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

   1 /**
   2  *
   3  * @file firm_opt.c -- Firm-generating back end optimizations.
   4  *
   5  * (C) 2005-2009  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 void remove_unused_functions(void)
 204 {
 205         ir_entity **keep_methods;
 206         int         arr_len;
 207
 208         /* Analysis that finds the free methods,
 209            i.e. methods that are dereferenced.
 210            Optimizes polymorphic calls :-). */
 211         cgana(&arr_len, &keep_methods);
 212
 213         /* Remove methods that are never called. */
 214         gc_irgs(arr_len, keep_methods);
 215         free(keep_methods);
 216 }
 217
 218 static int firm_const_exists;
 219
 220 static void do_optimize_funccalls(void)
 221 {
 222         optimize_funccalls(firm_const_exists, NULL);
 223 }
 224
 225 static void do_gcse(ir_graph *irg)
 226 {
 227         set_opt_global_cse(1);
 228         optimize_graph_df(irg);
 229         place_code(irg);
 230         set_opt_global_cse(0);
 231 }
 232
 233 static void do_lower_highlevel(ir_graph *irg)
 234 {
 235         lower_highlevel_graph(irg, firm_opt.lower_bitfields);
 236 }
 237
 238 static void do_if_conv(ir_graph *irg)
 239 {
 240         opt_if_conv(irg, if_conv_info);
 241 }
 242
 243 static void do_stred(ir_graph *irg)
 244 {
 245         opt_osr(irg, osr_flag_default | osr_flag_keep_reg_pressure | osr_flag_ignore_x86_shift);
 246 }
 247
 248 static void after_inline_opt(ir_graph *irg)
 249 {
 250         do_irg_opt(irg, "scalar-replace");
 251         do_irg_opt(irg, "local");
 252         do_irg_opt(irg, "control-flow");
 253         do_irg_opt(irg, "combo");
 254 }
 255
 256 static void do_inline(void)
 257 {
 258         inline_functions(firm_opt.inline_maxsize, firm_opt.inline_threshold,
 259                          after_inline_opt);
 260 }
 261
 262 static void do_cloning(void)
 263 {
 264         proc_cloning((float) firm_opt.clone_threshold);
 265 }
 266
 267 static void do_lower_switch(ir_graph *irg)
 268 {
 269         lower_switch(irg, firm_opt.spare_size);
 270 }
 271
 272 static void do_lower_dw_ops(void)
 273 {
 274         lwrdw_param_t init = {
 275                 1,
 276                 1,
 277                 get_atomic_mode(ATOMIC_TYPE_LONGLONG),
 278                 get_atomic_mode(ATOMIC_TYPE_ULONGLONG),
 279                 get_atomic_mode(ATOMIC_TYPE_INT),
 280                 get_atomic_mode(ATOMIC_TYPE_UINT),
 281                 def_create_intrinsic_fkt,
 282                 NULL
 283         };
 284
 285         if (arch_create_intrinsic) {
 286                 init.create_intrinsic = arch_create_intrinsic;
 287                 init.ctx              = create_intrinsic_ctx;
 288         }
 289         lower_dw_ops(&init);
 290 }
 291
 292 typedef enum opt_target {
 293         OPT_TARGET_IRG, /**< optimization function works on a single graph */
 294         OPT_TARGET_IRP  /**< optimization function works on the complete program */
 295 } opt_target_t;
 296
 297 typedef enum opt_flags {
 298         OPT_FLAG_NONE         = 0,
 299         OPT_FLAG_ENABLED      = 1 << 0, /**< enable the optimization */
 300         OPT_FLAG_NO_DUMP      = 1 << 1, /**< don't dump after transformation */
 301         OPT_FLAG_NO_VERIFY    = 1 << 2, /**< don't verify after transformation */
 302         OPT_FLAG_HIDE_OPTIONS = 1 << 3, /**< do not automatically process
 303                                              -foptions for this transformation */
 304 } opt_flags_t;
 305
 306 typedef void (*transform_irg_func)(ir_graph *irg);
 307 typedef void (*transform_irp_func)(void);
 308 typedef void (*func_ptr_t)(void);
 309
 310 typedef struct {
 311         opt_target_t  target;
 312         const char   *name;
 313         func_ptr_t    func;
 314         const char   *description;
 315         opt_flags_t   flags;
 316 } opt_config_t;
 317
 318 static opt_config_t opts[] = {
 319         { OPT_TARGET_IRP, "rts",             (func_ptr_t) rts_map,                 "optimization of known library functions", OPT_FLAG_HIDE_OPTIONS },
 320         { OPT_TARGET_IRG, "combo",           (func_ptr_t) combo,                   "combined CCE, UCE and GVN",               OPT_FLAG_NONE},
 321         { OPT_TARGET_IRG, "control-flow",    (func_ptr_t) optimize_cf,             "optimization of control-flow",            OPT_FLAG_HIDE_OPTIONS },
 322         { OPT_TARGET_IRG, "local",           (func_ptr_t) optimize_graph_df,       "local graph optimizations",               OPT_FLAG_HIDE_OPTIONS },
 323         { OPT_TARGET_IRP, "remove-unused",   (func_ptr_t) remove_unused_functions, "removal of unused functions",             OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
