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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [mc] V_*QSAD_PK_* to check that dest register is different than any of the src"
href="https://bugs.llvm.org/show_bug.cgi?id=33279">33279</a>
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<th>Summary</th>
<td>[mc] V_*QSAD_PK_* to check that dest register is different than any of the src
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: AMDGPU
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<th>Assignee</th>
<td>dpreobrazhensky@luxoft.com
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<th>Reporter</th>
<td>artem.tamazov@amd.com
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<th>CC</th>
<td>andrey.kasaurov@gmail.com, artem.tamazov@amd.com, llvm-bugs@lists.llvm.org, Matthew.Arsenault@amd.com, nikolay.haustov@amd.com, sam.kolton@amd.com, valery.pykhtin@gmail.com
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<pre>Quote from [<a href="https://reviews.llvm.org/D33783">https://reviews.llvm.org/D33783</a>]:
The V_MQSAD_PK_U16_U8, V_QSAD_PK_U16_U8, and V_MQSAD_U32_U8 take more than 1
pass in hardware. For these three instructions, the destination registers must
be different than all sources so that the first pass does not overwrite sources
for the following passes.
It seems that we have missed that check in the assembler.
Perhaps TestGen also needs to be updated.</pre>
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