src/amd/compiler/aco_interface.cpp

   1 /*
   2  * Copyright © 2018 Google
   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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "aco_interface.h"
  25 #include "aco_ir.h"
  26 #include "vulkan/radv_shader.h"
  27 #include "vulkan/radv_shader_args.h"
  28 #include "c11/threads.h"
  29 #include "util/debug.h"
  30
  31 #include <iostream>
  32 #include <sstream>
  33
  34 namespace aco {
  35 uint64_t debug_flags = 0;
  36
  37 static const struct debug_control aco_debug_options[] = {
  38    {"validateir", DEBUG_VALIDATE},
  39    {"validatera", DEBUG_VALIDATE_RA},
  40    {"perfwarn", DEBUG_PERFWARN},
  41    {NULL, 0}
  42 };
  43
  44 static once_flag init_once_flag = ONCE_FLAG_INIT;
  45
  46 static void init()
  47 {
  48    debug_flags = parse_debug_string(getenv("ACO_DEBUG"), aco_debug_options);
  49
  50    #ifndef NDEBUG
  51    /* enable some flags by default on debug builds */
  52    debug_flags |= aco::DEBUG_VALIDATE;
  53    #endif
  54 }
  55 }
  56
  57 static radv_compiler_statistic_info statistic_infos[] = {
  58    [aco::statistic_hash] = {"Hash", "CRC32 hash of code and constant data"},
  59    [aco::statistic_instructions] = {"Instructions", "Instruction count"},
  60    [aco::statistic_copies] = {"Copies", "Copy instructions created for pseudo-instructions"},
  61    [aco::statistic_branches] = {"Branches", "Branch instructions"},
  62    [aco::statistic_cycles] = {"Busy Cycles", "Estimate of busy cycles"},
  63    [aco::statistic_vmem_clauses] = {"VMEM Clause", "Number of VMEM clauses (includes 1-sized clauses)"},
  64    [aco::statistic_smem_clauses] = {"SMEM Clause", "Number of SMEM clauses (includes 1-sized clauses)"},
  65    [aco::statistic_vmem_score] = {"VMEM Score", "Average VMEM def-use distances"},
  66    [aco::statistic_smem_score] = {"SMEM Score", "Average SMEM def-use distances"},
  67    [aco::statistic_sgpr_presched] = {"Pre-Sched SGPRs", "SGPR usage before scheduling"},
  68    [aco::statistic_vgpr_presched] = {"Pre-Sched VGPRs", "VGPR usage before scheduling"},
  69 };
  70
  71 void aco_compile_shader(unsigned shader_count,
  72                         struct nir_shader *const *shaders,
  73                         struct radv_shader_binary **binary,
  74                         struct radv_shader_args *args)
  75 {
  76    call_once(&aco::init_once_flag, aco::init);
  77
  78    ac_shader_config config = {0};
  79    std::unique_ptr<aco::Program> program{new aco::Program};
  80
  81    program->collect_statistics = args->options->record_stats;
  82    if (program->collect_statistics)
  83       memset(program->statistics, 0, sizeof(program->statistics));
  84
  85    /* Instruction Selection */
  86    if (args->is_gs_copy_shader)
  87       aco::select_gs_copy_shader(program.get(), shaders[0], &config, args);
  88    else
  89       aco::select_program(program.get(), shader_count, shaders, &config, args);
  90    if (args->options->dump_preoptir) {
  91       std::cerr << "After Instruction Selection:\n";
  92       aco_print_program(program.get(), stderr);
  93    }
  94
  95    /* Phi lowering */
  96    aco::lower_phis(program.get());
  97    aco::dominator_tree(program.get());
  98    aco::validate(program.get(), stderr);
  99
 100    /* Optimization */
 101    aco::value_numbering(program.get());
 102    aco::optimize(program.get());
 103
 104    /* cleanup and exec mask handling */
 105    aco::setup_reduce_temp(program.get());
 106    aco::insert_exec_mask(program.get());
 107    aco::validate(program.get(), stderr);
 108
 109    /* spilling and scheduling */
 110    aco::live live_vars = aco::live_var_analysis(program.get(), args->options);
 111    aco::spill(program.get(), live_vars, args->options);
 112    if (program->collect_statistics)
 113       aco::collect_presched_stats(program.get());
 114    aco::schedule_program(program.get(), live_vars);
 115    aco::validate(program.get(), stderr);
 116
 117    std::string llvm_ir;
 118    if (args->options->record_ir) {
