/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "irprog.h"
#include "irtypeinfo.h"
#include "irgwalk.h"
-#include "irsimpletype.h"
#include "trouts.h"
#include "ircons.h"
#include "irgmod.h"
#include "irflag_t.h"
#include "xmalloc.h"
#include "debug.h"
-#include "tropt.h"
+#include "opt_init.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg;)
/* - statistics ---------------------------------------------- */
-static int n_casts_normalized = 0;
-static int n_casts_removed = 0;
-static int n_sels_concretized = 0;
+static size_t n_casts_normalized = 0;
+static size_t n_casts_removed = 0;
+static size_t n_sels_concretized = 0;
/* - Cast normalization. ------------------------------------- */
* 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) {
+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 {
- 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);
+ res = new_type_pointer(tp);
/* 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, mode_P_data);
+ res = new_type_pointer(tp);
}
return res;
}
/** Return a type that is a depth times pointer to type. */
-static ir_type *pointerize_type(ir_type *tp, int depth) {
+static ir_type *pointerize_type(ir_type *tp, size_t depth)
+{
for (; depth > 0; --depth) {
tp = gen_pointer_type_to(tp);
}
}
-static ir_node *normalize_values_type(ir_type *totype, ir_node *pred) {
+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;
+ ir_node *block;
+ size_t ref_depth = 0;
if (totype == fromtype) return pred; /* Case for optimization! */
while (is_Pointer_type(totype) && is_Pointer_type(fromtype)) {
totype = get_pointer_points_to_type(totype);
fromtype = get_pointer_points_to_type(fromtype);
- ref_depth++;
+ ++ref_depth;
}
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) ) {
+ if ((get_class_supertype_index(totype, fromtype) != (size_t)-1) ||
+ (get_class_supertype_index(fromtype, totype) != (size_t)-1) ) {
/* It's just what we want ... */
return pred;
}
- set_cur_block(get_nodes_block(pred));
+ block = get_nodes_block(pred);
if (is_SubClass_of(totype, fromtype)) {
/* downcast */
- while (get_class_subtype_index(fromtype, totype) == -1) {
+ while (get_class_subtype_index(fromtype, totype) == (size_t)-1) {
/* Insert a cast to a subtype of fromtype. */
ir_type *new_type = NULL;
ir_node *new_cast;
- int i, n_subtypes = get_class_n_subtypes(fromtype);
+ size_t i;
+ size_t n_subtypes = get_class_n_subtypes(fromtype);
for (i = 0; i < n_subtypes && !new_type; ++i) {
ir_type *new_sub = get_class_subtype(fromtype, i);
if (is_SuperClass_of(new_sub, totype))
assert(new_type);
fromtype = new_type;
new_type = pointerize_type(new_type, ref_depth);
- new_cast = new_Cast(pred, new_type);
+ new_cast = new_r_Cast(block, pred, new_type);
pred = new_cast;
- n_casts_normalized ++;
+ ++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);
}
} else {
assert(is_SuperClass_of(totype, fromtype));
/* upcast */
- while (get_class_supertype_index(fromtype, totype) == -1) {
+ while (get_class_supertype_index(fromtype, totype) == (size_t)-1) {
/* Insert a cast to a supertype of fromtype. */
ir_type *new_type = NULL;
- int i, n_supertypes = get_class_n_supertypes(fromtype);
+ size_t i, n_supertypes = get_class_n_supertypes(fromtype);
for (i = 0; i < n_supertypes && !new_type; ++i) {
ir_type *new_super = get_class_supertype(fromtype, i);
if (is_SubClass_of(new_super, totype))
assert(new_type);
fromtype = new_type;
new_type = pointerize_type(new_type, ref_depth);
- new_cast = new_Cast(pred, new_type);
+ new_cast = new_r_Cast(block, pred, new_type);
pred = new_cast;
- n_casts_normalized ++;
+ ++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);
}
/**
* Post-Walker.
