X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Ftropt.c;h=d2bc5eaefadf9c018c965657c0eb54373a4a70a0;hb=fe4dd08ecc09bf5c9e63cc2d2cb756295af7b423;hp=94d03503b15f666e3cbc4d32067eba474b723574;hpb=24a9d97ee441121394fa8f78cd818528941d908f;p=libfirm diff --git a/ir/opt/tropt.c b/ir/opt/tropt.c index 94d03503b..d2bc5eaef 100644 --- a/ir/opt/tropt.c +++ b/ir/opt/tropt.c @@ -1,34 +1,45 @@ -/** - * @file tropt.c +/* + * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * + * This file is part of libFirm. * - * Project: libFIRM - * File name: ir/opt/tropt.c - * Purpose: Optimize the type representation. - * Author: Goetz Lindenmaier - * Modified by: - * Created: 20.4.2005 - * CVS-ID: $Id$ - * Copyright: (c) 2005 Universität Karlsruhe - * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + * 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. * - * Perform optimizations of the type representation. + * 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. */ -#include +/** + * @file + * @brief Perform optimizations of the type representation. + * @date 20.4.2005 + * @author Goetz Lindenmaier + * @version $Id$ + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif -#include "tropt.h" +#include +#include "iroptimize.h" #include "irprog.h" -#include "mangle.h" - -#include "tr_inheritance.h" #include "irtypeinfo.h" #include "irgwalk.h" #include "irsimpletype.h" #include "trouts.h" #include "ircons.h" #include "irgmod.h" -#include "irflag.h" +#include "irflag_t.h" +#include "xmalloc.h" /* - statistics ---------------------------------------------- */ @@ -38,48 +49,53 @@ static int n_sels_concretized = 0; /* - Cast normalization. ------------------------------------- */ -static type *default_gen_pointer_type_to(type *tp); +static ir_type *default_gen_pointer_type_to(ir_type *tp); #define PTR_TYPE_SUFFIX "cc_ptr_tp" /* class cast pointer type. */ static ident *ptr_type_suffix = NULL; static gen_pointer_type_to_func gen_pointer_type_to = default_gen_pointer_type_to; -static type *default_gen_pointer_type_to(type *tp) { - type *res = NULL; +/** + * Find a pointer type to a given type. + * Uses and updates trouts if available. + */ +static ir_type *default_gen_pointer_type_to(ir_type *tp) { + ir_type *res = NULL; if (get_trouts_state() == outs_consistent) { if (get_type_n_pointertypes_to(tp) > 0) { res = get_type_pointertype_to(tp, 0); } else { - res = new_type_pointer(mangle_u(get_type_ident(tp), ptr_type_suffix), tp); - /* Update trout for pointertypes, so we can use it in next call. */ + ir_mode *mode = is_Method_type(tp) ? mode_P_code : mode_P_data; + + res = new_type_pointer(mangle_u(get_type_ident(tp), ptr_type_suffix), tp, mode); + /* Update trout for pointer types, so we can use it in next call. */ add_type_pointertype_to(tp, res); } - } else { + } + else { res = find_pointer_type_to_type(tp); if (res == firm_unknown_type) - res = new_type_pointer(mangle_u(get_type_ident(tp), ptr_type_suffix), tp); + res = new_type_pointer(mangle_u(get_type_ident(tp), ptr_type_suffix), tp, mode_P_data); } return res; } -/* Return a type that is a depth times pointer to type. */ -static type *pointerize_type(type *tp, int depth) { +/** Return a type that is a depth times pointer to type. */ +static ir_type *pointerize_type(ir_type *tp, int depth) { for (; depth > 0; --depth) { tp = gen_pointer_type_to(tp); } return tp; } -static void normalize_irn_class_cast(ir_node *n, void *env) { - if (get_irn_op(n) != op_Cast) return; - - type *fromtype = get_irn_typeinfo_type(get_Cast_op(n)); - type *totype = get_Cast_type(n); +static ir_node *normalize_values_type(ir_type *totype, ir_node *pred) { + ir_type *fromtype = get_irn_typeinfo_type(pred); + ir_node *new_cast = pred; int ref_depth = 0; - if (totype == fromtype) return; /* Case for optimization! */ + if (totype == fromtype) return pred; /* Case for optimization! */ while (is_Pointer_type(totype) && is_Pointer_type(fromtype)) { totype = get_pointer_points_to_type(totype); @@ -87,60 +103,78 @@ static void normalize_irn_class_cast(ir_node *n, void *env) { ref_depth++; } - if (!is_Class_type(totype)) return; - if (!is_Class_type(fromtype)) return; + if (!is_Class_type(totype)) return pred; + if (!is_Class_type(fromtype)) return pred; if ((get_class_supertype_index(totype, fromtype) != -1) || (get_class_supertype_index(fromtype, totype) != -1) ) { /* It's just what we want ... */ - return; + return pred; } - set_cur_block(get_nodes_block(n)); + set_cur_block(get_nodes_block(pred)); - if (is_subclass_of(totype, fromtype)) { + if (is_SubClass_of(totype, fromtype)) { /* downcast */ while (get_class_subtype_index(fromtype, totype) == -1) { /* Insert a cast to a subtype of fromtype. */ - type *new_type = NULL; + ir_type *new_type = NULL; ir_node *new_cast; int i, n_subtypes = get_class_n_subtypes(fromtype); for (i = 0; i < n_subtypes && !new_type; ++i) { - type *new_sub = get_class_subtype(fromtype, i); - if (is_superclass_of(new_sub, totype)) - new_type = new_sub; + ir_type *new_sub = get_class_subtype(fromtype, i); + if (is_SuperClass_of(new_sub, totype)) + new_type = new_sub; } assert(new_type); fromtype = new_type; new_type = pointerize_type(new_type, ref_depth); - new_cast = new_Cast(get_Cast_op(n), new_type); + new_cast = new_Cast(pred, new_type); + pred = new_cast; n_casts_normalized ++; set_irn_typeinfo_type(new_cast, new_type); /* keep type information up to date. */ - set_Cast_op(n, new_cast); if (get_trouts_state() != outs_none) add_type_cast(new_type, new_cast); } } else { - assert(is_superclass_of(totype, fromtype)); + assert(is_SuperClass_of(totype, fromtype)); /* upcast */ while (get_class_supertype_index(fromtype, totype) == -1) { /* Insert a cast to a supertype of fromtype. */ - type *new_type = NULL; - ir_node *new_cast; + ir_type *new_type = NULL; int i, n_supertypes = get_class_n_supertypes(fromtype); for (i = 0; i < n_supertypes && !new_type; ++i) { - type *new_super = get_class_supertype(fromtype, i); - if (is_subclass_of(new_super, totype)) + ir_type *new_super = get_class_supertype(fromtype, i); + if (is_SubClass_of(new_super, totype)) new_type = new_super; } assert(new_type); fromtype = new_type; new_type = pointerize_type(new_type, ref_depth); - new_cast = new_Cast(get_Cast_op(n), new_type); + new_cast = new_Cast(pred, new_type); + pred = new_cast; n_casts_normalized ++; set_irn_typeinfo_type(new_cast, new_type); /* keep type information up to date. */ if (get_trouts_state() != outs_none) add_type_cast(new_type, new_cast); - set_Cast_op(n, new_cast); + } + } + return new_cast; +} + + +static void normalize_irn_class_cast(ir_node *n, void *env) { + ir_node *res; + if (get_irn_op(n) == op_Cast) { + ir_node *pred = get_Cast_op(n); + ir_type *totype = get_Cast_type(n); + res = normalize_values_type(totype, pred); + set_Cast_op(n, res); + } else if (get_irn_op(n) == op_Call) { + int i, n_params = get_Call_n_params(n); + ir_type *tp = get_Call_type(n); + for (i = 0; i < n_params; ++i) { + res = normalize_values_type(get_method_param_type(tp, i), get_Call_param(n, i)); + set_Call_param(n, i, res); } } } @@ -195,9 +229,18 @@ void normalize_irp_class_casts(gen_pointer_type_to_func gppt_fct) { /* - Cast optimization. ------------------------------------------- */ +/** + * Optimizes Casts: + * + * (T1)(T2)x -> x + * + * (T3)(T2)x -> (T3)x + * + * if possible. + */ static void cancel_out_casts(ir_node *cast) { ir_node *orig, *pred = get_Cast_op(cast); - type *tp_cast, *tp_pred, *tp_orig; + ir_type *tp_cast, *tp_pred, *tp_orig; int ref_depth = 0; if (get_irn_op(pred) != op_Cast) return; @@ -220,7 +263,7 @@ static void cancel_out_casts(ir_node *cast) { if (!is_Class_type(tp_pred)) return; if (!is_Class_type(tp_orig)) return; - if (is_subclass_of(tp_pred, tp_cast) && get_opt_suppress_downcast_optimization()) + if (is_SubClass_of(tp_pred, tp_cast) && get_opt_suppress_downcast_optimization()) return; if (tp_cast == tp_orig) { @@ -229,12 +272,16 @@ static void cancel_out_casts(ir_node *cast) { return; } - if (!(is_subclass_of (tp_cast, tp_orig) || is_subclass_of (tp_orig, tp_cast))) - /* Avoid (B2)(A)(new B1()) --> (B2)(new B1()) */ + if (!(is_SubClass_of (tp_cast, tp_orig) || is_SubClass_of (tp_orig, tp_cast))) { + /* Avoid (B2)(A)(new B1()) --> (B2)(new B1()) + * if B1 =!> B2 and B2 =!> B1 + */ return; + } - if ((is_subclass_of (tp_cast, tp_pred) && is_superclass_of(tp_pred, tp_orig)) || - (is_superclass_of(tp_cast, tp_pred) && is_subclass_of (tp_pred, tp_orig)) ) { + if ((is_SubClass_of (tp_cast, tp_pred) && is_SuperClass_of(tp_pred, tp_orig)) || + (is_SuperClass_of(tp_cast, tp_pred) && is_SubClass_of (tp_pred, tp_orig)) ) { + /* Cast --> Pred --> Orig */ set_Cast_op (cast, orig); n_casts_removed ++; } @@ -242,8 +289,8 @@ static void cancel_out_casts(ir_node *cast) { static void concretize_selected_entity(ir_node *sel) { ir_node *cast, *ptr = get_Sel_ptr(sel); - type *orig_tp, *cast_tp; - entity *new_ent, *sel_ent; + ir_type *orig_tp, *cast_tp; + ir_entity *new_ent, *sel_ent; sel_ent = get_Sel_entity(sel); cast = get_Sel_ptr(sel); @@ -260,8 +307,8 @@ static void concretize_selected_entity(ir_node *sel) { if (!is_Class_type(orig_tp)) return; if (!is_Class_type(cast_tp)) return; - /* We only want to contretize, but not generalize. */ - if (!is_superclass_of(cast_tp, orig_tp)) return; + /* We only want to concretize, but not generalize. */ + if (!is_SuperClass_of(cast_tp, orig_tp)) return; /* Hmm, we are not properly typed. */ if (get_class_member_index(cast_tp, sel_ent) == -1) return; @@ -284,7 +331,7 @@ static void concretize_Phi_type(ir_node *phi) { int i, n_preds = get_Phi_n_preds(phi); ir_node **pred = alloca(n_preds * sizeof(ir_node *)); ir_node *new; - type *totype, *fromtype; + ir_type *totype, *fromtype; if (n_preds == 0) return; pred[0] = get_Phi_pred(phi, 0); @@ -316,7 +363,7 @@ static void concretize_Phi_type(ir_node *phi) { void remove_Cmp_Null_cast(ir_node *cmp) { ir_node *cast, *null, *new_null; int cast_pos, null_pos; - type *fromtype; + ir_type *fromtype; cast = get_Cmp_left(cmp); cast_pos = 0; @@ -344,6 +391,9 @@ void remove_Cmp_Null_cast(ir_node *cmp) { n_casts_removed ++; } +/** + * Post-Walker: + */ static void irn_optimize_class_cast(ir_node *n, void *env) { if (get_irn_op(n) == op_Cast) cancel_out_casts(n); @@ -368,7 +418,7 @@ void optimize_class_casts(void) { set_irg_outs_inconsistent(get_irp_irg(i)); if (get_opt_optimize_class_casts_verbose() && get_firm_verbosity()) { - printf(" Cast optimization: %d Casts removed, %d sels concretized.\n", + printf(" Cast optimization: %d Casts removed, %d Sels concretized.\n", n_casts_removed, n_sels_concretized); } }