2002-04-23  Roger Sayle  <roger@eyesopen.com>

	* builtins.c (builtin_memset_gen_str): New function.
	(expand_builtin_memset): Optimize the case of constant length, but
	unknown value.
testsuite:
	* gcc.c-torture/execute/string-opt-17.c: New test case.
	* gcc.c-torture/execute/memset-2.c: New test case.

From-SVN: r52662