*/
-static void normalize_irn_class_cast(ir_node *n, void *env) {
+static void normalize_irn_class_cast(ir_node *n, void *env)
+{
ir_node *res;
(void) env;
if (is_Cast(n)) {
res = normalize_values_type(totype, pred);
set_Cast_op(n, res);
} else if (is_Call(n)) {
- int i, n_params = get_Call_n_params(n);
+ size_t n_params = get_Call_n_params(n);
+ size_t i;
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));
}
-static void pure_normalize_irg_class_casts(ir_graph *irg) {
+static void pure_normalize_irg_class_casts(ir_graph *irg)
+{
assert(get_irg_class_cast_state(irg) != ir_class_casts_any &&
"Cannot normalize irregular casts.");
if (get_irg_class_cast_state(irg) == ir_class_casts_normalized) {
}
-void normalize_irg_class_casts(ir_graph *irg, gen_pointer_type_to_func gppt_fct) {
+void normalize_irg_class_casts(ir_graph *irg, gen_pointer_type_to_func gppt_fct)
+{
assert(get_irp_typeinfo_state() == ir_typeinfo_consistent);
if (gppt_fct) gen_pointer_type_to = gppt_fct;
gen_pointer_type_to = default_gen_pointer_type_to;
}
-void normalize_irp_class_casts(gen_pointer_type_to_func gppt_fct) {
- int i, n_irgs = get_irp_n_irgs();
+void normalize_irp_class_casts(gen_pointer_type_to_func gppt_fct)
+{
+ size_t i, n;
if (gppt_fct) gen_pointer_type_to = gppt_fct;
+#if 0
if (get_irp_typeinfo_state() != ir_typeinfo_consistent)
simple_analyse_types();
+#endif
- for (i = 0; i < n_irgs; ++i) {
- pure_normalize_irg_class_casts(get_irp_irg(i));
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
+ ir_graph *irg = get_irp_irg(i);
+ pure_normalize_irg_class_casts(irg);
}
set_irp_class_cast_state(ir_class_casts_normalized);
gen_pointer_type_to = default_gen_pointer_type_to;
- DB((dbg, SET_LEVEL_1, " Cast normalization: %d Casts inserted.\n", n_casts_normalized));
+ DB((dbg, SET_LEVEL_1, " Cast normalization: %zu Casts inserted.\n", n_casts_normalized));
}
* (T3)(T2)x<T1> -> (T3)x<T1>
*
* if possible.
+ *
+ * @param cast the Cast node
+ *
+ * @return 1 if the cast was changed
*/
-static void cancel_out_casts(ir_node *cast) {
+static int cancel_out_casts(ir_node *cast)
+{
ir_node *orig, *pred = get_Cast_op(cast);
ir_type *tp_cast, *tp_pred, *tp_orig;
- int ref_depth = 0;
- if (!is_Cast(pred)) return;
+ if (!is_Cast(pred)) return 0;
orig = get_Cast_op(pred);
tp_cast = get_Cast_type(cast);
tp_orig = get_irn_typeinfo_type(orig);
while (is_Pointer_type(tp_cast) &&
- is_Pointer_type(tp_pred) &&
- is_Pointer_type(tp_orig) ) {
- tp_cast = get_pointer_points_to_type(tp_cast);
- tp_pred = get_pointer_points_to_type(tp_pred);
- tp_orig = get_pointer_points_to_type(tp_orig);
- ref_depth++;
+ is_Pointer_type(tp_pred) &&
+ is_Pointer_type(tp_orig) ) {
+ tp_cast = get_pointer_points_to_type(tp_cast);
+ tp_pred = get_pointer_points_to_type(tp_pred);
+ tp_orig = get_pointer_points_to_type(tp_orig);
}
- if (!is_Class_type(tp_cast)) return;
- if (!is_Class_type(tp_pred)) return;
- if (!is_Class_type(tp_orig)) return;
+ if (!is_Class_type(tp_cast) || !is_Class_type(tp_pred) || !is_Class_type(tp_orig))
+ return 0;
if (is_SubClass_of(tp_pred, tp_cast) && get_opt_suppress_downcast_optimization())
- return;
+ return 0;
if (tp_cast == tp_orig) {
exchange(cast, orig);
n_casts_removed += 2;
- return;
+ return 1;
}
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;
+ return 0;
}
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 ++;
+ (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;
+ return 1;
}
+ return 0;
}
-static void concretize_selected_entity(ir_node *sel) {
- ir_node *cast, *ptr = get_Sel_ptr(sel);
