nsz Git - cparser/blob - driver/firm_opt.c

   1 /**
   2  *
   3  * @file firm_opt.c -- Firm-generating back end optimizations.
   4  *
   5  * (C) 2005-2010  Michael Beck   beck@ipd.info.uni-karlsruhe.de
   6  *
   7  * $Id$
   8  */
   9
  10 #include <config.h>
  11
  12 #include <stdbool.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <stdbool.h>
  16 #include <assert.h>
  17 #include <libfirm/firm.h>
  18
  19 #include "firm_opt.h"
  20 #include "firm_codegen.h"
  21 #include "firm_cmdline.h"
  22 #include "firm_timing.h"
  23 #include "ast2firm.h"
  24
  25 #if defined(_DEBUG) || defined(FIRM_DEBUG)
  26 #define DBG(x)  dbg_printf x
  27 #else
  28 #define DBG(x) ((void)0)
  29 #endif /* _DEBUG || FIRM_DEBUG */
  30
  31 static ir_timer_t *t_vcg_dump;
  32 static ir_timer_t *t_verify;
  33 static ir_timer_t *t_all_opt;
  34 static bool do_irg_opt(ir_graph *irg, const char *name);
  35
  36 /** dump all the graphs depending on cond */
  37
  38 static void dump_all(const char *suffix)
  39 {
  40         if (firm_dump.ir_graph) {
  41                 timer_push(t_vcg_dump);
  42                 if (firm_dump.no_blocks)
  43                         dump_all_ir_graphs(dump_ir_graph, suffix);
  44                 else if (firm_dump.extbb)
  45                         dump_all_ir_graphs(dump_ir_extblock_graph, suffix);
  46                 else
  47                         dump_all_ir_graphs(dump_ir_block_graph, suffix);
  48                 timer_pop(t_vcg_dump);
  49         }
  50 }
  51
  52 /* set by the backend parameters */
  53 static const ir_settings_arch_dep_t *ad_param              = NULL;
  54 static create_intrinsic_fkt         *arch_create_intrinsic = NULL;
  55 static void                         *create_intrinsic_ctx  = NULL;
  56 static const ir_settings_if_conv_t  *if_conv_info          = NULL;
  57
  58 /* entities of runtime functions */
  59 ir_entity_ptr rts_entities[rts_max];
  60
  61 /**
  62  * factory for setting architecture dependent parameters
  63  */
  64 static const ir_settings_arch_dep_t *arch_factory(void)
  65 {
  66         static const ir_settings_arch_dep_t param = {
  67                 1,   /* also use subs */
  68                 4,   /* maximum shifts */
  69                 31,   /* maximum shift amount */
  70                 NULL, /* use default evaluator */
  71
  72                 1, /* allow Mulhs */
  73                 1, /* allow Mulus */
  74                 32  /* Mulh allowed up to 32 bit */
  75         };
  76
  77         return ad_param ? ad_param : &param;
  78 }
  79
  80 /**
  81  * Map runtime functions.
  82  */
  83 static void rts_map(void)
  84 {
  85         static const struct {
  86                 ir_entity_ptr *ent; /**< address of the rts entity */
  87                 i_mapper_func func; /**< mapper function. */
  88         } mapper[] = {
  89                 /* integer */
  90                 { &rts_entities[rts_abs],     i_mapper_abs },
  91                 { &rts_entities[rts_labs],    i_mapper_abs },
  92                 { &rts_entities[rts_llabs],   i_mapper_abs },
  93                 { &rts_entities[rts_imaxabs], i_mapper_abs },
  94
  95                 /* double -> double */
  96                 { &rts_entities[rts_fabs],    i_mapper_abs },
  97                 { &rts_entities[rts_sqrt],    i_mapper_sqrt },
  98                 { &rts_entities[rts_cbrt],    i_mapper_cbrt },
  99                 { &rts_entities[rts_pow],     i_mapper_pow },
 100                 { &rts_entities[rts_exp],     i_mapper_exp },
 101                 { &rts_entities[rts_exp2],    i_mapper_exp },
 102                 { &rts_entities[rts_exp10],   i_mapper_exp },
 103                 { &rts_entities[rts_log],     i_mapper_log },
 104                 { &rts_entities[rts_log2],    i_mapper_log2 },
 105                 { &rts_entities[rts_log10],   i_mapper_log10 },
 106                 { &rts_entities[rts_sin],     i_mapper_sin },
 107                 { &rts_entities[rts_cos],     i_mapper_cos },
 108                 { &rts_entities[rts_tan],     i_mapper_tan },
 109                 { &rts_entities[rts_asin],    i_mapper_asin },
 110                 { &rts_entities[rts_acos],    i_mapper_acos },
 111                 { &rts_entities[rts_atan],    i_mapper_atan },
 112                 { &rts_entities[rts_sinh],    i_mapper_sinh },
 113                 { &rts_entities[rts_cosh],    i_mapper_cosh },
 114                 { &rts_entities[rts_tanh],    i_mapper_tanh },
 115
 116                 /* float -> float */
 117                 { &rts_entities[rts_fabsf],   i_mapper_abs },
 118                 { &rts_entities[rts_sqrtf],   i_mapper_sqrt },
 119                 { &rts_entities[rts_cbrtf],   i_mapper_cbrt },
 120                 { &rts_entities[rts_powf],    i_mapper_pow },
 121                 { &rts_entities[rts_expf],    i_mapper_exp },
 122                 { &rts_entities[rts_exp2f],   i_mapper_exp },
 123                 { &rts_entities[rts_exp10f],  i_mapper_exp },
 124                 { &rts_entities[rts_logf],    i_mapper_log },