 324         { OPT_TARGET_IRP, "opt-tail-rec",    (func_ptr_t) opt_tail_recursion,      "tail-recursion eliminiation",             OPT_FLAG_NONE },
 325         { OPT_TARGET_IRP, "opt-func-call",   (func_ptr_t) do_optimize_funccalls,   "function call optimization",              OPT_FLAG_NONE },
 326         { OPT_TARGET_IRG, "lower",           (func_ptr_t) do_lower_highlevel,      "lowering",                                OPT_FLAG_HIDE_OPTIONS },
 327         { 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 },
 328         { OPT_TARGET_IRP, "lower-dw",        (func_ptr_t) do_lower_dw_ops,         "lowering of doubleword operations",       OPT_FLAG_HIDE_OPTIONS },
 329         { OPT_TARGET_IRG, "lower-switch",    (func_ptr_t) do_lower_switch,         "switch lowering",                         OPT_FLAG_HIDE_OPTIONS },
 330         { 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 },
 331         { OPT_TARGET_IRG, "scalar-replace",  (func_ptr_t) scalar_replacement_opt,  "scalar replacement",                      OPT_FLAG_NONE },
 332         { OPT_TARGET_IRG, "reassociation",   (func_ptr_t) optimize_reassociation,  "reassociation",                           OPT_FLAG_NONE },
 333         { OPT_TARGET_IRG, "gcse",            (func_ptr_t) do_gcse,                 "global common subexpression elimination", OPT_FLAG_NONE },
 334         { OPT_TARGET_IRG, "place",           (func_ptr_t) place_code,              "code placement",                          OPT_FLAG_NONE },
 335         { OPT_TARGET_IRG, "confirm",         (func_ptr_t) construct_confirms,      "confirm optimisation",                    OPT_FLAG_HIDE_OPTIONS },
 336         { OPT_TARGET_IRG, "opt-load-store",  (func_ptr_t) optimize_load_store,     "load store optimization",                 OPT_FLAG_NONE },
 337         { OPT_TARGET_IRG, "parallelize-mem", (func_ptr_t) opt_parallelize_mem,     "parallelize memory",                      OPT_FLAG_NONE },
 338         { OPT_TARGET_IRG, "deconv",          (func_ptr_t) conv_opt,                "conv node elimination",                   OPT_FLAG_NONE },
 339         { OPT_TARGET_IRG, "thread-jumps",    (func_ptr_t) opt_jumpthreading,       "path-sensitive jumpthreading",            OPT_FLAG_NONE },
 340         { OPT_TARGET_IRG, "remove-confirms", (func_ptr_t) remove_confirms,         "confirm removal",                         OPT_FLAG_HIDE_OPTIONS | OPT_FLAG_NO_DUMP | OPT_FLAG_NO_VERIFY },
 341         { OPT_TARGET_IRG, "gvn-pre",         (func_ptr_t) do_gvn_pre,              "global value numbering partial redundancy elimination", OPT_FLAG_NONE },
 342         { OPT_TARGET_IRG, "if-conversion",   (func_ptr_t) do_if_conv,              "if-conversion",                           OPT_FLAG_NONE },
 343         { OPT_TARGET_IRG, "bool",            (func_ptr_t) opt_bool,                "bool simplification",                     OPT_FLAG_NONE },
 344         { OPT_TARGET_IRG, "shape-blocks",    (func_ptr_t) shape_blocks,            "block shaping",                           OPT_FLAG_NONE },
 345         { OPT_TARGET_IRG, "ivopts",          (func_ptr_t) do_stred,                "induction variable strength reduction",   OPT_FLAG_NONE },
 346         { OPT_TARGET_IRG, "remove-phi-cycles", (func_ptr_t) remove_phi_cycles,     "removal of phi cycles",                   OPT_FLAG_HIDE_OPTIONS },
 347         { 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 },
 348         { OPT_TARGET_IRP, "inline",          (func_ptr_t) do_inline,               "inlining",                                OPT_FLAG_NONE },
 349         { OPT_TARGET_IRP, "opt-proc-clone",  (func_ptr_t) do_cloning,              "procedure cloning",                       OPT_FLAG_NONE },
 350         { OPT_TARGET_IRG, "invert-loops",    (func_ptr_t) do_loop_inversion,       "loop inversion",                          OPT_FLAG_NONE },
 351         { OPT_TARGET_IRG, "peel-loops",      (func_ptr_t) do_loop_peeling,         "loop peeling",                            OPT_FLAG_NONE },
 352 };
 353 static const int n_opts = sizeof(opts) / sizeof(opts[0]);
 354 ir_timer_t *timers[sizeof(opts)/sizeof(opts[0])];
 355
 356 static opt_config_t *get_opt(const char *name)
 357 {
 358         int i;
 359         for (i = 0; i < n_opts; ++i) {
 360                 opt_config_t *config = &opts[i];
 361                 if (strcmp(config->name, name) == 0)
 362                         return config;
 363         }
 364
 365         return NULL;
 366 }
 367
 368 static void set_opt_enabled(const char *name, bool enabled)
 369 {
 370         opt_config_t *config = get_opt(name);
