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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang++ hangs when optimizing the infinite loop"
href="https://bugs.llvm.org/show_bug.cgi?id=47458">47458</a>
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<th>Summary</th>
<td>clang++ hangs when optimizing the infinite loop
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</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>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>tangyixuan@mail.dlut.edu.cn
</td>
</tr>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>Hi, the following code causes clang++ hangs with -O2/O3/Os.
$ cat s.cpp
struct A {
float a;
A ( float b ){
for ( int c ; c < b ;)
++ a ;
}
};
struct B {
B ( A );
};
int main (){
A (1.0);
B d (0.0), e (1.0);
}
$ clang++ -O2 s.cpp
<hang>
$ clang -v
clang version 11.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
ab4627364aefcaac751e757b721b7d07b48a545a)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/oscar/compiler/llvm-project/build/bin</pre>
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