Warning fixes:

	* builtins.c (expand_builtin_memcmp, expand_builtin_strcmp): Wrap
	prototypes in macro HAVE_cmpstrsi.

	* cpplib.c (cpp_get_token): Remove unused label `op3'.

	* emit-rtl.c (operand_subword): Remove unused variable
	`bits_per_word'.

	* rtl.c (shallow_copy_rtx): Remove unused variable `format_ptr'.

	* tree.c (chainon): Wrap variable `t2' in macro ENABLE_CHECKING.

From-SVN: r28514

1 files changed, 2 insertions, 0 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index f0dc0ee..9ab2fea 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1950,7 +1950,9 @@ chainon (op1, op2)
   if (op1)
     {
       register tree t1;
+#ifdef ENABLE_CHECKING
       register tree t2;
+#endif
 
       for (t1 = op1; TREE_CHAIN (t1); t1 = TREE_CHAIN (t1))
 	;