[PATCH v2] gas: equates of registers

[Jan Beulich]

On 03.05.2023 01:37, Hans-Peter Nilsson wrote:
> On Tue, 2 May 2023, Jan Beulich wrote:
> 
>> There are two problems: symbol_equated_p() doesn't recognize equates of
>> registers, and S_CAN_BE_REDEFINED() goes by section rather than by
>> expression type. Both together undermine .eqv and .equiv clearly meaning
>> to guard the involved symbols against re-definition (both ways).
>>
>> To compensate pseudo_set() now using O_symbol and S_CAN_BE_REDEFINED()
>> now checking for O_register,
>> - for targets creating register symbols through symbol_{new,create}() ->
>>   symbol_init() -> S_SET_VALUE() (alpha, arc, dlx, ia64, m68k, mips,
>>   mmix, tic4x, tic54x, plus anything using cgen or itbl-ops), have
>>   symbol_init() set their expressions to O_register,
> 
> (Heads-up for maintainers or asking for approval though being a 
> global maintainer?  Anyway...)

Well, I'd prefer to have arch maintainer agreement, but I wouldn't wait
indefinitely with a change like this one.

> Ok for mmix iff the binutils test-suites (ld, gas, binutils) 
> shows no regressions for mmix with this patch.

Thanks; no regressions seen here.

Jan