()
  50 {
  51    stringbuf sb;
  52    cin.get(sb, '\0');
  53    return sb.str();
  54 }
  55
  56 static GLboolean
  57 do_optimization(struct exec_list *ir, const char *optimization,
  58                 const struct gl_shader_compiler_options *options)
  59 {
  60    int int_0;
  61    int int_1;
  62    int int_2;
  63    int int_3;
  64    int int_4;
  65
  66    if (sscanf(optimization, "do_common_optimization ( %d ) ", &int_0) == 1) {
  67       return do_common_optimization(ir, int_0 != 0, false, options, true);
  68    } else if (strcmp(optimization, "do_algebraic") == 0) {
  69       return do_algebraic(ir, true, options);
  70    } else if (strcmp(optimization, "do_constant_folding") == 0) {
  71       return do_constant_folding(ir);
  72    } else if (strcmp(optimization, "do_constant_variable") == 0) {
  73       return do_constant_variable(ir);
  74    } else if (strcmp(optimization, "do_constant_variable_unlinked") == 0) {
  75       return do_constant_variable_unlinked(ir);
  76    } else if (strcmp(optimization, "do_copy_propagation_elements") == 0) {
  77       return do_copy_propagation_elements(ir);
  78    } else if (strcmp(optimization, "do_constant_propagation") == 0) {
  79       return do_constant_propagation(ir);
  80    } else if (strcmp(optimization, "do_dead_code") == 0) {
  81       return do_dead_code(ir, false);
  82    } else if (strcmp(optimization, "do_dead_code_local") == 0) {
  83       return do_dead_code_local(ir);
  84    } else if (strcmp(optimization, "do_dead_code_unlinked") == 0) {
  85       return do_dead_code_unlinked(ir);
  86    } else if (strcmp(optimization, "do_dead_functions") == 0) {
  87       return do_dead_functions(ir);
  88    } else if (strcmp(optimization, "do_function_inlining") == 0) {
  89       return do_function_inlining(ir);
  90    } else if (sscanf(optimization,
  91                      "do_lower_jumps ( %d , %d , %d , %d , %d ) ",
  92                      &int_0, &int_1, &int_2, &int_3, &int_4) == 5) {
  93       return do_lower_jumps(ir, int_0 != 0, int_1 != 0, int_2 != 0,
  94                             int_3 != 0, int_4 != 0);
  95    } else if (strcmp(optimization, "do_lower_texture_projection") == 0) {
  96       return do_lower_texture_projection(ir);
  97    } else if (strcmp(optimization, "do_if_simplification") == 0) {
  98       return do_if_simplification(ir);
  99    } else if (sscanf(optimization, "lower_if_to_cond_assign ( %d ) ",
 100                      &int_0) == 1) {
 101       return lower_if_to_cond_assign(MESA_SHADER_VERTEX, ir, int_0);
 102    } else if (strcmp(optimization, "do_mat_op_to_vec") == 0) {
 103       return do_mat_op_to_vec(ir);
 104    } else if (strcmp(optimization, "optimize_swizzles") == 0) {
 105       return optimize_swizzles(ir);
 106    } else if (strcmp(optimization, "do_structure_splitting") == 0) {
 107       return do_structure_splitting(ir);
 108    } else if (strcmp(optimization, "do_tree_grafting") == 0) {
 109       return do_tree_grafting(ir);
 110    } else if (strcmp(optimization, "do_vec_index_to_cond_assign") == 0) {
 111       return do_vec_index_to_cond_assign(ir);
 112    } else if (strcmp(optimization, "do_vec_index_to_swizzle") == 0) {
 113       return do_vec_index_to_swizzle(ir);
 114    } else if (strcmp(optimization, "lower_discard") == 0) {
 115       return lower_discard(ir);
 116    } else if (sscanf(optimization, "lower_instructions ( %d ) ",
 117                      &int_0) == 1) {
 118       return lower_instructions(ir, int_0);
 119    } else if (sscanf(optimization, "lower_variable_index_to_cond_assign "
 120                      "( %d , %d , %d , %d ) ", &int_0, &int_1, &int_2,
 121                      &int_3) == 4) {
 122       return lower_variable_index_to_cond_assign(MESA_SHADER_VERTEX, ir,
 123                                                  int_0 != 0, int_1 != 0,
 124                                                  int_2 != 0, int_3 != 0);
 125    } else if (sscanf(optimization, "lower_quadop_vector ( %d ) ",
 126                      &int_0) == 1) {
 127       return lower_quadop_vector(ir, int_0 != 0);
 128    } else if (strcmp(optimization, "optimize_redundant_jumps") == 0) {
 129       return optimize_redundant_jumps(ir);
 130    } else {
 131       printf("Unrecognized optimization %s\n", optimization);
 132       exit(EXIT_FAILURE);
 133       return false;
 134    }
 135 }
 136
 137 static GLboolean
 138 do_optimization_passes(struct exec_list *ir, char **optimizations,
 139                        int num_optimizations, bool quiet,
 140                        const struct gl_shader_compiler_options *options)
 141 {
 142    GLboolean overall_progress = false;
