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lhsvals
2017 Apr 24
3
Debugging UNREACHABLE "Couldn't join subrange" in RegisterCoalescer (out-of-tree backend)
Hello,
I have a minimal testcase which crashes RegisterCoalescer in my out-of-tree target. It only crashes in Debug builds of llc---not in Release builds. Also, interesting to note that the x86 backend lowers this same testcase successfully. I did a quick search of bugs.llvm.org and found no matches.
This implies that the problem is in my backend and/or how my backend interacts with