 371         config->flags = (config->flags & ~OPT_FLAG_ENABLED)
 372                 | (enabled ? OPT_FLAG_ENABLED : 0);
 373 }
 374
 375 static bool get_opt_enabled(const char *name)
 376 {
 377         opt_config_t *config = get_opt(name);
 378         return (config->flags & OPT_FLAG_ENABLED) != 0;
 379 }
 380
 381 /**
 382  * perform an optimisation on a single graph
 383  *
 384  * @return  true if something changed, false otherwise
 385  */
 386 static bool do_irg_opt(ir_graph *irg, const char *name)
 387 {
 388         transform_irg_func  func;
 389         ir_graph           *old_irg;
 390         opt_config_t       *config = get_opt(name);
 391         size_t              n      = config - opts;
 392         assert(config != NULL);
 393         assert(config->target == OPT_TARGET_IRG);
 394         if (! (config->flags & OPT_FLAG_ENABLED))
 395                 return false;
 396
 397
 398         old_irg          = current_ir_graph;
 399         current_ir_graph = irg;
 400
 401         func = (transform_irg_func) config->func;
 402
 403         timer_push(timers[n]);
 404         func(irg);
 405         timer_pop(timers[n]);
 406
 407         if (firm_dump.all_phases && firm_dump.ir_graph) {
 408                 dump_graph_count(irg, name);
 409         }
 410
 411         if (firm_opt.check_all) {
 412                 timer_push(t_verify);
 413                 irg_verify(irg, VRFY_ENFORCE_SSA);
 414                 timer_pop(t_verify);
 415         }
 416
 417         current_ir_graph = old_irg;
 418         return true;
 419 }
 420
 421 static void do_irp_opt(const char *name)
 422 {
 423         transform_irp_func  func;
 424         opt_config_t       *config = get_opt(name);
 425         size_t              n      = config - opts;
 426         assert(config->target == OPT_TARGET_IRP);
 427         if (! (config->flags & OPT_FLAG_ENABLED))
 428                 return;
 429
 430         func = (transform_irp_func) config->func;
 431
 432         timer_push(timers[n]);
 433         func();
 434         timer_pop(timers[n]);
 435
 436         if (firm_dump.ir_graph && firm_dump.all_phases) {
 437                 int i;
 438                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 439                         ir_graph *irg = get_irp_irg(i);
 440                         dump_graph_count(irg, name);
 441                 }
 442         }
 443
 444         if (firm_opt.check_all) {
 445                 int i;
 446                 timer_push(t_verify);
 447                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 448                         irg_verify(get_irp_irg(i), VRFY_ENFORCE_SSA);
 449                 }
 450                 timer_pop(t_verify);
 451         }
 452 }
 453
 454 /**
 455  * Enable transformations which should be always safe (and cheap) to perform
 456  */
 457 static void enable_safe_defaults(void)
 458 {
 459         set_opt_enabled("remove-unused", true);
 460         set_opt_enabled("opt-tail-rec", true);
 461         set_opt_enabled("opt-func-call", true);
 462         set_opt_enabled("reassociation", true);
 463         set_opt_enabled("control-flow", true);
 464         set_opt_enabled("local", true);
 465         set_opt_enabled("lower-const", true);
 466         set_opt_enabled("scalar-replace", true);
 467         set_opt_enabled("place", true);
 468         set_opt_enabled("confirm", true);
 469         set_opt_enabled("opt-load-store", true);
 470         set_opt_enabled("lower", true);
 471         set_opt_enabled("deconv", true);
 472         set_opt_enabled("remove-confirms", true);
 473         set_opt_enabled("ivopts", true);
 474         set_opt_enabled("dead", true);
 475         set_opt_enabled("lower-switch", true);
 476         set_opt_enabled("remove-phi-cycles", true);
 477 }
 478
 479 /**
 480  * run all the Firm optimizations
 481  *
 482  * @param input_filename     the name of the (main) source file
 483  */
 484 static void do_firm_optimizations(const char *input_filename)
 485 {
 486         int      i;
 487         unsigned aa_opt;
 488
 489         set_opt_alias_analysis(firm_opt.alias_analysis);
 490
 491         aa_opt = aa_opt_no_opt;
 492         if (firm_opt.strict_alias)
 493                 aa_opt |= aa_opt_type_based | aa_opt_byte_type_may_alias;
 494         if (firm_opt.no_alias)
 495                 aa_opt = aa_opt_no_alias;
 496
 497         set_irp_memory_disambiguator_options(aa_opt);
 498
 499         /* parameter passing code should set them directly sometime... */
 500         set_opt_enabled("rts", !firm_opt.freestanding);
 501         set_opt_enabled("gcse", firm_opt.gcse);
 502         set_opt_enabled("place", !firm_opt.gcse);
