+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
/**
- * Backend driver.
- * @author Sebastian Hack
- * @date 25.11.2004
+ * @file
+ * @brief Main Backend driver.
+ * @author Sebastian Hack
+ * @date 25.11.2004
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
+#include <stdio.h>
-#ifdef WITH_LIBCORE
-#include <libcore/lc_opts.h>
-#include <libcore/lc_opts_enum.h>
-#endif /* WITH_LIBCORE */
+#include "lc_opts.h"
+#include "lc_opts_enum.h"
#include "obst.h"
#include "bitset.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 "irvrfy.h"
+#include "irprintf.h"
+#include "iroptimize.h"
+#include "firmstat.h"
+#include "execfreq.h"
+#include "irprofile.h"
+
+#include "bearch_t.h"
#include "be_t.h"
-#include "benumb_t.h"
+#include "bemodule.h"
#include "beutil.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 "bessadestr.h"
#include "beabi.h"
#include "belower.h"
+#include "beschedmris.h"
+#include "bestat.h"
+#include "beverify.h"
+#include "be_dbgout.h"
+#include "beirg_t.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)
+#define NEW_ID(s) new_id_from_chars(s, sizeof(s) - 1)
+
+#ifdef WITH_ILP
+#include "beilpsched.h"
+#endif /* WITH_ILP */
/* options visible for anyone */
static be_options_t be_options = {
- /* ilp server */
- "i44pc52.info.uni-karlsruhe.de",
-
- /* ilp solver */
- "cplex"
+ DUMP_NONE, /* dump flags */
+ BE_TIME_OFF, /* no timing */
+ 0, /* no opt profile */
+ 0, /* try to omit frame pointer */
+ 0, /* try to omit leaf frame pointer */
+ 0, /* create PIC code */
+ 0, /* create gprof compatible profiling code */
+ BE_VRFY_WARN, /* verification level: warn */
+ BE_SCHED_LIST, /* scheduler: list scheduler */
+ "linux", /* target OS name */
+ "i44pc52.info.uni-karlsruhe.de", /* ilp server */
+ "cplex", /* ilp solver */
+ 0, /* enable statistic event dumping */
+ "", /* print stat events */
};
-/* dump flags */
-static unsigned dump_flags = 2 * DUMP_FINAL - 1;
-
-/* register allocator to use. */
-static const be_ra_t *ra = &be_ra_chordal_allocator;
+/* config file. */
+static char config_file[256] = { 0 };
/* back end instruction set architecture to use */
-static const arch_isa_if_t *isa_if = &ia32_isa_if;
-#ifdef WITH_LIBCORE
-
-static lc_opt_entry_t *be_grp_root = NULL;
+static const arch_isa_if_t *isa_if = 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 },
- { "external", &be_ra_external_allocator },
- { 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 }
};
-/* instruction set architectures. */
-static const lc_opt_enum_const_ptr_items_t isa_items[] = {
- { "firm", &firm_isa },
- { "ia32", &ia32_isa_if },
- { "arm", &arm_isa_if },
- { "ppc32", &ppc32_isa_if },
- { "mips", &mips_isa_if },
- { NULL, NULL }
+/* scheduling options. */
+static const lc_opt_enum_int_items_t sched_items[] = {
+ { "list", BE_SCHED_LIST },
+#ifdef WITH_ILP
+ { "ilp", BE_SCHED_ILP },
+#endif /* WITH_ILP */
+ { NULL, 0 }
};
static lc_opt_enum_mask_var_t dump_var = {
- &dump_flags, dump_items
+ &be_options.dump_flags, dump_items
};
-static lc_opt_enum_const_ptr_var_t ra_var = {
- (const void **) &ra, ra_items
+static lc_opt_enum_int_var_t vrfy_var = {
+ &be_options.vrfy_option, vrfy_items
};
-static lc_opt_enum_const_ptr_var_t isa_var = {
- (const void **) &isa_if, isa_items
+static lc_opt_enum_int_var_t sched_var = {
+ &be_options.scheduler, sched_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_STR ("config", "read another config file containing backend options", config_file, sizeof(config_file)),
+ LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
+ LC_OPT_ENT_BOOL ("omitfp", "omit frame pointer", &be_options.omit_fp),
+ LC_OPT_ENT_BOOL ("omitleaffp", "omit frame pointer in leaf routines", &be_options.omit_leaf_fp),
+ LC_OPT_ENT_BOOL ("pic", "create PIC code", &be_options.pic),
+ LC_OPT_ENT_BOOL ("gprof", "create gprof profiling code", &be_options.gprof),
+ LC_OPT_ENT_ENUM_PTR ("vrfy", "verify the backend irg", &vrfy_var),
+ LC_OPT_ENT_BOOL ("time", "get backend timing statistics", &be_options.timing),
+ LC_OPT_ENT_BOOL ("profile", "instrument the code for execution count profiling", &be_options.opt_profile),
+ LC_OPT_ENT_ENUM_PTR ("sched", "select a scheduler", &sched_var),
+ LC_OPT_ENT_STR ("os", "specify target operating system", &be_options.target_os, sizeof(be_options.target_os)),
+#ifdef FIRM_STATISTICS
+ LC_OPT_ENT_BOOL ("statev", "dump statistic events", &be_options.statev),
