X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbemain.c;h=ebe5281dbd5b2c767f7198eddf0dcbb43d7e5ca2;hb=a12101bc28257435e632b3f128b3ce66b5c1b192;hp=3266f22d4441e6ad212a5390422be3df22b4da38;hpb=aedba58f1f041b80aed30209f7fd4adae13da3c6;p=libfirm

diff --git a/ir/be/bemain.c b/ir/be/bemain.c
index 3266f22d4..ebe5281db 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"
@@ -9,6 +10,11 @@
 
 #include <stdarg.h>
 
+#ifdef WITH_LIBCORE
+#include <libcore/lc_opts.h>
+#include <libcore/lc_opts_enum.h>
+#endif /* WITH_LIBCORE */
+
 #include "obst.h"
 #include "bitset.h"
 
@@ -20,246 +26,457 @@
 #include "irdom_t.h"
 #include "iredges_t.h"
 #include "irloop_t.h"
+#include "irtools.h"
+#include "return.h"
+
+#include "bearch.h"
+#include "firm/bearch_firm.h"
+#include "ia32/bearch_ia32.h"
+#include "arm/bearch_arm.h"
+#include "ppc32/bearch_ppc32.h"
+#include "mips/bearch_mips.h"
 
 #include "be_t.h"
-#include "bechordal_t.h"
 #include "benumb_t.h"
-#include "besched_t.h"
-#include "belistsched.h"
-#include "belive_t.h"
 #include "beutil.h"
-#include "bechordal.h"
-#include "bearch.h"
-#include "becopyoptmain.h"
-#include "becopystat.h"
-#include "bessadestr.h"
-#include "bearch_firm.h"
 #include "benode_t.h"
 #include "beirgmod.h"
+#include "besched_t.h"
+#include "belistsched.h"
+#include "belive_t.h"
 #include "bespillilp.h"
 #include "bespillbelady.h"
+#include "bera.h"
+#include "beraextern.h"
+#include "bechordal_t.h"
+#include "beifg.h"
+#include "beifg_impl.h"
+#include "becopyopt.h"
+#include "becopystat.h"
+#include "bessadestr.h"
+#include "beabi.h"
+#include "belower.h"
+#include "beschedmris.h"
+#include "bestat.h"
+#include "beverify.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)
+
+enum {
+	BE_VRFY_OFF,
+	BE_VRFY_WARN,
+	BE_VRFY_ASSERT
+};
+
+/* options visible for anyone */
+static be_options_t be_options = {
+	/* ilp server */
+	"i44pc52.info.uni-karlsruhe.de",
+
+	/* ilp solver */
+	"cplex"
+};
+
+/* dump flags */
+static unsigned dump_flags = 0;
+
+/* verify options */
+static unsigned 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 },
+	{ "initial",    DUMP_INITIAL },
+	{ "abi",        DUMP_ABI    },
+	{ "sched",      DUMP_SCHED  },
+	{ "prepared",   DUMP_PREPARED },
+	{ "regalloc",   DUMP_RA },
+	{ "final",      DUMP_FINAL },
+	{ "all",        2 * DUMP_FINAL - 1 },
+	{ NULL,         0 }
+};
+
+/* register allocators */
+static const lc_opt_enum_const_ptr_items_t ra_items[] = {
+	{ "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[] = {
+	{ "ia32",    &ia32_isa_if },
+#if 0
+	{ "arm",     &arm_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
+};
+
+static lc_opt_enum_const_ptr_var_t ra_var = {
+	(const void **) &ra, ra_items
+};
+
+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_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),
+
+#ifdef WITH_ILP
+	LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
+	LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
+#endif /* WITH_ILP */
+	{ NULL }
+};
+
+#endif /* WITH_LIBCORE */
+
+void be_opt_register(void)
+{
+#ifdef WITH_LIBCORE
+	int i;
+	lc_opt_entry_t *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);
+		}
 
-#include "beasm_dump_globals.h"
-#include "beasm_asm_gnu.h"
-
-#include "firm2arch.h"
+		/* 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 */
+}
 
-#undef DUMP_BEGIN
-#undef DUMP_PREPARED
-#define DUMP_TRANSFORM
-#define DUMP_SCHED
-#define DUMP_SPILL
-#undef DUMP_ALLOCATED
-#undef DUMP_COPYMIN
-#undef DUMP_SSADESTR
-#undef DUMP_END
+/* 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 */
+}
 