 125                 { &rts_entities[rts_log2f],   i_mapper_log2 },
 126                 { &rts_entities[rts_log10f],  i_mapper_log10 },
 127                 { &rts_entities[rts_sinf],    i_mapper_sin },
 128                 { &rts_entities[rts_cosf],    i_mapper_cos },
 129                 { &rts_entities[rts_tanf],    i_mapper_tan },
 130                 { &rts_entities[rts_asinf],   i_mapper_asin },
 131                 { &rts_entities[rts_acosf],   i_mapper_acos },
 132                 { &rts_entities[rts_atanf],   i_mapper_atan },
 133                 { &rts_entities[rts_sinhf],   i_mapper_sinh },
 134                 { &rts_entities[rts_coshf],   i_mapper_cosh },
 135                 { &rts_entities[rts_tanhf],   i_mapper_tanh },
 136
 137                 /* long double -> long double */
 138                 { &rts_entities[rts_fabsl],   i_mapper_abs },
 139                 { &rts_entities[rts_sqrtl],   i_mapper_sqrt },
 140                 { &rts_entities[rts_cbrtl],   i_mapper_cbrt },
 141                 { &rts_entities[rts_powl],    i_mapper_pow },
 142                 { &rts_entities[rts_expl],    i_mapper_exp },
 143                 { &rts_entities[rts_exp2l],   i_mapper_exp },
 144                 { &rts_entities[rts_exp10l],  i_mapper_exp },
 145                 { &rts_entities[rts_logl],    i_mapper_log },
 146                 { &rts_entities[rts_log2l],   i_mapper_log2 },
 147                 { &rts_entities[rts_log10l],  i_mapper_log10 },
 148                 { &rts_entities[rts_sinl],    i_mapper_sin },
 149                 { &rts_entities[rts_cosl],    i_mapper_cos },
 150                 { &rts_entities[rts_tanl],    i_mapper_tan },
 151                 { &rts_entities[rts_asinl],   i_mapper_asin },
 152                 { &rts_entities[rts_acosl],   i_mapper_acos },
 153                 { &rts_entities[rts_atanl],   i_mapper_atan },
 154                 { &rts_entities[rts_sinhl],   i_mapper_sinh },
 155                 { &rts_entities[rts_coshl],   i_mapper_cosh },
 156                 { &rts_entities[rts_tanhl],   i_mapper_tanh },
 157
 158                 /* string */
 159                 { &rts_entities[rts_strcmp],  i_mapper_strcmp },
 160                 { &rts_entities[rts_strncmp], i_mapper_strncmp },
 161                 { &rts_entities[rts_strcpy],  i_mapper_strcpy },
 162                 { &rts_entities[rts_strlen],  i_mapper_strlen },
 163                 { &rts_entities[rts_memcpy],  i_mapper_memcpy },
 164                 { &rts_entities[rts_mempcpy], i_mapper_mempcpy },
 165                 { &rts_entities[rts_memmove], i_mapper_memmove },
 166                 { &rts_entities[rts_memset],  i_mapper_memset },
 167                 { &rts_entities[rts_memcmp],  i_mapper_memcmp }
 168         };
 169         i_record rec[sizeof(mapper)/sizeof(mapper[0])];
 170         unsigned i, n_map;
 171
 172         for (i = n_map = 0; i < sizeof(mapper)/sizeof(mapper[0]); ++i) {
 173                 if (*mapper[i].ent != NULL) {
 174                         rec[n_map].i_call.kind     = INTRINSIC_CALL;
 175                         rec[n_map].i_call.i_ent    = *mapper[i].ent;
 176                         rec[n_map].i_call.i_mapper = mapper[i].func;
 177                         rec[n_map].i_call.ctx      = NULL;
 178                         rec[n_map].i_call.link     = NULL;
 179                         ++n_map;
 180                 }
 181         }
 182
 183         if (n_map > 0)
 184                 lower_intrinsics(rec, n_map, /* part_block_used=*/0);
 185 }
 186
 187 static int *irg_dump_no;
 188
 189 static void dump_graph_count(ir_graph *const irg, const char *const suffix)
 190 {
 191         char name[64];
 192         snprintf(name, sizeof(name), "-%02d_%s", irg_dump_no[get_irg_idx(irg)]++,
 193                  suffix);
 194
 195         timer_push(t_vcg_dump);
 196         if (firm_dump.no_blocks)
 197                 dump_ir_graph(irg, name);
 198         else if (firm_dump.extbb)
 199                 dump_ir_extblock_graph(irg, name);
 200         else
 201                 dump_ir_block_graph(irg, name);
 202         timer_pop(t_vcg_dump);
 203 }
 204
 205 static int firm_const_exists;
 206
 207 static void do_optimize_funccalls(void)
 208 {
 209         optimize_funccalls(firm_const_exists, NULL);
 210 }
 211
 212 static void do_gcse(ir_graph *irg)
 213 {
 214         set_opt_global_cse(1);
 215         optimize_graph_df(irg);
 216         place_code(irg);
 217         set_opt_global_cse(0);
 218 }
 219
 220 static void do_lower_highlevel(ir_graph *irg)
 221 {
 222         lower_highlevel_graph(irg, firm_opt.lower_bitfields);
 223 }
 224
 225 static void do_if_conv(ir_graph *irg)
 226 {
 227         opt_if_conv(irg, if_conv_info);
 228 }
 229
 230 static void do_stred(ir_graph *irg)
 231 {
 232         opt_osr(irg, osr_flag_default | osr_flag_keep_reg_pressure | osr_flag_ignore_x86_shift);
 233 }
 234
 235 static void after_inline_opt(ir_graph *irg)
 236 {
 237         do_irg_opt(irg, "scalar-replace");
 238         do_irg_opt(irg, "local");
 239         do_irg_opt(irg, "control-flow");
 240         do_irg_opt(irg, "combo");