+ LC_OPT_ENT_STR ("filtev", "filter for stat events (regex if support is active", &be_options.filtev, sizeof(be_options.filtev)),
+#endif
#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 }
+ LC_OPT_LAST
};
-#endif /* WITH_LIBCORE */
+static be_module_list_entry_t *isa_ifs = NULL;
+
+
+unsigned short asm_constraint_flags[256];
+
+void be_init_default_asm_constraint_flags(void)
+{
+ asm_constraint_flags['?'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['&'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
+ | ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER;
+ asm_constraint_flags['%'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT
+ | ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE;
+ asm_constraint_flags['!'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+
+ asm_constraint_flags['='] = ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
+ | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ;
+ asm_constraint_flags['+'] = ASM_CONSTRAINT_FLAG_MODIFIER_READ
+ | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE;
+
+ asm_constraint_flags['i'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['s'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['E'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['F'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['G'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['H'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['I'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['J'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['K'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['L'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['M'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['N'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['O'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+ asm_constraint_flags['P'] = ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+
+ asm_constraint_flags['m'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
+ asm_constraint_flags['o'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
+ asm_constraint_flags['V'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
+ asm_constraint_flags['<'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
+ asm_constraint_flags['>'] = ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP;
+
+ asm_constraint_flags['p'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['0'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['1'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['2'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['3'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['4'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['5'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['6'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['7'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['8'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+ asm_constraint_flags['9'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER;
+
+ asm_constraint_flags['X'] = ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER
+ | ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP
+ | ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE;
+
+ /* these should have been catched by the parsing code already */
+ asm_constraint_flags['#'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['*'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags[' '] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['\t'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['\n'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+ asm_constraint_flags['\r'] = ASM_CONSTRAINT_FLAG_NO_SUPPORT;
+}
+
+asm_constraint_flags_t be_parse_asm_constraints(const char *constraint)
+{
+ asm_constraint_flags_t flags = 0;
+ const char *c;
+ asm_constraint_flags_t tflags;
+
+ for (c = constraint; *c != '\0'; ++c) {
+ switch (*c) {
+ case '#':
+ /* 'comment' stuff */
+ while(*c != 0 && *c != ',')
+ ++c;
+ break;
+ case '*':
+ /* 'comment' character */
+ ++c;
+ break;
+ case ' ':
+ case '\t':
+ case '\n':
+ case '\r':
+ break;
+ default:
+ tflags = asm_constraint_flags[(int) *c];
+ if (tflags != 0) {
+ flags |= tflags;
+ } else {
+ flags |= isa_if->parse_asm_constraint(isa_if, &c);
+ }
+ break;
+ }
+ }
+
+ if ( ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)
+ && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE))
+ || ((flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ
+ && (flags & ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ)))) {
+ flags |= ASM_CONSTRAINT_FLAG_INVALID;
+ }
+ if (! (flags & (ASM_CONSTRAINT_FLAG_MODIFIER_READ
+ | ASM_CONSTRAINT_FLAG_MODIFIER_WRITE
+ | ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE
+ | ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ))) {
+ flags |= ASM_CONSTRAINT_FLAG_MODIFIER_READ;
+ }
+
+ return flags;
+}
+
+bool be_is_valid_clobber(const char *clobber)
+{
+ /* memory is a valid clobber. (the frontend has to detect this case too,
+ * because it has to add memory edges to the asm) */
+ if (strcmp(clobber, "memory") == 0)
+ return true;
+ /* cc (condition code) is always valid */
+ if (strcmp(clobber, "cc") == 0)
+ return true;
+
+ return isa_if->is_valid_clobber(isa_if, clobber);
+}
+
+void be_register_isa_if(const char *name, const arch_isa_if_t *isa)
+{
+ if (isa_if == NULL)
+ isa_if = isa;
+
+ be_add_module_to_list(&isa_ifs, name, (void*) isa);
+}
void be_opt_register(void)
{
-#ifdef WITH_LIBCORE
- int i;
- lc_opt_entry_t *be_grp_ra;
+ lc_opt_entry_t *be_grp;
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");
+ if (run_once) {
+ return;
+ }
+ run_once = 1;
- lc_opt_add_table(be_grp_root, be_main_options);
+ be_init_modules();
- /* 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);
- }
+ be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
+ lc_opt_add_table(be_grp, be_main_options);
- /* 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 */
+ be_add_module_list_opt(be_grp, "isa", "the instruction set architecture",
+ &isa_ifs, (void**) &isa_if);
}
/* Parse one argument. */
int be_parse_arg(const char *arg) {
-#ifdef WITH_LIBCORE
- return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
-#endif /* WITH_LIBCORE */
+ lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
+ if (strcmp(arg, "help") == 0 || (arg[0] == '?' && arg[1] == '\0')) {
+ lc_opt_print_help(be_grp, stdout);
+ return -1;
+ }
+ return lc_opt_from_single_arg(be_grp, NULL, arg, NULL);
}
+/** The be parameters returned by default, all off. */
+static const backend_params be_params = {
+ 0, /* need dword lowering */
+ 0, /* don't support inline assembler yet */
+ 0, /* no immediate floating point mode. */
+ NULL, /* no additional opcodes */
+ NULL, /* will be set later */
+ NULL, /* but yet no creator function */
+ NULL, /* context for create_intrinsic_fkt */
+ NULL, /* no if conversion settings */
+ NULL /* no immediate fp mode */
+};
-void be_init(void)
+/* Perform schedule verification if requested. */
+static void be_sched_vrfy(be_irg_t *birg, int vrfy_opt) {
+ if (vrfy_opt == BE_VRFY_WARN) {
+ be_verify_schedule(birg);
+ } else if (vrfy_opt == BE_VRFY_ASSERT) {
+ assert(be_verify_schedule(birg) && "Schedule verification failed.");
+ }
+}
+
+/* Initialize the Firm backend. Must be run first in init_firm()! */
+void firm_be_init(void)
{
be_opt_register();
+ be_init_modules();
+}
+
+/* Finalize the Firm backend. */
+void firm_be_finish(void)
+{
+ be_quit_modules();
+}
- be_sched_init();
- be_liveness_init();
- be_numbering_init();
- be_copy_opt_init();
- copystat_init();
- phi_class_init();
+/* Returns the backend parameter */
+const backend_params *be_get_backend_param(void)
+{
+ if (isa_if->get_params)
+ return isa_if->get_params();
+ return &be_params;
}
+/**
+ * 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;
- FIRM_DBG_REGISTER(env->dbg, "be.main");
+ env->options = &be_options;
+ env->ent_trampoline_map = pmap_create();
+ env->pic_trampolines_type = new_type_class(NEW_ID("$PIC_TRAMPOLINE_TYPE"));
+ env->ent_pic_symbol_map = pmap_create();
+ env->pic_symbols_type = new_type_struct(NEW_ID("$PIC_SYMBOLS_TYPE"));
- arch_env_init(env->arch_env, isa_if, file_handle);
+ remove_irp_type(env->pic_trampolines_type);
+ remove_irp_type(env->pic_symbols_type);
+ set_class_final(env->pic_trampolines_type, 1);
- /* 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));
+ memset(asm_constraint_flags, 0, sizeof(asm_constraint_flags));
+ env->arch_env = arch_env_init(isa_if, file_handle, env);
- /*
- * 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);
+ be_phi_handler_new(env);
+ be_dbg_open();
return env;
}
+/**
+ * Called when the be_main_env_t can be destroyed.