-#define N_PHASES 256
+/** 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_ra_chordal_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)
+static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
 {
-  const arch_isa_if_t *isa = &firm_isa;
-
-  obstack_init(&env->obst);
-  env->dbg = firm_dbg_register("be.main");
-  firm_dbg_set_mask(env->dbg, SET_LEVEL_1);
-
-  env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
-  arch_env_init(env->arch_env, isa);
-  env->arch_env->isa->init();
-
-  env->node_factory = obstack_alloc(&env->obst, sizeof(*env->node_factory));
-  be_node_factory_init(env->node_factory, isa);
-
-  /* Register the irn handler of the architecture */
-  if (isa->irn_handler)
-		arch_env_add_irn_handler(env->arch_env, isa->irn_handler);
-
-  /*
-   * Register the node handler of the back end infrastructure.
-   * This irn handler takes care of the platform independent
-   * spill, reload and perm nodes.
-   */
-  arch_env_add_irn_handler(env->arch_env, be_node_get_irn_handler(env->node_factory));
-
-  return env;
+	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;
+	FIRM_DBG_REGISTER(env->dbg, "be.main");
+
+	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))
+		arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
+
+	/*
+	 * Register the node handler of the back end infrastructure.
+	 * This irn handler takes care of the platform independent
+	 * spill, reload and perm nodes.
+	 */
+	arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
+	env->phi_handler = be_phi_handler_new(env->arch_env);
+	arch_env_push_irn_handler(env->arch_env, env->phi_handler);
+
+	return env;
 }
 
-static be_main_session_env_t *
-be_init_session_env(be_main_session_env_t *env,
-    be_main_env_t *main_env, ir_graph *irg)
+static void be_done_env(be_main_env_t *env)
 {
-  env->main_env = main_env;
-  env->irg = irg;
-
-  return env;
+	env->arch_env->isa->impl->done(env->arch_env->isa);
+	be_phi_handler_free(env->phi_handler);
+	obstack_free(&env->obst, NULL);
 }
 
-static void prepare_graph(be_main_session_env_t *s)
+static void dump(int mask, ir_graph *irg, const char *suffix,
+                 void (*dumper)(ir_graph *, const char *))
 {
-	/* set the current graph (this is important for several firm functions) */
-	current_ir_graph = s->irg;
+	if(dump_flags & mask)
+		be_dump(irg, suffix, dumper);
+}
 
-	/* Let the isa prepare the graph. */
-	s->main_env->arch_env->isa->prepare_graph(s->irg);
+/**
+ * Prepare a backend graph for code generation.
+ */
+static void prepare_graph(be_irg_t *birg)
+{
+	ir_graph *irg = birg->irg;
 
 	/* Normalize proj nodes. */
-	normalize_proj_nodes(s->irg);
+	normalize_proj_nodes(irg);
+
+	/* Make just one return node. */
+	normalize_one_return(irg);
 
 	/* Remove critical edges */
-	remove_critical_cf_edges(s->irg);
+	remove_critical_cf_edges(irg);
 
 	/* Compute the dominance information. */
-	free_dom_and_peace(s->irg);
-	compute_doms(s->irg);
-
-	/* Compute the dominance frontiers */
-	s->dom_front = be_compute_dominance_frontiers(s->irg);
+	free_dom(irg);
+	compute_doms(irg);
 
 	/* Ensure, that the ir_edges are computed. */
-	edges_activate(s->irg);
+	edges_activate(irg);
 
-	/* Compute loop nesting information (for weighting copies) */
-	if (get_irg_loopinfo_state(s->irg) != (loopinfo_valid & loopinfo_cf_consistent))
-		construct_cf_backedges(s->irg);
+	/* check, if the dominance property is fulfilled. */
+	be_check_dominance(irg);
 
-	be_check_dominance(s->irg);
+	/* reset the phi handler. */
+	be_phi_handler_reset(birg->main_env->phi_handler);
 }
 