 241 }
 242
 243 static void do_inline(void)
 244 {
 245         inline_functions(firm_opt.inline_maxsize, firm_opt.inline_threshold,
 246                          after_inline_opt);
 247 }
 248
 249 static void do_cloning(void)
 250 {
 251         proc_cloning((float) firm_opt.clone_threshold);
 252 }
 253
 254 static void do_lower_switch(ir_graph *irg)
 255 {
 256         lower_switch(irg, firm_opt.spare_size);
 257 }
 258
 259 static void do_lower_mux(ir_graph *irg)
 260 {
 261         lower_mux(irg, NULL);
 262 }
 263
 264 static void do_lower_dw_ops(void)
 265 {
 266         lwrdw_param_t init = {
 267                 1,
 268                 1,
 269                 get_atomic_mode(ATOMIC_TYPE_LONGLONG),
 270                 get_atomic_mode(ATOMIC_TYPE_ULONGLONG),
 271                 get_atomic_mode(ATOMIC_TYPE_INT),
 272                 get_atomic_mode(ATOMIC_TYPE_UINT),
 273                 def_create_intrinsic_fkt,
 274                 NULL
 275         };
 276
 277         if (arch_create_intrinsic) {
 278                 init.create_intrinsic = arch_create_intrinsic;
 279                 init.ctx              = create_intrinsic_ctx;
 280         }
 281         lower_dw_ops(&init);
 282 }
 283
 284 static void do_vrp(ir_graph *irg)
 285 {
 286         set_vrp_data(irg);
 287 }
 288
 289 typedef enum opt_target {
 290         OPT_TARGET_IRG, /**< optimization function works on a single graph */
 291         OPT_TARGET_IRP  /**< optimization function works on the complete program */
 292 } opt_target_t;
 293
 294 typedef enum opt_flags {
 295         OPT_FLAG_NONE         = 0,
 296         OPT_FLAG_ENABLED      = 1 << 0, /**< enable the optimization */
 297         OPT_FLAG_NO_DUMP      = 1 << 1, /**< don't dump after transformation */
 298         OPT_FLAG_NO_VERIFY    = 1 << 2, /**< don't verify after transformation */
 299         OPT_FLAG_HIDE_OPTIONS = 1 << 3, /**< do not automatically process
 300                                              -foptions for this transformation */
 301         OPT_FLAG_ESSENTIAL    = 1 << 4, /**< output won't work without this pass
 302                                              so we need it even with -O0 */
 303 } opt_flags_t;
 304
 305 typedef void (*transform_irg_func)(ir_graph *irg);
 306 typedef void (*transform_irp_func)(void);
 307
 308 typedef struct {
 309         opt_target_t  target;
 310         const char   *name;
 311         union {
 312                 transform_irg_func transform_irg;
 313                 transform_irp_func transform_irp;
 314         } u;
 315         const char   *description;
 316         opt_flags_t   flags;
 317 } opt_config_t;
 318
 319 static opt_config_t opts[] = {
 320 #define IRG(a, b, c, d) { OPT_TARGET_IRG, a, .u.transform_irg = (transform_irg_func)b, c, d }
 321 #define IRP(a, b, c, d) { OPT_TARGET_IRP, a, .u.transform_irp = b,                     c, d }
 322         IRG("bool",              opt_bool,                 "bool simplification",                                   OPT_FLAG_NONE),
 323         IRG("combo",             combo,                    "combined CCE, UCE and GVN",                             OPT_FLAG_NONE),
 324         IRG("confirm",           construct_confirms,       "confirm optimisation",                                  OPT_FLAG_HIDE_OPTIONS),
 325         IRG("control-flow",      optimize_cf,              "optimization of control-flow",                          OPT_FLAG_HIDE_OPTIONS),
 326         IRG("dead",              dead_node_elimination,    "dead node elimination",                                 OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 327         IRG("deconv",            conv_opt,                 "conv node elimination",                                 OPT_FLAG_NONE),
 328         IRG("fp-vrp",            fixpoint_vrp,             "fixpoint value range propagation",                      OPT_FLAG_NONE),
 329         IRG("frame",             opt_frame_irg,            "remove unused frame entities",                          OPT_FLAG_NONE),
 330         IRG("gcse",              do_gcse,                  "global common subexpression elimination",               OPT_FLAG_NONE),
 331         IRG("gvn-pre",           do_gvn_pre,               "global value numbering partial redundancy elimination", OPT_FLAG_NONE),
 332         IRG("if-conversion",     do_if_conv,               "if-conversion",                                         OPT_FLAG_NONE),
 333         IRG("invert-loops",      do_loop_inversion,        "loop inversion",                                        OPT_FLAG_NONE),
 334         IRG("ivopts",            do_stred,                 "induction variable strength reduction",                 OPT_FLAG_NONE),
 335         IRG("local",             optimize_graph_df,        "local graph optimizations",                             OPT_FLAG_HIDE_OPTIONS),
 336         IRG("lower",             do_lower_highlevel,       "lowering",                                              OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
