[llvm] [TableGen][AMDGPU][AsmParser] Catch and fix ambiguous instructions (PR #211093)

[Jay Foad via llvm-commits]

jayfoad wrote:

> Declares mutually exclusive assembler predicates and teaches TableGen to use that knowledge to report matchables that are indistinguishable to the asm parser.

Can you explain this a bit more? How does knowing that two predicates are mutually exclusive allow detection of matchables that are indistinguishable to the asm parser? Can you give a simple example?

https://github.com/llvm/llvm-project/pull/211093