+ */
static void be_done_env(be_main_env_t *env)
{
- env->arch_env->isa->impl->done(env->arch_env->isa);
- be_phi_handler_free(env->phi_handler);
- obstack_free(&env->obst, NULL);
+ arch_env_done(env->arch_env);
+ be_dbg_close();
+ be_phi_handler_free();
+
+ pmap_destroy(env->ent_trampoline_map);
+ pmap_destroy(env->ent_pic_symbol_map);
+ free_type(env->pic_trampolines_type);
+ free_type(env->pic_symbols_type);
}
+/**
+ * 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 *))
{
- if(dump_flags & mask)
+ if(be_options.dump_flags & mask)
be_dump(irg, suffix, dumper);
}
/**
- * Prepare a backend graph for code generation.
+ * Prepare a backend graph for code generation and initialize its birg
*/
-static void prepare_graph(be_irg_t *birg)
+static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
{
- ir_graph *irg = birg->irg;
+ memset(birg, 0, sizeof(*birg));
+ birg->irg = irg;
+ birg->main_env = env;
+
+ edges_deactivate_kind(irg, EDGE_KIND_DEP);
+ edges_activate_kind(irg, EDGE_KIND_DEP);
+
+ dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
+
+ 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 = irg;
/* Normalize proj nodes. */
normalize_proj_nodes(irg);
- /* Make just one return node. */
- normalize_one_return(irg);
+ /* we do this before critical edge split. As this produces less returns,
+ because sometimes (= 164.gzip) multiple returns are slower */
+ normalize_n_returns(irg);
/* Remove critical edges */
- remove_critical_cf_edges(irg);
-
- /* Compute the dominance information. */
- free_dom(irg);
- compute_doms(irg);
+ remove_critical_cf_edges_ex(irg, /*ignore_exception_edges=*/0);
/* Ensure, that the ir_edges are computed. */
- edges_activate(irg);
+ edges_assure(irg);
- /* check, if the dominance property is fulfilled. */
- be_check_dominance(irg);
+ set_irg_phase_state(irg, phase_backend);
- /* reset the phi handler. */
- be_phi_handler_reset(birg->main_env->phi_handler);
+ dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
}
+#define BE_TIMER_ONLY(code) do { if (be_timing) { code; } } while(0)
+
+int be_timing;
+ir_timer_t *t_abi;
+ir_timer_t *t_codegen;
+ir_timer_t *t_sched;
+ir_timer_t *t_constr;
+ir_timer_t *t_finish;
+ir_timer_t *t_emit;
+ir_timer_t *t_other;
+ir_timer_t *t_verify;
+ir_timer_t *t_heights;
+ir_timer_t *t_live;
+ir_timer_t *t_execfreq;
+ir_timer_t *t_ssa_constr;
+ir_timer_t *t_ra_constr;
+ir_timer_t *t_ra_prolog;
+ir_timer_t *t_ra_epilog;
+ir_timer_t *t_ra_spill;
+ir_timer_t *t_ra_spill_apply;
+ir_timer_t *t_ra_color;
+ir_timer_t *t_ra_ifg;
+ir_timer_t *t_ra_copymin;
+ir_timer_t *t_ra_ssa;
+ir_timer_t *t_ra_other;
+
/**
* 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
+ * @param cup_name name of the compilation unit
*/
-static void be_main_loop(FILE *file_handle)
+static void be_main_loop(FILE *file_handle, const char *cup_name)
{
- int i, n;
- arch_isa_t *isa;
+ int i;
be_main_env_t env;
