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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [mc][gfx9+]"
href="https://bugs.llvm.org/show_bug.cgi?id=33169">33169</a>
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<th>Summary</th>
<td>[mc][gfx9+]
</td>
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<th>Product</th>
<td>libraries
</td>
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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>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AMDGPU
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>artem.tamazov@amd.com
</td>
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<th>CC</th>
<td>andrey.kasaurov@gmail.com, artem.tamazov@amd.com, dpreobrazhensky@luxoft.com, i.am.perminov@gmail.com, kzhuravl_dev@outlook.com, llvm-bugs@lists.llvm.org, Matthew.Arsenault@amd.com, nikolay.haustov@amd.com, sam.kolton@amd.com, Tony.Tye@amd.com, valery.pykhtin@gmail.com, yaxun.liu@amd.com
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<pre>Created <span class=""><a href="attachment.cgi?id=18509" name="attach_18509" title="regressed lit tests - r301646_regr.zip">attachment 18509</a> <a href="attachment.cgi?id=18509&action=edit" title="regressed lit tests - r301646_regr.zip">[details]</a></span>
regressed lit tests - r301646_regr.zip
45 regressions found during AMDGPU asm weekly testing 28 Apr 2017
(300997->301646].
Examples of failing instructions:
<span class="quote">> v_pk_fma_f16 v5, s1, v0, 0
> v_pk_fma_f16 v5, v1, 0, 0</span >
As of r303147, such insns fail with
<span class="quote">> error: invalid operand (violates constant bus restrictions)</span >
Constant bus restrictions are not relevant to the constants here, because these
are not literal constants (encoded in an additional instruction word), but
inline constants.
Instructions with one constant *or* one SGPR are working fine:
<span class="quote">> v_pk_fma_f16 v5, v1, v0, 0
> v_pk_fma_f16 v5, v1, s0, v0</span >
Initial regression point was
<span class="quote">> r301029 | 7995364 | kzhuravl_dev | 2017-04-21 22:57:53 +0300 (Fri, 21 Apr 2017)
> Reviewed at <a href="https://reviews.llvm.org/D32361">https://reviews.llvm.org/D32361</a>.</span >
Tested with r303147.</pre>
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