cfgrtl.c (try_redirect_by_replacing_jump): Allow redirect_jump to fail if target is EXIT_BLOCK_PTR, die otherwise.

	* cfgrtl.c (try_redirect_by_replacing_jump): Allow redirect_jump
	to fail if target is EXIT_BLOCK_PTR, die otherwise.
	(redirect_edge_and_branch): Likewise.
	* cfgcleanup.c (try_forward_edge): Don't force jump redirecting
	if target is EXIT_BLOCK_PTR.

	* gcc.c-torture/compile/20011229-2.c: New test.

From-SVN: r48399