+ char prof_filename[256];
+ static const char suffix[] = ".prof";
+ be_irg_t *birgs;
+ int num_birgs;
+ ir_graph **irg_list, **backend_irg_list;
+ arch_env_t *arch_env;
+
+ be_timing = (be_options.timing == BE_TIME_ON);
+
+ if (be_timing) {
+ t_abi = ir_timer_register("time_beabi", "be abi introduction");
+ t_codegen = ir_timer_register("time_codegen", "codegeneration");
+ t_sched = ir_timer_register("time_sched", "scheduling");
+ t_constr = ir_timer_register("time_constr", "assure constraints");
+ t_finish = ir_timer_register("time_finish", "graph finish");
+ t_emit = ir_timer_register("time_emiter", "code emiter");
+ t_verify = ir_timer_register("time_verify", "graph verification");
+ t_other = ir_timer_register("time_other", "other");
+ t_heights = ir_timer_register("time_heights", "heights");
+ t_live = ir_timer_register("time_liveness", "be liveness");
+ t_execfreq = ir_timer_register("time_execfreq", "execfreq");
+ t_ssa_constr = ir_timer_register("time_ssa_constr", "ssa reconstruction");
+ t_ra_prolog = ir_timer_register("time_ra_prolog", "regalloc prolog");
+ t_ra_epilog = ir_timer_register("time_ra_epilog", "regalloc epilog");
+ t_ra_constr = ir_timer_register("time_ra_constr", "regalloc constraints");
+ t_ra_spill = ir_timer_register("time_ra_spill", "spiller");
+ t_ra_spill_apply
+ = ir_timer_register("time_ra_spill_apply", "apply spills");
+ t_ra_color = ir_timer_register("time_ra_color", "graph coloring");
+ t_ra_ifg = ir_timer_register("time_ra_ifg", "interference graph");
+ t_ra_copymin = ir_timer_register("time_ra_copymin", "copy minimization");
+ t_ra_ssa = ir_timer_register("time_ra_ssadestr", "ssa destruction");
+ t_ra_other = ir_timer_register("time_ra_other", "regalloc other");
+ }
be_init_env(&env, file_handle);
+ env.cup_name = cup_name;
+
+ be_dbg_so(cup_name);
+ be_dbg_types();
+
+ arch_env = env.arch_env;
- isa = arch_env_get_isa(env.arch_env);
+ /* backend may provide an ordered list of irgs where code should be generated for */
+ irg_list = NEW_ARR_F(ir_graph *, 0);
+ backend_irg_list = arch_env_get_backend_irg_list(arch_env, &irg_list);
+
+ /* we might need 1 birg more for instrumentation constructor */
+ num_birgs = backend_irg_list ? ARR_LEN(backend_irg_list) : get_irp_n_irgs();
+ birgs = alloca(sizeof(birgs[0]) * (num_birgs + 1));
+
+ /* First: initialize all birgs */
+ for(i = 0; i < num_birgs; ++i) {
+ ir_graph *irg = backend_irg_list ? backend_irg_list[i] : get_irp_irg(i);
+ initialize_birg(&birgs[i], irg, &env);
+ }
+ DEL_ARR_F(irg_list);
+
+ /*
+ Get the filename for the profiling data.
+ Beware: '\0' is already included in sizeof(suffix)
+ */
+ memset(prof_filename, 0, sizeof(prof_filename));
+ strncpy(prof_filename, cup_name, sizeof(prof_filename) - sizeof(suffix));
+ strcat(prof_filename, suffix);
+
+ /*
+ Next: Either instruments all irgs with profiling code
+ or try to read in profile data for current translation unit.
