re PR tree-optimization/48975 (ICE in execute_cse_reciprocals() with -fno-tree-slp-vectorize)

	PR tree-optimization/48975
	* tree-if-conv.c (combine_blocks): Call free_bb_predicate
	on all bbs here and free and clear ifc_bbs at the end.

	* gcc.dg/pr48975.c: New test.

From-SVN: r173709

gcc/ChangeLog

+2011-05-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/48975
+	* tree-if-conv.c (combine_blocks): Call free_bb_predicate
+	on all bbs here and free and clear ifc_bbs at the end.
+
 2011-05-12  Richard Guenther  <rguenther@suse.de>
 
 	* gimple.c (gtc_visit): Compare TREE_ADDRESSABLE, handle

gcc/testsuite/ChangeLog

+2011-05-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/48975
+	* gcc.dg/pr48975.c: New test.
+
 2011-05-12  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/48972

gcc/testsuite/gcc.dg/pr48975.c

+/* PR tree-optimization/48975 */
+/* { dg-do compile } */
+/* { dg-options "-O3 -ffast-math -fno-tree-slp-vectorize" } */
+
+static int
+foo (int x)
+{
+  return (x > 0) ? 0 : x + 1;
+}
+
+void
+bar (unsigned int x)
+{
+  int l = 1;
+lab:
+  while (x)
+    x = foo (x);
+}

gcc/tree-if-conv.c

 /* If-conversion for vectorizer.
-   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
+   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
    Contributed by Devang Patel <dpatel@apple.com>
 
@@ -1637,6 +1637,7 @@ combine_blocks (struct loop *loop)
   for (i = 0; i < orig_loop_num_nodes; i++)
     {
       bb = ifc_bbs[i];
+      free_bb_predicate (bb);
       if (bb_with_exit_edge_p (loop, bb))
 	{
 	  exit_bb = bb;
@@ -1712,6 +1713,9 @@ combine_blocks (struct loop *loop)
       && exit_bb != loop->header
       && can_merge_blocks_p (loop->header, exit_bb))
     merge_blocks (loop->header, exit_bb);
+
+  free (ifc_bbs);
+  ifc_bbs = NULL;
 }
 
 /* If-convert LOOP when it is legal.  For the moment this pass has no