Ranger: More efficient zero/nonzero check.

A recent change introduced a frequent check for zero and non-zero which has
caused a lot of extra temporary trees to be created.  Make the check more
efficent as it is always a pointer and thus unsigned.

	* gimple-range-cache.cc (non_null_ref::adjust_range): Check for
	zero and non-zero more efficently.

diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc
index 61043d3f37507056e4618f76c2124aede3169c71..91dd5a5c0871e9deadcd6c405f6f56a6c84f556b 100644 (file)
--- a/gcc/gimple-range-cache.cc
+++ b/gcc/gimple-range-cache.cc
@@ -98,9 +98,10 @@ non_null_ref::adjust_range (irange &r, tree name, basic_block bb,
     return false;
 
   // We only care about the null / non-null property of pointers.
-  if (!POINTER_TYPE_P (TREE_TYPE (name)) || r.zero_p () || r.nonzero_p ())
+  if (!POINTER_TYPE_P (TREE_TYPE (name)))
+    return false;
+  if (r.undefined_p () || r.lower_bound () != 0 || r.upper_bound () == 0)
     return false;
-
   // Check if pointers have any non-null dereferences.
   if (non_null_deref_p (name, bb, search_dom))
     {