- ir_type *orig_tp, *cast_tp;
+/**
+ * Optimize Sel(Cast(type, ptr), ent) into Sel(ptr_type, ent_type)
+ *
+ * @param sel the Sel node
+ *
+ * @return 1 if Cast's where removed
+ */
+static int concretize_selected_entity(ir_node *sel)
+{
+ ir_node *cast, *ptr = get_Sel_ptr(sel);
+ ir_type *orig_tp, *cast_tp;
ir_entity *new_ent, *sel_ent;
+ int res = 0;
sel_ent = get_Sel_entity(sel);
- cast = get_Sel_ptr(sel);
+ cast = get_Sel_ptr(sel);
while (is_Cast(cast)) {
cast_tp = get_Cast_type(cast);
- ptr = get_Cast_op(cast);
+ ptr = get_Cast_op(cast);
orig_tp = get_irn_typeinfo_type(ptr);
- if (!is_Pointer_type(orig_tp)) return;
- if (!is_Pointer_type(cast_tp)) return;
+ /* we handle only classes */
+ if (!is_Pointer_type(orig_tp)|| !is_Pointer_type(cast_tp))
+ return res;
orig_tp = get_pointer_points_to_type(orig_tp);
cast_tp = get_pointer_points_to_type(cast_tp);
- if (!is_Class_type(orig_tp)) return;
- if (!is_Class_type(cast_tp)) return;
+ if (!is_Class_type(orig_tp) || !is_Class_type(cast_tp))
+ return res;
/* We only want to concretize, but not generalize. */
- if (!is_SuperClass_of(cast_tp, orig_tp)) return;
+ if (!is_SuperClass_of(cast_tp, orig_tp))
+ return res;
- /* Hmm, we are not properly typed. */
- if (get_class_member_index(cast_tp, sel_ent) == -1) return;
+ /* The sel entity should be a member of the cast_tp, else
+ the graph was not properly typed. */
+ if (get_class_member_index(cast_tp, sel_ent) == (size_t)-1)
+ return res;
new_ent = resolve_ent_polymorphy(orig_tp, sel_ent);
/* New ent must be member of orig_tp. */
- if (get_class_member_index(orig_tp, new_ent) == -1) return;
+ if (get_class_member_index(orig_tp, new_ent) == (size_t)-1)
+ return res;
+ /* all checks done, we can remove the Cast and update the Sel */
set_Sel_entity(sel, new_ent);
set_Sel_ptr(sel, ptr);
- n_sels_concretized++;
+ ++n_sels_concretized;
sel_ent = new_ent;
- cast = ptr;
+ cast = ptr;
+ res = 1;
}
+ return res;
}
-static void concretize_Phi_type(ir_node *phi)
+/**
+ * Move Casts of the same type through a Phi node, i.e.
+ * Phi(Cast(type, x_0), ..., Cast(type, x_n)) -> Cast(type, Phi(x_0, ..., x_n))
+ *
+ * @param phi the Phi node
+ *
+ * @return 1 if Cast's where moved
+ */
+static int concretize_Phi_type(ir_node *phi)
{
int n_preds = get_Phi_n_preds(phi);
ir_node **pred = ALLOCAN(ir_node*, n_preds);
- ir_node *nn;
+ ir_node *nn, *blk;
ir_type *totype;
ir_type *fromtype;
int i;
- if (n_preds == 0) return;
+ if (n_preds == 0)
+ return 0;
pred[0] = get_Phi_pred(phi, 0);
- if (!is_Cast(pred[0])) return;
+ if (!is_Cast(pred[0]))
+ return 0;
- if (!is_Cast_upcast(pred[0])) return;
+ if (!is_Cast_upcast(pred[0]))
+ return 0;
fromtype = get_irn_typeinfo_type(get_Cast_op(pred[0]));
totype = get_Cast_type(pred[0]);
pred[0] = get_Cast_op(pred[0]);
for (i = 1; i < n_preds; ++i) {
pred[i] = get_Phi_pred(phi, i);
- if (!is_Cast(pred[i])) return;
- if (get_irn_typeinfo_type(get_Cast_op(pred[i])) != fromtype) return;
+ if (!is_Cast(pred[i]))
+ return 0;
+ if (get_irn_typeinfo_type(get_Cast_op(pred[i])) != fromtype)
+ return 0;
pred[i] = get_Cast_op(pred[i]);
}
/* Transform Phi */
- set_cur_block(get_nodes_block(phi));
- nn = new_Phi(n_preds, pred, get_irn_mode(phi));
+ blk = get_nodes_block(phi);
+ nn = new_r_Phi(blk, n_preds, pred, get_irn_mode(phi));
set_irn_typeinfo_type(nn, fromtype);
- nn = new_Cast(nn, totype);
+ nn = new_r_Cast(blk, nn, totype);
set_irn_typeinfo_type(nn, totype);
exchange(phi, nn);
+ return 1;
}
-void remove_Cmp_Null_cast(ir_node *cmp) {
+/**
+ * Remove Casted null checks, i.e.
