* config/bfin/bfin-protos.h (WA_05000257, WA_05000283, WA_05000315,

	* config/bfin/bfin-protos.h (WA_05000257, WA_05000283, WA_05000315,
	ENABLE_WA_05000257, ENABLE_WA_05000283, ENABLE_WA_05000315): New.
	* config/bfin/bfin.c (bfin_cpus): Add these workaround bits as
	appropriate.
	(must_save_p): For some workarounds, interrupts need to clobber a
	P register.
	(expand_prologue_reg_save, expand_epilogue_reg_restore): Save LC0
	and LC1 for WA_05000257.
	(expand_interrupt_handler_prologue): Add dummy read of CHIPID for
	WA_05000283 and WA_05000315.
	* config/bfin/bfin.md (UNSPEC_VOLATILE_DUMMY): New constant.
	(movbi): Add alternative to set CC to 1; improve code for setting
	CC to 0.
	(dummy_load): New pattern.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@141431 138bc75d-0d04-0410-961f-82ee72b054a4