 337         IRG("lower-mux",         do_lower_mux,             "mux lowering",                                          OPT_FLAG_NONE),
 338         IRG("lower-switch",      do_lower_switch,          "switch lowering",                                       OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
 339         IRG("one-return",        normalize_one_return,     "normalisation to 1 return",                             OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 340         IRG("opt-load-store",    optimize_load_store,      "load store optimization",                               OPT_FLAG_NONE),
 341         IRG("opt-tail-rec",      opt_tail_rec_irg,         "tail-recursion eliminiation",                           OPT_FLAG_NONE),
 342         IRG("parallelize-mem",   opt_parallelize_mem,      "parallelize memory",                                    OPT_FLAG_NONE),
 343         IRG("place",             place_code,               "code placement",                                        OPT_FLAG_NONE),
 344         IRG("reassociation",     optimize_reassociation,   "reassociation",                                         OPT_FLAG_NONE),
 345         IRG("remove-confirms",   remove_confirms,          "confirm removal",                                       OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 346         IRG("remove-phi-cycles", remove_phi_cycles,        "removal of phi cycles",                                 OPT_FLAG_HIDE_OPTIONS),
 347         IRG("scalar-replace",    scalar_replacement_opt,   "scalar replacement",                                    OPT_FLAG_NONE),
 348         IRG("shape-blocks",      shape_blocks,             "block shaping",                                         OPT_FLAG_NONE),
 349         IRG("thread-jumps",      opt_jumpthreading,        "path-sensitive jumpthreading",                          OPT_FLAG_NONE),
 350         IRG("unroll-loops",      do_loop_unrolling,        "loop unrolling",                                        OPT_FLAG_NONE),
 351         IRG("vrp",               do_vrp,                   "value range propagation",                               OPT_FLAG_NONE),
 352         IRP("inline",            do_inline,                "inlining",                                              OPT_FLAG_NONE),
 353         IRP("lower-const",       lower_const_code,         "lowering of constant code",                             OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY | OPT_FLAG_ESSENTIAL),
 354         IRP("lower-dw",          do_lower_dw_ops,          "lowering of doubleword operations",                     OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
 355         IRP("opt-func-call",     do_optimize_funccalls,    "function call optimization",                            OPT_FLAG_NONE),
 356         IRP("opt-proc-clone",    do_cloning,               "procedure cloning",                                     OPT_FLAG_NONE),
 357         IRP("remove-unused",     garbage_collect_entities, "removal of unused functions/variables",                 OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 358         IRP("rts",               rts_map,                  "optimization of known library functions",               OPT_FLAG_HIDE_OPTIONS),
 359 #undef IRP
 360 #undef IRG
 361 };
 362 static const int n_opts = sizeof(opts) / sizeof(opts[0]);
 363 ir_timer_t *timers[sizeof(opts)/sizeof(opts[0])];
 364
 365 static opt_config_t *get_opt(const char *name)
 366 {
 367         int i;
 368         for (i = 0; i < n_opts; ++i) {
 369                 opt_config_t *config = &opts[i];
 370                 if (strcmp(config->name, name) == 0)
 371                         return config;
 372         }
 373
 374         return NULL;
 375 }
 376
 377 static void set_opt_enabled(const char *name, bool enabled)
 378 {
 379         opt_config_t *config = get_opt(name);
 380         config->flags = (config->flags & ~OPT_FLAG_ENABLED)
 381                 | (enabled ? OPT_FLAG_ENABLED : 0);
 382 }
 383
 384 static bool get_opt_enabled(const char *name)
 385 {
 386         opt_config_t *config = get_opt(name);
 387         return (config->flags & OPT_FLAG_ENABLED) != 0;
 388 }
 389
 390 /**
 391  * perform an optimisation on a single graph
 392  *
 393  * @return  true if something changed, false otherwise
 394  */
 395 static bool do_irg_opt(ir_graph *irg, const char *name)
 396 {
 397         ir_graph     *old_irg;
 398         opt_config_t *config = get_opt(name);
 399         size_t        n      = config - opts;
 400         assert(config != NULL);
 401         assert(config->target == OPT_TARGET_IRG);
 402         if (! (config->flags & OPT_FLAG_ENABLED))
 403                 return false;
 404
 405         old_irg          = current_ir_graph;
 406         current_ir_graph = irg;
 407
 408         timer_push(timers[n]);
 409         config->u.transform_irg(irg);
 410         timer_pop(timers[n]);
 411
 412         if (firm_dump.all_phases && firm_dump.ir_graph) {
 413                 dump_graph_count(irg, name);
 414         }
 415
 416         if (firm_opt.check_all) {
 417                 timer_push(t_verify);
