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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Wreturn-stack-address vs -Wreturn-local-addr"
href="https://bugs.llvm.org/show_bug.cgi?id=40433">40433</a>
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<th>Summary</th>
<td>-Wreturn-stack-address vs -Wreturn-local-addr
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>8.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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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
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ndesaulniers@google.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk, srhines@google.com
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<p>
<div>
<pre>While testing out some code in godbolt, I noticed that GCC was flagging this
(contrived, nonsensical) code with -Wreturn-local-addr.
// clang -O2 -std=gnu89 -Wreturn-stack-address
// gcc -O2 -std=gnu89 -Wreturn-local-addr
float* foo() {
int foo; float* bar = (float*)&foo; return bar;
}
It seems that Clang doesn't warn for this case. There's a flag in Clang,
`-Wreturn-stack-address`, but it doesn't flag this case. Maybe 2 action items
here:
1. add alias for -Wreturn-local-addr
2. see if -Wreturn-stack-address is broken for the above case, or what.</pre>
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