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_timing.h"
  21 #include "ast2firm.h"
  22 #include "adt/strutil.h"
  23
  24 /* optimization settings */
  25 struct a_firm_opt {
  26         bool     const_folding;   /**< enable constant folding */
  27         bool     cse;             /**< enable common-subexpression elimination */
  28         bool     confirm;         /**< enable Confirm optimization */
  29         bool     muls;            /**< enable architecture dependent mul optimization */
  30         bool     divs;            /**< enable architecture dependent div optimization */
  31         bool     mods;            /**< enable architecture dependent mod optimization */
  32         bool     alias_analysis;  /**< enable Alias Analysis */
  33         bool     strict_alias;    /**< enable strict Alias Analysis (using type based AA) */
  34         bool     no_alias;        /**< no aliasing possible. */
  35         bool     verify;          /**< Firm verifier setting */
  36         bool     check_all;       /**< enable checking all Firm phases */
  37         int      clone_threshold; /**< The threshold value for procedure cloning. */
  38         unsigned inline_maxsize;  /**< Maximum function size for inlining. */
  39         unsigned inline_threshold;/**< Inlining benefice threshold. */
  40         bool     verify_edges;    /**< verify edges */
  41 };
  42
  43 /** statistic options */
  44 typedef enum a_firmstat_selection_tag {
  45         STAT_NONE        = 0x00000000,
  46         STAT_BEFORE_OPT  = 0x00000001,
  47         STAT_AFTER_OPT   = 0x00000002,
  48         STAT_AFTER_LOWER = 0x00000004,
  49         STAT_FINAL_IR    = 0x00000008,
  50         STAT_FINAL       = 0x00000010,
  51 } a_firmstat_selection;
  52
  53 /* dumping options */
  54 struct a_firm_dump {
  55         bool debug_print;   /**< enable debug print */
  56         bool all_types;     /**< dump the All_types graph */
  57         bool no_blocks;     /**< dump non-blocked graph */
  58         bool extbb;         /**< dumps extended basic blocks */
  59         bool ir_graph;      /**< dump all graphs */
  60         bool all_phases;    /**< dump the IR graph after all phases */
  61         bool statistic;     /**< Firm statistic setting */
  62         bool stat_pattern;  /**< enable Firm statistic pattern */
  63         bool stat_dag;      /**< enable Firm DAG statistic */
  64 };
  65
  66 struct a_firm_be_opt {
  67         bool selection;
  68         bool node_stat;
  69 };
  70
  71 /* optimization settings */
  72 static struct a_firm_opt firm_opt = {
  73         .const_folding    =  true,
  74         .cse              =  true,
  75         .confirm          =  true,
  76         .muls             =  true,
  77         .divs             =  true,
  78         .mods             =  true,
  79         .alias_analysis   =  true,
  80         .strict_alias     =  false,
  81         .no_alias         =  false,
  82         .verify           =  FIRM_VERIFICATION_ON,
  83         .check_all        =  true,
  84         .clone_threshold  =  DEFAULT_CLONE_THRESHOLD,
  85         .inline_maxsize   =  750,
  86         .inline_threshold =  0,
  87         .verify_edges     =  false,
  88 };
  89
  90 /* dumping options */
  91 static struct a_firm_dump firm_dump = {
  92         .debug_print  = false,
  93         .all_types    = false,
  94         .no_blocks    = false,
  95         .extbb        = false,
  96         .ir_graph     = false,
  97         .all_phases   = false,
  98         .statistic    = STAT_NONE,
  99         .stat_pattern = 0,
 100         .stat_dag     = 0,
 101 };
 102
 103 #define X(a)  a, sizeof(a)-1
 104
 105 /** Parameter description structure */
 106 static const struct params {
 107   const char *option;      /**< name of the option */
 108   size_t     opt_len;      /**< length of the option string */
 109   bool       *flag;        /**< address of variable to set/reset */
 110   bool       set;          /**< iff true, variable will be set, else reset */
 111   const char *description; /**< description of this option */
 112 } firm_options[] = {
 113   /* firm optimization options */
 114   { X("no-opt"),                 NULL,                       0, "disable all FIRM optimizations" },
 115   { X("cse"),                    &firm_opt.cse,              1, "enable common subexpression elimination" },
 116   { X("no-cse"),                 &firm_opt.cse,              0, "disable common subexpression elimination" },
 117   { X("const-fold"),             &firm_opt.const_folding,    1, "enable constant folding" },
 118   { X("no-const-fold"),          &firm_opt.const_folding,    0, "disable constant folding" },
 119   { X("inline-max-size=<size>"), NULL,                       0, "set maximum size for function inlining" },
 120   { X("inline-threshold=<size>"),NULL,                       0, "set benefice threshold for function inlining" },
 121   { X("confirm"),                &firm_opt.confirm,          1, "enable Confirm optimization" },
 122   { X("no-confirm"),             &firm_opt.confirm,          0, "disable Confirm optimization" },
 123   { X("opt-mul"),                &firm_opt.muls,             0, "enable multiplication optimization" },
 124   { X("no-opt-mul"),             &firm_opt.muls,             0, "disable multiplication optimization" },
 125   { X("opt-div"),                &firm_opt.divs,             0, "enable division optimization" },
 126   { X("no-opt-div"),             &firm_opt.divs,             0, "disable division optimization" },
 127   { X("opt-mod"),                &firm_opt.mods,             0, "enable remainder optimization" },
 128   { X("no-opt-mod"),             &firm_opt.mods,             0, "disable remainder optimization" },
 129   { X("opt-alias"),              &firm_opt.alias_analysis,   1, "enable alias analysis" },
 130   { X("no-opt-alias"),           &firm_opt.alias_analysis,   0, "disable alias analysis" },
 131   { X("alias"),                  &firm_opt.no_alias,         0, "aliasing occurs" },
