[PATCH] D117757: [AArch64] Modeling NZCV read/write for MOPS instructions

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

Usually it would be good to have a test for these kinds of changes, but these instructions are never used anywhere (we will use the pseudos for codegen), and I'm not sure of a way to test it otherwise.

For these instructions, marking them as Def NZCV will show that they clobber nzcv which is good. As far as I understand the "P" instruction Defs' and the other ("M", "E") will read the value. Is it worth trying to specify that more precisely? It might not alter a lot atm, but may be good to make sure the info is correct.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D117757/new/

https://reviews.llvm.org/D117757