 503         set_opt_enabled("confirm", firm_opt.confirm);
 504         set_opt_enabled("remove-confirms", firm_opt.confirm);
 505
 506         /* osr supersedes remove_phi_cycles */
 507         if (get_opt_enabled("ivopts"))
 508                 set_opt_enabled("remove-phi-cycles", false);
 509
 510         timer_start(t_all_opt);
 511
 512         do_irp_opt("rts");
 513
 514         /* first step: kill dead code */
 515         for (i = 0; i < get_irp_n_irgs(); i++) {
 516                 ir_graph *irg = get_irp_irg(i);
 517                 do_irg_opt(irg, "combo");
 518                 do_irg_opt(irg, "local");
 519                 do_irg_opt(irg, "control-flow");
 520         }
 521
 522         do_irp_opt("remove-unused");
 523         do_irp_opt("opt-tail-rec");
 524         do_irp_opt("opt-func-call");
 525         do_irp_opt("lower-const");
 526
 527         for (i = 0; i < get_irp_n_irgs(); i++) {
 528                 ir_graph *irg = get_irp_irg(i);
 529
 530                 do_irg_opt(irg, "scalar-replace");
 531                 do_irg_opt(irg, "invert-loops");
 532                 do_irg_opt(irg, "local");
 533                 do_irg_opt(irg, "reassociation");
 534                 do_irg_opt(irg, "local");
 535                 do_irg_opt(irg, "gcse");
 536
 537                 if (firm_opt.confirm) {
 538                         /* Confirm construction currently can only handle blocks with only
 539                            one control flow predecessor. Calling optimize_cf here removes
 540                            Bad predecessors and help the optimization of switch constructs.
 541                          */
 542                         do_irg_opt(irg, "control-flow");
 543                         do_irg_opt(irg, "confirm");
 544                         do_irg_opt(irg, "local");
 545                 }
 546
 547                 do_irg_opt(irg, "control-flow");
 548                 do_irg_opt(irg, "opt-load-store");
 549                 do_irg_opt(irg, "lower");
 550                 do_irg_opt(irg, "deconv");
 551                 do_irg_opt(irg, "thread-jumps");
 552                 do_irg_opt(irg, "remove-confirms");
 553                 do_irg_opt(irg, "gvn-pre");
 554                 do_irg_opt(irg, "place");
 555                 do_irg_opt(irg, "control-flow");
 556
 557                 if (do_irg_opt(irg, "if-conversion")) {
 558                         do_irg_opt(irg, "local");
 559                         do_irg_opt(irg, "control-flow");
 560                 }
 561
 562                 do_irg_opt(irg, "bool");
 563                 do_irg_opt(irg, "shape-blocks");
 564                 do_irg_opt(irg, "lower-switch");
 565                 do_irg_opt(irg, "ivopts");
 566                 do_irg_opt(irg, "local");
 567                 do_irg_opt(irg, "dead");
 568         }
 569
 570         do_irp_opt("inline");
 571         do_irp_opt("opt-proc-clone");
 572
 573         for (i = 0; i < get_irp_n_irgs(); i++) {
 574                 ir_graph *irg = get_irp_irg(i);
 575                 do_irg_opt(irg, "local");
 576                 do_irg_opt(irg, "control-flow");
 577                 do_irg_opt(irg, "thread-jumps");
 578                 do_irg_opt(irg, "local");
 579                 do_irg_opt(irg, "control-flow");
 580         }
 581
 582         if (firm_dump.ir_graph) {
 583                 /* recompute backedges for nicer dumps */
 584                 for (i = 0; i < get_irp_n_irgs(); i++)
 585                         construct_cf_backedges(get_irp_irg(i));
 586         }
 587
 588         do_irp_opt("remove-unused");
 589
 590         dump_all("-opt");
 591
 592         if (firm_dump.statistic & STAT_AFTER_OPT)
 593                 stat_dump_snapshot(input_filename, "opt");
 594
 595         timer_stop(t_all_opt);
 596 }
 597
 598 /**
 599  * compute the size of a type (do implicit lowering)
 600  *
 601  * @param ty   a Firm type
 602  */
 603 static int compute_type_size(ir_type *ty)
 604 {
 605         optimization_state_t state;
 606         unsigned             align_all = 1;
 607         int                  n, size = 0, set = 0;
 608         int                  i, dims, s;
 609
 610         if (get_type_state(ty) == layout_fixed) {
 611                 /* do not layout already layouted types again */
 612                 return 1;
 613         }
 614
 615         if (is_Method_type(ty) || ty == get_glob_type()) {
 616                 /* no need for size calculation for method types or the global type */
 617                 return 1;
 618         }
 619
 620         DBG(("compute type size visiting: %s\n", get_type_name(ty)));
 621
 622         switch (get_type_tpop_code(ty)) {