 132   { X("no-alias"),               &firm_opt.no_alias,         1, "no aliasing occurs" },
 133   { X("strict-aliasing"),        &firm_opt.strict_alias,     1, "strict alias rules" },
 134   { X("no-strict-aliasing"),     &firm_opt.strict_alias,     0, "strict alias rules" },
 135   { X("clone-threshold=<value>"),NULL,                       0, "set clone threshold to <value>" },
 136
 137   /* other firm regarding options */
 138   { X("verify-off"),             &firm_opt.verify,           FIRM_VERIFICATION_OFF,    "disable node verification" },
 139   { X("verify-on"),              &firm_opt.verify,           FIRM_VERIFICATION_ON,     "enable node verification" },
 140   { X("verify-report"),          &firm_opt.verify,           FIRM_VERIFICATION_REPORT, "node verification, report only" },
 141   { X("check-all"),              &firm_opt.check_all,        1, "enable checking all Firm phases" },
 142   { X("no-check-all"),           &firm_opt.check_all,        0, "disable checking all Firm phases" },
 143   { X("verify-edges-on"),        &firm_opt.verify_edges,     1, "enable out edge verification" },
 144   { X("verify-edges-off"),       &firm_opt.verify_edges,     0, "disable out edge verification" },
 145
 146   /* dumping */
 147   { X("dump-ir"),                &firm_dump.ir_graph,        1, "dump IR graph" },
 148   { X("dump-all-types"),         &firm_dump.all_types,       1, "dump graph of all types" },
 149   { X("dump-no-blocks"),         &firm_dump.no_blocks,       1, "dump non-blocked graph" },
 150   { X("dump-extbb"),             &firm_dump.extbb,           1, "dump extended basic blocks" },
 151   { X("dump-all-phases"),        &firm_dump.all_phases,      1, "dump graphs for all optimization phases" },
 152   { X("dump-filter=<string>"),   NULL,                       0, "set dumper filter" },
 153
 154   /* misc */
 155   { X("stat-before-opt"),        &firm_dump.statistic,       STAT_BEFORE_OPT,  "Firm statistic output before optimizations" },
 156   { X("stat-after-opt"),         &firm_dump.statistic,       STAT_AFTER_OPT,   "Firm statistic output after optimizations" },
 157   { X("stat-after-lower"),       &firm_dump.statistic,       STAT_AFTER_LOWER, "Firm statistic output after lowering" },
 158   { X("stat-final-ir"),          &firm_dump.statistic,       STAT_FINAL_IR,    "Firm statistic after final optimization" },
 159   { X("stat-final"),             &firm_dump.statistic,       STAT_FINAL,       "Firm statistic after code generation" },
 160   { X("stat-pattern"),           &firm_dump.stat_pattern,    1, "Firm statistic calculates most used pattern" },
 161   { X("stat-dag"),               &firm_dump.stat_dag,        1, "Firm calculates DAG statistics" },
 162 };
 163
 164 #undef X
 165
 166 static ir_timer_t *t_vcg_dump;
 167 static ir_timer_t *t_verify;
 168 static ir_timer_t *t_all_opt;
 169 static bool do_irg_opt(ir_graph *irg, const char *name);
 170
 171 /** dump all the graphs depending on cond */
 172
 173 static void dump_all(const char *suffix)
 174 {
 175         if (!firm_dump.ir_graph)
 176                 return;
 177
 178         timer_push(t_vcg_dump);
 179         dump_all_ir_graphs(suffix);
 180         timer_pop(t_vcg_dump);
 181 }
 182
 183 /* entities of runtime functions */
 184 ir_entity_ptr rts_entities[rts_max];
 185
 186 /**
 187  * Map runtime functions.
 188  */
 189 static void rts_map(void)
 190 {
 191         static const struct {
 192                 ir_entity_ptr *ent; /**< address of the rts entity */
 193                 i_mapper_func func; /**< mapper function. */
 194         } mapper[] = {
 195                 /* integer */
 196                 { &rts_entities[rts_abs],     i_mapper_abs },
 197                 { &rts_entities[rts_labs],    i_mapper_abs },
 198                 { &rts_entities[rts_llabs],   i_mapper_abs },
 199                 { &rts_entities[rts_imaxabs], i_mapper_abs },
 200
 201                 /* double -> double */
 202                 { &rts_entities[rts_fabs],    i_mapper_abs },
 203                 { &rts_entities[rts_sqrt],    i_mapper_sqrt },
 204                 { &rts_entities[rts_cbrt],    i_mapper_cbrt },
 205                 { &rts_entities[rts_pow],     i_mapper_pow },
 206                 { &rts_entities[rts_exp],     i_mapper_exp },
 207                 { &rts_entities[rts_exp2],    i_mapper_exp },
 208                 { &rts_entities[rts_exp10],   i_mapper_exp },
 209                 { &rts_entities[rts_log],     i_mapper_log },
 210                 { &rts_entities[rts_log2],    i_mapper_log2 },
 211                 { &rts_entities[rts_log10],   i_mapper_log10 },
 212                 { &rts_entities[rts_sin],     i_mapper_sin },
 213                 { &rts_entities[rts_cos],     i_mapper_cos },
 214                 { &rts_entities[rts_tan],     i_mapper_tan },
 215                 { &rts_entities[rts_asin],    i_mapper_asin },
 216                 { &rts_entities[rts_acos],    i_mapper_acos },
 217                 { &rts_entities[rts_atan],    i_mapper_atan },
 218                 { &rts_entities[rts_sinh],    i_mapper_sinh },
 219                 { &rts_entities[rts_cosh],    i_mapper_cosh },
 220                 { &rts_entities[rts_tanh],    i_mapper_tanh },
 221
 222                 /* float -> float */
 223                 { &rts_entities[rts_fabsf],   i_mapper_abs },
 224                 { &rts_entities[rts_sqrtf],   i_mapper_sqrt },
 225                 { &rts_entities[rts_cbrtf],   i_mapper_cbrt },
 226                 { &rts_entities[rts_powf],    i_mapper_pow },
 227                 { &rts_entities[rts_expf],    i_mapper_exp },
 228                 { &rts_entities[rts_exp2f],   i_mapper_exp },
 229                 { &rts_entities[rts_exp10f],  i_mapper_exp },
 230                 { &rts_entities[rts_logf],    i_mapper_log },
 231                 { &rts_entities[rts_log2f],   i_mapper_log2 },
 232                 { &rts_entities[rts_log10f],  i_mapper_log10 },
 233                 { &rts_entities[rts_sinf],    i_mapper_sin },
 234                 { &rts_entities[rts_cosf],    i_mapper_cos },
