asb requested changes to this revision.
asb added a comment.
This revision now requires changes to proceed.

Everything that's in this patch looks good to me - it's just missing some 
simple round-trip tests in the style of rv32zicboz-valid.s (and perhaps an 
-invalid.s that shows a sensible error message being produced when the 
instructions have an argument).

In terms of which *.td file to edit - RISCVInstrInfoA.td is another 
possibility. The plan had been that for the `z?foo` extensions, the letter 
after the z indicated which of the top-level extensions it was most relevant to 
- e.g. the zc* extensions (ztso predated this idea). I don't mind much either 
way - I'm happy with it in either location.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133443/new/

https://reviews.llvm.org/D133443

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