X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbemain.c;h=3cc925e6e2d04eb09c40aee32a8f88099f578be0;hb=cbfbedae75798a9830fb0ef090189345ede85dc8;hp=41f20a0ead1242261424dd104b03177a4f1f8b82;hpb=30cd701b908f9b6fd0c6216d5fe7ef54a80da107;p=libfirm diff --git a/ir/be/bemain.c b/ir/be/bemain.c index 41f20a0ea..3cc925e6e 100644 --- a/ir/be/bemain.c +++ b/ir/be/bemain.c @@ -1,7 +1,8 @@ /** * Backend driver. * @author Sebastian Hack - * @date 25.11.2004 + * @date 25.11.2004 + * @cvsid $Id$ */ #ifdef HAVE_CONFIG_H #include "config.h" @@ -12,6 +13,7 @@ #ifdef WITH_LIBCORE #include #include +#include #endif /* WITH_LIBCORE */ #include "obst.h" @@ -27,6 +29,7 @@ #include "irloop_t.h" #include "irtools.h" #include "return.h" +#include "firmstat.h" #include "bearch.h" #include "firm/bearch_firm.h" @@ -43,7 +46,6 @@ #include "besched_t.h" #include "belistsched.h" #include "belive_t.h" -#include "bespillilp.h" #include "bespillbelady.h" #include "bera.h" #include "beraextern.h" @@ -55,65 +57,77 @@ #include "bessadestr.h" #include "beabi.h" #include "belower.h" - -#define DUMP_INITIAL (1 << 0) -#define DUMP_ABI (1 << 1) -#define DUMP_SCHED (1 << 2) -#define DUMP_PREPARED (1 << 3) -#define DUMP_RA (1 << 4) -#define DUMP_FINAL (1 << 5) +#include "beschedmris.h" +#include "bestat.h" +#include "beverify.h" /* options visible for anyone */ static be_options_t be_options = { - /* ilp server */ - "i44pc52.info.uni-karlsruhe.de", - - /* ilp solver */ - "cplex" + DUMP_NONE, /* dump options */ + BE_TIME_OFF, /* no timing */ + "i44pc52.info.uni-karlsruhe.de", /* ilp server */ + "cplex" /* ilp solver */ }; /* dump flags */ -static unsigned dump_flags = 2 * DUMP_FINAL - 1; +static unsigned dump_flags = 0; + +/* verify options */ +static int vrfy_option = BE_VRFY_WARN; /* register allocator to use. */ static const be_ra_t *ra = &be_ra_chordal_allocator; /* back end instruction set architecture to use */ static const arch_isa_if_t *isa_if = &ia32_isa_if; + +/* mris option */ +static int be_enable_mris = 0; + #ifdef WITH_LIBCORE static lc_opt_entry_t *be_grp_root = NULL; /* possible dumping options */ static const lc_opt_enum_mask_items_t dump_items[] = { - { "none", 0 }, + { "none", DUMP_NONE }, { "initial", DUMP_INITIAL }, { "abi", DUMP_ABI }, { "sched", DUMP_SCHED }, { "prepared", DUMP_PREPARED }, { "regalloc", DUMP_RA }, { "final", DUMP_FINAL }, - { "all", 2 * DUMP_FINAL - 1 }, + { "be", DUMP_BE }, + { "all", 2 * DUMP_BE - 1 }, { NULL, 0 } }; /* register allocators */ static const lc_opt_enum_const_ptr_items_t ra_items[] = { - { "chordal", &be_ra_chordal_allocator }, + { "chordal", &be_ra_chordal_allocator }, { "external", &be_ra_external_allocator }, { NULL, NULL } }; /* instruction set architectures. */ static const lc_opt_enum_const_ptr_items_t isa_items[] = { - { "firm", &firm_isa }, { "ia32", &ia32_isa_if }, +#if 0 { "arm", &arm_isa_if }, - { "ppc", &ppc32_isa_if }, + { "ppc32", &ppc32_isa_if }, { "mips", &mips_isa_if }, +#endif { NULL, NULL } }; +/* verify options. */ +static const lc_opt_enum_int_items_t vrfy_items[] = { + { "off", BE_VRFY_OFF }, + { "warn", BE_VRFY_WARN }, + { "assert", BE_VRFY_ASSERT }, + { NULL, 0 } +}; + static lc_opt_enum_mask_var_t dump_var = { &dump_flags, dump_items }; @@ -126,10 +140,18 @@ static lc_opt_enum_const_ptr_var_t isa_var = { (const void **) &isa_if, isa_items }; +static lc_opt_enum_int_var_t vrfy_var = { + &vrfy_option, vrfy_items +}; + static const lc_opt_table_entry_t be_main_options[] = { - LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var), - LC_OPT_ENT_ENUM_PTR("ra", "register