-static void be_main_loop(void)
+/**
+ * The Firm backend main loop.
+ * Do architecture specific lowering for all graphs
+ * and call the architecture specific code generator.
+ */
+static void be_main_loop(FILE *file_handle)
 {
 	int i, n;
+	arch_isa_t *isa;
 	be_main_env_t env;
-	const arch_isa_if_t *isa;
 
-	be_init_env(&env);
+	be_init_env(&env, file_handle);
+
 	isa = arch_env_get_isa(env.arch_env);
 
-        /* create required irop's */
-        create_bearch_asm_opcodes();
+	// /* for debugging, anchors helps */
+	// dump_all_anchors(1);
 
 	/* 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);
-		be_main_session_env_t session;
+		const arch_code_generator_if_t *cg_if;
+		be_irg_t birg;
+		int save_optimize, save_normalize;
+
+		birg.irg      = irg;
+		birg.main_env = &env;
 
 		DBG((env.dbg, LEVEL_2, "====> IRG: %F\n", irg));
-#ifdef DUMP_BEGIN
-		dump_ir_block_graph(irg, "-begin");
-#endif
+		dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
 
-		/* Init the session. */
-		be_init_session_env(&session, &env, irg);
+		be_stat_init_irg(env.arch_env, irg);
+		be_do_stat_nodes(irg, "01 Begin");
 
-		/* Compute some analyses and prepare the graph for backend use. */
-		prepare_graph(&session);
+		/* set the current graph (this is important for several firm functions) */
+		current_ir_graph = birg.irg;
 
-                transform_firm(irg);
+		/* Get the code generator interface. */
+		cg_if = isa->impl->get_code_generator_if(isa);
 
-#ifdef DUMP_TRANSFORM
-		dump_ir_block_graph(irg, "-transformed");
-#endif
+		/* get a code generator for this graph. */
+		birg.cg = cg_if->init(&birg);
 
+		/* create the code generator and generate code. */
+		prepare_graph(&birg);
 
-#if 0
-#ifdef DUMP_PREPARED
-		dump_dominator_information(true);
-		dump_ir_block_graph(irg, "-prepared");
-		dump_dominator_information(false);
-#endif
+		/* some transformations need to be done before abi introduce */
+		arch_code_generator_before_abi(birg.cg);
+
+		/* implement the ABI conventions. */
+		birg.abi = be_abi_introduce(&birg);
+		dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
+
+		be_do_stat_nodes(irg, "02 Abi");
+
+		/* generate code */
+		arch_code_generator_prepare_graph(birg.cg);
+
+		be_do_stat_nodes(irg, "03 Prepare");
+
+		/*
+		 * Since the code generator made a lot of new nodes and skipped
+		 * a lot of old ones, we should do dead node elimination here.
+		 * Note that this requires disabling the edges here.
+		 */
+		edges_deactivate(irg);
+		//dead_node_elimination(irg);
+		edges_activate(irg);
+
+		/* Compute loop nesting information (for weighting copies) */
+		construct_cf_backedges(irg);
+
+		dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
 
 		/* Schedule the graphs. */
-		list_sched(irg, trivial_selector);
-		be_sched_imm(irg);
+		arch_code_generator_before_sched(birg.cg);
+		list_sched(&birg, be_enable_mris);
+		dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
 
-#ifdef DUMP_SCHED
-		dump_ir_block_graph_sched(irg, "-sched");
-#endif
+		/* check schedule */
+		be_sched_vrfy(birg.irg, vrfy_option);
 
-		/* Verify the schedule */
-		sched_verify_irg(irg);
+		be_do_stat_nodes(irg, "04 Schedule");
 
-		/* Build liveness information */
-		be_liveness(irg);
+		/* we switch off optimizations here, because they might cause trouble */
+		save_optimize  = get_optimize();
+		save_normalize = get_opt_normalize();
+		set_optimize(0);
+		set_opt_normalize(0);
 
-		/* Perform the following for each register class. */
-		for(j = 0, m = isa->get_n_reg_class(); j < m; ++j) {
-			be_chordal_env_t *chordal_env;
-			const arch_register_class_t *cls = isa->get_reg_class(j);
-			DBG((env.dbg, LEVEL_1, "----> Reg class: %s\n", cls->name));
+		/* add Keeps for should_be_different constrained nodes  */
+		/* beware: needs schedule due to usage of be_ssa_constr */
+		assure_constraints(&birg);
+		dump(DUMP_SCHED, irg, "-assured", dump_ir_block_graph_sched);
 
