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<body><span class="vcard"><a class="email" href="mailto:e.menezes@samsung.com" title="Evandro Menezes <e.menezes@samsung.com>"> <span class="fn">Evandro Menezes</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Redundant Restore of $x0 when memcpy always returns the first argument."
href="https://bugs.llvm.org/show_bug.cgi?id=38849">bug 38849</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>WONTFIX
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Redundant Restore of $x0 when memcpy always returns the first argument."
href="https://bugs.llvm.org/show_bug.cgi?id=38849#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Redundant Restore of $x0 when memcpy always returns the first argument."
href="https://bugs.llvm.org/show_bug.cgi?id=38849">bug 38849</a>
from <span class="vcard"><a class="email" href="mailto:e.menezes@samsung.com" title="Evandro Menezes <e.menezes@samsung.com>"> <span class="fn">Evandro Menezes</span></a>
</span></b>
<pre>It seems that the problem is that the return value from memcpy() is cast to
void*:
%struct.BigStruct = type { [64 x i32] }
define dso_local void @_Z17callStructByValueii9BigStruct(i32 %unused, i32
%unused2, %struct.BigStruct* nocapture readonly %s) local_unnamed_addr #0 {
entry:
%agg.tmp = alloca %struct.BigStruct, align 4
%0 = bitcast %struct.BigStruct* %agg.tmp to i8*
%1 = bitcast %struct.BigStruct* %s to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 %0, i8* align 4 %1,
i64 256, i1 false), !tbaa.struct !2
call void @_Z13structByValue9BigStruct(%struct.BigStruct* nonnull %agg.tmp)
ret void
}</pre>
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