When there is the possibility that overflow may happen on the loop index,
a few optimizations would not happen. For example code:
foo (int *a, int *b, unsigned k, unsigned n)
{
while (++k != n)
a[k] = b[k] + 1;
}
For this code, if "l > n", overflow may happen. if "l < n" at begining,
it c
On 4/29/2021 3:50 AM, Jiufu Guo via Gcc-patches wrote:
When there is the possibility that overflow may happen on the loop index,
a few optimizations would not happen. For example code:
foo (int *a, int *b, unsigned k, unsigned n)
{
while (++k != n)
a[k] = b[k] + 1;
}
For this code, i
Hi!
On Thu, Apr 29, 2021 at 05:50:48PM +0800, Jiufu Guo wrote:
> When there is the possibility that overflow may happen on the loop index,
> a few optimizations would not happen. For example code:
>
> foo (int *a, int *b, unsigned k, unsigned n)
> {
> while (++k != n)
> a[k] = b[k] + 1;
>
On Thu, 29 Apr 2021, Jiufu Guo wrote:
> When there is the possibility that overflow may happen on the loop index,
> a few optimizations would not happen. For example code:
>
> foo (int *a, int *b, unsigned k, unsigned n)
> {
> while (++k != n)
> a[k] = b[k] + 1;
> }
>
> For this code, if
On 2021-05-01 00:27, Jeff Law wrote:
On 4/29/2021 3:50 AM, Jiufu Guo via Gcc-patches wrote:
When there is the possibility that overflow may happen on the loop
index,
a few optimizations would not happen. For example code:
foo (int *a, int *b, unsigned k, unsigned n)
{
while (++k != n)
On 2021-05-01 05:37, Segher Boessenkool wrote:
Hi!
On Thu, Apr 29, 2021 at 05:50:48PM +0800, Jiufu Guo wrote:
When there is the possibility that overflow may happen on the loop
index,
a few optimizations would not happen. For example code:
foo (int *a, int *b, unsigned k, unsigned n)
{
whil
On 2021-05-03 20:18, Richard Biener wrote:
On Thu, 29 Apr 2021, Jiufu Guo wrote:
When there is the possibility that overflow may happen on the loop
index,
a few optimizations would not happen. For example code:
foo (int *a, int *b, unsigned k, unsigned n)
{
while (++k != n)
a[k] = b[k]
On Thu, 6 May 2021, guojiufu wrote:
> On 2021-05-03 20:18, Richard Biener wrote:
> > On Thu, 29 Apr 2021, Jiufu Guo wrote:
> >
> >> When there is the possibility that overflow may happen on the loop index,
> >> a few optimizations would not happen. For example code:
> >>
> >> foo (int *a, int *b
On 2021-05-06 16:27, Richard Biener wrote:
On Thu, 6 May 2021, guojiufu wrote:
On 2021-05-03 20:18, Richard Biener wrote:
> On Thu, 29 Apr 2021, Jiufu Guo wrote:
>
>> When there is the possibility that overflow may happen on the loop index,
>> a few optimizations would not happen. For example c
On Fri, 7 May 2021, guojiufu wrote:
> On 2021-05-06 16:27, Richard Biener wrote:
> > On Thu, 6 May 2021, guojiufu wrote:
> >
> >> On 2021-05-03 20:18, Richard Biener wrote:
> >> > On Thu, 29 Apr 2021, Jiufu Guo wrote:
> >> >
> >> >> When there is the possibility that overflow may happen on the lo
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