X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Ftailrec.c;h=22b04b10924a68215c00062a3b43cde5a955e6d3;hb=7547cf525ad54f59d2dc3f39d4b257911c94989b;hp=681a3f8b63dea42ea1c1f67ed9f27f3a896df002;hpb=e30e5834fd8c1c3a7d28fc66e99b91a84993bde8;p=libfirm diff --git a/ir/opt/tailrec.c b/ir/opt/tailrec.c index 681a3f8b6..22b04b109 100644 --- a/ir/opt/tailrec.c +++ b/ir/opt/tailrec.c @@ -24,9 +24,7 @@ * @author Michael Beck * @version $Id$ */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif +#include "config.h" #include #include @@ -34,7 +32,7 @@ #include "debug.h" #include "iroptimize.h" #include "scalar_replace.h" -#include "array.h" +#include "array_t.h" #include "irprog_t.h" #include "irgwalk.h" #include "irgmod.h" @@ -47,14 +45,14 @@ #include "irouts.h" #include "irhooks.h" #include "ircons_t.h" -#include "xmalloc.h" +#include "irpass.h" DEBUG_ONLY(static firm_dbg_module_t *dbg); /** * the environment for collecting data */ -typedef struct _collect_t { +typedef struct collect_t { ir_node *proj_X; /**< initial exec proj */ ir_node *block; /**< old first block */ int blk_idx; /**< cfgpred index of the initial exec in block */ @@ -65,7 +63,8 @@ typedef struct _collect_t { /** * walker for collecting data, fills a collect_t environment */ -static void collect_data(ir_node *node, void *env) { +static void collect_data(ir_node *node, void *env) +{ collect_t *data = env; ir_node *pred; ir_op *op; @@ -78,7 +77,7 @@ static void collect_data(ir_node *node, void *env) { if (op == op_Proj) { ir_node *start = get_Proj_pred(pred); - if (get_irn_op(start) == op_Start) { + if (is_Start(start)) { if (get_Proj_proj(pred) == pn_Start_T_args) { /* found Proj(ProjT(Start)) */ set_irn_link(node, data->proj_data); @@ -98,7 +97,7 @@ static void collect_data(ir_node *node, void *env) { /* * the first block has the initial exec as cfg predecessor */ - if (node != get_irg_start_block(current_ir_graph)) { + if (node != get_irg_start_block(get_irn_irg(node))) { for (i = 0; i < n_pred; ++i) { if (get_Block_cfgpred(node, i) == data->proj_X) { data->block = node; @@ -137,7 +136,8 @@ typedef struct tr_env { * @param rets linked list of all rets * @param n_tail_calls number of tail-recursion calls */ -static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { +static void do_opt_tail_rec(ir_graph *irg, tr_env *env) +{ ir_node *end_block = get_irg_end_block(irg); ir_node *block, *jmp, *call, *calls; ir_node **in; @@ -149,9 +149,6 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { int rem = get_optimize(); ir_entity *ent = get_irg_entity(irg); ir_type *method_tp = get_entity_type(ent); - ir_graph *old = current_ir_graph; - - current_ir_graph = irg; assert(env->n_tail_calls > 0); @@ -198,7 +195,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { ir_node *block = get_nodes_block(p); n = get_irn_link(p); - in[i++] = new_r_Jmp(irg, block); + in[i++] = new_r_Jmp(block); // exchange(p, new_r_Bad(irg)); @@ -209,7 +206,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { /* create a new block at start */ block = new_r_Block(irg, env->n_tail_calls + 1, in); - jmp = new_r_Jmp(irg, block); + jmp = new_r_Jmp(block); /* the old first block is now the second one */ set_Block_cfgpred(data.block, data.blk_idx, jmp); @@ -219,7 +216,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { /* build the memory phi */ i = 0; - in[i] = new_r_Proj(irg, get_irg_start_block(irg), get_irg_start(irg), mode_M, pn_Start_M); + in[i] = new_r_Proj(get_irg_start(irg), mode_M, pn_Start_M); set_irg_initial_mem(irg, in[i]); ++i; @@ -229,7 +226,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { } assert(i == env->n_tail_calls + 1); - phis[0] = new_r_Phi(irg, block, env->n_tail_calls + 1, in, mode_M); + phis[0] = new_r_Phi(block, env->n_tail_calls + 1, in, mode_M); /* build