3 * @author Sebastian Hack
13 #include <libcore/lc_opts.h>
14 #include <libcore/lc_opts_enum.h>
15 #endif /* WITH_LIBCORE */
26 #include "iredges_t.h"
32 #include "firm/bearch_firm.h"
33 #include "ia32/bearch_ia32.h"
34 #include "arm/bearch_arm.h"
35 #include "ppc32/bearch_ppc32.h"
36 #include "mips/bearch_mips.h"
43 #include "besched_t.h"
44 #include "belistsched.h"
46 #include "bespillilp.h"
47 #include "bespillbelady.h"
49 #include "beraextern.h"
50 #include "bechordal_t.h"
52 #include "beifg_impl.h"
53 #include "becopyopt.h"
54 #include "becopystat.h"
55 #include "bessadestr.h"
59 #define DUMP_INITIAL (1 << 0)
60 #define DUMP_ABI (1 << 1)
61 #define DUMP_SCHED (1 << 2)
62 #define DUMP_PREPARED (1 << 3)
63 #define DUMP_RA (1 << 4)
64 #define DUMP_FINAL (1 << 5)
66 /* options visible for anyone */
67 static be_options_t be_options = {
69 "i44pc52.info.uni-karlsruhe.de",
76 static unsigned dump_flags = 2 * DUMP_FINAL - 1;
78 /* register allocator to use. */
79 static const be_ra_t *ra = &be_ra_chordal_allocator;
81 /* back end instruction set architecture to use */
82 static const arch_isa_if_t *isa_if = &ia32_isa_if;
85 static lc_opt_entry_t *be_grp_root = NULL;
87 /* possible dumping options */
88 static const lc_opt_enum_mask_items_t dump_items[] = {
90 { "initial", DUMP_INITIAL },
92 { "sched", DUMP_SCHED },
93 { "prepared", DUMP_PREPARED },
94 { "regalloc", DUMP_RA },
95 { "final", DUMP_FINAL },
96 { "all", 2 * DUMP_FINAL - 1 },
100 /* register allocators */
101 static const lc_opt_enum_const_ptr_items_t ra_items[] = {
102 { "chordal", &be_ra_chordal_allocator },
103 { "external", &be_ra_external_allocator },
107 /* instruction set architectures. */
108 static const lc_opt_enum_const_ptr_items_t isa_items[] = {
109 { "firm", &firm_isa },
110 { "ia32", &ia32_isa_if },
111 { "arm", &arm_isa_if },
112 { "ppc32", &ppc32_isa_if },
113 { "mips", &mips_isa_if },
117 static lc_opt_enum_mask_var_t dump_var = {
118 &dump_flags, dump_items
121 static lc_opt_enum_const_ptr_var_t ra_var = {
122 (const void **) &ra, ra_items
125 static lc_opt_enum_const_ptr_var_t isa_var = {
126 (const void **) &isa_if, isa_items
129 static const lc_opt_table_entry_t be_main_options[] = {
130 LC_OPT_ENT_ENUM_MASK("dump", "dump irg on several occasions", &dump_var),
131 LC_OPT_ENT_ENUM_PTR("ra", "register allocator", &ra_var),
132 LC_OPT_ENT_ENUM_PTR("isa", "the instruction set architecture", &isa_var),
133 LC_OPT_ENT_NEGBOOL("noomitfp", "do not omit frame pointer", &be_omit_fp),
136 LC_OPT_ENT_STR ("ilp.server", "the ilp server name", be_options.ilp_server, sizeof(be_options.ilp_server)),
137 LC_OPT_ENT_STR ("ilp.solver", "the ilp solver name", be_options.ilp_solver, sizeof(be_options.ilp_solver)),
138 #endif /* WITH_ILP */
142 #endif /* WITH_LIBCORE */
144 void be_opt_register(void)
148 lc_opt_entry_t *be_grp_ra;
149 static int run_once = 0;
153 be_grp_root = lc_opt_get_grp(firm_opt_get_root(), "be");
154 be_grp_ra = lc_opt_get_grp(be_grp_root, "ra");
156 lc_opt_add_table(be_grp_root, be_main_options);
158 /* register allocator options */
159 for(i = 0; ra_items[i].name != NULL; ++i) {
160 const be_ra_t *ra = ra_items[i].value;
161 ra->register_options(be_grp_ra);
164 /* register isa options */
165 for(i = 0; isa_items[i].name != NULL; ++i) {
166 const arch_isa_if_t *isa = isa_items[i].value;
167 isa->register_options(be_grp_root);
170 #endif /* WITH_LIBCORE */
173 /* Parse one argument. */
174 int be_parse_arg(const char *arg) {
176 return lc_opt_from_single_arg(be_grp_root, NULL, arg, NULL);
177 #endif /* WITH_LIBCORE */
193 static be_main_env_t *be_init_env(be_main_env_t *env, FILE *file_handle)
195 memset(env, 0, sizeof(*env));
196 obstack_init(&env->obst);
197 env->arch_env = obstack_alloc(&env->obst, sizeof(env->arch_env[0]));
198 env->options = &be_options;
199 FIRM_DBG_REGISTER(env->dbg, "be.main");
201 arch_env_init(env->arch_env, isa_if, file_handle);
203 /* Register the irn handler of the architecture */
204 if (arch_isa_get_irn_handler(env->arch_env->isa))
205 arch_env_push_irn_handler(env->arch_env, arch_isa_get_irn_handler(env->arch_env->isa));
208 * Register the node handler of the back end infrastructure.
