On 11/5/18 7:44 AM, Richard Biener wrote:
>
> The PR18041 testcase is about bitfield insertion of the style
>
> b->bit |= <...>
>
> where the RMW cycle we end up generating contains redundant
> masking and ORing of the original b->bit value. The following
> adds a combine pattern in simplify-r
The PR18041 testcase is about bitfield insertion of the style
b->bit |= <...>
where the RMW cycle we end up generating contains redundant
masking and ORing of the original b->bit value. The following
adds a combine pattern in simplify-rtx to specifically match
(X & C) | ((X | Y) & ~C)
and
