[llvm-branch-commits] [llvm] [SPARC][IAS] Reject unknown/unavailable mnemonics early in ParseInstruction (PR #96021)

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koachan wrote:

Hmmm, so, change of approach - I decided to follow what the MIPS backend does and validate all mnemonics early in ParseInstruction, before any operand parsing is done.
This gets IAS to emit the correct error message for missing instructions.

The misuse of ParseStatus returns still needs to be addressed, but at least I think with this approach it should no longer be a blocker for this particular issue?

https://github.com/llvm/llvm-project/pull/96021