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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [WinEH] Tail duplication pass asserts in the presence of catchpads"
href="https://llvm.org/bugs/show_bug.cgi?id=25444">25444</a>
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<th>Summary</th>
<td>[WinEH] Tail duplication pass asserts in the presence of catchpads
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>consider:
void g(void *, bool);
void f(int b, void *c) {
bool a = false;
try {
g(c, b);
a = true;
} catch (...) {
}
g(c, a);
}
run with:
clang -cc1 -triple i686-pc-windows-msvc18.0.0 -emit-obj -fcxx-exceptions
-fexceptions -O2 dll_main-fd2b3b.ii -o - -emit-llvm
we crash here:
lib/CodeGen/TailDuplication.cpp:624: bool <anonymous
namespace>::TailDuplicatePass::shouldTailDuplicate(const llvm::MachineFunction
&, bool, llvm::MachineBasicBlock &): Assertion `Idx != 0' failed.</pre>
</div>
</p>
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