| Issue |
186140
|
| Summary |
[CodeGen] aritificial subregister should not be generated in tablegen files
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
broxigarchen
|
This is from this patch https://github.com/llvm/llvm-project/pull/185751 There is a problem found in machine copy propagation pass that a COPY is folded into an aritificial subregister which end up with a crash in the following pass.
There seems to be some missing work to fully recognize actual forwardable subregisters, and maybe llvm should not emit artificial subregisters into the tablegen files at all.
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