+ *
+ * Cmp(Cast(type, x_orig), NULL_type) -> Cmp(x_orig, NULL_orig)
+ *
+ * @param cmp the Cmp node
+ *
+ * @return 1 if Cast's where removed
+ */
+static int remove_Cmp_Null_cast(ir_node *cmp)
+{
+ ir_graph *irg;
ir_node *cast, *null, *new_null;
- int cast_pos, null_pos;
+ int cast_pos, null_pos;
ir_type *fromtype;
+ ir_mode *mode;
cast = get_Cmp_left(cmp);
- cast_pos = 0;
if (!is_Cast(cast)) {
- null = cast;
- null_pos = cast_pos;
- cast = get_Cmp_right(cmp);
+ null = cast;
+ null_pos = 0;
+ cast = get_Cmp_right(cmp);
cast_pos = 1;
- if (!is_Cast(cast)) return;
+ if (!is_Cast(cast))
+ return 0;
} else {
null = get_Cmp_right(cmp);
+ cast_pos = 0;
null_pos = 1;
}
- if (! is_Const(null)) return;
- if (!mode_is_reference(get_irn_mode(null))) return;
- if (get_Const_tarval(null) != get_mode_null(get_irn_mode(null))) return;
+ if (! is_Const(null))
+ return 0;
+ mode = get_irn_mode(null);
+ if (!mode_is_reference(mode))
+ return 0;
+ if (get_Const_tarval(null) != get_mode_null(mode))
+ return 0;
/* Transform Cmp */
+ irg = get_irn_irg(cmp);
set_irn_n(cmp, cast_pos, get_Cast_op(cast));
fromtype = get_irn_typeinfo_type(get_Cast_op(cast));
- new_null = new_Const_type(get_Const_tarval(null), fromtype);
+ new_null = new_r_Const(irg, get_Const_tarval(null));
set_irn_typeinfo_type(new_null, fromtype);
set_irn_n(cmp, null_pos, new_null);
- n_casts_removed ++;
+ ++n_casts_removed;
+ return 1;
}
/**
- * Post-Walker:
+ * Post-Walker: Optimize class casts (mostly by trying to remove them)
*/
-static void irn_optimize_class_cast(ir_node *n, void *env) {
- (void) env;
+static void irn_optimize_class_cast(ir_node *n, void *env)
+{
+ int *changed = (int*)env;
+
if (is_Cast(n))
- cancel_out_casts(n);
+ *changed |= cancel_out_casts(n);
else if (is_Sel(n))
- concretize_selected_entity(n);
+ *changed |= concretize_selected_entity(n);
else if (is_Phi(n))
- concretize_Phi_type(n);
+ *changed |= concretize_Phi_type(n);
else if (is_Cmp(n))
- remove_Cmp_Null_cast(n);
+ *changed |= remove_Cmp_Null_cast(n);
}
-void optimize_class_casts(void) {
- int i, n_irgs = get_irp_n_irgs();
+void optimize_class_casts(void)
+{
+ int changed;
+#if 0
if (get_irp_typeinfo_state() != ir_typeinfo_consistent)
simple_analyse_types();
+#endif
- all_irg_walk(NULL, irn_optimize_class_cast, NULL);
+ changed = 0;
+ all_irg_walk(NULL, irn_optimize_class_cast, &changed);
- set_trouts_inconsistent();
- for (i = 0; i < n_irgs; ++i)
- set_irg_outs_inconsistent(get_irp_irg(i));
+ if (changed) {
+ set_trouts_inconsistent();
+ }
- DB((dbg, SET_LEVEL_1, " Cast optimization: %d Casts removed, %d Sels concretized.\n",
+ DB((dbg, SET_LEVEL_1, " Cast optimization: %zu Casts removed, %zu Sels concretized.\n",
n_casts_removed, n_sels_concretized));
}
-void firm_init_class_casts_opt(void) {
+void firm_init_class_casts_opt(void)
+{
FIRM_DBG_REGISTER(dbg, "firm.opt.tropt");
}
projects / libfirm / blobdiff