 235                 { &rts_entities[rts_tanf],    i_mapper_tan },
 236                 { &rts_entities[rts_asinf],   i_mapper_asin },
 237                 { &rts_entities[rts_acosf],   i_mapper_acos },
 238                 { &rts_entities[rts_atanf],   i_mapper_atan },
 239                 { &rts_entities[rts_sinhf],   i_mapper_sinh },
 240                 { &rts_entities[rts_coshf],   i_mapper_cosh },
 241                 { &rts_entities[rts_tanhf],   i_mapper_tanh },
 242
 243                 /* long double -> long double */
 244                 { &rts_entities[rts_fabsl],   i_mapper_abs },
 245                 { &rts_entities[rts_sqrtl],   i_mapper_sqrt },
 246                 { &rts_entities[rts_cbrtl],   i_mapper_cbrt },
 247                 { &rts_entities[rts_powl],    i_mapper_pow },
 248                 { &rts_entities[rts_expl],    i_mapper_exp },
 249                 { &rts_entities[rts_exp2l],   i_mapper_exp },
 250                 { &rts_entities[rts_exp10l],  i_mapper_exp },
 251                 { &rts_entities[rts_logl],    i_mapper_log },
 252                 { &rts_entities[rts_log2l],   i_mapper_log2 },
 253                 { &rts_entities[rts_log10l],  i_mapper_log10 },
 254                 { &rts_entities[rts_sinl],    i_mapper_sin },
 255                 { &rts_entities[rts_cosl],    i_mapper_cos },
 256                 { &rts_entities[rts_tanl],    i_mapper_tan },
 257                 { &rts_entities[rts_asinl],   i_mapper_asin },
 258                 { &rts_entities[rts_acosl],   i_mapper_acos },
 259                 { &rts_entities[rts_atanl],   i_mapper_atan },
 260                 { &rts_entities[rts_sinhl],   i_mapper_sinh },
 261                 { &rts_entities[rts_coshl],   i_mapper_cosh },
 262                 { &rts_entities[rts_tanhl],   i_mapper_tanh },
 263
 264                 /* string */
 265                 { &rts_entities[rts_strcmp],  i_mapper_strcmp },
 266                 { &rts_entities[rts_strncmp], i_mapper_strncmp },
 267                 { &rts_entities[rts_strcpy],  i_mapper_strcpy },
 268                 { &rts_entities[rts_strlen],  i_mapper_strlen },
 269                 { &rts_entities[rts_memcpy],  i_mapper_memcpy },
 270                 { &rts_entities[rts_mempcpy], i_mapper_mempcpy },
 271                 { &rts_entities[rts_memmove], i_mapper_memmove },
 272                 { &rts_entities[rts_memset],  i_mapper_memset },
 273                 { &rts_entities[rts_memcmp],  i_mapper_memcmp }
 274         };
 275         i_record rec[sizeof(mapper)/sizeof(mapper[0])];
 276         unsigned i, n_map;
 277
 278         for (i = n_map = 0; i < sizeof(mapper)/sizeof(mapper[0]); ++i) {
 279                 if (*mapper[i].ent != NULL) {
 280                         rec[n_map].i_call.kind     = INTRINSIC_CALL;
 281                         rec[n_map].i_call.i_ent    = *mapper[i].ent;
 282                         rec[n_map].i_call.i_mapper = mapper[i].func;
 283                         rec[n_map].i_call.ctx      = NULL;
 284                         rec[n_map].i_call.link     = NULL;
 285                         ++n_map;
 286                 }
 287         }
 288
 289         if (n_map > 0)
 290                 lower_intrinsics(rec, n_map, /* part_block_used=*/0);
 291 }
 292
 293 static int *irg_dump_no;
 294
 295 static void do_stred(ir_graph *irg)
 296 {
 297         opt_osr(irg, osr_flag_default | osr_flag_keep_reg_pressure | osr_flag_ignore_x86_shift);
 298 }
 299
 300 static void after_inline_opt(ir_graph *irg)
 301 {
 302         do_irg_opt(irg, "scalar-replace");
 303         do_irg_opt(irg, "local");
 304         do_irg_opt(irg, "control-flow");
 305         do_irg_opt(irg, "combo");
 306 }
 307
 308 static void do_inline(void)
 309 {
 310         inline_functions(firm_opt.inline_maxsize, firm_opt.inline_threshold,
 311                          after_inline_opt);
 312 }
 313
 314 static void do_cloning(void)
 315 {
 316         proc_cloning((float) firm_opt.clone_threshold);
 317 }
 318
 319 static void do_lower_mux(ir_graph *irg)
 320 {
 321         lower_mux(irg, NULL);
 322 }
 323
 324 static void do_gcse(ir_graph *irg)
 325 {
 326         set_opt_global_cse(1);
 327         optimize_graph_df(irg);
 328         set_opt_global_cse(0);
 329 }
 330
 331 static void lower_blockcopy(ir_graph *irg)
 332 {
 333         lower_CopyB(irg, 128, 4);
 334 }
 335
 336 typedef enum opt_target {
 337         OPT_TARGET_IRG, /**< optimization function works on a single graph */
 338         OPT_TARGET_IRP  /**< optimization function works on the complete program */
 339 } opt_target_t;
 340
 341 typedef enum opt_flags {
 342         OPT_FLAG_NONE         = 0,
 343         OPT_FLAG_ENABLED      = 1 << 0, /**< enable the optimization */
 344         OPT_FLAG_NO_DUMP      = 1 << 1, /**< don't dump after transformation */
 345         OPT_FLAG_NO_VERIFY    = 1 << 2, /**< don't verify after transformation */
 346         OPT_FLAG_HIDE_OPTIONS = 1 << 3, /**< do not automatically process
 347                                              -foptions for this transformation */
 348         OPT_FLAG_ESSENTIAL    = 1 << 4, /**< output won't work without this pass
 349                                              so we need it even with -O0 */
 350 } opt_flags_t;
 351
 352 typedef void (*transform_irg_func)(ir_graph *irg);
 353 typedef void (*transform_irp_func)(void);
 354
 355 typedef struct {
 356         opt_target_t  target;
 357         const char   *name;
 358         union {
 359                 transform_irg_func transform_irg;
 360                 transform_irp_func transform_irp;
 361         } u;
 362         const char   *description;
 363         opt_flags_t   flags;
 364         ir_timer_t   *timer;
 365 } opt_config_t;
 366
 367 static opt_config_t opts[] = {
 368 #define IRG(a, b, c, d) { OPT_TARGET_IRG, a, .u.transform_irg = (transform_irg_func)b, c, d }
 369 #define IRP(a, b, c, d) { OPT_TARGET_IRP, a, .u.transform_irp = b,                     c, d }
