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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assert dependent on how LLVM library is called"
href="https://bugs.llvm.org/show_bug.cgi?id=45836">45836</a>
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<th>Summary</th>
<td>Assert dependent on how LLVM library is called
</td>
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>10.0
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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
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>david.jones@metrics.ca
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>Created <span class=""><a href="attachment.cgi?id=23459" name="attach_23459" title="Original, working, generator code">attachment 23459</a> <a href="attachment.cgi?id=23459&action=edit" title="Original, working, generator code">[details]</a></span>
Original, working, generator code
I recently upgraded a codebase from LLVM 7.0.1 to LLVM 10.0.0.
While tracking down an LLVM assert in the RISCV backend, I replaced the code I
used to generate object code with code cribbed almost verbatim from
<a href="https://llvm.org/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.html">https://llvm.org/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.html</a>. My
previous code evolved from llc sources all the way back from the 3.3 days.
Unfortunately, my simplified code now yields an assert in the X86 backend!
ds_cg:
/scratch/user/djones/llvm10/llvm-10.0.0.src/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:898:
bool llvm::SelectionDAG::RemoveNodeFromCSEMaps(llvm::SDNode*): Assertion
`N->getOpcode() != ISD::DELETED_NODE && "DELETED_NODE in CSEMap!"' failed.
Manually invoking opt and llc on the IR code works fine.
Attachments:
wrap.orig: my original object generation code. Works fine.
wrap.simple: code that yields this bug.
LMsbox.sir.ll: LLVM IR that causes my problem.</pre>
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