Merge dataflow branch into mainline

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@125624 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 15 insertions, 1 deletions

diff --git a/gcc/sbitmap.c b/gcc/sbitmap.c
index a25bff4ba94..65a4686eff9 100644
--- a/gcc/sbitmap.c
+++ b/gcc/sbitmap.c
@@ -1,5 +1,6 @@
 /* Simple bitmaps.
-   Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -262,6 +263,19 @@ sbitmap_equal (sbitmap a, sbitmap b)
   return !memcmp (a->elms, b->elms, sizeof (SBITMAP_ELT_TYPE) * a->size);
 }
 
+/* Return true if the bitmap is empty.  */
+
+bool
+sbitmap_empty_p (sbitmap bmap)
+{
+  unsigned int i;
+  for (i=0; i<bmap->size; i++)
+    if (bmap->elms[i])
+      return false;
+
+  return true;
+}
+
 /* Zero all elements in a bitmap.  */
 
 void