 370         IRG("bool",              opt_bool,                 "bool simplification",                                   OPT_FLAG_NONE),
 371         IRG("combo",             combo,                    "combined CCE, UCE and GVN",                             OPT_FLAG_NONE),
 372         IRG("confirm",           construct_confirms,       "confirm optimization",                                  OPT_FLAG_HIDE_OPTIONS),
 373         IRG("control-flow",      optimize_cf,              "optimization of control-flow",                          OPT_FLAG_HIDE_OPTIONS),
 374         IRG("dead",              dead_node_elimination,    "dead node elimination",                                 OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 375         IRG("deconv",            conv_opt,                 "conv node elimination",                                 OPT_FLAG_NONE),
 376         IRG("fp-vrp",            fixpoint_vrp,             "fixpoint value range propagation",                      OPT_FLAG_NONE),
 377         IRG("frame",             opt_frame_irg,            "remove unused frame entities",                          OPT_FLAG_NONE),
 378         IRG("gvn-pre",           do_gvn_pre,               "global value numbering partial redundancy elimination", OPT_FLAG_NONE),
 379         IRG("if-conversion",     opt_if_conv,              "if-conversion",                                         OPT_FLAG_NONE),
 380         IRG("invert-loops",      do_loop_inversion,        "loop inversion",                                        OPT_FLAG_NONE),
 381         IRG("ivopts",            do_stred,                 "induction variable strength reduction",                 OPT_FLAG_NONE),
 382         IRG("local",             optimize_graph_df,        "local graph optimizations",                             OPT_FLAG_HIDE_OPTIONS),
 383         IRG("lower",             lower_highlevel_graph,    "lowering",                                              OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
 384         IRG("lower-mux",         do_lower_mux,             "mux lowering",                                          OPT_FLAG_NONE),
 385         IRG("opt-load-store",    optimize_load_store,      "load store optimization",                               OPT_FLAG_NONE),
 386         IRG("opt-tail-rec",      opt_tail_rec_irg,         "tail-recursion eliminiation",                           OPT_FLAG_NONE),
 387         IRG("parallelize-mem",   opt_parallelize_mem,      "parallelize memory",                                    OPT_FLAG_NONE),
 388         IRG("gcse",              do_gcse,                  "global common subexpression eliminiation",              OPT_FLAG_NONE),
 389         IRG("place",             place_code,               "code placement",                                        OPT_FLAG_NONE),
 390         IRG("reassociation",     optimize_reassociation,   "reassociation",                                         OPT_FLAG_NONE),
 391         IRG("remove-confirms",   remove_confirms,          "confirm removal",                                       OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 392         IRG("remove-phi-cycles", remove_phi_cycles,        "removal of phi cycles",                                 OPT_FLAG_HIDE_OPTIONS),
 393         IRG("scalar-replace",    scalar_replacement_opt,   "scalar replacement",                                    OPT_FLAG_NONE),
 394         IRG("shape-blocks",      shape_blocks,             "block shaping",                                         OPT_FLAG_NONE),
 395         IRG("thread-jumps",      opt_jumpthreading,        "path-sensitive jumpthreading",                          OPT_FLAG_NONE),
 396         IRG("unroll-loops",      do_loop_unrolling,        "loop unrolling",                                        OPT_FLAG_NONE),
 397         IRG("vrp",               set_vrp_data,             "value range propagation",                               OPT_FLAG_NONE),
 398         IRP("inline",            do_inline,                "inlining",                                              OPT_FLAG_NONE),
 399         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),
 400         IRG("lower-blockcopy",   lower_blockcopy,          "replace small block copies with load/store sequences",  OPT_FLAG_NO_DUMP),
 401         IRP("target-lowering",   be_lower_for_target,      "lowering necessary for target architecture",            OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_ESSENTIAL),
 402         IRP("opt-func-call",     optimize_funccalls,       "function call optimization",                            OPT_FLAG_NONE),
 403         IRP("opt-proc-clone",    do_cloning,               "procedure cloning",                                     OPT_FLAG_NONE),
 404         IRP("remove-unused",     garbage_collect_entities, "removal of unused functions/variables",                 OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY),
 405         IRP("rts",               rts_map,                  "optimization of known library functions",               OPT_FLAG_NONE),
 406         IRP("opt-cc",            mark_private_methods,     "calling conventions optimization",                      OPT_FLAG_NONE),
 407 #undef IRP
 408 #undef IRG
 409 };
 410 static const int n_opts = sizeof(opts) / sizeof(opts[0]);
 411
 412 static opt_config_t *get_opt(const char *name)
 413 {
 414         int i;
 415         for (i = 0; i < n_opts; ++i) {
 416                 opt_config_t *config = &opts[i];
 417                 if (strcmp(config->name, name) == 0)
 418                         return config;
 419         }
 420
 421         return NULL;
 422 }
 423
 424 static void set_opt_enabled(const char *name, bool enabled)
 425 {
 426         opt_config_t *config = get_opt(name);
 427         config->flags = (config->flags & ~OPT_FLAG_ENABLED)
 428                 | (enabled ? OPT_FLAG_ENABLED : 0);
 429 }
 430
 431 static bool get_opt_enabled(const char *name)
 432 {
 433         opt_config_t *config = get_opt(name);
 434         return (config->flags & OPT_FLAG_ENABLED) != 0;
 435 }
