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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Copy Elision code produces assertion failure for i1 parameters"
href="http://bugs.llvm.org/show_bug.cgi?id=32136">32136</a>
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<th>Summary</th>
<td>Copy Elision code produces assertion failure for i1 parameters
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>4.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Common Code Generator Code
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>matze@braunis.de
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<pre>Swift triggers an assert in the copy elision code now. We believe this to be
cause by i1 parameters. I was able to craft a small reproducer:
target triple = "x86_64-apple-macosx"
@g = common global i8* null, align 8
define void @foo(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i1 %a6)
{
%tmp = alloca i1, align 4
store i1 %a6, i1* %tmp, align 4
%ptr = bitcast i1* %tmp to i8*
store i8* %ptr, i8** @g, align 8
ret void
}</pre>
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