 418                 irg_verify(irg, VRFY_ENFORCE_SSA);
 419                 timer_pop(t_verify);
 420         }
 421
 422         current_ir_graph = old_irg;
 423         return true;
 424 }
 425
 426 static void do_irp_opt(const char *name)
 427 {
 428         opt_config_t *config = get_opt(name);
 429         size_t        n      = config - opts;
 430         assert(config->target == OPT_TARGET_IRP);
 431         if (! (config->flags & OPT_FLAG_ENABLED))
 432                 return;
 433
 434         timer_push(timers[n]);
 435         config->u.transform_irp();
 436         timer_pop(timers[n]);
 437
 438         if (firm_dump.ir_graph && firm_dump.all_phases) {
 439                 int i;
 440                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 441                         ir_graph *irg = get_irp_irg(i);
 442                         dump_graph_count(irg, name);
 443                 }
 444         }
 445
 446         if (firm_opt.check_all) {
 447                 int i;
 448                 timer_push(t_verify);
 449                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 450                         irg_verify(get_irp_irg(i), VRFY_ENFORCE_SSA);
 451                 }
 452                 timer_pop(t_verify);
 453         }
 454 }
 455
 456 /**
 457  * Enable transformations which should be always safe (and cheap) to perform
 458  */
 459 static void enable_safe_defaults(void)
 460 {
 461         set_opt_enabled("remove-unused", true);
 462         set_opt_enabled("opt-tail-rec", true);
 463         set_opt_enabled("opt-func-call", true);
 464         set_opt_enabled("reassociation", true);
 465         set_opt_enabled("control-flow", true);
 466         set_opt_enabled("local", true);
 467         set_opt_enabled("lower-const", true);
 468         set_opt_enabled("scalar-replace", true);
 469         set_opt_enabled("place", true);
 470         set_opt_enabled("confirm", true);
 471         set_opt_enabled("opt-load-store", true);
 472         set_opt_enabled("lower", true);
 473         set_opt_enabled("deconv", true);
 474         set_opt_enabled("remove-confirms", true);
 475         set_opt_enabled("ivopts", true);
 476         set_opt_enabled("dead", true);
 477         set_opt_enabled("lower-switch", true);
 478         set_opt_enabled("remove-phi-cycles", true);
 479         set_opt_enabled("frame", true);
 480         set_opt_enabled("combo", true);
 481         set_opt_enabled("invert-loops", true);
 482 }
 483
 484 /**
 485  * run all the Firm optimizations
 486  *
 487  * @param input_filename     the name of the (main) source file
 488  */
 489 static void do_firm_optimizations(const char *input_filename)
 490 {
 491         int      i;
 492         unsigned aa_opt;
 493
 494         set_opt_alias_analysis(firm_opt.alias_analysis);
 495
 496         aa_opt = aa_opt_no_opt;
 497         if (firm_opt.strict_alias)
 498                 aa_opt |= aa_opt_type_based | aa_opt_byte_type_may_alias;
 499         if (firm_opt.no_alias)
 500                 aa_opt = aa_opt_no_alias;
 501
 502         set_irp_memory_disambiguator_options(aa_opt);
 503
 504         /* parameter passing code should set them directly sometime... */
 505         set_opt_enabled("rts", !firm_opt.freestanding);
 506         set_opt_enabled("gcse", firm_opt.gcse);
 507         set_opt_enabled("place", !firm_opt.gcse);
 508         set_opt_enabled("confirm", firm_opt.confirm);
 509         set_opt_enabled("remove-confirms", firm_opt.confirm);
 510
 511         /* osr supersedes remove_phi_cycles */
 512         if (get_opt_enabled("ivopts"))
 513                 set_opt_enabled("remove-phi-cycles", false);
 514
 515         timer_start(t_all_opt);
 516
 517         do_irp_opt("rts");
 518
 519         /* first step: kill dead code */
 520         for (i = 0; i < get_irp_n_irgs(); i++) {
 521                 ir_graph *irg = get_irp_irg(i);
 522                 do_irg_opt(irg, "combo");
 523                 do_irg_opt(irg, "local");
 524                 do_irg_opt(irg, "control-flow");
 525         }
 526
 527         do_irp_opt("remove-unused");
 528         for (i = 0; i < get_irp_n_irgs(); ++i) {
 529                 ir_graph *irg = get_irp_irg(i);
 530                 do_irg_opt(irg, "opt-tail-rec");
 531         }
 532         do_irp_opt("opt-func-call");
 533         do_irp_opt("lower-const");
 534
 535         for (i = 0; i < get_irp_n_irgs(); i++) {
 536                 ir_graph *irg = get_irp_irg(i);
 537
 538                 do_irg_opt(irg, "scalar-replace");
 539                 do_irg_opt(irg, "invert-loops");
 540                 do_irg_opt(irg, "unroll-loops");
 541                 do_irg_opt(irg, "local");
 542                 do_irg_opt(irg, "reassociation");
 543                 do_irg_opt(irg, "local");
 544                 do_irg_opt(irg, "gcse");
 545
 546                 if (firm_opt.confirm) {
 547                         /* Confirm construction currently can only handle blocks with only
 548                            one control flow predecessor. Calling optimize_cf here removes
