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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Using __attribute__((weak,dllimport)) results in clang generating invalid IR"
href="https://bugs.llvm.org/show_bug.cgi?id=41776">41776</a>
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<th>Summary</th>
<td>Using __attribute__((weak,dllimport)) results in clang generating invalid IR
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</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>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>rnk@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Consder:
int __attribute__((weak, dllimport)) my_weak(int x); // { return x; }
int main() {
if (my_weak)
my_weak(0);
return 13;
}
$ clang -cc1 -triple x86_64-windows-msvc t.c -S -o t.s
Global is marked as dllimport, but not external
i32 (i32)* @my_weak
fatal error: error in backend: Broken module found, compilation aborted!
Stack dump:
0. Program arguments: C:\src\llvm-project\build\bin\clang.exe -cc1 -triple
x86_64-windows-msvc t.c -S -o t.s
1. <eof> parser at end of file
2. Per-function optimization</pre>
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