On Mon, 23 Nov 2020, Jakub Jelinek wrote:
> Hi!
>
> The PR38359 change made the -1 >> x to -1 optimization less useful by
> requiring that the x must be non-negative.
> Shifts by negative amount are UB, but we for historic reasons had in some
> (but not all) places some hack to treat shifts by
Hi!
The PR38359 change made the -1 >> x to -1 optimization less useful by
requiring that the x must be non-negative.
Shifts by negative amount are UB, but we for historic reasons had in some
(but not all) places some hack to treat shifts by negative value as the
other direction shifts by the