+ */
+ if (be_options.opt_profile) {
+ ir_graph *prof_init_irg = ir_profile_instrument(prof_filename, profile_default);
+ initialize_birg(&birgs[num_birgs], prof_init_irg, &env);
+ num_birgs++;
+ } else {
+ ir_profile_read(prof_filename);
+ }
/* For all graphs */
- for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
- ir_graph *irg = get_irp_irg(i);
+ for (i = 0; i < num_birgs; ++i) {
+ be_irg_t *birg = &birgs[i];
+ ir_graph *irg = birg->irg;
+ optimization_state_t state;
const arch_code_generator_if_t *cg_if;
- be_irg_t birg;
- birg.irg = irg;
- birg.main_env = &env;
+ /* set the current graph (this is important for several firm functions) */
+ current_ir_graph = irg;
- DBG((env.dbg, LEVEL_2, "====> IRG: %F\n", irg));
- dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
+#if 0
+ {
+ unsigned percent = 100*i/num_birgs;
+ ir_printf("%u.%02u %+F\n", percent/100, percent%100, irg);
+ }
+#endif
+ be_sched_init_phase(irg);
- /* set the current graph (this is important for several firm functions) */
- current_ir_graph = birg.irg;
+ /* reset the phi handler. */
+ be_phi_handler_reset();
+
+ stat_ev_ctx_push_fobj("bemain_irg", irg);
+
+ /* stop and reset timers */
+ BE_TIMER_PUSH(t_other); /* t_other */
+
+ /* Verify the initial graph */
+ BE_TIMER_PUSH(t_verify);
+ if (be_options.vrfy_option == BE_VRFY_WARN) {
+ irg_verify(irg, VRFY_ENFORCE_SSA);
+ be_check_dominance(irg);
+ } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
+ assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
+ assert(be_check_dominance(irg) && "Dominance verification failed");
+ }
+ BE_TIMER_POP(t_verify);
/* Get the code generator interface. */
- cg_if = isa->impl->get_code_generator_if(isa);
+ cg_if = arch_env_get_code_generator_if(arch_env);
/* get a code generator for this graph. */
- birg.cg = cg_if->init(&birg);
-
- /* create the code generator and generate code. */
- prepare_graph(&birg);
+ birg->cg = cg_if->init(birg);
/* some transformations need to be done before abi introduce */
- arch_code_generator_before_abi(birg.cg);
+ arch_code_generator_before_abi(birg->cg);
/* implement the ABI conventions. */
- birg.abi = be_abi_introduce(&birg);
+ 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");
+
+ if (be_options.vrfy_option == BE_VRFY_WARN) {
+ be_check_dominance(irg);
+ be_verify_out_edges(irg);
+ } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
+ assert(be_verify_out_edges(irg));
+ assert(be_check_dominance(irg) && "Dominance verification failed");
+ }
/* generate code */
- arch_code_generator_prepare_graph(birg.cg);
+ stat_ev_ctx_push_str("bemain_phase", "prepare");
+ BE_TIMER_PUSH(t_codegen);
+ arch_code_generator_prepare_graph(birg->cg);
+ BE_TIMER_POP(t_codegen);
+ stat_ev_ctx_pop("bemain_phase");
- /*
- * 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);
+ /* reset the phi handler. */
+ be_phi_handler_reset();
- /* Compute loop nesting information (for weighting copies) */
- construct_cf_backedges(irg);
+ be_do_stat_nodes(irg, "03 Prepare");
dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
- /* add Keeps for should_be_different constrained nodes */
- assure_constraints(&birg);
- dump(DUMP_PREPARED, irg, "-assured", dump_ir_block_graph);
+ if (be_options.vrfy_option == BE_VRFY_WARN) {
+ be_check_dominance(irg);
+ be_verify_out_edges(irg);
+ } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
+ assert(be_verify_out_edges(irg));
+ assert(be_check_dominance(irg) && "Dominance verification failed");
+ }
- /* Schedule the graphs. */
- arch_code_generator_before_sched(birg.cg);
- list_sched(env.arch_env, irg);
