[llvm] [TableGen] Introduce a less aggressive suppression for HwMode Decoder… (PR #86060)

[via llvm-commits]

superZWT123 wrote:

Hi, @topperc,
Could you help review this PR? The logic of this part of the code is relatively simple, and we have had extensive discussions on it before. I have another fix related to ‘EncodingByHwMode’ that I plan to submit after this one is finalized. I tested my fix on RISCV, enabling ‘EncodingByHwMode’, and everything works as expected. The adaptation required from users to utilize ‘EncodingByHwMode’ is minimal. After this PR is concluded, I will also submit a simple example for RISCV as a reference. Thank you very much!
RFC:https://discourse.llvm.org/t/rfc-fix-tablegen-for-hwmode/77625

https://github.com/llvm/llvm-project/pull/86060