 119       char *data = NULL;
 120       size_t size = 0;
 121       FILE *f = open_memstream(&data, &size);
 122       if (f) {
 123          aco_print_program(program.get(), f);
 124          fputc(0, f);
 125          fclose(f);
 126       }
 127
 128       llvm_ir = std::string(data, data + size);
 129       free(data);
 130    }
 131
 132    /* Register Allocation */
 133    aco::register_allocation(program.get(), live_vars.live_out);
 134    if (args->options->dump_shader) {
 135       std::cerr << "After RA:\n";
 136       aco_print_program(program.get(), stderr);
 137    }
 138
 139    if (aco::validate_ra(program.get(), args->options, stderr)) {
 140       std::cerr << "Program after RA validation failure:\n";
 141       aco_print_program(program.get(), stderr);
 142       abort();
 143    }
 144
 145    aco::validate(program.get(), stderr);
 146
 147    /* Lower to HW Instructions */
 148    aco::ssa_elimination(program.get());
 149    aco::lower_to_hw_instr(program.get());
 150
 151    /* Insert Waitcnt */
 152    aco::insert_wait_states(program.get());
 153    aco::insert_NOPs(program.get());
 154
 155    if (program->collect_statistics)
 156       aco::collect_preasm_stats(program.get());
 157
 158    /* Assembly */
 159    std::vector<uint32_t> code;
 160    unsigned exec_size = aco::emit_program(program.get(), code);
 161
 162    if (program->collect_statistics)
 163       aco::collect_postasm_stats(program.get(), code);
 164
 165    bool get_disasm = args->options->dump_shader || args->options->record_ir;
 166
 167    size_t size = llvm_ir.size();
 168
 169    std::string disasm;
 170    if (get_disasm) {
 171       std::ostringstream stream;
 172       aco::print_asm(program.get(), code, exec_size / 4u, stream);
 173       stream << '\0';
 174       disasm = stream.str();
 175       size += disasm.size();
 176    }
 177
 178    size_t stats_size = 0;
 179    if (program->collect_statistics)
 180       stats_size = sizeof(radv_compiler_statistics) + aco::num_statistics * sizeof(uint32_t);
 181    size += stats_size;
 182
 183    size += code.size() * sizeof(uint32_t) + sizeof(radv_shader_binary_legacy);
 184    /* We need to calloc to prevent unintialized data because this will be used
 185     * directly for the disk cache. Uninitialized data can appear because of
 186     * padding in the struct or because legacy_binary->data can be at an offset
 187     * from the start less than sizeof(radv_shader_binary_legacy). */
 188    radv_shader_binary_legacy* legacy_binary = (radv_shader_binary_legacy*) calloc(size, 1);
 189
 190    legacy_binary->base.type = RADV_BINARY_TYPE_LEGACY;
 191    legacy_binary->base.stage = shaders[shader_count-1]->info.stage;
 192    legacy_binary->base.is_gs_copy_shader = args->is_gs_copy_shader;
 193    legacy_binary->base.total_size = size;
 194
 195    if (program->collect_statistics) {
 196       radv_compiler_statistics *statistics = (radv_compiler_statistics *)legacy_binary->data;
 197       statistics->count = aco::num_statistics;
 198       statistics->infos = statistic_infos;
 199       memcpy(statistics->values, program->statistics, aco::num_statistics * sizeof(uint32_t));
 200    }
 201    legacy_binary->stats_size = stats_size;
 202
 203    memcpy(legacy_binary->data + legacy_binary->stats_size, code.data(), code.size() * sizeof(uint32_t));
 204    legacy_binary->exec_size = exec_size;
 205    legacy_binary->code_size = code.size() * sizeof(uint32_t);
 206
 207    legacy_binary->config = config;
 208    legacy_binary->disasm_size = 0;
 209    legacy_binary->ir_size = llvm_ir.size();
 210
 211    llvm_ir.copy((char*) legacy_binary->data + legacy_binary->stats_size + legacy_binary->code_size, llvm_ir.size());
 212
 213    if (get_disasm) {
 214       disasm.copy((char*) legacy_binary->data + legacy_binary->stats_size + legacy_binary->code_size + llvm_ir.size(), disasm.size());
 215       legacy_binary->disasm_size = disasm.size();
 216    }
 217
 218    *binary = (radv_shader_binary*) legacy_binary;
 219 }