allocator", &ra_var), - LC_OPT_ENT_ENUM_PTR("isa", "the instruction set architecture", &isa_var), + LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var), + LC_OPT_ENT_ENUM_PTR ("ra", "register allocator", &ra_var), + LC_OPT_ENT_ENUM_PTR ("isa", "the instruction set architecture", &isa_var), + LC_OPT_ENT_NEGBOOL ("noomitfp", "do not omit frame pointer", &be_omit_fp), + LC_OPT_ENT_BOOL ("mris", "enable mris schedule preparation", &be_enable_mris), + LC_OPT_ENT_ENUM_PTR ("vrfy", "verify the backend irg (off, warn, assert)", &vrfy_var), + LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing), #ifdef WITH_ILP LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)), @@ -145,48 +167,93 @@ void be_opt_register(void) #ifdef WITH_LIBCORE int i; lc_opt_entry_t *be_grp_ra; - - be_grp_root = lc_opt_get_grp(firm_opt_get_root(), "be"); - be_grp_ra = lc_opt_get_grp(be_grp_root, "ra"); - - lc_opt_add_table(be_grp_root, be_main_options); - - /* register allocator options */ - for(i = 0; ra_items[i].name != NULL; ++i) { - const be_ra_t *ra = ra_items[i].value; - ra->register_options(be_grp_ra); + static int run_once = 0; + + if (! run_once) { + run_once = 1; + be_grp_root = lc_opt_get_grp(firm_opt_get_root(), "be"); + be_grp_ra = lc_opt_get_grp(be_grp_root, "ra"); + + lc_opt_add_table(be_grp_root, be_main_options); + + /* register allocator options */ + for(i = 0; ra_items[i].name != NULL; ++i) { + const be_ra_t *ra = ra_items[i].value; + ra->register_options(be_grp_ra); + } + + /* register isa options */ + for(i = 0; isa_items[i].name != NULL; ++i) { + const arch_isa_if_t *isa = isa_items[i].value; + isa->register_options(be_grp_root); + } } +#endif /* WITH_LIBCORE */ +} - /* register isa options */ - for(i = 0; isa_items[i].name != NULL; ++i) { - const arch_isa_if_t *isa = isa_items[i].value; - isa->register_options(be_grp_root); +/* Parse one argument. */ +int be_parse_arg(const char *arg) { +#ifdef WITH_LIBCORE + if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) { + lc_opt_print_help(be_grp_root, stdout); + return -1; } + return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL); +#else + return 0; #endif /* WITH_LIBCORE */ } +/** The be parameters returned by default, all off. */ +const static backend_params be_params = { + NULL, + NULL, + 0, + NULL, +}; + +/* Perform schedule verification if requested. */ +static void be_sched_vrfy(ir_graph *irg, int vrfy_opt) { + if (vrfy_opt == BE_VRFY_WARN) { + be_verify_schedule(irg); + } + else if (vrfy_opt == BE_VRFY_ASSERT) { + assert(be_verify_schedule(irg) && "Schedule verification failed."); + } +} -void be_init(void) +/* Initialize the Firm backend. Must be run BEFORE init_firm()! */ +const backend_params *be_init(void) { be_opt_register(); be_sched_init(); - be_liveness_init(); be_numbering_init(); be_copy_opt_init(); copystat_init(); phi_class_init(); + + if (isa_if->get_params) + return isa_if->get_params(); + return &be_params; } -static be_main_env_t *be_init_env(be_main_env_t *env) +/** + * Initializes the main environment for the backend. + * + * @param env an empty environment + * @param file_handle the file handle where the output will be written to + */ +static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle) { memset(env, 0, sizeof(*env)); obstack_init(&env->obst); env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0])); env->options = &be_options; + env->options->dump_flags = dump_flags; FIRM_DBG_REGISTER(env->dbg, "be.main"); - arch_env_init(env->arch_env, isa_if); + arch_env_init(env->arch_env, isa_if, file_handle); /* Register the irn handler of the