 436
 437 /**
 438  * perform an optimization on a single graph
 439  *
 440  * @return  true if something changed, false otherwise
 441  */
 442 static bool do_irg_opt(ir_graph *irg, const char *name)
 443 {
 444         opt_config_t *const config = get_opt(name);
 445         assert(config != NULL);
 446         assert(config->target == OPT_TARGET_IRG);
 447         if (! (config->flags & OPT_FLAG_ENABLED))
 448                 return false;
 449
 450         ir_graph *const old_irg = current_ir_graph;
 451         current_ir_graph = irg;
 452
 453         timer_push(config->timer);
 454         config->u.transform_irg(irg);
 455         timer_pop(config->timer);
 456
 457         if (firm_dump.all_phases && firm_dump.ir_graph) {
 458                 dump_ir_graph(irg, name);
 459         }
 460
 461         if (firm_opt.check_all) {
 462                 timer_push(t_verify);
 463                 irg_verify(irg, VERIFY_ENFORCE_SSA);
 464                 timer_pop(t_verify);
 465         }
 466
 467         current_ir_graph = old_irg;
 468         return true;
 469 }
 470
 471 static void do_irp_opt(const char *name)
 472 {
 473         opt_config_t *const config = get_opt(name);
 474         assert(config->target == OPT_TARGET_IRP);
 475         if (! (config->flags & OPT_FLAG_ENABLED))
 476                 return;
 477
 478         timer_push(config->timer);
 479         config->u.transform_irp();
 480         timer_pop(config->timer);
 481
 482         if (firm_dump.ir_graph && firm_dump.all_phases) {
 483                 int i;
 484                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 485                         ir_graph *irg = get_irp_irg(i);
 486                         dump_ir_graph(irg, name);
 487                 }
 488         }
 489
 490         if (firm_opt.check_all) {
 491                 int i;
 492                 timer_push(t_verify);
 493                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 494                         irg_verify(get_irp_irg(i), VERIFY_ENFORCE_SSA);
 495                 }
 496                 timer_pop(t_verify);
 497         }
 498 }
 499
 500 /**
 501  * Enable transformations which should be always safe (and cheap) to perform
 502  */
 503 static void enable_safe_defaults(void)
 504 {
 505         set_opt_enabled("remove-unused", true);
 506         set_opt_enabled("opt-tail-rec", true);
 507         set_opt_enabled("opt-func-call", true);
 508         set_opt_enabled("reassociation", true);
 509         set_opt_enabled("control-flow", true);
 510         set_opt_enabled("local", true);
 511         set_opt_enabled("lower-const", true);
 512         set_opt_enabled("scalar-replace", true);
 513         set_opt_enabled("place", true);
 514         set_opt_enabled("gcse", true);
 515         set_opt_enabled("confirm", true);
 516         set_opt_enabled("opt-load-store", true);
 517         set_opt_enabled("lower", true);
 518         set_opt_enabled("lower-blockcopy", true);
 519         set_opt_enabled("deconv", true);
 520         set_opt_enabled("remove-confirms", true);
 521         set_opt_enabled("ivopts", true);
 522         set_opt_enabled("dead", true);
 523         set_opt_enabled("remove-phi-cycles", true);
 524         set_opt_enabled("frame", true);
 525         set_opt_enabled("combo", true);
 526         set_opt_enabled("invert-loops", true);
 527         set_opt_enabled("target-lowering", true);
 528         set_opt_enabled("rts", true);
 529         set_opt_enabled("parallelize-mem", true);
 530         set_opt_enabled("opt-cc", true);
 531 }
 532
 533 /**
 534  * run all the Firm optimizations
 535  *
 536  * @param input_filename     the name of the (main) source file
 537  */
 538 static void do_firm_optimizations(const char *input_filename)
 539 {
 540         size_t   i;
 541         unsigned aa_opt;
 542
 543         set_opt_alias_analysis(firm_opt.alias_analysis);
 544
 545         aa_opt = aa_opt_no_opt;
 546         if (firm_opt.strict_alias)
 547                 aa_opt |= aa_opt_type_based | aa_opt_byte_type_may_alias;
 548         if (firm_opt.no_alias)
 549                 aa_opt = aa_opt_no_alias;
 550
 551         set_irp_memory_disambiguator_options(aa_opt);
 552
 553         /* parameter passing code should set them directly sometime... */
 554         set_opt_enabled("confirm", firm_opt.confirm);
 555         set_opt_enabled("remove-confirms", firm_opt.confirm);
 556
 557         /* osr supersedes remove_phi_cycles */
 558         if (get_opt_enabled("ivopts"))
 559                 set_opt_enabled("remove-phi-cycles", false);
 560
 561         timer_start(t_all_opt);
 562
 563         do_irp_opt("rts");
 564
 565         /* first step: kill dead code */
 566         for (i = 0; i < get_irp_n_irgs(); i++) {
 567                 ir_graph *irg = get_irp_irg(i);
 568                 do_irg_opt(irg, "combo");
 569                 do_irg_opt(irg, "local");
 570                 do_irg_opt(irg, "control-flow");
 571         }
 572
 573         do_irp_opt("remove-unused");
 574         for (i = 0; i < get_irp_n_irgs(); ++i) {
 575                 ir_graph *irg = get_irp_irg(i);
 576                 do_irg_opt(irg, "opt-tail-rec");
 577         }
 578         do_irp_opt("opt-func-call");
 579         do_irp_opt("lower-const");
 580
 581         for (i = 0; i < get_irp_n_irgs(); i++) {
 582                 ir_graph *irg = get_irp_irg(i);
 583
 584                 do_irg_opt(irg, "scalar-replace");
 585                 do_irg_opt(irg, "invert-loops");
 586                 do_irg_opt(irg, "unroll-loops");
 587                 do_irg_opt(irg, "local");
 588                 do_irg_opt(irg, "reassociation");
 589                 do_irg_opt(irg, "local");
 590                 do_irg_opt(irg, "gcse");
 591                 do_irg_opt(irg, "place");
 592
 593                 if (firm_opt.confirm) {
 594                         /* Confirm construction currently can only handle blocks with only
 595                            one control flow predecessor. Calling optimize_cf here removes
