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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - cfi-icall + ThinLTO: does not include function decl/def names in hash used for caching"
href="https://bugs.llvm.org/show_bug.cgi?id=33966">33966</a>
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<th>Summary</th>
<td>cfi-icall + ThinLTO: does not include function decl/def names in hash used for caching
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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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>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Interprocedural Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>peter@pcc.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat 1.c
void f(void);
void* _start(void (*p)(void)) {
p();
return f;
}
$ cat 2.c
void f(void) {}
$ rm -rf cache/
$ clang -c -flto=thin -fsanitize=cfi-icall 1.c -O
$ clang -c 2.c -O
$ ld.lld 1.o 2.o --thinlto-cache-dir=cache
$ clang -c -flto=thin -fsanitize=cfi-icall 2.c -O
$ ld.lld 1.o 2.o --thinlto-cache-dir=cache
ld.lld: error: undefined symbol: f.cfi_jt
<span class="quote">>>> referenced by 1.c
>>> cache/llvmcache-88B852A71DDDCDEA532AB952595D5ACDDE9A1936:(_start)</span ></pre>
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