make iq2000 use constraints.md
* config/iq2000/i2000.h (REG_CLASS_FROM_LETTER): Delete.
(CONST_OK_FOR_LETTER_P, CONST_DOUBLE_OK_FOR_LETTER_P): Delete.
(EXTRA_CONSTRAINT): Delete.
* config/iq2000/constraints.md: New file.
* config/iq2000/iq2000.md: Include it.
(define_insn ""): Delete.
(movsi_internal2, movhi_internal2, movqi_internal2): Delete
unsupported constraint letters from patterns.
(call_value, call_value_internal1): Likewise.
(call_value_multiple_internal1): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170184
138bc75d-0d04-0410-961f-
82ee72b054a4