flags.h (flag_optimize_sibling_calls): Declare.

	* flags.h (flag_optimize_sibling_calls): Declare.
	* calls.c (expand_call): Fail sibcall when
	!flag_optimize_sibling_calls
	* invoke.texi (flag_optimize_sibling_calls): Document.
	* toplev.c (flag_optimize_sibling_calls): New global variable.
	(f_options): Add flag_optimize_sibling_calls.
	(rest_of_compilation): Conditionize
	optimize_sibling_and_tail_recursive_calls by
	flag_optimize_sibling_calls.
	(main): Set flag_optimize_sibling_calls for -O2.
	* stmt.c (expand_return): Conditionize tail recursion by
	flag_optimize_sibling_calls.

From-SVN: r32802

1 files changed, 1 insertions, 1 deletions

diff --git a/gcc/stmt.c b/gcc/stmt.c
index 88d665e..f807554 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -2872,7 +2872,7 @@ expand_return (retval)
     }
 
   /* Attempt to optimize the call if it is tail recursive.  */
-  if (optimize
+  if (flag_optimize_sibling_calls
       && retval_rhs != NULL_TREE
       && frame_offset == 0
       && TREE_CODE (retval_rhs) == CALL_EXPR