the data Phi's */ if (n_params > 0) { @@ -251,11 +248,11 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { for (i = 0; i < n_params; ++i) { ir_mode *mode = get_type_mode(get_method_param_type(method_tp, i)); - in[0] = new_r_Proj(irg, args_bl, args, mode, i); + in[0] = new_r_Proj(args, mode, i); for (j = 0; j < env->n_tail_calls; ++j) in[j + 1] = call_params[j][i]; - phis[i + 1] = new_r_Phi(irg, block, env->n_tail_calls + 1, in, mode); + phis[i + 1] = new_r_Phi(block, env->n_tail_calls + 1, in, mode); } } @@ -276,7 +273,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { set_irg_doms_inconsistent(irg); set_irg_outs_inconsistent(irg); set_irg_extblk_inconsistent(irg); - set_irg_loopinfo_state(current_ir_graph, loopinfo_cf_inconsistent); + set_irg_loopinfo_state(irg, loopinfo_cf_inconsistent); set_trouts_inconsistent(); set_irg_callee_info_state(irg, irg_callee_info_inconsistent); @@ -307,9 +304,9 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { modes[i] = mode; if (env->variants[i] == TR_ADD) { - set_value(i, new_Const(mode, get_mode_null(mode))); + set_value(i, new_r_Const(irg, get_mode_null(mode))); } else if (env->variants[i] == TR_MUL) { - set_value(i, new_Const(mode, get_mode_one(mode))); + set_value(i, new_r_Const(irg, get_mode_one(mode))); } } mature_immBlock(start_block); @@ -331,7 +328,7 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { /* create a new jump, free of CSE */ set_optimize(0); - jmp = new_Jmp(); + jmp = new_r_Jmp(block); set_optimize(rem); for (i = 0; i < env->n_ress; ++i) { @@ -342,14 +339,13 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { } } /* create a new tuple for the return values */ - tuple = new_Tuple(env->n_ress, in); + tuple = new_r_Tuple(block, env->n_ress, in); turn_into_tuple(call, pn_Call_max); set_Tuple_pred(call, pn_Call_M, mem); set_Tuple_pred(call, pn_Call_X_regular, jmp); set_Tuple_pred(call, pn_Call_X_except, bad); set_Tuple_pred(call, pn_Call_T_result, tuple); - set_Tuple_pred(call, pn_Call_M_except, mem); set_Tuple_pred(call, pn_Call_P_value_res_base, bad); for (i = 0; i < env->n_ress; ++i) { @@ -366,12 +362,14 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { end_block = get_irg_end_block(irg); for (i = get_Block_n_cfgpreds(end_block) - 1; i >= 0; --i) { ir_node *ret = get_Block_cfgpred(end_block, i); + ir_node *block; /* search all Returns of a block */ if (! is_Return(ret)) continue; - set_cur_block(get_nodes_block(ret)); + block = get_nodes_block(ret); + set_cur_block(block); for (j = 0; j < env->n_ress; ++j) { ir_node *pred = get_Return_res(ret, j); ir_node *n; @@ -382,13 +380,13 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { case TR_ADD: n = get_value(j, modes[j]); - n = new_Add(n, pred, modes[j]); + n = new_r_Add(block, n, pred, modes[j]); set_Return_res(ret, j, n); break; case TR_MUL: n = get_value(j, modes[j]); - n = new_Mul(n, pred, modes[j]); + n = new_r_Mul(block, n, pred, modes[j]); set_Return_res(ret, j, n); break; @@ -407,7 +405,6 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { exchange(p, bad); } } - current_ir_graph = old; } /** @@ -419,31 +416,34 @@ static void do_opt_tail_rec(ir_graph *irg, tr_env *env) { * * @return non-zero if it's ok to do tail recursion */ -static int check_lifetime_of_locals(ir_graph *irg) { - ir_node *irg_frame, *irg_val_param_base; +static int check_lifetime_of_locals(ir_graph *irg) +{ + ir_node *irg_frame; int i; + ir_type *frame_tp = get_irg_frame_type(irg); irg_frame = get_irg_frame(irg); for (i = get_irn_n_outs(irg_frame) - 1; i >= 0; --i) { ir_node *succ = get_irn_out(irg_frame, i); - if (is_Sel(succ) && is_address_taken(succ)) - return 0; - } - - /* Check if we have compound arguments. - For now, we cannot handle them, */ - irg_val_param_base = get_irg_value_param_base(irg); - if (get_irn_n_outs(irg_val_param_base) > 0) - return 0; + if (is_Sel(succ)) { + /* Check if we have compound arguments. + For now, we cannot handle them, */ + if (get_entity_owner(get_Sel_entity(succ)) != frame_tp) + return 0; + if (is_address_taken(succ)) + return 0; + } + } return 1; } /** * Examine irn and detect the recursion variant. */ -static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { +static tail_rec_variants find_variant(ir_node *irn, ir_node *call) +{ ir_node *a, *b; tail_rec_variants va, vb, res; @@ -455,7 +455,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { case iro_Add: /* try additive */ a = get_Add_left(irn); - if (get_irn_MacroBlock(a) != get_irn_MacroBlock(call)) { + if (get_nodes_block(a) != get_nodes_block(call)) { /* we are outside, ignore */ va = TR_UNKNOWN; } else { @@ -464,7 +464,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { return TR_BAD; } b = get_Add_right(irn); - if (get_irn_MacroBlock(b) != get_irn_MacroBlock(call)) { + if (get_nodes_block(b) != get_nodes_block(call)) { /* we are outside, ignore */ vb = TR_UNKNOWN; } else { @@ -491,7 +491,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { case iro_Sub: /* try additive, but return value must be left */ a = get_Sub_left(irn); - if (get_irn_MacroBlock(a) != get_irn_MacroBlock(call)) { + if (get_nodes_block(a) != get_nodes_block(call)) { /* we are outside, ignore */ va = TR_UNKNOWN; } else { @@ -500,7 +500,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { return TR_BAD; } b = get_Sub_right(irn); - if (get_irn_MacroBlock(b) != get_irn_MacroBlock(call)) { + if (get_nodes_block(b) != get_nodes_block(call)) { /* we are outside, ignore */ vb = TR_UNKNOWN; } else { @@ -517,7 +517,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { case iro_Mul: /* try multiplicative */ a = get_Mul_left(irn); - if (get_irn_MacroBlock(a) != get_irn_MacroBlock(call)) { + if (get_nodes_block(a) != get_nodes_block(call)) { /* we are outside, ignore */ va = TR_UNKNOWN; } else { @@ -526,7 +526,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { return TR_BAD; } b = get_Mul_right(irn); - if (get_irn_MacroBlock(b) != get_irn_MacroBlock(call)) { + if (get_nodes_block(b) != get_nodes_block(call)) { /* we are outside, ignore */ vb = TR_UNKNOWN; } else { @@ -570,7 +570,8 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) { /* * convert simple tail-calls into loops */ -int opt_tail_rec_irg(ir_graph *irg) { +int opt_tail_rec_irg(ir_graph *irg) +{ tr_env env; ir_node *end_block; int i, n_ress, n_tail_calls = 0; @@ -578,12 +579,13 @@ int opt_tail_rec_irg(ir_graph *irg) { ir_type *mtd_type, *call_type; ir_entity *ent; + FIRM_DBG_REGISTER(dbg, "firm.opt.tailrec"); + assure_irg_outs(irg); if (! check_lifetime_of_locals(irg)) return 0; - ent = get_irg_entity(irg); mtd_type = get_entity_type(ent); n_ress = get_method_n_ress(mtd_type); @@ -704,10 +706,16 @@ int opt_tail_rec_irg(ir_graph *irg) { return n_tail_calls; } +ir_graph_pass_t *opt_tail_rec_irg_pass(const char *name) +{ + return def_graph_pass_ret(name ? name : "tailrec", opt_tail_rec_irg); +} + /* * optimize tail recursion away */ -void opt_tail_recursion(void) { +void opt_tail_recursion(void) +{ int i; int n_opt_applications = 0; ir_graph *irg; @@ -717,8 +725,6 @@ void opt_tail_recursion(void) { for (i = get_irp_n_irgs() - 1; i >= 0; --i) { irg = get_irp_irg(i); - current_ir_graph = irg; - ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK); if (opt_tail_rec_irg(irg)) ++n_opt_applications; @@ -729,3 +735,8 @@ void opt_tail_recursion(void) { DB((dbg, LEVEL_1, "Performed tail recursion for %d of %d graphs\n", n_opt_applications, get_irp_n_irgs())); } + +ir_prog_pass_t *opt_tail_recursion_pass(const char *name) +{ + return def_prog_pass(name ? name : "tailrec", opt_tail_recursion); +}