+ BE_TIMER_PUSH(t_execfreq);
+ /**
+ * Create execution frequencies from profile data or estimate some
+ */
+ if (ir_profile_has_data())
+ birg->exec_freq = ir_create_execfreqs_from_profile(irg);
+ else
+ birg->exec_freq = compute_execfreq(irg, 10);
+ BE_TIMER_POP(t_execfreq);
+
+
+ /* disabled for now, fails for EmptyFor.c and XXEndless.c */
+ /* be_live_chk_compare(birg); */
+
+ /* let backend prepare scheduling */
+ stat_ev_ctx_push_str("bemain_phase", "before_sched");
+ BE_TIMER_PUSH(t_codegen);
+ arch_code_generator_before_sched(birg->cg);
+ BE_TIMER_POP(t_codegen);
+ stat_ev_ctx_pop("bemain_phase");
+
+ /* schedule the irg */
+ BE_TIMER_PUSH(t_sched);
+ switch (be_options.scheduler) {
+ default:
+ fprintf(stderr, "Warning: invalid scheduler (%d) selected, falling back to list scheduler.\n", be_options.scheduler);
+ case BE_SCHED_LIST:
+ list_sched(birg, &be_options);
+ break;
+#ifdef WITH_ILP
+ case BE_SCHED_ILP:
+ be_ilp_sched(birg, &be_options);
+ break;
+#endif /* WITH_ILP */
+ };
+ 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, be_options.vrfy_option);
+ BE_TIMER_POP(t_verify);
+
+ 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);
+ set_opt_cse(0);
+
+ assert(!get_opt_cse());
+
+ /* 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");
+
+ /* stuff needs to be done after scheduling but before register allocation */
+ BE_TIMER_PUSH(t_codegen);
+ arch_code_generator_before_ra(birg->cg);
+ BE_TIMER_POP(t_codegen);
+
+ /* connect all stack modifying nodes together (see beabi.c) */
+ BE_TIMER_PUSH(t_abi);
+ be_abi_fix_stack_nodes(birg->abi);
+ 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, be_options.vrfy_option);
+ BE_TIMER_POP(t_verify);
+
+ /* do some statistics */
+ //be_do_stat_reg_pressure(birg);
+
+#ifdef FIRM_STATISTICS
+ stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
+#endif
/* Do register allocation */
- arch_code_generator_before_ra(birg.cg);
- ra->allocate(&birg);
+ be_allocate_registers(birg);
+
+#ifdef FIRM_STATISTICS
+ stat_ev_dbl("costs_before_ra", be_estimate_irg_costs(irg, arch_env, birg->exec_freq));
+#endif
+
dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
+ be_do_stat_nodes(irg, "06 Register Allocation");
+
+ /* let the code generator 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_nodes(birg->abi);
+ be_remove_dead_nodes_from_schedule(birg);
+ be_abi_fix_stack_bias(birg->abi);
+ BE_TIMER_POP(t_abi);
+
+ dump(DUMP_SCHED, irg, "-fix_stack_after_ra", dump_ir_block_graph_sched);
+
+ 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);
+ if (be_options.vrfy_option == BE_VRFY_WARN) {
+ irg_verify(irg, VRFY_ENFORCE_SSA);
+ be_check_dominance(irg);
+ be_verify_out_edges(irg);
+ be_verify_schedule(birg);
+ be_verify_register_allocation(birg);
+ } else if (be_options.vrfy_option == BE_VRFY_ASSERT) {
+ assert(irg_verify(irg, VRFY_ENFORCE_SSA) && "irg verification failed");
+ assert(be_verify_out_edges(irg) && "out edge verification failed");
+ assert(be_check_dominance(irg) && "Dominance verification failed");
+ assert(be_verify_schedule(birg) && "Schedule verification failed");
+ assert(be_verify_register_allocation(birg)
+ && "register allocation verification failed");
- arch_code_generator_after_ra(birg.cg);
- be_abi_fix_stack_bias(birg.abi);
+ }
+ BE_TIMER_POP(t_verify);
+
+ /* emit assembler code */
+ BE_TIMER_PUSH(t_emit);
+ arch_code_generator_done(birg->cg);
+ BE_TIMER_POP(t_emit);
- arch_code_generator_done(birg.cg);
dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
- be_abi_free(birg.abi);
-// free_ir_graph(irg);
