Displaying 10 results from an estimated 10 matches for "reachanadi".
2013 Apr 11
2
[LLVMdev] Decouple LoopVectorizer from O3
...i=SIZE;i > 0;i--) {
> aa[i] = bb[i] + count;
> count++;
> }
> }
>
>
> Thanks,
> Nadav
>
> The loop vectorizer has some LSR-like capabilities for merging multiple
> induction variables into a
>
>
> On Apr 10, 2013, at 7:52 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
>
> Hi Nadav,
>
> I tried your suggestion by changing the condition to :
>
> 189 if (LoopVectorize && OptLevel >= 0)
> 190 MPM.add(createLoopVectorizePass());
>
> and compiled. Then I used the following command:
>
> opt -mtri...
2013 Apr 15
0
[LLVMdev] Decouple LoopVectorizer from O3
Just an FYI: it's often handy to mention the PR number when a thread is
concluded by filing a bug. That way other people reading (now, or more
importantly, later) can follow the issue through to the bug and its
resolution
On Apr 11, 2013 4:24 PM, "Anadi Mishra" <reachanadi at gmail.com> wrote:
> Done.
>
> Best,
> Anadi.
>
>
> On Thu, Apr 11, 2013 at 7:01 AM, Nadav Rotem <nrotem at apple.com> wrote:
> > Hi Anadi,
> >
> > Yes, this is a bug in the loop vectorizer. The loop vectorizer expects
> only
> > one loop...
2013 Apr 11
2
[LLVMdev] Decouple LoopVectorizer from O3
...; In the file PassManagerBuilder.cpp you can change the lines below to get rid of the O3 restriction.
>
> 189 if (LoopVectorize && OptLevel > 2)
> 190 MPM.add(createLoopVectorizePass());
>
> Nadav
>
>
>
>
> On Apr 10, 2013, at 5:39 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
>
> Hello,
>
> I am trying out the LoopVectorizer(LV) pass and would like to decouple it from O3 which is currently required to run LV. I want to do this because I want to understand the behaviour of LV by trying simple loops but the O3 mostly optimises away the...
2013 Apr 11
0
[LLVMdev] Decouple LoopVectorizer from O3
...foo(int *aa, int *bb, int SIZE) {
int count = 190;
for(int i=SIZE;i > 0;i--) {
aa[i] = bb[i] + count;
count++;
}
}
Thanks,
Nadav
The loop vectorizer has some LSR-like capabilities for merging multiple induction variables into a
On Apr 10, 2013, at 7:52 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
> Hi Nadav,
>
> I tried your suggestion by changing the condition to :
>
> 189 if (LoopVectorize && OptLevel >= 0)
> 190 MPM.add(createLoopVectorizePass());
>
> and compiled. Then I used the following command:
>
> opt -mtri...
2013 Apr 11
4
[LLVMdev] Decouple LoopVectorizer from O3
Hello,
I am trying out the LoopVectorizer(LV) pass and would like to decouple it
from O3 which is currently required to run LV. I want to do this because I
want to understand the behaviour of LV by trying simple loops but the O3
mostly optimises away the loop body.
Any ideas would be appreciated.
Best,
Anadi.
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2013 Apr 11
1
[LLVMdev] Decouple LoopVectorizer from O3
...es get run. It may take some fiddling to find out
> the pass sequence and ordering that does what you want, as some passes rely
> on previous passes to canonicaplize code into a form it can effectively
> work with.
>
> -Jim
>
>
> On Apr 10, 2013, at 5:39 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
>
> Hello,
>
> I am trying out the LoopVectorizer(LV) pass and would like to decouple it
> from O3 which is currently required to run LV. I want to do this because I
> want to understand the behaviour of LV by trying simple loops but the O3
> mostly opti...
2013 Apr 11
0
[LLVMdev] Decouple LoopVectorizer from O3
...ve complete flexibility in which passes get run. It may take some fiddling to find out the pass sequence and ordering that does what you want, as some passes rely on previous passes to canonicaplize code into a form it can effectively work with.
-Jim
On Apr 10, 2013, at 5:39 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
> Hello,
>
> I am trying out the LoopVectorizer(LV) pass and would like to decouple it from O3 which is currently required to run LV. I want to do this because I want to understand the behaviour of LV by trying simple loops but the O3 mostly optimises away the loo...
2013 Apr 11
0
[LLVMdev] Decouple LoopVectorizer from O3
Hi Anadi,
In the file PassManagerBuilder.cpp you can change the lines below to get rid of the O3 restriction.
189 if (LoopVectorize && OptLevel > 2)
190 MPM.add(createLoopVectorizePass());
Nadav
On Apr 10, 2013, at 5:39 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
> Hello,
>
> I am trying out the LoopVectorizer(LV) pass and would like to decouple it from O3 which is currently required to run LV. I want to do this because I want to understand the behaviour of LV by trying simple loops but the O3 mostly optimises away the loo...
2013 Apr 17
1
[LLVMdev] Loop vectorizer behaviour for 2D arrays and parallel annotation
On Wed, Apr 17, 2013 at 8:08 AM, Tobias Grosser <tobias at grosser.es> wrote:
> On 04/17/2013 04:55 AM, Anadi Mishra wrote:
>>
>> Hello,
>>
>> I am trying to vectorize the following loop but the vectorizer says:
>> "Found a possible write-write reorder" and does not vectorize.
>> Why?
>
>
> To my knowledge, the dependence analysis in
2013 Apr 17
4
[LLVMdev] Loop vectorizer behaviour for 2D arrays and parallel annotation
Hello,
I am trying to vectorize the following loop but the vectorizer says:
"Found a possible write-write reorder" and does not vectorize.
Why?
for (j=0; j < 8; j++)
{
jj = j << 3;
m2[j][0] = diff[jj ] + diff[jj+4];
m2[j][1] = diff[jj+1] + diff[jj+5];
m2[j][2] = diff[jj+2] + diff[jj+6];
m2[j][3] = diff[jj+3] + diff[jj+7];
m2[j][4] = diff[jj ] -