architecture */ if (arch_isa_get_irn_handler(env->arch_env->isa)) @@ -211,8 +278,17 @@ static void be_done_env(be_main_env_t *env) obstack_free(&env->obst, NULL); } +/** + * A wrapper around a firm dumper. Dumps only, if + * flags are enabled. + * + * @param mask a bitmask containing the reason what will be dumped + * @param irg the IR graph to dump + * @param suffix the suffix for the dumper + * @param dumper the dumper to be called + */ static void dump(int mask, ir_graph *irg, const char *suffix, - void (*dumper)(ir_graph *, const char *)) + void (*dumper)(ir_graph *, const char *)) { if(dump_flags & mask) be_dump(irg, suffix, dumper); @@ -252,22 +328,85 @@ static void prepare_graph(be_irg_t *birg) * The Firm backend main loop. * Do architecture specific lowering for all graphs * and call the architecture specific code generator. + * + * @param file_handle the file handle the output will be written to */ static void be_main_loop(FILE *file_handle) { int i, n; arch_isa_t *isa; be_main_env_t env; + unsigned num_nodes_b = 0; + unsigned num_nodes_a = 0; + unsigned num_nodes_r = 0; + lc_timer_t *t_prolog, *t_abi, *t_codegen, *t_sched, *t_constr, *t_regalloc, *t_finish, *t_emit, *t_other, *t_verify; + be_ra_timer_t *ra_timer; + + if (be_options.timing == BE_TIME_ON) { + t_prolog = lc_timer_register("prolog", "prolog"); + t_abi = lc_timer_register("beabi", "be abi introduction"); + t_codegen = lc_timer_register("codegen", "codegeneration"); + t_sched = lc_timer_register("sched", "scheduling"); + t_constr = lc_timer_register("constr", "assure constraints"); + t_regalloc = lc_timer_register("regalloc", "register allocation"); + t_finish = lc_timer_register("finish", "graph finish"); + t_emit = lc_timer_register("emiter", "code emiter"); + t_verify = lc_timer_register("verify", "graph verification"); + t_other = lc_timer_register("other", "other"); + } - be_init_env(&env); + be_init_env(&env, file_handle); isa = arch_env_get_isa(env.arch_env); + /* for debugging, anchors helps */ + // dump_all_anchors(1); + +#define BE_TIMER_PUSH(timer) \ + if (be_options.timing == BE_TIME_ON) { \ + int res = lc_timer_push(timer); \ + if (vrfy_option == BE_VRFY_ASSERT) \ + assert(res && "Timer already on stack, cannot be pushed twice."); \ + else if (vrfy_option == BE_VRFY_WARN && ! res) \ + fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \ + lc_timer_get_name(timer)); \ + } +#define BE_TIMER_POP(timer) \ + if (be_options.timing == BE_TIME_ON) { \ + lc_timer_t *tmp = lc_timer_pop(); \ + if (vrfy_option == BE_VRFY_ASSERT) \ + assert(tmp == timer && "Attempt to pop wrong timer."); \ + else if (vrfy_option == BE_VRFY_WARN && tmp != timer) \ + fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \ + lc_timer_get_name(tmp), lc_timer_get_name(timer)); \ + timer = tmp; \ + } + +#define BE_TIMER_ONLY(code) if (be_options.timing == BE_TIME_ON) do { code; } while(0) + /* For all graphs */ - for(i = 0, n = get_irp_n_irgs(); i < n; ++i) { + for (i = 0, n = get_irp_n_irgs(); i < n; ++i) { ir_graph *irg = get_irp_irg(i); const arch_code_generator_if_t *cg_if; be_irg_t birg; + optimization_state_t state; + + /* stop and reset timers */ + if (be_options.timing == BE_TIME_ON) { + LC_STOP_AND_RESET_TIMER(t_prolog); + LC_STOP_AND_RESET_TIMER(t_abi); + LC_STOP_AND_RESET_TIMER(t_codegen); + LC_STOP_AND_RESET_TIMER(t_sched); + LC_STOP_AND_RESET_TIMER(t_constr); + LC_STOP_AND_RESET_TIMER(t_regalloc); + LC_STOP_AND_RESET_TIMER(t_finish); + LC_STOP_AND_RESET_TIMER(t_emit); + LC_STOP_AND_RESET_TIMER(t_verify); + LC_STOP_AND_RESET_TIMER(t_other); + } + BE_TIMER_PUSH(t_other); /* t_other */ + + BE_TIMER_ONLY(num_nodes_b = get_num_reachable_nodes(irg)); birg.irg = irg; birg.main_env = &env; @@ -275,6 +414,11 @@ static void be_main_loop(FILE *file_handle) DBG((env.dbg, LEVEL_2, "====> IRG: %F\n", irg)); dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph); + BE_TIMER_PUSH(t_prolog); + + be_stat_init_irg(env.arch_env, irg); + be_do_stat_nodes(irg, "01 Begin"); + /* set the current graph (this is important for several firm functions) */ current_ir_graph = birg.irg; @@ -282,20 +426,32 @@ static void be_main_loop(FILE *file_handle) cg_if = isa->impl->get_code_generator_if(isa); /* get a code generator for this graph. */ - birg.cg = cg_if->init(file_handle, &birg); + birg.cg = cg_if->init(&birg); /* create the code generator and generate code. */ prepare_graph(&birg); + BE_TIMER_POP(t_prolog); + /* some transformations need to be done before abi introduce */ + BE_TIMER_PUSH(t_codegen); arch_code_generator_before_abi(birg.cg); + BE_TIMER_POP(t_codegen); /* implement the ABI conventions. */ + BE_TIMER_PUSH(t_abi); birg.abi = be_abi_introduce(&birg); + BE_TIMER_POP(t_abi); + dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph); + be_do_stat_nodes(irg, "02 Abi"); /* generate code */ + BE_TIMER_PUSH(t_codegen); arch_code_generator_prepare_graph(birg.cg); + BE_TIMER_POP(t_codegen); + + be_do_stat_nodes(irg, "03 Prepare"); /* * Since the code generator made a lot of new nodes and skipped @@ -308,50 +464,183 @@ static void be_main_loop(FILE *file_handle) /* Compute loop nesting information (for weighting copies) */ construct_cf_backedges(irg); - dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph); + BE_TIMER_ONLY(num_nodes_r = get_num_reachable_nodes(irg)); - /* add Keeps for should_be_different constrained nodes */ - // assure_constraints(&birg); - dump(DUMP_PREPARED, irg, "-assured", dump_ir_block_graph); - - /* Schedule the graphs. */ + /* let backend prepare scheduling */ + BE_TIMER_PUSH(t_codegen); arch_code_generator_before_sched(birg.cg); - list_sched(env.arch_env, irg); + BE_TIMER_POP(t_codegen); + + /* schedule the irg */ + BE_TIMER_PUSH(t_sched); + list_sched(&birg, be_enable_mris); + BE_TIMER_POP(t_sched); - /* connect all stack modifying nodes together (see beabi.c) */ - be_abi_fix_stack_nodes(birg.abi); dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched); - /* Verify the schedule */ - sched_verify_irg(irg); + /* check schedule */ + BE_TIMER_PUSH(t_verify); + be_sched_vrfy(birg.irg, vrfy_option); + BE_TIMER_POP(t_verify); - /* Do register allocation */ + be_do_stat_nodes(irg, "04 Schedule"); + + /* introduce patterns to assure constraints */ + BE_TIMER_PUSH(t_constr); + /* we switch off optimizations here, because they might cause trouble */ + save_optimization_state(&state); + set_optimize(0); + set_opt_normalize(0); + + /* add Keeps for should_be_different constrained nodes */ + /* beware: needs schedule due to usage of be_ssa_constr */ + assure_constraints(&birg); + BE_TIMER_POP(t_constr); + + dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched); + be_do_stat_nodes(irg, "05 Constraints"); + + /* connect all stack modifying nodes together (see beabi.c) */ + BE_TIMER_PUSH(t_abi); + be_abi_fix_stack_nodes(birg.abi, NULL); + BE_TIMER_POP(t_abi); + + dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched); + + /* check schedule */ + BE_TIMER_PUSH(t_verify); + be_sched_vrfy(birg.irg, vrfy_option); + BE_TIMER_POP(t_verify); + + /* do some statistics */ + be_do_stat_reg_pressure(&birg); + + /* stuff needs to be done after scheduling but before register