Re: [PATCH 3/3] VAX: Handle subtracting from self with QMATH DImode add/sub

[Jeff Law via Gcc-patches]

On 12/11/20 1:48 PM, Maciej W. Rozycki wrote:
> Remove an assertion the failure of which has not been actually observed, 
> but which appears clearly dangerous, for when the QMATH DImode add/sub 
> handler is invoked with the subtrahend and the minuend both the same.
> Instead handle the operation by emitting a move of constant 0 to the 
> output operand.  Adjust the relevant inline comment accordingly.
>
>       gcc/
>       * config/vax/vax.c (vax_expand_addsub_di_operands): Handle equal
>       input operands with subtraction.
OK
jeff