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<body><span class="vcard"><a class="email" href="mailto:echristo@gmail.com" title="Eric Christopher <echristo@gmail.com>"> <span class="fn">Eric Christopher</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ppc] wrong code generated for bswap(int32) and followed by store16"
href="http://bugs.llvm.org/show_bug.cgi?id=32063">bug 32063</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>echristo@gmail.com
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ppc] wrong code generated for bswap(int32) and followed by store16"
href="http://bugs.llvm.org/show_bug.cgi?id=32063#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ppc] wrong code generated for bswap(int32) and followed by store16"
href="http://bugs.llvm.org/show_bug.cgi?id=32063">bug 32063</a>
from <span class="vcard"><a class="email" href="mailto:echristo@gmail.com" title="Eric Christopher <echristo@gmail.com>"> <span class="fn">Eric Christopher</span></a>
</span></b>
<pre>Believe this is fixed thusly:
commit e225b39cd4cdf3b62d5395ab3a6753a8503dbff7
Author: Guozhi Wei <<a href="mailto:carrot@google.com">carrot@google.com</a>>
Date: Thu Mar 2 21:07:59 2017 +0000
[PPC] Fix code generation for bswap(int32) followed by store16
This patch fixes pr32063.
Current code in PPCTargetLowering::PerformDAGCombine can transform
bswap
store
into a single PPCISD::STBRX instruction. but it doesn't consider the case
that the operand size of bswap may be larger than store size. When it occurs,
we need 2 modifications,
1 For the last operand of PPCISD::STBRX, we should not use
DAG.getValueType(N->getOperand(1).getValueType()), instead we should use
cast<StoreSDNode>(N)->getMemoryVT().
2 Before PPCISD::STBRX, we need to shift the original operand of bswap to
the right side.
Differential Revision: <a href="https://reviews.llvm.org/D30362">https://reviews.llvm.org/D30362</a>
git-svn-id: <a href="https://llvm.org/svn/llvm-project/llvm/trunk@296811">https://llvm.org/svn/llvm-project/llvm/trunk@296811</a>
91177308-0d34-0410-b5e6-96231b3b80d8</pre>
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