-			/* spilling */
-			//be_spill_ilp(&session, cls);
-			be_spill_belady(&session, cls);
-#ifdef DUMP_SPILL
-			dump_ir_block_graph_sched(session.irg, "-spill");
-#endif
-			be_liveness(irg);
-			be_numbering(irg);
-			be_check_pressure(&session, cls);
+		be_do_stat_nodes(irg, "05 Constraints");
 
-#if 0
-			{
-				FILE *f;
-				char buf[128];
-				ir_snprintf(buf, sizeof(buf), "%F_%s-live.txt", irg, cls->name);
-				if((f = fopen(buf, "wt")) != NULL) {
-					be_liveness_dump(session.irg, f);
-					fclose(f);
-				}
-			}
-#endif
+		/* connect all stack modifying nodes together (see beabi.c) */
+		be_abi_fix_stack_nodes(birg.abi);
+		dump(DUMP_SCHED, irg, "-fix_stack", dump_ir_block_graph_sched);
 
-			/* allocation */
-			chordal_env = be_ra_chordal(&session, cls);
-#ifdef DUMP_ALLOCATED
-			dump_allocated_irg(env.arch_env, irg, "");
-#endif
+		/* check schedule */
+		be_sched_vrfy(birg.irg, vrfy_option);
 
-			/* copy minimization */
-			copystat_collect_cls(chordal_env);
-			be_copy_opt(chordal_env);
-#ifdef DUMP_COPYMIN
-			dump_allocated_irg(env.arch_env, irg, "-copymin");
-#endif
+		/* do some statistics */
+		be_do_stat_reg_pressure(&birg);
 
-			/* ssa destruction */
-			be_ssa_destruction(chordal_env);
-			be_ssa_destruction_check(chordal_env);
-			be_ra_chordal_check(chordal_env);
-#ifdef DUMP_SSADESTR
-			dump_allocated_irg(env.arch_env, irg, "-ssadestr");
-#endif
+		/* Do register allocation */
+		arch_code_generator_before_ra(birg.cg);
+		ra->allocate(&birg);
+		dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
 
-			be_ra_chordal_done(chordal_env);
-			be_numbering_done(irg);
-		}
-#ifdef DUMP_END
-		dump_ir_block_graph_sched(session.irg, "-end");
-#endif
-		copystat_dump(irg);
-#endif /* if 0 */
+		be_do_stat_nodes(irg, "06 Register Allocation");
+
+		arch_code_generator_after_ra(birg.cg);
+		be_abi_fix_stack_bias(birg.abi);
+
+		/* check schedule */
+		be_sched_vrfy(birg.irg, vrfy_option);
+
+		arch_code_generator_done(birg.cg);
+		dump(DUMP_FINAL, irg, "-end", dump_ir_extblock_graph_sched);
+		be_abi_free(birg.abi);
+
+		be_do_stat_nodes(irg, "07 Final");
+
+		/* reset the optimizations */
+		set_optimize(save_optimize);
+		set_opt_normalize(save_normalize);
+
+		/* switched off due to statistics (statistic module needs all irgs) */
+		//		free_ir_graph(irg);
 	}
+	be_done_env(&env);
 }
 
-void be_main(int argc, const char *argv[])
+/* Main interface to the frontend. */
+void be_main(FILE *file_handle)
 {
-  FILE *asm_output_file;
+	/* never build code for pseudo irgs */
+	set_visit_pseudo_irgs(0);
 
-  be_main_loop();
+	be_node_init();
+	be_main_loop(file_handle);
+}
+
+/** The debug info retriever function. */
+static retrieve_dbg_func retrieve_dbg = NULL;
+
+/* Sets a debug info retriever. */
+void be_set_debug_retrieve(retrieve_dbg_func func) {
+	retrieve_dbg = func;
+}
 
-  asm_output_file = fopen(argv[0], "w");
-  firmbe_gen_code(asm_output_file);
-  fclose(asm_output_file);
+/* Retrieve the debug info. */
+const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
+	if (retrieve_dbg)
+		return retrieve_dbg(dbg, line);
+	*line = 0;
+	return NULL;
 }