tree-tailcall.c (find_tail_calls): Don't use tail-call recursion for built-in functions.

tree-tailcall.c (find_tail_calls): Don't use tail-call recursion for built-in functions.

gcc/
2013-10-15  Richard Biener  <rguenther@suse.de>

	* tree-tailcall.c (find_tail_calls): Don't use tail-call recursion
	for built-in functions.

gcc/testsuite/
	* gcc.dg/torture/builtin-self.c: New file.

libgcc/
	* sync.c: Remove static aliases and define each function directly
	under its real name.

From-SVN: r203628