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<body><span class="vcard"><a class="email" href="mailto:davide@freebsd.org" title="Davide Italiano <davide@freebsd.org>"> <span class="fn">Davide Italiano</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Loop Vectorizer does not recognize packed load"
href="https://bugs.llvm.org/show_bug.cgi?id=35878">bug 35878</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>davide@freebsd.org
</td>
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<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Loop Vectorizer does not recognize packed load"
href="https://bugs.llvm.org/show_bug.cgi?id=35878#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Loop Vectorizer does not recognize packed load"
href="https://bugs.llvm.org/show_bug.cgi?id=35878">bug 35878</a>
from <span class="vcard"><a class="email" href="mailto:davide@freebsd.org" title="Davide Italiano <davide@freebsd.org>"> <span class="fn">Davide Italiano</span></a>
</span></b>
<pre>Your program exhibits UB, as you're missing a `return`.
Change it to:
#include <cstdint>
int foo(uint32_t* __restrict r, uint32_t* __restrict ptr)
{
for (int j = 0; j < 8; ++j)
r[j] = *(ptr++);
return 0;
}
And you get:
foo(unsigned int*, unsigned int*): # @foo(unsigned int*, unsigned int*)
vmovups ymm0, ymmword ptr [rsi]
vmovups ymmword ptr [rdi], ymm0
xor eax, eax
vzeroupper
ret
which is a vectorized sequence.</pre>
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