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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Not able to vectorize struct members"
href="https://bugs.llvm.org/show_bug.cgi?id=51103">51103</a>
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<th>Summary</th>
<td>Not able to vectorize struct members
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>a.bataev@hotmail.com, florian_hahn@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Reported here: <a href="https://lists.llvm.org/pipermail/llvm-dev/2021-July/151796.html">https://lists.llvm.org/pipermail/llvm-dev/2021-July/151796.html</a>
#define N 10
struct foo {
float a[N][N];
float b[N];
};
void compute(struct foo *p)
{
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
p->a[i][j] += 0.1f * p->b[i];
}
}
}
LLVM isn't able to vectorize this code. I'm not sure what the issue is here
as it seems to vectorize this code:
#define N 10
struct foo {
float a[N];
float b[N];
};
void compute(struct foo *p)
{
for (int i = 0; i < N; i++) {
p->a[i] += 0.1f * p->b[i];
}
}
Current Codegen: <a href="https://llvm.godbolt.org/z/nah3ov9fT">https://llvm.godbolt.org/z/nah3ov9fT</a></pre>
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