target.def (preferred_output_reload_class): New hook.
* target.def (preferred_output_reload_class): New hook.
* doc/tm.texi.in (TARGET_PREFERRED_OUTPUT_RELOAD_CLASS): Document.
* doc/tm.texi: Regenerate.
* targhooks.c (default_preferred_output_reload_class): New function.
* targhooks.h (default_preferred_output_reload_class): Declare.
* reload.c (find_dummy_reload): Change rclass argument type from
enum reg_class to reg_class_t. Change this_alternative array type
from enum reg_class to reg_class_t.
Use TARGET_PREFERRED_OUTPUT_RELOAD_CLASS target hook.
(push_reload): Change preferred_class variable type to reg_class_t.
Use TARGET_PREFERRED_OUTPUT_RELOAD_CLASS target hook.
* recog.c (reg_fits_class_p): Change result type to bool. Change cl
argument type from enum reg_class to reg_class_t. Use
HARD_REGISTER_NUM_P predicate.
* recog.h (reg_fits_class_p): Update prototype.
* config/i386/i386.h (PREFERRED_OUTPUT_RELOAD_CLASS): Remove.
* config/i386/i386-protos.h (ix86_preferred_output_reload_class): Remove.
* config/i386/i386.c (ix86_preferred_output_reload_class): Make
static. Change regclass argument and result types from enum reg_class
to reg_class_t.
(TARGET_PREFERRED_OUTPUT_RELOAD_CLASS): Define.