| Issue |
141655
|
| Summary |
analyzeCompare needs a way to report subregister uses
|
| Labels |
llvm:codegen
|
| Assignees |
|
| Reporter |
arsenm
|
[analyzeCompare](https://github.com/llvm/llvm-project/blob/a9b64bb3180dab6d28bf800a641f9a9ad54d2c0c/llvm/include/llvm/CodeGen/TargetInstrInfo.h#L1777)'s interface is broken because it does not provide a way to report used subregister indexes in the instruction. If there is a subregister use, it's unsafe to return true and you must skip the instruction (e.g. #141654).
This should probably change the reported Register inputs to RegSubRegPair
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