* mips.md (divmodsi4*, divmoddi4*, udivmodsi4*, udivmoddi4): Add -mcheck-range-division/
-mcheck-zero-division checking.  Avoid as macro expansion.  Use hi/lo as destination
register.
(div_trap): New.
(divsi3*, divdi3*, modsi3*, moddi3*, udivsi3*, udivdi3*, umodsi3*,
umoddi3*): Add -mcheck-range-division/-mcheck-zero-division checking.
Avoid as macro expansion.  Use hi/lo as destination register.
* mips.h (MASK_CHECK_RANGE_DIV): New.
(MASK_NO_CHECK_ZERO_DIV): New.
(ELIMINABLE_REGS): Added GP_REG_FIRST + 31.
(CAN_ELIMINATE, INITIAL_ELIMINATION_OFFSET): Allow for getting
return address for leaf functions out of r31 to support
builtin_return_address.

From-SVN: r24047