209 * This irn handler takes care of the platform independent
210 * spill, reload and perm nodes.
212 arch_env_push_irn_handler(env->arch_env, &be_node_irn_handler);
213 env->phi_handler = be_phi_handler_new(env->arch_env);
214 arch_env_push_irn_handler(env->arch_env, env->phi_handler);
219 static void be_done_env(be_main_env_t *env)
221 env->arch_env->isa->impl->done(env->arch_env->isa);
222 be_phi_handler_free(env->phi_handler);
223 obstack_free(&env->obst, NULL);
226 static void dump(int mask, ir_graph *irg, const char *suffix,
227 void (*dumper)(ir_graph *, const char *))
229 if(dump_flags & mask)
230 be_dump(irg, suffix, dumper);
234 * Prepare a backend graph for code generation.
236 static void prepare_graph(be_irg_t *birg)
238 ir_graph *irg = birg->irg;
240 /* Normalize proj nodes. */
241 normalize_proj_nodes(irg);
243 /* Make just one return node. */
244 normalize_one_return(irg);
246 /* Remove critical edges */
247 remove_critical_cf_edges(irg);
249 /* Compute the dominance information. */
253 /* Ensure, that the ir_edges are computed. */
256 /* check, if the dominance property is fulfilled. */
257 be_check_dominance(irg);
259 /* reset the phi handler. */
260 be_phi_handler_reset(birg->main_env->phi_handler);
264 * The Firm backend main loop.
265 * Do architecture specific lowering for all graphs
266 * and call the architecture specific code generator.
268 static void be_main_loop(FILE *file_handle)
274 be_init_env(&env, file_handle);
276 isa = arch_env_get_isa(env.arch_env);
279 for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
280 ir_graph *irg = get_irp_irg(i);
281 const arch_code_generator_if_t *cg_if;
285 birg.main_env = &env;
287 DBG((env.dbg, LEVEL_2, "====> IRG: %F\n", irg));
288 dump(DUMP_INITIAL, irg, "-begin", dump_ir_block_graph);
290 /* set the current graph (this is important for several firm functions) */
291 current_ir_graph = birg.irg;
293 /* Get the code generator interface. */
294 cg_if = isa->impl->get_code_generator_if(isa);
296 /* get a code generator for this graph. */
297 birg.cg = cg_if->init(&birg);
299 /* create the code generator and generate code. */
300 prepare_graph(&birg);
302 /* some transformations need to be done before abi introduce */
303 arch_code_generator_before_abi(birg.cg);
305 /* implement the ABI conventions. */
306 birg.abi = be_abi_introduce(&birg);
307 dump(DUMP_ABI, irg, "-abi", dump_ir_block_graph);
310 arch_code_generator_prepare_graph(birg.cg);
313 * Since the code generator made a lot of new nodes and skipped
314 * a lot of old ones, we should do dead node elimination here.
315 * Note that this requires disabling the edges here.
317 edges_deactivate(irg);
318 //dead_node_elimination(irg);
321 /* Compute loop nesting information (for weighting copies) */
322 construct_cf_backedges(irg);
324 dump(DUMP_PREPARED, irg, "-prepared", dump_ir_block_graph);
326 /* add Keeps for should_be_different constrained nodes */
327 assure_constraints(&birg);
328 dump(DUMP_PREPARED, irg, "-assured", dump_ir_block_graph);
330 /* Schedule the graphs. */
331 arch_code_generator_before_sched(birg.cg);
332 list_sched(env.arch_env, irg);
334 /* connect all stack modifying nodes together (see beabi.c) */
335 be_abi_fix_stack_nodes(birg.abi);
336 dump(DUMP_SCHED, irg, "-sched", dump_ir_block_graph_sched);
338 /* Verify the schedule */
339 sched_verify_irg(irg);
341 /* Do register allocation */
342 arch_code_generator_before_ra(birg.cg);
344 dump(DUMP_RA, irg, "-ra", dump_ir_block_graph_sched);
346 arch_code_generator_after_ra(birg.cg);
347 be_abi_fix_stack_bias(birg.abi);
349 arch_code_generator_done(birg.cg);
350 dump(DUMP_FINAL, irg, "-end", dump_ir_block_graph_sched);
351 be_abi_free(birg.abi);
353 // free_ir_graph(irg);
359 /* Main interface to the frontend. */
360 void be_main(FILE *file_handle)
362 /* never build code for pseudo irgs */
363 set_visit_pseudo_irgs(0);
366 be_main_loop(file_handle);
369 /** The debug info retriever function. */
370 static retrieve_dbg_func retrieve_dbg = NULL;
372 /* Sets a debug info retriever. */
373 void be_set_debug_retrieve(retrieve_dbg_func func) {
377 /* Retrieve the debug info. */
378 const char *be_retrieve_dbg_info(const dbg_info *dbg, unsigned *line) {
380 return retrieve_dbg(dbg, line);