* 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.
From-SVN: r141431