 596                            Bad predecessors and help the optimization of switch constructs.
 597                          */
 598                         do_irg_opt(irg, "control-flow");
 599                         do_irg_opt(irg, "confirm");
 600                         do_irg_opt(irg, "vrp");
 601                         do_irg_opt(irg, "local");
 602                 }
 603
 604                 do_irg_opt(irg, "control-flow");
 605                 do_irg_opt(irg, "opt-load-store");
 606                 do_irg_opt(irg, "fp-vrp");
 607                 do_irg_opt(irg, "lower");
 608                 do_irg_opt(irg, "deconv");
 609                 do_irg_opt(irg, "thread-jumps");
 610                 do_irg_opt(irg, "remove-confirms");
 611                 do_irg_opt(irg, "gvn-pre");
 612                 do_irg_opt(irg, "gcse");
 613                 do_irg_opt(irg, "place");
 614                 do_irg_opt(irg, "control-flow");
 615
 616                 if (do_irg_opt(irg, "if-conversion")) {
 617                         do_irg_opt(irg, "local");
 618                         do_irg_opt(irg, "control-flow");
 619                 }
 620                 /* this doesn't make too much sense but tests the mux destruction... */
 621                 do_irg_opt(irg, "lower-mux");
 622
 623                 do_irg_opt(irg, "bool");
 624                 do_irg_opt(irg, "shape-blocks");
 625                 do_irg_opt(irg, "ivopts");
 626                 do_irg_opt(irg, "local");
 627                 do_irg_opt(irg, "dead");
 628         }
 629
 630         do_irp_opt("inline");
 631         do_irp_opt("opt-proc-clone");
 632
 633         for (i = 0; i < get_irp_n_irgs(); i++) {
 634                 ir_graph *irg = get_irp_irg(i);
 635                 do_irg_opt(irg, "local");
 636                 do_irg_opt(irg, "control-flow");
 637                 do_irg_opt(irg, "thread-jumps");
 638                 do_irg_opt(irg, "local");
 639                 do_irg_opt(irg, "control-flow");
 640
 641                 if( do_irg_opt(irg, "vrp") ) { // if vrp is enabled
 642                         do_irg_opt(irg, "local");
 643                         do_irg_opt(irg, "vrp");
 644                         do_irg_opt(irg, "local");
 645                         do_irg_opt(irg, "vrp");
 646                 }
 647         }
 648
 649         if (firm_dump.ir_graph) {
 650                 /* recompute backedges for nicer dumps */
 651                 for (i = 0; i < get_irp_n_irgs(); i++)
 652                         construct_cf_backedges(get_irp_irg(i));
 653         }
 654
 655         dump_all("opt");
 656
 657         if (firm_dump.statistic & STAT_AFTER_OPT)
 658                 stat_dump_snapshot(input_filename, "opt");
 659
 660         timer_stop(t_all_opt);
 661 }
 662
 663 /**
 664  * do Firm lowering
 665  *
 666  * @param input_filename  the name of the (main) source file
 667  */
 668 static void do_firm_lowering(const char *input_filename)
 669 {
 670         int i;
 671
 672         /* enable architecture dependent optimizations */
 673         arch_dep_set_opts((arch_dep_opts_t)
 674                         ((firm_opt.muls ? arch_dep_mul_to_shift : arch_dep_none) |
 675                          (firm_opt.divs ? arch_dep_div_by_const : arch_dep_none) |
 676                          (firm_opt.mods ? arch_dep_mod_by_const : arch_dep_none) ));
 677         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 678                 ir_graph *irg = get_irp_irg(i);
 679                 do_irg_opt(irg, "reassociation");
 680                 do_irg_opt(irg, "local");
 681         }
 682
 683         do_irp_opt("target-lowering");
 684
 685         if (firm_dump.statistic & STAT_AFTER_LOWER)
 686                 stat_dump_snapshot(input_filename, "low");
 687
 688         timer_start(t_all_opt);
 689
 690         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 691                 ir_graph *irg = get_irp_irg(i);
 692
 693                 do_irg_opt(irg, "lower-blockcopy");
 694                 do_irg_opt(irg, "local");
 695                 do_irg_opt(irg, "deconv");
 696                 do_irg_opt(irg, "control-flow");
 697                 do_irg_opt(irg, "opt-load-store");
 698                 do_irg_opt(irg, "gcse");
 699                 do_irg_opt(irg, "place");
 700                 do_irg_opt(irg, "control-flow");
 701
 702                 if (do_irg_opt(irg, "vrp")) {
 703                         do_irg_opt(irg, "local");
 704                         do_irg_opt(irg, "control-flow");
 705                         do_irg_opt(irg, "vrp");
 706                         do_irg_opt(irg, "local");
 707                         do_irg_opt(irg, "control-flow");
 708                 }
 709
 710                 if (do_irg_opt(irg, "if-conversion")) {
 711                         do_irg_opt(irg, "local");
 712                         do_irg_opt(irg, "control-flow");
 713                 }
 714
 715                 set_irg_state(irg, IR_GRAPH_STATE_NORMALISATION2);
 716                 do_irg_opt(irg, "local");
 717
 718                 do_irg_opt(irg, "parallelize-mem");
 719                 do_irg_opt(irg, "frame");
 720         }
 721         do_irp_opt("remove-unused");
 722         do_irp_opt("opt-cc");
 723         timer_stop(t_all_opt);
 724         dump_all("low-opt");
 725
 726         if (firm_dump.statistic & STAT_FINAL) {
 727                 stat_dump_snapshot(input_filename, "final");
 728         }
 729 }
 730
 731 /**
 732  * Initialize for the Firm-generating back end.
