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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AArch64] Incorrect result for vector conversion with -O2"
href="https://bugs.llvm.org/show_bug.cgi?id=45541">45541</a>
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<th>Summary</th>
<td>[AArch64] Incorrect result for vector conversion with -O2
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>10.0
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>clang@evan.coeusgroup.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23358" name="attach_23358" title="Test case">attachment 23358</a> <a href="attachment.cgi?id=23358&action=edit" title="Test case">[details]</a></span>
Test case
The attached test case works on without optimization and on GCC, but fails with
-O2 (`clang-10 -v -target aarch64-linux-gnu -O2 -o mm_cvtepu8_epi16
mm_cvtepu8_epi16.c` to be precise).
I've added a FOO preprocessor macro (see line 27) to switch between making
simde__m128i a typedef to int64x2_t and int32x4_t. Depending on which is used
different functions fail. It shouldn't actually matter since the code uses
__builtin_memcpy to convert to/from simde__m128i_private and simde__m128i.</pre>
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