 623         case tpo_class:
 624         case tpo_struct:
 625                 for (i = 0, n = get_compound_n_members(ty); i < n; ++i) {
 626                         ir_entity *ent  = get_compound_member(ty, i);
 627                         ir_type *ent_ty = get_entity_type(ent);
 628                         unsigned align, misalign;
 629
 630                         /* inner functions do not expand the frame */
 631                         if (is_Method_type(ent_ty) && is_frame_type(ty))
 632                                 continue;
 633
 634                         /* compute member types */
 635                         if (! compute_type_size(ent_ty))
 636                                 return 0;
 637
 638                         align     = get_type_alignment_bytes(ent_ty);
 639                         align_all = align > align_all ? align : align_all;
 640                         misalign  = (align ? size % align : 0);
 641                         size     += (misalign ? align - misalign : 0);
 642
 643                         set_entity_offset(ent, size);
 644                         size += get_type_size_bytes(ent_ty);
 645
 646                         DBG(("  member %s %s -> (size: %u, align: %u)\n",
 647                                                 get_type_name(ent_ty), get_entity_name(ent),
 648                                                 get_type_size_bytes(ent_ty), get_type_alignment_bytes(ent_ty)));
 649                 }
 650                 if (align_all > 0 && size % align_all) {
 651                         DBG(("align of the struct member: %u, type size: %d\n", align_all, size));
 652                         size += align_all - (size % align_all);
 653                         DBG(("correcting type-size to %d\n", size));
 654                 }
 655                 set_type_alignment_bytes(ty, align_all);
 656                 set = 1;
 657                 break;
 658
 659         case tpo_union:
 660                 for (i = 0, n = get_union_n_members(ty); i < n; ++i) {
 661                         ir_entity *ent = get_union_member(ty, i);
 662
 663                         if (! compute_type_size(get_entity_type(ent)))
 664                                 return 0;
 665                         s = get_type_size_bytes(get_entity_type(ent));
 666
 667                         set_entity_offset(ent, 0);
 668                         size = (s > size ? s : size);
 669                 }
 670                 set = 1;
 671                 break;
 672
 673         case tpo_array:
 674                 dims = get_array_n_dimensions(ty);
 675
 676                 if (! compute_type_size(get_array_element_type(ty)))
 677                         return 0;
 678
 679                 size = 1;
 680
 681                 save_optimization_state(&state);
 682                 set_optimize(1);
 683                 set_opt_constant_folding(1);
 684                 set_opt_algebraic_simplification(1);
 685
 686                 for (i = 0; i < dims; ++i) {
 687                         ir_node *lower   = get_array_lower_bound(ty, i);
 688                         ir_node *upper   = get_array_upper_bound(ty, i);
 689                         ir_graph *rem    = current_ir_graph;
 690                         tarval  *tv_lower, *tv_upper;
 691                         long     val_lower, val_upper;
 692
 693                         current_ir_graph = get_const_code_irg();
 694                         local_optimize_node(lower);
 695                         local_optimize_node(upper);
 696                         current_ir_graph = rem;
 697
 698                         tv_lower = computed_value(lower);
 699                         tv_upper = computed_value(upper);
 700
 701                         if (tv_lower == tarval_bad || tv_upper == tarval_bad) {
 702                                 /*
 703                                  * we cannot calculate the size of this array yet, it
 704                                  * even might be unknown until the end, like argv[]
 705                                  */
 706                                 restore_optimization_state(&state);
 707                                 return 0;
 708                         }
 709
 710                         val_upper = get_tarval_long(tv_upper);
 711                         val_lower = get_tarval_long(tv_lower);
 712                         size     *= val_upper - val_lower;
 713                 }
 714                 restore_optimization_state(&state);
 715
 716                 DBG(("array %s -> (elements: %d, element type size: %d)\n",
 717                                         get_type_name(ty),
