X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firbackedge.c;h=a049e73c72afe8e8afadca76d50ec2cc62ca859d;hb=6b1241844320899c9c3f175a81a274fcbdd5be27;hp=8a39fe23e9ea705b93b2c6a32876386408674b1d;hpb=33c43f10971f7e365c3ef03861ff0308294dbf97;p=libfirm

diff --git a/ir/ana/irbackedge.c b/ir/ana/irbackedge.c
index 8a39fe23e..a049e73c7 100644
--- a/ir/ana/irbackedge.c
+++ b/ir/ana/irbackedge.c
@@ -1,19 +1,36 @@
 /*
- * 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) 1995-2008 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.
  */
 
+/**
+ * @file
+ * @brief     Access function for backedges.
+ * @author    Goetz Lindenmaier
+ * @date      7.2002
+ * @version   $Id$
+ */
+#include "config.h"
+
 #include "irnode_t.h"
 #include "irgraph_t.h"
 #include "array.h"
 #include "irbackedge_t.h"
+#include "raw_bitset.h"
 
 /*--------------------------------------------------------------------*/
 /* Backedge information.                                              */
@@ -27,154 +44,202 @@
  * 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 unsigned *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.u.backedge && "backedge array not allocated!");
+		return n->attr.phi.u.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;
 }
 
 /**
  * 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");
-  }
-
-  return ba;
+static unsigned *get_backarray(ir_node *n)
+{
+	unsigned *ba = mere_get_backarray(n);
+
+#ifndef NDEBUG
+	if (ba) {
+		int bal = rbitset_size(ba);  /* avoid macro expansion in assertion. */
+		int inl = get_irn_arity(n);
+		assert(bal == inl && "backedge array with faulty length");
+	}
+#endif
+
+	return ba;
 }
 
+#ifndef NDEBUG
 /**
- * Returns true if node has no backarray, or
- *              if size of backarray == size of in array.
+ * Returns non-zero if node has no backarray, or
+ *                  if size of backarray == size of in array.
  */
-static INLINE bool 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 false;
-  return true;
+static int legal_backarray(ir_node *n)
+{
+	unsigned *ba = mere_get_backarray(n);
+	if (ba && (rbitset_size(ba) != (unsigned) get_irn_arity(n)))
+		return 0;
+	return 1;
 }
-
-
-void fix_backedges(struct obstack *obst, ir_node *n) {
-  opcode opc = get_irn_opcode(n);
-  int *arr = mere_get_backarray(n);
-  if (ARR_LEN(arr) == ARR_LEN(get_irn_in(n))-1)
-    return;
-  if (ARR_LEN(arr) != ARR_LEN(get_irn_in(n))-1) {
-    arr = new_backedge_arr(obst, ARR_LEN(get_irn_in(n))-1);
-    if (opc == iro_Phi)    n->attr.phi_backedge = arr;
-    if ((opc == iro_Block) && !get_interprocedural_view())
-      n->attr.block.backedge = arr;
-    if ((opc == iro_Block) && get_interprocedural_view())
-      n->attr.block.cg_backedge = arr;
-    if (opc == iro_Filter) n->attr.filter.backedge = arr;
-    return;
-  }
-  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);
-  }*/
+#endif
+
+void fix_backedges(struct obstack *obst, ir_node *n)
+{
+	unsigned *arr = mere_get_backarray(n);
+	ir_opcode opc;
+	int arity;
+
+	if (! arr)
+		return;
+
+	arity = get_irn_arity(n);
+	if (rbitset_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) {
+			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));
 }
 
-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;
+#ifdef INTERPROCEDURAL_VIEW
+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;
+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;
 }
+#endif
 
 
-/** Returns true if the predecessor pos is a backedge. */
-bool is_backedge (ir_node *n, int pos) {
-  int *ba = get_backarray (n);
-  if (ba) return ba[pos];
-  return false;
+/* Returns non-zero if the predecessor pos is a backedge. */
+int is_backedge(ir_node *n, int pos)
+{
+	unsigned *ba = get_backarray(n);
+	if (ba)
+		return rbitset_is_set(ba, pos);
+	return 0;
 }
 
-/** 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;
+/* Remarks that edge pos is a backedge. */
+void set_backedge(ir_node *n, int pos)
+{
+	unsigned *ba = get_backarray(n);
+	assert(ba && "can only set backedges at Phi, Filter, Block nodes.");
+	rbitset_set(ba, pos);
 }
 
-/** 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;
+/* Remarks that edge pos is a backedge. */
+void set_not_backedge(ir_node *n, int pos)
+{
+	unsigned *ba = get_backarray(n);
+	assert(ba && "can only set backedges at Phi, Filter, Block nodes.");
+	rbitset_clear(ba, pos);
 }
 
-/** Returns true if n has backedges. */
-bool 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 true;
-  }
-  return false;
+/* Returns non-zero if n has backedges. */
+int has_backedges(ir_node *n)
+{
+	unsigned *ba = get_backarray(n);
+	if (ba) {
+		int arity = get_irn_arity(n);
+		return !rbitset_is_empty(ba, arity);
+	}
+	return 0;
 }
 
 /** 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(false);
-  ba = get_backarray (n);
-  if (ba) {
-    arity = get_irn_arity(n);
-    for (i = 0; i < arity; i++)
-      ba[i] = 0;
-  }
-  set_interprocedural_view(true);
-  ba = get_backarray (n);
-  if (ba) {
-    arity = get_irn_arity(n);
-    for (i = 0; i < arity; i++)
-      ba[i] = 0;
-  }
-  set_interprocedural_view(rem);
+void clear_backedges(ir_node *n)
+{
+	int i, arity;
+	unsigned *ba;
+#ifdef INTERPROCEDURAL_VIEW
+	int rem = get_interprocedural_view();
+	set_interprocedural_view(0);
+#endif
+	ba = get_backarray(n);
+	if (ba) {
+		arity = get_irn_arity(n);
+		for (i = 0; i < arity; i++)
+			rbitset_clear(ba, i);
+	}
+#ifdef INTERPROCEDURAL_VIEW
+	set_interprocedural_view(1);
+	ba = get_backarray (n);
+	if (ba) {
+		arity = get_irn_arity(n);
+		for (i = 0; i < arity; i++)
+			rbitset_clear(ba, i);
+	}
+	set_interprocedural_view(rem);
+#endif
+}
+
+/* Allocate a new backedge array on the obstack for given size. */
+unsigned *new_backedge_arr(struct obstack *obst, unsigned size)
+{
+	return rbitset_w_size_obstack_alloc(obst, size);
+}
+
+/* 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.u.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: ;
+	}
 }