allocation */ + BE_TIMER_PUSH(t_codegen); arch_code_generator_before_ra(birg.cg); - ra->allocate(&birg); + BE_TIMER_POP(t_codegen); + + /* Do register allocation */ + BE_TIMER_ONLY(lc_timer_start(t_regalloc)); + ra_timer = ra->allocate(&birg); + BE_TIMER_ONLY(lc_timer_stop(t_regalloc)); + dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched); + be_do_stat_nodes(irg, "06 Register Allocation"); + /* let the codegenerator prepare the graph for emitter */ + BE_TIMER_PUSH(t_finish); arch_code_generator_after_ra(birg.cg); + BE_TIMER_POP(t_finish); + + /* fix stack offsets */ + BE_TIMER_PUSH(t_abi); be_abi_fix_stack_bias(birg.abi); + BE_TIMER_POP(t_abi); + BE_TIMER_PUSH(t_finish); + arch_code_generator_finish(birg.cg); + BE_TIMER_POP(t_finish); + + dump(DUMP_FINAL, irg, "-finish", dump_ir_block_graph_sched); + + /* check schedule and register allocation */ + BE_TIMER_PUSH(t_verify); + be_sched_vrfy(birg.irg, vrfy_option); + be_verify_register_allocation(env.arch_env, birg.irg); + BE_TIMER_POP(t_verify); + + /* emit assembler code */ + BE_TIMER_PUSH(t_emit); arch_code_generator_done(birg.cg); - dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched); + BE_TIMER_POP(t_emit); + + dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched); + + BE_TIMER_PUSH(t_abi); be_abi_free(birg.abi); + BE_TIMER_POP(t_abi); + + be_do_stat_nodes(irg, "07 Final"); + restore_optimization_state(&state); + + BE_TIMER_ONLY(num_nodes_a = get_num_reachable_nodes(irg)); + BE_TIMER_POP(t_other); + +#define LC_EMIT(timer) printf("%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0) +#define LC_EMIT_RA(timer) printf("\t%-20s: %.3lf msec\n", lc_timer_get_description(timer), (double)lc_timer_elapsed_usec(timer) / 1000.0) + if (be_options.timing == BE_TIME_ON) { + printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg))); + printf("# nodes at begin: %u\n", num_nodes_b); + printf("# nodes before ra: %u\n", num_nodes_r); + printf("# nodes at end: %u\n\n", num_nodes_a); + LC_EMIT(t_prolog); + LC_EMIT(t_abi); + LC_EMIT(t_codegen); + LC_EMIT(t_sched); + LC_EMIT(t_constr); + LC_EMIT(t_regalloc); + LC_EMIT_RA(ra_timer->t_prolog); + LC_EMIT_RA(ra_timer->t_live); + LC_EMIT_RA(ra_timer->t_spill); + LC_EMIT_RA(ra_timer->t_spillslots); + LC_EMIT_RA(ra_timer->t_color); + LC_EMIT_RA(ra_timer->t_ifg); + LC_EMIT_RA(ra_timer->t_copymin); + LC_EMIT_RA(ra_timer->t_ssa); + LC_EMIT_RA(ra_timer->t_epilog); + LC_EMIT_RA(ra_timer->t_verify); + LC_EMIT_RA(ra_timer->t_other); + LC_EMIT(t_finish); + LC_EMIT(t_emit); + LC_EMIT(t_verify); + LC_EMIT(t_other); + } +#undef LC_EMIT + + /* switched off due to statistics (statistic module needs all irgs) */ + if (! stat_is_active()) + free_ir_graph(irg); - free_ir_graph(irg); } - be_done_env(&env); + +#undef BE_TIMER_POP +#undef BE_TIMER_PUSH +#undef BE_TIMER_ONLY } /* Main interface to the frontend. */ void be_main(FILE *file_handle) { +#ifdef WITH_LIBCORE + lc_timer_t *t; + + if (be_options.timing == BE_TIME_ON) { + t = lc_timer_register("bemain", "measure complete bemain loop"); + + if (lc_timer_enter_high_priority()) { + fprintf(stderr, "Warning: Could not enter high priority mode.\n"); + } + + lc_timer_reset_and_start(t); + } +#endif /* WITH_LIBCORE */ + /* never build code for pseudo irgs */ set_visit_pseudo_irgs(0); be_node_init(); be_main_loop(file_handle); + +#ifdef WITH_LIBCORE + if (be_options.timing == BE_TIME_ON) { + lc_timer_stop(t); + lc_timer_leave_high_priority(); + printf("%-20s: %lu msec\n", "BEMAINLOOP", lc_timer_elapsed_msec(t)); + } +#endif /* WITH_LIBCORE */ } /** The debug info retriever function. */