 718                                         size, get_type_size_bytes(get_array_element_type(ty))));
 719                 size *= get_type_size_bytes(get_array_element_type(ty));
 720                 set = 1;
 721                 break;
 722
 723         default:
 724                 break;
 725         }
 726
 727         if (set) {
 728                 set_type_size_bytes(ty, size);
 729                 set_type_state(ty, layout_fixed);
 730         }
 731
 732         DBG(("size: %d\n", get_type_size_bytes(ty)));
 733
 734         return set;
 735 }
 736
 737 /**
 738  * layout all non-frame types of the Firm graph
 739  */
 740 static void compute_type_sizes(void)
 741 {
 742         int i;
 743         ir_type *tp;
 744
 745         /* all non-frame other types */
 746         for (i = get_irp_n_types() - 1; i >= 0; --i) {
 747                 tp = get_irp_type(i);
 748                 compute_type_size(tp);
 749
 750                 if (is_Method_type(tp)) {
 751                         tp = get_method_value_res_type(tp);
 752
 753                         if (tp) {
 754                                 /* we have a value result type for this method, lower */
 755                                 compute_type_size(tp);
 756                         }
 757                 }
 758         }
 759 }
 760
 761 /**
 762  * layout all frame-types of the Firm graph
 763  */
 764 static void compute_frame_type_sizes(void)
 765 {
 766         int i;
 767         ir_graph *irg;
 768
 769         /* all frame types */
 770         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 771                 irg = get_irp_irg(i);
 772                 /* do not optimize away variables in debug mode */
 773                 if (firm_opt.debug_mode == DBG_MODE_NONE)
 774                         opt_frame_irg(irg);
 775                 compute_type_size(get_irg_frame_type(irg));
 776         }
 777 }
 778
 779 /**
 780  * do Firm lowering
 781  *
 782  * @param input_filename  the name of the (main) source file
 783  */
 784 static void do_firm_lowering(const char *input_filename)
 785 {
 786         int i;
 787
 788         do_irp_opt("lower-dw");
 789
 790         if (firm_dump.statistic & STAT_AFTER_LOWER)
 791                 stat_dump_snapshot(input_filename, "low");
 792
 793         dump_all("-low");
 794
 795         if (firm_opt.enabled) {
 796                 timer_start(t_all_opt);
 797
 798                 /* run reassociation first on all graphs BEFORE the architecture
 799                    dependent optimizations are enabled */
 800                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 801                         ir_graph *irg = get_irp_irg(i);
 802                         do_irg_opt(irg, "reassociation");
 803                 }
 804
 805                 /* enable architecture dependent optimizations */
 806                 arch_dep_set_opts((arch_dep_opts_t)
 807                                 ((firm_opt.muls ? arch_dep_mul_to_shift : arch_dep_none) |
 808                                  (firm_opt.divs ? arch_dep_div_by_const : arch_dep_none) |
 809                                  (firm_opt.mods ? arch_dep_mod_by_const : arch_dep_none) ));
 810
 811                 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 812                         ir_graph *irg = get_irp_irg(i);
 813
 814                         current_ir_graph = irg;
 815
 816                         do_irg_opt(irg, "local");
 817                         do_irg_opt(irg, "gcse");
 818                         do_irg_opt(irg, "opt-load-store");
 819                         do_irg_opt(irg, "local");
 820                         do_irg_opt(irg, "control-flow");
 821
 822                         if (do_irg_opt(irg, "if-conversion")) {
 823                                 do_irg_opt(irg, "local");
 824                                 do_irg_opt(irg, "control-flow");
 825                         }
 826
 827                         do_irg_opt(irg, "parallelize-mem");
 828                 }
 829                 timer_stop(t_all_opt);
 830
 831                 dump_all("-low-opt");
 832         }
 833
 834         if (firm_opt.cc_opt)
 835                 mark_private_methods();
 836
 837         /* set the phase to low */
 838         for (i = get_irp_n_irgs() - 1; i >= 0; --i)
 839                 set_irg_phase_low(get_irp_irg(i));
 840
 841         /* all graphs are lowered, set the irp phase to low */
 842         set_irp_phase_state(phase_low);
 843
 844         if (firm_dump.statistic & STAT_FINAL) {
 845                 stat_dump_snapshot(input_filename, "final");
 846         }
 847 }
 848
 849 /**
 850  * Initialize for the Firm-generating back end.
