On April 13, 2018 9:33:31 PM GMT+02:00, Eric Botcazou
wrote:
>> 2018-04-13 Jakub Jelinek
>>
>> PR rtl-optimization/85376
>> * simplify-rtx.c (simplify_const_unary_operation): For CLZ and CTZ
>and
>> zero op0, if
On Fri, Apr 13, 2018 at 12:33:02AM +0200, Jakub Jelinek wrote:
> The following patch let us punt in these cases. Bootstrapped/regtested on
> x86_64-linux and i686-linux, ok for trunk?
>
> Another option would be to tweak simplify-rtx.c and instead of doing
> else if (!
> 2018-04-13 Jakub Jelinek
>
> PR rtl-optimization/85376
> * simplify-rtx.c (simplify_const_unary_operation): For CLZ and CTZ and
> zero op0, if C?Z_DEFINED_VALUE_AT_ZERO is false, return NULL_RTX
> instead of a specific value.
>
> *