(shorten_compare): When simplify compare against

zero, check for restype_ptr unsigned instead of primop0 unsigned.

From-SVN: r6806

diff --git a/gcc/c-common.c b/gcc/c-common.c
index ec60a5f..868a18b 100644 (file)
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -1651,7 +1651,7 @@ shorten_compare (op0_ptr, op1_ptr, restype_ptr, rescode_ptr)
       primop1 = op1;
 
       if (!real1 && !real2 && integer_zerop (primop1)
-         && TREE_UNSIGNED (TREE_TYPE (primop0)))
+         && TREE_UNSIGNED (*restype_ptr))
        {
          tree value = 0;
          switch (code)