 549                            Bad predecessors and help the optimization of switch constructs.
 550                          */
 551                         do_irg_opt(irg, "control-flow");
 552                         do_irg_opt(irg, "confirm");
 553                         do_irg_opt(irg, "vrp");
 554                         do_irg_opt(irg, "local");
 555                 }
 556
 557                 do_irg_opt(irg, "control-flow");
 558                 do_irg_opt(irg, "opt-load-store");
 559                 do_irg_opt(irg, "fp-vrp");
 560                 do_irg_opt(irg, "lower");
 561                 do_irg_opt(irg, "deconv");
 562                 do_irg_opt(irg, "thread-jumps");
 563                 do_irg_opt(irg, "remove-confirms");
 564                 do_irg_opt(irg, "gvn-pre");
 565                 do_irg_opt(irg, "place");
 566                 do_irg_opt(irg, "control-flow");
 567
 568                 if (do_irg_opt(irg, "if-conversion")) {
 569                         do_irg_opt(irg, "local");
 570                         do_irg_opt(irg, "control-flow");
 571                 }
 572                 /* this doesn't make too much sense but tests the mux destruction... */
 573                 do_irg_opt(irg, "lower-mux");
 574
 575                 do_irg_opt(irg, "bool");
 576                 do_irg_opt(irg, "shape-blocks");
 577                 do_irg_opt(irg, "lower-switch");
 578                 do_irg_opt(irg, "ivopts");
 579                 do_irg_opt(irg, "local");
 580                 do_irg_opt(irg, "dead");
 581                 do_irg_opt(irg, "frame");
 582         }
 583
 584         do_irp_opt("inline");
 585         do_irp_opt("opt-proc-clone");
 586
 587         for (i = 0; i < get_irp_n_irgs(); i++) {
 588                 ir_graph *irg = get_irp_irg(i);
 589                 do_irg_opt(irg, "local");
 590                 do_irg_opt(irg, "control-flow");
 591                 do_irg_opt(irg, "thread-jumps");
 592                 do_irg_opt(irg, "local");
 593                 do_irg_opt(irg, "control-flow");
 594
 595                 if( do_irg_opt(irg, "vrp") ) { // if vrp is enabled
 596                         do_irg_opt(irg, "local");
 597                         do_irg_opt(irg, "vrp");
 598                         do_irg_opt(irg, "local");
 599                         do_irg_opt(irg, "vrp");
 600                 }
 601         }
 602
 603         if (firm_dump.ir_graph) {
 604                 /* recompute backedges for nicer dumps */
 605                 for (i = 0; i < get_irp_n_irgs(); i++)
 606                         construct_cf_backedges(get_irp_irg(i));
 607         }
 608
 609         dump_all("-opt");
 610
 611         if (firm_dump.statistic & STAT_AFTER_OPT)
 612                 stat_dump_snapshot(input_filename, "opt");
 613
 614         timer_stop(t_all_opt);
 615 }
 616
 617 /**
 618  * do Firm lowering
 619  *
 620  * @param input_filename  the name of the (main) source file
 621  */
 622 static void do_firm_lowering(const char *input_filename)
 623 {
 624         int i;
 625
 626         do_irp_opt("lower-dw");
 627
 628         if (firm_dump.statistic & STAT_AFTER_LOWER)
 629                 stat_dump_snapshot(input_filename, "low");
 630
 631         dump_all("-low");
 632
 633         if (firm_opt.enabled) {
 634                 timer_start(t_all_opt);
 635
 636                 /* run reassociation first on all graphs BEFORE the architecture
 637                    dependent optimizations are enabled */
 638                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 639                         ir_graph *irg = get_irp_irg(i);
 640                         do_irg_opt(irg, "reassociation");
 641                 }
 642
 643                 /* enable architecture dependent optimizations */
 644                 arch_dep_set_opts((arch_dep_opts_t)
 645                                 ((firm_opt.muls ? arch_dep_mul_to_shift : arch_dep_none) |
 646                                  (firm_opt.divs ? arch_dep_div_by_const : arch_dep_none) |
 647                                  (firm_opt.mods ? arch_dep_mod_by_const : arch_dep_none) ));
 648
 649                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 650                         ir_graph *irg = get_irp_irg(i);
 651
 652                         do_irg_opt(irg, "local");
 653                         do_irg_opt(irg, "gcse");
 654                         do_irg_opt(irg, "opt-load-store");
 655                         do_irg_opt(irg, "local");
 656                         do_irg_opt(irg, "control-flow");
 657
 658                         if (do_irg_opt(irg, "vrp")) {
 659                                 do_irg_opt(irg, "local");
 660                                 do_irg_opt(irg, "control-flow");
 661                                 do_irg_opt(irg, "vrp");
 662                                 do_irg_opt(irg, "local");
 663                                 do_irg_opt(irg, "control-flow");
 664                         }
 665
 666                         if (do_irg_opt(irg, "if-conversion")) {
 667                                 do_irg_opt(irg, "local");
 668                                 do_irg_opt(irg, "control-flow");
 669                         }
 670
 671                         do_irg_opt(irg, "parallelize-mem");
 672                 }
 673                 timer_stop(t_all_opt);
 674
 675                 do_irp_opt("remove-unused");
 676
 677                 dump_all("-low-opt");
 678         }
 679
 680         if (firm_opt.cc_opt)
 681                 mark_private_methods();
 682
 683         /* set the phase to low */
 684         for (i = get_irp_n_irgs() - 1; i >= 0; --i)
 685                 set_irg_phase_low(get_irp_irg(i));
 686
 687         /* all graphs are lowered, set the irp phase to low */
 688         set_irp_phase_state(phase_low);
 689
 690         if (firm_dump.statistic & STAT_FINAL) {
 691                 stat_dump_snapshot(input_filename, "final");
 692         }
 693 }
 694
 695 /**
 696  * Initialize for the Firm-generating back end.
