On Tue, Jan 16, 2024 at 07:29:04PM -0800, Andrew Pinski wrote:
> So the problem here is that aarch64_ldp_reg_operand will all subreg even
> subreg of lo_sum.
> When LRA tries to fix that up, all things break. So the fix is to change the
> check to only
> allow reg and subreg of regs.
>
> Note the tendancy here is to use register_operand but that checks the mode of
> the register
> but we need to allow a mismatch modes for this predicate for now.
>
> Built and tested for aarch64-linux-gnu with no regressions
> (Also tested with the LD/ST pair pass back on).
>
> PR target/113221
>
> gcc/ChangeLog:
>
> * config/aarch64/predicates.md (aarch64_ldp_reg_operand): For subreg,
> only allow REG operands isntead of allowing all.
s/isntead/instead/
Otherwise I defer to AArch64 maintainers.
Jakub
