Hi,
Thanks for your comments!
Segher Boessenkool writes:
> Hi!
>
> On Wed, Jun 07, 2023 at 04:21:11PM +0800, Jiufu Guo wrote:
>> This patch tries to optimize "(X - N * M) / N" to "X / N - M".
>> For C code, "/" towards zero (trunc_div), and "X - N * M" maybe
>> wrap/overflow/underflow. So, it
Hi!
On Wed, Jun 07, 2023 at 04:21:11PM +0800, Jiufu Guo wrote:
> This patch tries to optimize "(X - N * M) / N" to "X / N - M".
> For C code, "/" towards zero (trunc_div), and "X - N * M" maybe
> wrap/overflow/underflow. So, it is valid that "X - N * M" does
> not cross zero and does not wrap/over
Hi,
Richard Biener writes:
> On Wed, 7 Jun 2023, Jiufu Guo wrote:
>
>> Hi,
>>
>> This patch tries to optimize "(X - N * M) / N" to "X / N - M".
>> For C code, "/" towards zero (trunc_div), and "X - N * M" maybe
>> wrap/overflow/underflow. So, it is valid that "X - N * M" does
>> not cross zer
On Wed, 7 Jun 2023, Jiufu Guo wrote:
> Hi,
>
> This patch tries to optimize "(X - N * M) / N" to "X / N - M".
> For C code, "/" towards zero (trunc_div), and "X - N * M" maybe
> wrap/overflow/underflow. So, it is valid that "X - N * M" does
> not cross zero and does not wrap/overflow/underflow.
>
Hi,
This patch tries to optimize "(X - N * M) / N" to "X / N - M".
For C code, "/" towards zero (trunc_div), and "X - N * M" maybe
wrap/overflow/underflow. So, it is valid that "X - N * M" does
not cross zero and does not wrap/overflow/underflow.
Compare with previous version:
https://gcc.gnu.org
