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<p>Hello,</p>
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<p>I'm working on a sanitizer-like project and my modified module is getting past the verifier but crashing in CodeGen. I'm hoping someone can give me a hint towards the problem.</p>
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<p>Specifically the assertion that is failing is: </p>
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<div>llvm/CodeGen/MachineOperand.h:411: int64_t llvm::MachineOperand::getImm() const: Assertion `isImm() && "Wrong MachineOperand accessor"' failed.</div>
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<p>My pass is an IPO transformation. I haven't modified anything in CodeGen.</p>
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<p>I reduced the crash-causing module as much as possible. It is here: <a href="https://gist.github.com/scottcarr/72cf5cc3396e8a7156bc" id="LPlnk527616" title="https://gist.github.com/scottcarr/72cf5cc3396e8a7156bc
Ctrl+Click or tap to follow the link">https://gist.github.com/scottcarr/72cf5cc3396e8a7156bc</a></p>
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<p>If I compile this module with the command:</p>
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clang -c mk_sched_worker_free.ll
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<div>The command completes without error. If I compile with optimizations like:</div>
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<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">clang -c -O3 mk_sched_worker_free.ll</span><br>
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<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><br>
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<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">Then I trip the assertion and the compilation aborts.</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><br>
</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">I'm using a pretty new LLVM (3.9) but not the very latest commit.
If anyone could give me a hint as to what is wrong with this module or tell me if this seems like a bug in CodeGen that'd be a big help.</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;"><br>
</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">Thank you,</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">Scott A Carr</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">PhD Candidate</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols; font-size: 16px;">Purdue University</span></div>
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