 697  */
 698 void gen_firm_init(void)
 699 {
 700         unsigned pattern = 0;
 701         int      i;
 702
 703         for (i = 0; i < n_opts; ++i) {
 704                 timers[i] = ir_timer_new();
 705                 timer_register(timers[i], opts[i].description);
 706         }
 707         t_verify = ir_timer_new();
 708         timer_register(t_verify, "Firm: verify pass");
 709         t_vcg_dump = ir_timer_new();
 710         timer_register(t_vcg_dump, "Firm: vcg dumping");
 711         t_all_opt = ir_timer_new();
 712         timer_register(t_all_opt, "Firm: all optimizations");
 713
 714         if (firm_dump.stat_pattern)
 715                 pattern |= FIRMSTAT_PATTERN_ENABLED;
 716
 717         if (firm_dump.stat_dag)
 718                 pattern |= FIRMSTAT_COUNT_DAG;
 719
 720         ir_init(NULL);
 721         firm_init_stat(firm_dump.statistic == STAT_NONE ?
 722                         0 : FIRMSTAT_ENABLED | FIRMSTAT_COUNT_STRONG_OP
 723                         | FIRMSTAT_COUNT_CONSTS | pattern);
 724
 725         if (firm_be_opt.selection == BE_FIRM_BE) {
 726                 const backend_params *be_params = be_get_backend_param();
 727
 728                 if (be_params->do_dw_lowering)
 729                         set_opt_enabled("lower-dw", true);
 730
 731                 arch_create_intrinsic   = be_params->arch_create_intrinsic_fkt;
 732                 create_intrinsic_ctx    = be_params->create_intrinsic_ctx;
 733
 734                 ad_param                = be_params->dep_param;
 735                 if_conv_info            = be_params->if_conv_info;
 736         }
 737
 738         edges_init_dbg(firm_opt.vrfy_edges);
 739
 740         /* Sel node cannot produce NULL pointers */
 741         set_opt_sel_based_null_check_elim(1);
 742
 743         /* dynamic dispatch works currently only if whole world scenarios */
 744         set_opt_dyn_meth_dispatch(0);
 745
 746         arch_dep_init(arch_factory);
 747
 748         /* do not run architecture dependent optimizations in building phase */
 749         arch_dep_set_opts(arch_dep_none);
 750
 751         do_node_verification((firm_verification_t) firm_opt.vrfy);
 752         if (firm_dump.filter)
 753                 only_dump_method_with_name(new_id_from_str(firm_dump.filter));
 754
 755         if (firm_opt.enabled) {
 756                 set_optimize(1);
 757                 set_opt_constant_folding(firm_opt.const_folding);
 758                 set_opt_algebraic_simplification(firm_opt.const_folding);
 759                 set_opt_cse(firm_opt.cse);
 760                 set_opt_global_cse(0);
 761                 set_opt_unreachable_code(1);
 762                 set_opt_control_flow(firm_opt.control_flow);
 763                 set_opt_control_flow_weak_simplification(1);
 764                 set_opt_control_flow_strong_simplification(1);
 765         } else {
 766                 set_optimize(0);
 767         }
 768
 769         /* do not dump entity ld names */
 770         dump_ld_names(0);
 771 }
 772
 773 /**
 774  * Called, after the Firm generation is completed,
 775  * do all optimizations and backend call here.
