Hello,
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.
Specifically the assertion that is failing is:
llvm/CodeGen/MachineOperand.h:411: int64_t llvm::MachineOperand::getImm() const:
Assertion `isImm() && "Wrong MachineOperand accessor"'
failed.
My pass is an IPO transformation. I haven't modified anything in CodeGen.
I reduced the crash-causing module as much as possible. It is here:
https://gist.github.com/scottcarr/72cf5cc3396e8a7156bc
If I compile this module with the command:
clang -c mk_sched_worker_free.ll
The command completes without error. If I compile with optimizations like:
clang -c -O3 mk_sched_worker_free.ll
Then I trip the assertion and the compilation aborts.
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.
Thank you,
Scott A Carr
PhD Candidate
Purdue University
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