 851  */
 852 void gen_firm_init(void)
 853 {
 854         firm_parameter_t params;
 855         unsigned         pattern = 0;
 856         int              i;
 857
 858         for (i = 0; i < n_opts; ++i) {
 859                 timers[i] = ir_timer_new();
 860                 timer_register(timers[i], opts[i].description);
 861         }
 862         t_verify = ir_timer_new();
 863         timer_register(t_verify, "Firm: verify pass");
 864         t_vcg_dump = ir_timer_new();
 865         timer_register(t_vcg_dump, "Firm: vcg dumping");
 866         t_all_opt = ir_timer_new();
 867         timer_register(t_all_opt, "Firm: all optimizations");
 868
 869         if (firm_dump.stat_pattern)
 870                 pattern |= FIRMSTAT_PATTERN_ENABLED;
 871
 872         if (firm_dump.stat_dag)
 873                 pattern |= FIRMSTAT_COUNT_DAG;
 874
 875         memset(&params, 0, sizeof(params));
 876         params.size                  = sizeof(params);
 877         params.enable_statistics     = firm_dump.statistic == STAT_NONE ? 0 :
 878                 FIRMSTAT_ENABLED | FIRMSTAT_COUNT_STRONG_OP | FIRMSTAT_COUNT_CONSTS
 879                 | pattern;
 880         params.initialize_local_func = uninitialized_local_var;
 881         params.cc_mask               = 0; /* no regparam, cdecl */
 882         params.builtin_dbg           = NULL;
 883
 884         ir_init(&params);
 885
 886         if (firm_be_opt.selection == BE_FIRM_BE) {
 887                 const backend_params *be_params = be_get_backend_param();
 888
 889                 if (be_params->do_dw_lowering)
 890                         set_opt_enabled("lower-dw", true);
 891
 892                 arch_create_intrinsic   = be_params->arch_create_intrinsic_fkt;
 893                 create_intrinsic_ctx    = be_params->create_intrinsic_ctx;
 894
 895                 ad_param                = be_params->dep_param;
 896                 if_conv_info            = be_params->if_conv_info;
 897         }
 898
 899         edges_init_dbg(firm_opt.vrfy_edges);
 900
 901         /* Sel node cannot produce NULL pointers */
 902         set_opt_sel_based_null_check_elim(1);
 903
 904         /* dynamic dispatch works currently only if whole world scenarios */
 905         set_opt_dyn_meth_dispatch(0);
 906
 907         arch_dep_init(arch_factory);
 908
 909         /* do not run architecture dependent optimizations in building phase */
 910         arch_dep_set_opts(arch_dep_none);
 911
 912         do_node_verification((firm_verification_t) firm_opt.vrfy);
 913         if (firm_dump.filter)
 914                 only_dump_method_with_name(new_id_from_str(firm_dump.filter));
 915
 916         if (firm_opt.enabled) {
 917                 set_optimize(1);
 918                 set_opt_constant_folding(firm_opt.const_folding);
 919                 set_opt_algebraic_simplification(firm_opt.const_folding);
 920                 set_opt_cse(firm_opt.cse);
 921                 set_opt_global_cse(0);
 922                 set_opt_unreachable_code(1);
 923                 set_opt_control_flow(firm_opt.control_flow);
 924                 set_opt_control_flow_weak_simplification(1);
 925                 set_opt_control_flow_strong_simplification(1);
 926         } else {
 927                 set_optimize(0);
 928         }
 929
 930         /* do not dump entity ld names */
 931         dump_ld_names(0);
 932 }
 933
 934 /**
 935  * Called, after the Firm generation is completed,
 936  * do all optimizations and backend call here.