 733  */
 734 void gen_firm_init(void)
 735 {
 736         unsigned pattern = 0;
 737         int      i;
 738
 739         for (i = 0; i < n_opts; ++i) {
 740                 opts[i].timer = ir_timer_new();
 741                 timer_register(opts[i].timer, opts[i].description);
 742         }
 743         t_verify = ir_timer_new();
 744         timer_register(t_verify, "Firm: verify pass");
 745         t_vcg_dump = ir_timer_new();
 746         timer_register(t_vcg_dump, "Firm: vcg dumping");
 747         t_all_opt = ir_timer_new();
 748         timer_register(t_all_opt, "Firm: all optimizations");
 749
 750         if (firm_dump.stat_pattern)
 751                 pattern |= FIRMSTAT_PATTERN_ENABLED;
 752
 753         if (firm_dump.stat_dag)
 754                 pattern |= FIRMSTAT_COUNT_DAG;
 755
 756         ir_init(NULL);
 757         firm_init_stat(firm_dump.statistic == STAT_NONE ?
 758                         0 : FIRMSTAT_ENABLED | FIRMSTAT_COUNT_STRONG_OP
 759                         | FIRMSTAT_COUNT_CONSTS | pattern);
 760
 761         edges_init_dbg(firm_opt.verify_edges);
 762
 763         /* Sel node cannot produce NULL pointers */
 764         set_opt_sel_based_null_check_elim(1);
 765
 766         /* dynamic dispatch works currently only if whole world scenarios */
 767         set_opt_dyn_meth_dispatch(0);
 768
 769         /* do not run architecture dependent optimizations in building phase */
 770         arch_dep_set_opts(arch_dep_none);
 771
 772         do_node_verification((firm_verification_t) firm_opt.verify);
 773         if (firm_dump.extbb)
 774                 ir_add_dump_flags(ir_dump_flag_group_extbb);
 775         if (firm_dump.no_blocks)
 776                 ir_remove_dump_flags(ir_dump_flag_blocks_as_subgraphs);
 777
 778         set_optimize(1);
 779         set_opt_constant_folding(firm_opt.const_folding);
 780         set_opt_algebraic_simplification(firm_opt.const_folding);
 781         set_opt_cse(firm_opt.cse);
 782         set_opt_global_cse(0);
 783         set_opt_unreachable_code(1);
 784 }
 785
 786 /**
 787  * Called, after the Firm generation is completed,
 788  * do all optimizations and backend call here.
 789  *
 790  * @param out                a file handle for the output, may be NULL
 791  * @param input_filename     the name of the (main) source file
 792  * @param c_mode             non-zero if "C" was compiled
 793  */
 794 void gen_firm_finish(FILE *out, const char *input_filename)
 795 {
 796         int i;
 797
 798         /* the general for dumping option must be set, or the others will not work*/
 799         firm_dump.ir_graph
 800                 = (bool) (firm_dump.ir_graph | firm_dump.all_phases | firm_dump.extbb);
 801
 802         ir_add_dump_flags(ir_dump_flag_keepalive_edges
 803                         | ir_dump_flag_consts_local | ir_dump_flag_dominance);
 804         ir_remove_dump_flags(ir_dump_flag_loops | ir_dump_flag_ld_names);
 805
 806         /* FIXME: cloning might ADD new graphs. */
 807         irg_dump_no = calloc(get_irp_last_idx(), sizeof(*irg_dump_no));
 808
 809         if (firm_dump.all_types) {
 810                 dump_ir_prog_ext(dump_typegraph, "types.vcg");
 811         }
 812
 813         /* finalize all graphs */
 814         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 815                 ir_graph *irg = get_irp_irg(i);
 816                 irg_finalize_cons(irg);
 817         }
 818         dump_all("");
 819
 820         timer_push(t_verify);
 821         tr_verify();
 822         timer_pop(t_verify);
 823
 824         /* all graphs are finalized, set the irp phase to high */
 825         set_irp_phase_state(phase_high);
 826
 827         /* BEWARE: kill unreachable code before doing compound lowering */
 828         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 829                 ir_graph *irg = get_irp_irg(i);
 830                 do_irg_opt(irg, "control-flow");
 831                 do_irg_opt(irg, "lower-blockcopy");
 832         }
 833
 834         if (firm_dump.statistic & STAT_BEFORE_OPT) {
 835                 stat_dump_snapshot(input_filename, "noopt");
 836         }
 837
 838         do_firm_optimizations(input_filename);
 839         do_firm_lowering(input_filename);
 840
 841         /* set the phase to low */
 842         for (i = get_irp_n_irgs() - 1; i >= 0; --i)
 843                 set_irg_phase_state(get_irp_irg(i), phase_low);
 844
 845         if (firm_dump.statistic & STAT_FINAL_IR)
 846                 stat_dump_snapshot(input_filename, "final-ir");
 847
 848         /* run the code generator */
 849         ir_timer_t *timer = ir_timer_new();
 850         timer_register(timer, "Firm: backend");
 851         timer_start(timer);
 852         be_main(out, input_filename);
 853         timer_stop(timer);
 854
 855         if (firm_dump.statistic & STAT_FINAL)
 856                 stat_dump_snapshot(input_filename, "final");
 857 }
 858
 859 static void disable_all_opts(void)
 860 {
 861         firm_opt.cse             = false;
 862         firm_opt.confirm         = false;
 863         firm_opt.muls            = false;
 864         firm_opt.divs            = false;
 865         firm_opt.mods            = false;
 866         firm_opt.alias_analysis  = false;
 867         firm_opt.strict_alias    = false;
 868         firm_opt.no_alias        = false;
 869
 870         for (int i = 0; i < n_opts; ++i) {
