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