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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad code leads to unreachable in llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit)"
href="https://bugs.llvm.org/show_bug.cgi?id=32028">32028</a>
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<th>Summary</th>
<td>Bad code leads to unreachable in llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit)
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>filcab@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Via "flacs"
Flags to generate (at least some) debug info are required for the unreachable
to execute. Related to r293207 (PR0091R3: Implement parsing support for using
templates as types).
[llvm-cmake-debug]% ./bin/clang --version # Updated just now
clang version 5.0.0 (trunk 295714) (llvm/trunk 295716)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Users/filcab/work/llvm-cmake-debug/./bin
[llvm-cmake-debug]% cat a.cpp
template<typename T>
struct A
{
};
A a = A<int>();
[llvm-cmake-debug]% ./bin/clang -cc1 -triple x86_64-unknown-linux-gnu -S
-debug-info-kind=limited -std=c++1z -o /dev/null a.cpp
type should have been unwrapped!
UNREACHABLE executed at
/Users/filcab/work/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp:2657!
Stack dump:
0. Program arguments: ./bin/clang -cc1 -triple x86_64-unknown-linux-gnu -S
-debug-info-kind=limited -std=c++1z -o /dev/null a.cpp
1. <eof> parser at end of file
2. a.cpp:6:3: LLVM IR generation of declaration 'a'
3. a.cpp:6:3: Generating code for declaration 'a'
[1] 58227 abort ./bin/clang -cc1 -triple x86_64-unknown-linux-gnu -S
-debug-info-kind=limited</pre>
</div>
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