 871                 opt_config_t *config = &opts[i];
 872                 if (config->flags & OPT_FLAG_ESSENTIAL) {
 873                         config->flags |= OPT_FLAG_ENABLED;
 874                 } else {
 875                         config->flags &= ~OPT_FLAG_ENABLED;
 876                 }
 877         }
 878 }
 879
 880 static bool firm_opt_option(const char *opt)
 881 {
 882         bool enable = true;
 883         if (strncmp(opt, "no-", 3) == 0) {
 884                 enable = false;
 885                 opt = opt + 3;
 886         }
 887
 888         opt_config_t *config = get_opt(opt);
 889         if (config == NULL || (config->flags & OPT_FLAG_HIDE_OPTIONS))
 890                 return false;
 891
 892         config->flags &= ~OPT_FLAG_ENABLED;
 893         config->flags |= enable ? OPT_FLAG_ENABLED : 0;
 894         return true;
 895 }
 896
 897 void firm_option_help(print_option_help_func print_option_help)
 898 {
 899         print_option_help(firm_options[0].option, firm_options[0].description);
 900
 901         for (int i = 0; i < n_opts; ++i) {
 902                 char buf[1024];
 903                 char buf2[1024];
 904
 905                 const opt_config_t *config = &opts[i];
 906                 if (config->flags & OPT_FLAG_HIDE_OPTIONS)
 907                         continue;
 908
 909                 snprintf(buf, sizeof(buf), "-f%s", config->name);
 910                 snprintf(buf2, sizeof(buf2), "enable %s", config->description);
 911                 print_option_help(buf, buf2);
 912                 snprintf(buf, sizeof(buf), "-fno-%s", config->name);
 913                 snprintf(buf2, sizeof(buf2), "disable %s", config->description);
 914                 print_option_help(buf, buf2);
 915         }
 916
 917         size_t const n_options = sizeof(firm_options)/sizeof(firm_options[0]);
 918         for (size_t k = 0; k < n_options; ++k) {
 919                 char buf[1024];
 920                 char buf2[1024];
 921                 snprintf(buf, sizeof(buf), "-f%s", firm_options[k].option);
 922                 snprintf(buf2, sizeof(buf2), "%s", firm_options[k].description);
 923                 print_option_help(buf, buf2);
 924         }
 925 }
 926
 927 int firm_option(const char *const opt)
 928 {
 929         char const* val;
 930         if ((val = strstart(opt, "dump-filter="))) {
 931                 ir_set_dump_filter(val);
 932                 return 1;
 933         } else if ((val = strstart(opt, "clone-threshold="))) {
 934                 sscanf(val, "%d", &firm_opt.clone_threshold);
 935                 return 1;
 936         } else if ((val = strstart(opt, "inline-max-size="))) {
 937                 sscanf(val, "%u", &firm_opt.inline_maxsize);
 938                 return 1;
 939         } else if ((val = strstart(opt, "inline-threshold="))) {
 940                 sscanf(val, "%u", &firm_opt.inline_threshold);
 941                 return 1;
 942         } else if (streq(opt, "no-opt")) {
 943                 disable_all_opts();
 944                 return 1;
 945         }
 946
 947         size_t const len = strlen(opt);
 948         size_t const n_options = sizeof(firm_options)/sizeof(firm_options[0]);
 949         for (size_t i = n_options; i != 0;) {
 950                 struct params const* const o = &firm_options[--i];
 951                 if (len == o->opt_len && strncmp(opt, o->option, len) == 0) {
 952                         /* statistic options do accumulate */
 953                         if (o->flag == &firm_dump.statistic)
 954                                 *o->flag = (bool) (*o->flag | o->set);
 955                         else
 956                                 *o->flag = o->set;
 957
 958                         return 1;
 959                 }
 960         }
 961
 962         /* maybe this enables/disables optimizations */
 963         if (firm_opt_option(opt))
 964                 return 1;
 965
 966         return 0;
 967 }
 968
 969 static void set_be_option(const char *arg)
 970 {
 971         int res = be_parse_arg(arg);
 972         (void) res;
 973         assert(res);
 974 }
 975
 976 static void set_option(const char *arg)
 977 {
 978         int res = firm_option(arg);
 979         (void) res;
 980         assert(res);
 981 }
 982
 983 void choose_optimization_pack(int level)
 984 {
 985         /* apply optimization level */
 986         switch(level) {
 987         case 0:
 988                 set_option("no-opt");
 989                 break;
 990         case 1:
 991                 set_option("no-inline");
 992                 break;
 993         default:
 994         case 4:
 995                 /* use_builtins = true; */
 996                 /* fallthrough */
 997         case 3:
 998                 set_option("thread-jumps");
 999                 set_option("if-conversion");
1000                 /* fallthrough */
1001         case 2:
1002                 set_option("strict-aliasing");
1003                 set_option("inline");
1004                 set_option("fp-vrp");
1005                 set_option("deconv");
1006                 set_be_option("omitfp");
1007                 break;
1008         }
1009 }
1010
1011 /**
1012  * Do very early initializations
1013  */
1014 void firm_early_init(void)
1015 {
1016         /* arg: need this here for command line options */
1017         be_opt_register();
1018
1019         enable_safe_defaults();
1020 }