 937  *
 938  * @param out                a file handle for the output, may be NULL
 939  * @param input_filename     the name of the (main) source file
 940  * @param c_mode             non-zero if "C" was compiled
 941  * @param new_firm_const_exists  non-zero, if the const attribute was used on functions
 942  */
 943 void gen_firm_finish(FILE *out, const char *input_filename, int c_mode,
 944                      int new_firm_const_exists)
 945 {
 946         int i;
 947
 948 #if 0
 949         if (firm_opt.enable_statev) {
 950                 char buf[1024];
 951                 snprintf(buf, sizeof(buf), "%s.ev", input_filename);
 952                 ir_stat_ev_begin(input_filename, firm_opt.statev_filter);
 953                 ir_stat_ev_compilation_unit(input_filename);
 954         }
 955 #endif
 956
 957         firm_const_exists = new_firm_const_exists;
 958
 959         /* the general for dumping option must be set, or the others will not work*/
 960         firm_dump.ir_graph
 961                 = (a_byte) (firm_dump.ir_graph | firm_dump.all_phases | firm_dump.extbb);
 962
 963         dump_keepalive_edges(1);
 964         dump_consts_local(1);
 965         dump_dominator_information(1);
 966         dump_loop_information(0);
 967
 968         if (!firm_dump.edge_labels)
 969                 turn_off_edge_labels();
 970
 971         /* FIXME: cloning might ADD new graphs. */
 972         irg_dump_no = calloc(get_irp_last_idx(), sizeof(*irg_dump_no));
 973
 974         if (firm_dump.all_types) {
 975                 dump_all_types("");
 976                 if (! c_mode) {
 977                         dump_class_hierarchy(0, "");
 978                         dump_class_hierarchy(1, "-with-entities");
 979                 }
 980         }
 981
 982         /* finalize all graphs */
 983         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 984                 ir_graph *irg = get_irp_irg(i);
 985                 irg_finalize_cons(irg);
 986         }
 987         dump_all("");
 988
 989         timer_push(t_verify);
 990         tr_vrfy();
 991         timer_pop(t_verify);
 992
 993         /* all graphs are finalized, set the irp phase to high */
 994         set_irp_phase_state(phase_high);
 995
 996         /* BEWARE: kill unreachable code before doing compound lowering */
 997         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
 998                 ir_graph *irg = get_irp_irg(i);
 999                 do_irg_opt(irg, "control-flow");
1000         }
1001
1002         /* lower all compound call return values */
1003         lower_compound_params();
1004
1005         /* computes the sizes of all types that are still not computed */
1006         compute_type_sizes();
1007
1008         /* lower copyb nodes */
1009         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
1010                 ir_graph *irg = get_irp_irg(i);
1011                 lower_CopyB(irg, 128, 4);
1012         }
1013
1014         if (firm_dump.statistic & STAT_BEFORE_OPT) {
1015                 stat_dump_snapshot(input_filename, "noopt");
1016         }
1017
1018         if (firm_opt.enabled)
1019                 do_firm_optimizations(input_filename);
1020
1021         if (firm_opt.lower)
1022                 do_firm_lowering(input_filename);
1023
1024         /* computes the sizes of all frame types */
1025         compute_frame_type_sizes();
1026
1027         /* set the phase to low */
1028         for (i = get_irp_n_irgs() - 1; i >= 0; --i)
1029                 set_irg_phase_low(get_irp_irg(i));
1030
1031         if (firm_dump.statistic & STAT_FINAL_IR)
1032                 stat_dump_snapshot(input_filename, "final-ir");
1033
1034         /* run the code generator */
1035         if (firm_be_opt.selection != BE_NONE)
1036                 do_codegen(out, input_filename);
1037
1038         if (firm_dump.statistic & STAT_FINAL)
1039                 stat_dump_snapshot(input_filename, "final");
1040 }
1041
1042 int firm_opt_option(const char *opt)
1043 {
1044         bool enable = true;
1045         if (strncmp(opt, "no-", 3) == 0) {
1046                 enable = false;
1047                 opt = opt + 3;
1048         }
1049
1050         opt_config_t *config = get_opt(opt);
1051         if (config == NULL || (config->flags & OPT_FLAG_HIDE_OPTIONS))
1052                 return 0;
1053
1054         config->flags &= ~OPT_FLAG_ENABLED;
1055         config->flags |= enable ? OPT_FLAG_ENABLED : 0;
1056         return 1;
1057 }
1058
1059 void firm_opt_option_help(void)
1060 {
1061         int i;
1062
1063         for (i = 0; i < n_opts; ++i) {
1064                 char buf[1024];
1065                 char buf2[1024];
1066
1067                 const opt_config_t *config = &opts[i];
1068                 if (config->flags & OPT_FLAG_HIDE_OPTIONS)
1069                         continue;
1070
1071                 snprintf(buf2, sizeof(buf2), "firm: enable %s", config->description);
1072                 print_option_help(config->name, buf2);
1073                 snprintf(buf, sizeof(buf), "no-%s", config->name);
1074                 snprintf(buf2, sizeof(buf2), "firm: disable %s", config->description);
1075                 print_option_help(buf, buf2);
1076         }
1077 }
1078
1079 /**
1080  * Do very early initializations
1081  */
1082 void firm_early_init(void)
1083 {
1084         /* arg: need this here for command line options */
1085         be_opt_register();
1086
1087         enable_safe_defaults();
1088 }