Fix off-by-one storage problem in irange_allocator.

gcc/ChangeLog:

	* value-range.h (irange_allocator::allocate): Increase
	newir storage by one.

diff --git a/gcc/value-range.h b/gcc/value-range.h
index 94b48e55e778cd6842ee080b7c55fa260ac64801..7031a8231383671f57e7be174a8cdf1d8e014f0d 100644 (file)
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -670,7 +670,7 @@ irange_allocator::allocate (unsigned num_pairs)
 
   struct newir {
     irange range;
-    tree mem[1];
+    tree mem[2];
   };
   size_t nbytes = (sizeof (newir) + sizeof (tree) * 2 * (num_pairs - 1));
   struct newir *r = (newir *) obstack_alloc (&m_obstack, nbytes);