 143
 144    for (int i = 0; i < num_optimizations; ++i) {
 145       const char *optimization = optimizations[i];
 146       if (!quiet) {
 147          printf("*** Running optimization %s...", optimization);
 148       }
 149       GLboolean progress = do_optimization(ir, optimization, options);
 150       if (!quiet) {
 151          printf("%s\n", progress ? "progress" : "no progress");
 152       }
 153       validate_ir_tree(ir);
 154
 155       overall_progress = overall_progress || progress;
 156    }
 157
 158    return overall_progress;
 159 }
 160
 161 int test_optpass(int argc, char **argv)
 162 {
 163    int input_format_ir = 0; /* 0=glsl, 1=ir */
 164    int loop = 0;
 165    int shader_type = GL_VERTEX_SHADER;
 166    int quiet = 0;
 167    int error;
 168
 169    const struct option optpass_opts[] = {
 170       { "input-ir", no_argument, &input_format_ir, 1 },
 171       { "input-glsl", no_argument, &input_format_ir, 0 },
 172       { "loop", no_argument, &loop, 1 },
 173       { "vertex-shader", no_argument, &shader_type, GL_VERTEX_SHADER },
 174       { "fragment-shader", no_argument, &shader_type, GL_FRAGMENT_SHADER },
 175       { "quiet", no_argument, &quiet, 1 },
 176       { NULL, 0, NULL, 0 }
 177    };
 178
 179    int idx = 0;
 180    int c;
 181    while ((c = getopt_long(argc, argv, "", optpass_opts, &idx)) != -1) {
 182       if (c != 0) {
 183          printf("*** usage: %s optpass <optimizations> <options>\n", argv[0]);
 184          printf("\n");
 185          printf("Possible options are:\n");
 186          printf("  --input-ir: input format is IR\n");
 187          printf("  --input-glsl: input format is GLSL (the default)\n");
 188          printf("  --loop: run optimizations repeatedly until no progress\n");
 189          printf("  --vertex-shader: test with a vertex shader (the default)\n");
 190          printf("  --fragment-shader: test with a fragment shader\n");
 191          exit(EXIT_FAILURE);
 192       }
 193    }
 194
 195    struct gl_context local_ctx;
 196    struct gl_context *ctx = &local_ctx;
 197    initialize_context_to_defaults(ctx, API_OPENGL_COMPAT);
 198
 199    ir_variable::temporaries_allocate_names = true;
 200
 201    struct gl_shader *shader = rzalloc(NULL, struct gl_shader);
 202    shader->Type = shader_type;
 203    shader->Stage = _mesa_shader_enum_to_shader_stage(shader_type);
 204
 205    string input = read_stdin_to_eof();
 206
 207    struct _mesa_glsl_parse_state *state
 208       = new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
 209
 210    if (input_format_ir) {
 211       shader->ir = new(shader) exec_list;
 212       _mesa_glsl_initialize_types(state);
 213       _mesa_glsl_read_ir(state, shader->ir, input.c_str(), true);
 214    } else {
 215       shader->Source = input.c_str();
 216       const char *source = shader->Source;
 217       state->error = glcpp_preprocess(state, &source, &state->info_log,
 218                                       NULL, NULL, ctx) != 0;
 219
 220       if (!state->error) {
 221          _mesa_glsl_lexer_ctor(state, source);
 222          _mesa_glsl_parse(state);
 223          _mesa_glsl_lexer_dtor(state);
 224       }
 225
 226       shader->ir = new(shader) exec_list;
 227       if (!state->error && !state->translation_unit.is_empty())
 228          _mesa_ast_to_hir(shader->ir, state);
 229    }
 230
 231    /* Print out the initial IR */
 232    if (!state->error && !quiet) {
 233       printf("*** pre-optimization IR:\n");
 234       _mesa_print_ir(stdout, shader->ir, state);
 235       printf("\n--\n");
 236    }
 237
 238    /* Optimization passes */
 239    if (!state->error) {
 240       GLboolean progress;
 241       const struct gl_shader_compiler_options *options =
 242          &ctx->Const.ShaderCompilerOptions[_mesa_shader_enum_to_shader_stage(shader_type)];
 243       do {
 244          progress = do_optimization_passes(shader->ir, &argv[optind],
 245                                            argc - optind, quiet != 0, options);
 246       } while (loop && progress);
 247    }
 248
 249    /* Print out the resulting IR */
 250    if (!state->error) {
 251       if (!quiet) {
 252          printf("*** resulting IR:\n");
 253       }
 254       _mesa_print_ir(stdout, shader->ir, state);
 255       if (!quiet) {
 256          printf("\n--\n");
 257       }
 258    }
 259
 260    if (state->error) {
 261       printf("*** error(s) occurred:\n");
 262       printf("%s\n", state->info_log);
 263       printf("--\n");
 264    }
 265
 266    error = state->error;
 267
 268    ralloc_free(state);
 269    ralloc_free(shader);
 270
 271    return error;
 272 }
 273