 776  *
 777  * @param out                a file handle for the output, may be NULL
 778  * @param input_filename     the name of the (main) source file
 779  * @param c_mode             non-zero if "C" was compiled
 780  * @param new_firm_const_exists  non-zero, if the const attribute was used on functions
 781  */
 782 void gen_firm_finish(FILE *out, const char *input_filename, int c_mode,
 783                      int new_firm_const_exists)
 784 {
 785         int i;
 786
 787 #if 0
 788         if (firm_opt.enable_statev) {
 789                 char buf[1024];
 790                 snprintf(buf, sizeof(buf), "%s.ev", input_filename);
 791                 ir_stat_ev_begin(input_filename, firm_opt.statev_filter);
 792                 ir_stat_ev_compilation_unit(input_filename);
 793         }
 794 #endif
 795
 796         firm_const_exists = new_firm_const_exists;
 797
 798         /* the general for dumping option must be set, or the others will not work*/
 799         firm_dump.ir_graph
 800                 = (a_byte) (firm_dump.ir_graph | firm_dump.all_phases | firm_dump.extbb);
 801
 802         dump_keepalive_edges(1);
 803         dump_consts_local(1);
 804         dump_dominator_information(1);
 805         dump_loop_information(0);
 806
 807         if (!firm_dump.edge_labels)
 808                 turn_off_edge_labels();
 809
 810         /* FIXME: cloning might ADD new graphs. */
 811         irg_dump_no = calloc(get_irp_last_idx(), sizeof(*irg_dump_no));
 812
 813         if (firm_dump.all_types) {
 814                 dump_all_types("");
 815                 if (! c_mode) {
 816                         dump_class_hierarchy(0, "");
 817                         dump_class_hierarchy(1, "-with-entities");
 818                 }
 819         }
 820
 821         /* finalize all graphs */
 822         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 823                 ir_graph *irg = get_irp_irg(i);
 824                 irg_finalize_cons(irg);
 825         }
 826         dump_all("");
 827
 828         timer_push(t_verify);
 829         tr_vrfy();
 830         timer_pop(t_verify);
 831
 832         /* all graphs are finalized, set the irp phase to high */
 833         set_irp_phase_state(phase_high);
 834
 835         /* BEWARE: kill unreachable code before doing compound lowering */
 836         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 837                 ir_graph *irg = get_irp_irg(i);
 838                 do_irg_opt(irg, "control-flow");
 839         }
 840
 841         /* lower all compound call return values */
 842         lower_compound_params();
 843
 844         /* lower copyb nodes */
 845         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 846                 ir_graph *irg = get_irp_irg(i);
 847                 lower_CopyB(irg, 128, 4);
 848         }
 849
 850         if (firm_dump.statistic & STAT_BEFORE_OPT) {
 851                 stat_dump_snapshot(input_filename, "noopt");
 852         }
 853
 854         if (firm_opt.enabled)
 855                 do_firm_optimizations(input_filename);
 856
 857         if (firm_opt.lower)
 858                 do_firm_lowering(input_filename);
 859
 860         /* set the phase to low */
 861         for (i = get_irp_n_irgs() - 1; i >= 0; --i)
 862                 set_irg_phase_low(get_irp_irg(i));
 863
 864         if (firm_dump.statistic & STAT_FINAL_IR)
 865                 stat_dump_snapshot(input_filename, "final-ir");
 866
 867         /* run the code generator */
 868         if (firm_be_opt.selection != BE_NONE)
 869                 do_codegen(out, input_filename);
 870
 871         if (firm_dump.statistic & STAT_FINAL)
 872                 stat_dump_snapshot(input_filename, "final");
 873 }
 874
 875 void disable_all_opts(void)
 876 {
 877         for (int i = 0; i < n_opts; ++i) {
 878                 opt_config_t *config = &opts[i];
 879                 if (config->flags & OPT_FLAG_ESSENTIAL) {
 880                         config->flags |= OPT_FLAG_ENABLED;
 881                 } else {
 882                         config->flags &= ~OPT_FLAG_ENABLED;
 883                 }
 884         }
 885 }
 886
 887 int firm_opt_option(const char *opt)
 888 {
 889         bool enable = true;
 890         if (strncmp(opt, "no-", 3) == 0) {
 891                 enable = false;
 892                 opt = opt + 3;
 893         }
 894
 895         opt_config_t *config = get_opt(opt);
 896         if (config == NULL || (config->flags & OPT_FLAG_HIDE_OPTIONS))
 897                 return 0;
 898
 899         config->flags &= ~OPT_FLAG_ENABLED;
 900         config->flags |= enable ? OPT_FLAG_ENABLED : 0;
 901         return 1;
 902 }
 903
 904 void firm_opt_option_help(void)
 905 {
 906         int i;
 907
 908         for (i = 0; i < n_opts; ++i) {
 909                 char buf[1024];
 910                 char buf2[1024];
 911
 912                 const opt_config_t *config = &opts[i];
 913                 if (config->flags & OPT_FLAG_HIDE_OPTIONS)
 914                         continue;
 915
 916                 snprintf(buf2, sizeof(buf2), "firm: enable %s", config->description);
 917                 print_option_help(config->name, buf2);
 918                 snprintf(buf, sizeof(buf), "no-%s", config->name);
 919                 snprintf(buf2, sizeof(buf2), "firm: disable %s", config->description);
 920                 print_option_help(buf, buf2);
 921         }
 922 }
 923
 924 /**
 925  * Do very early initializations
 926  */
 927 void firm_early_init(void)
 928 {
 929         /* arg: need this here for command line options */
 930         be_opt_register();
 931
 932         enable_safe_defaults();
 933 }