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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Allow builtins to be part of LTO"
href="https://bugs.llvm.org/show_bug.cgi?id=41384">41384</a>
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<th>Summary</th>
<td>Allow builtins to be part of LTO
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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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>Backend: WebAssembly
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>sbc@chromium.org
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Currently, at least the WebAssembly port of lld, builtin cannot be part of LTO.
The problem is way the linker decides what to export from LTO:
- linker decides which bitcode files it needs
- linker decided which symbols to export from LTO process
- LTO process generates a call to builtin and is in the LTO object, but not
exported
- LTO object doesn't export this builtin
- builtin is undefined and crashes lld.
I will see if I can repro this with ELF lld too.</pre>
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