PR testsuite/34168

[pf3gnuchains/gcc-fork.git] / gcc / tree-flow-inline.h

diff --git a/gcc/tree-flow-inline.h b/gcc/tree-flow-inline.h
index 7bc21b8..d8593bd 100644 (file)
--- a/gcc/tree-flow-inline.h
+++ b/gcc/tree-flow-inline.h
@@ -1725,7 +1725,30 @@ var_can_have_subvars (const_tree v)
   return false;
 }
 
-  
+
+/* Return true, if the two ranges [POS1, SIZE1] and [POS2, SIZE2]
+   overlap.  SIZE1 and/or SIZE2 can be (unsigned)-1 in which case the
+   range is open-ended.  Otherwise return false.  */
+
+static inline bool
+ranges_overlap_p (unsigned HOST_WIDE_INT pos1,
+                 unsigned HOST_WIDE_INT size1,
+                 unsigned HOST_WIDE_INT pos2,
+                 unsigned HOST_WIDE_INT size2)
+{
+  if (pos1 >= pos2
+      && (size2 == (unsigned HOST_WIDE_INT)-1
+         || pos1 < (pos2 + size2)))
+    return true;
+  if (pos2 >= pos1
+      && (size1 == (unsigned HOST_WIDE_INT)-1
+         || pos2 < (pos1 + size1)))
+    return true;
+
+  return false;
+}
+
+
 /* Return true if OFFSET and SIZE define a range that overlaps with some
    portion of the range of SV, a subvar.  If there was an exact overlap,
    *EXACT will be set to true upon return. */