/*
- * Project: libFIRM
- * File name: ir/ana/irbackedge.c
- * Purpose: Access function for backedges.
- * Author: Goetz Lindenmaier
- * Modified by:
- * Created: 7.2002
- * CVS-ID: $Id$
- * Copyright: (c) 2002-2003 Universität Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * Copyright (C) 1995-2011 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.
*/
-#ifdef HAVE_CONFIG_H
+/**
+ * @file
+ * @brief Access function for backedges.
+ * @author Goetz Lindenmaier
+ * @date 7.2002
+ */
#include "config.h"
-#endif
#include "irnode_t.h"
#include "irgraph_t.h"
#include "array.h"
#include "irbackedge_t.h"
+#include "raw_bitset.h"
/*--------------------------------------------------------------------*/
/* Backedge information. */
* Does not assert whether the backarray is correct -- use
* very careful!
*/
-static INLINE int *mere_get_backarray(ir_node *n) {
- switch (get_irn_opcode(n)) {
- case iro_Block:
- if (!get_Block_matured(n)) return NULL;
- if (get_interprocedural_view() && n->attr.block.in_cg) {
- assert(n->attr.block.cg_backedge && "backedge array not allocated!");
- return n->attr.block.cg_backedge;
- } else {
- assert(n->attr.block.backedge && "backedge array not allocated!");
- return n->attr.block.backedge;
- }
- break;
- case iro_Phi:
- assert(n->attr.phi_backedge && "backedge array not allocated!");
- return n->attr.phi_backedge;
- break;
- case iro_Filter:
- if (get_interprocedural_view()) {
- assert(n->attr.filter.backedge && "backedge array not allocated!");
- return n->attr.filter.backedge;
- }
- break;
- default: ;
- }
- return NULL;
+static bitset_t *mere_get_backarray(const ir_node *n)
+{
+ switch (get_irn_opcode(n)) {
+ case iro_Block:
+ if (!get_Block_matured(n)) return NULL;
+
+ assert(n->attr.block.backedge && "backedge array not allocated!");
+ return n->attr.block.backedge;
+ case iro_Phi:
+ assert(n->attr.phi.u.backedge && "backedge array not allocated!");
+ return n->attr.phi.u.backedge;
+ default:
+ break;
+ }
+ return NULL;
}
/**
* Returns backarray if the node can have backedges, else returns
* NULL.
*/
-static INLINE int *get_backarray(ir_node *n) {
- int *ba = mere_get_backarray(n);
-
- if (ba) {
- int bal = ARR_LEN(ba); /* avoid makro expansion in assertion. */
- int inl = ARR_LEN(get_irn_in(n)) -1; /* Use get_irn_in -- sensitive to view! */
- assert(bal == inl && "backedge array with faulty length");
- }
+static bitset_t *get_backarray(const ir_node *n)
+{
+ bitset_t *ba = mere_get_backarray(n);
+
+#ifndef NDEBUG
+ if (ba) {
+ size_t bal = bitset_size(ba); /* avoid macro expansion in assertion. */
+ size_t inl = get_irn_arity(n);
+ assert(bal == inl && "backedge array with faulty length");
+ }
+#endif
- return ba;
+ return ba;
}
+#ifndef NDEBUG
/**
- * Returns nin-zero if node has no backarray, or
+ * Returns non-zero if node has no backarray, or
* if size of backarray == size of in array.
*/
-static INLINE int legal_backarray (ir_node *n) {
- int *ba = mere_get_backarray(n);
- if (ba && (ARR_LEN(ba) != ARR_LEN(get_irn_in(n))-1)) /* Use get_irn_in -- sensitive to view! */
- return 0;
- return 1;
+static int legal_backarray(const ir_node *n)
+{
+ bitset_t *ba = mere_get_backarray(n);
+ if (ba && (bitset_size(ba) != (unsigned) get_irn_arity(n)))
+ return 0;
+ return 1;
}
+#endif
+void fix_backedges(struct obstack *obst, ir_node *n)
+{
+ bitset_t *arr = mere_get_backarray(n);
+ unsigned opc;
+ int arity;
-void fix_backedges(struct obstack *obst, ir_node *n) {
- int *arr = mere_get_backarray(n);
- ir_opcode opc;
-
- if (! arr)
- return;
-
- if (ARR_LEN(arr) != ARR_LEN(get_irn_in(n))-1) {
- arr = new_backedge_arr(obst, ARR_LEN(get_irn_in(n))-1);
-
- opc = get_irn_opcode(n);
- if (opc == iro_Phi)
- n->attr.phi_backedge = arr;
- else if (opc == iro_Block) {
- if (!get_interprocedural_view())
- n->attr.block.backedge = arr;
- else
- n->attr.block.cg_backedge = arr;
- }
- else if (opc == iro_Filter)
- n->attr.filter.backedge = arr;
- }
-
- assert(legal_backarray(n));
-
- /* @@@ more efficient in memory consumption, not possible with
- array implementation.
