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<p>I've reported this here:
<a class="moz-txt-link-freetext" href="https://bugs.llvm.org/show_bug.cgi?id=51103">https://bugs.llvm.org/show_bug.cgi?id=51103</a></p>
<div class="moz-cite-prefix">On 15/07/2021 04:04, Ryan Taylor via
llvm-dev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABgVvXvT+NdbVyXbON57XqPfLUcRejCtEJVn8PCvokkpbiXNAA@mail.gmail.com">
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<div dir="ltr">Given a test case:
<div><br>
</div>
<div>#define N 10<br>
struct foo {<br>
float a[N][N];<br>
float b[N];<br>
};<br>
<br>
void compute(struct foo *p)<br>
{<br>
for (int i = 0; i < N; i++) {<br>
for (int j = 0; j < N; j++) {<br>
p->a[i][j] += 0.1f * p->b[i];<br>
}<br>
}<br>
}<br>
</div>
<div><br>
</div>
<div>LLVM isn't able to vectorize this code. I'm not sure what
the issue is here as it seems to vectorize this code:</div>
<div><br>
</div>
<div>#define N 10<br>
struct foo {<br>
float a[N];<br>
float b[N];<br>
};<br>
<br>
void compute(struct foo *p)<br>
{<br>
for (int i = 0; i < N; i++) {<br>
p->a[i] += 0.1f * p->b[i];<br>
}<br>
}<br>
</div>
<div><br>
</div>
<div>Is this a known issue?</div>
<div><br>
</div>
<div>-Ryan</div>
</div>
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</pre>
</blockquote>
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