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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AArch64] UnwindInfo cannot be emitted if inline asm with align or fill are used"
href="https://bugs.llvm.org/show_bug.cgi?id=48088">48088</a>
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<th>Summary</th>
<td>[AArch64] UnwindInfo cannot be emitted if inline asm with align or fill are used
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>11.0
</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>
</tr>
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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>MC
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>rixript@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>For more info see FIXME in ARM64EmitUnwindInfo (llvm/lib/MC/MCWin64EH.cpp)
<a href="https://github.com/llvm/llvm-project/blob/f69e090/llvm/lib/MC/MCWin64EH.cpp#L918-L943">https://github.com/llvm/llvm-project/blob/f69e090/llvm/lib/MC/MCWin64EH.cpp#L918-L943</a>
Reproducible example:
void test() { __asm__(".balign 1");
Compiling with:
clang.exe --target=x86_64-pc-windows -c test.cpp
Gives no error, however, compiling with
clang.exe --target=aarch64-pc-windows -c test.cpp
Crashes:
fatal error: error in backend: Failed to evaluate function length in SEH unwind
info
Stack dump:
0. Program arguments: clang.exe --target=aarch64-pc-windows -c test.cpp
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'test.cpp'.
4. Running pass 'AArch64 Assembly Printer' on function '@"?test@@YAXXZ"'
Related bug report: <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - SEH unwinding breaks in the presence of a jump-table on Windows/AArch64"
href="show_bug.cgi?id=41581">https://bugs.llvm.org/show_bug.cgi?id=41581</a></pre>
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