- if (ARR_LEN(arr) < ARR_LEN(get_irn_in(n))-1) {
- ARR_SETLEN(int, arr, ARR_LEN(get_irn_in(n))-1);
- }*/
-}
+ if (! arr)
+ return;
-int is_inter_backedge(ir_node *n, int pos) {
- int res;
- int rem = get_interprocedural_view();
- set_interprocedural_view(0);
- res = is_backedge(n, pos);
- set_interprocedural_view(rem);
- return res;
-}
-
-int is_intra_backedge(ir_node *n, int pos) {
- int res;
- int rem = get_interprocedural_view();
- set_interprocedural_view(1);
- res = is_backedge(n, pos);
- set_interprocedural_view(rem);
- return res;
-}
+ arity = get_irn_arity(n);
+ if (bitset_size(arr) != (unsigned) arity) {
+ arr = new_backedge_arr(obst, arity);
+ opc = get_irn_opcode(n);
+ if (opc == iro_Phi)
+ n->attr.phi.u.backedge = arr;
+ else if (opc == iro_Block) {
+ n->attr.block.backedge = arr;
+ }
+ }
-/* Returns non-zero if the predecessor pos is a backedge. */
-int is_backedge (ir_node *n, int pos) {
- int *ba = get_backarray (n);
- if (ba) return ba[pos];
- return 0;
+ assert(legal_backarray(n));
}
-/* Remarks that edge pos is a backedge. */
-void set_backedge (ir_node *n, int pos) {
- int *ba = get_backarray (n);
- assert(ba && "can only set backedges at Phi, Filter, Block nodes.");
- ba[pos] = 1;
+int is_backedge(const ir_node *n, int pos)
+{
+ bitset_t *ba = get_backarray(n);
+ if (ba)
+ return bitset_is_set(ba, pos);
+ return 0;
}
-/* Remarks that edge pos is a backedge. */
-void set_not_backedge (ir_node *n, int pos) {
- int *ba = get_backarray (n);
- assert(ba && "can only set backedges at Phi, Filter, Block nodes.");
- ba[pos] = 0;
+void set_backedge(ir_node *n, int pos)
+{
+ bitset_t *ba = get_backarray(n);
+ assert(ba && "can only set backedges at Phi, Block nodes.");
+ bitset_set(ba, pos);
}
-/* Returns non-zero if n has backedges. */
-int has_backedges (ir_node *n) {
- int i;
- int *ba = get_backarray (n);
- if (ba) {
- int arity = get_irn_arity(n);
- for (i = 0; i < arity; i++)
- if (ba[i]) return 1;
- }
- return 0;
+void set_not_backedge(ir_node *n, int pos)
+{
+ bitset_t *ba = get_backarray(n);
+ assert(ba && "can only set backedges at Phi, Block nodes.");
+ bitset_clear(ba, pos);
}
-/** Sets all backedge information to zero. */
-void clear_backedges (ir_node *n) {
- int i, arity;
- int rem = get_interprocedural_view();
- int *ba;
- set_interprocedural_view(0);
- ba = get_backarray (n);
- if (ba) {
- arity = get_irn_arity(n);
- for (i = 0; i < arity; i++)
- ba[i] = 0;
- }
- set_interprocedural_view(1);
- ba = get_backarray (n);
- if (ba) {
- arity = get_irn_arity(n);
- for (i = 0; i < arity; i++)
- ba[i] = 0;
- }
- set_interprocedural_view(rem);
+int has_backedges(const ir_node *n)
+{
+ bitset_t *ba = get_backarray(n);
+ if (ba != NULL) {
+ return !bitset_is_empty(ba);
+ }
+ return 0;
}
-int *new_backedge_arr(struct obstack *obst, int size) {
- int *res = NEW_ARR_D (int, obst, size);
- memset(res, 0, sizeof(int) * size);
- return res;
+void clear_backedges(ir_node *n)
+{
+ bitset_t *ba = get_backarray(n);
+ if (ba != NULL) {
+ bitset_clear_all(ba);
+ }
}
-/* TODO: add an ir_op operation */
-void new_backedge_info(ir_node *n) {
- switch(get_irn_opcode(n)) {
- case iro_Block:
- n->attr.block.cg_backedge = NULL;
- n->attr.block.backedge = new_backedge_arr(current_ir_graph->obst, get_irn_arity(n));
- break;
- case iro_Phi:
- n->attr.phi_backedge = new_backedge_arr(current_ir_graph->obst, get_irn_arity(n));
- break;
- case iro_Filter:
- n->attr.filter.backedge = new_backedge_arr(current_ir_graph->obst, get_irn_arity(n));
- break;
- default: ;
- }
+bitset_t *new_backedge_arr(struct obstack *obst, size_t size)
+{
+ return bitset_obstack_alloc(obst, size);
}
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