+ 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_POP(t_other);
+
+#define STOP_AND_RESET_TIMER(timer) do { ir_timer_stop(timer); ir_timer_reset(timer); } while(0)
+
+#define LC_EMIT(timer) \
+ stat_ev_if { \
+ stat_ev_dbl(ir_timer_get_name(timer), ir_timer_elapsed_msec(timer)); \
+ } else { \
+ printf("%-20s: %8.3lf msec\n", ir_timer_get_description(timer), (double)ir_timer_elapsed_usec(timer) / 1000.0); \
+ } \
+ STOP_AND_RESET_TIMER(timer);
+
+ BE_TIMER_ONLY(
+ stat_ev_if {
+ } else {
+ printf("==>> IRG %s <<==\n", get_entity_name(get_irg_entity(irg)));
+ }
+ LC_EMIT(t_abi);
+ LC_EMIT(t_codegen);
+ LC_EMIT(t_sched);
+ LC_EMIT(t_live);
+ LC_EMIT(t_heights);
+ LC_EMIT(t_ssa_constr);
+ LC_EMIT(t_constr);
+ LC_EMIT(t_execfreq);
+ LC_EMIT(t_ra_prolog);
+ LC_EMIT(t_ra_spill);
+ LC_EMIT(t_ra_spill_apply);
+ LC_EMIT(t_ra_constr);
+ LC_EMIT(t_ra_color);
+ LC_EMIT(t_ra_ifg);
+ LC_EMIT(t_ra_copymin);
+ LC_EMIT(t_ra_ssa);
+ LC_EMIT(t_ra_epilog);
+ LC_EMIT(t_ra_other);
+ LC_EMIT(t_finish);
+ LC_EMIT(t_emit);
+ LC_EMIT(t_verify);
+ LC_EMIT(t_other);
+ );
+#undef LC_EMIT
+
+ be_sched_free_phase(irg);
+
+ be_free_birg(birg);
+
+ /* switched off due to statistics (statistic module needs all irgs) */
+#if 0 /* STA needs irgs */
+#ifdef FIRM_STATISTICS
+ if (! stat_is_active())
+#endif /* FIRM_STATISTICS */
+ free_ir_graph(irg);
+#endif /* if 0 */
+ stat_ev_ctx_pop("bemain_irg");
}
-
+ ir_profile_free();
be_done_env(&env);
}
/* Main interface to the frontend. */
-void be_main(FILE *file_handle)
+void be_main(FILE *file_handle, const char *cup_name)
{
+ ir_timer_t *t = NULL;
+
+ /* The user specified another config file to read. do that now. */
+ if(strlen(config_file) > 0) {
+ FILE *f;
+
+ if((f = fopen(config_file, "rt")) != NULL) {
+ lc_opt_from_file(config_file, f, NULL);
+ fclose(f);
+ }
+ }
+
+ if (be_options.timing == BE_TIME_ON) {
+ t = ir_timer_register("bemain", "measure complete bemain loop");
+
+ if (ir_timer_enter_high_priority()) {
+ fprintf(stderr, "Warning: Could not enter high priority mode.\n");
+ }
+
+ ir_timer_reset_and_start(t);
+ }
+
+#ifdef FIRM_STATISTICS
+ if (be_options.statev) {
+ const char *dot = strrchr(cup_name, '.');
+ const char *pos = dot ? dot : cup_name + strlen(cup_name);
+ char *buf = alloca(pos - cup_name + 1);
+ strncpy(buf, cup_name, pos - cup_name);
+ buf[pos - cup_name] = '\0';
+
+ be_options.statev = 1;
+ stat_ev_begin(buf, be_options.filtev);
+ }
+#endif
+
/* never build code for pseudo irgs */
set_visit_pseudo_irgs(0);
- be_node_init();
- be_main_loop(file_handle);
-}
+ be_node_init();
+
+ be_main_loop(file_handle, cup_name);
-/** The debug info retriever function. */
-static retrieve_dbg_func retrieve_dbg = NULL;
+ if (be_options.timing == BE_TIME_ON) {
+ ir_timer_stop(t);
+ ir_timer_leave_high_priority();
+ stat_ev_if {
+ stat_ev_dbl("backend_time", ir_timer_elapsed_msec(t));
+ } else {
+ printf("%-20s: %lu msec\n", "BEMAINLOOP", ir_timer_elapsed_msec(t));
+ }
+ }
-/* Sets a debug info retriever. */
-void be_set_debug_retrieve(retrieve_dbg_func func) {
- retrieve_dbg = func;
+#ifdef FIRM_STATISTICS
+ if (be_options.statev)
+ stat_ev_end();
+#endif
}
-/* 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;
+unsigned be_put_ignore_regs(const be_irg_t *birg, const arch_register_class_t *cls, bitset_t *bs)
+{
+ if (bs == NULL)
+ bs = bitset_alloca(cls->n_regs);
+ else
+ bitset_clear_all(bs);
+
+ assert(bitset_size(bs) == (unsigned)cls->n_regs);
+ arch_put_non_ignore_regs(birg->main_env->arch_env, cls, bs);
+ bitset_flip_all(bs);
+ be_abi_put_ignore_regs(birg->abi, cls, bs);
+
+ return bitset_popcnt(bs);
}