[PATCH] D80791: [AArch64] Generate .note.gnu.property based on module flags.

[Momchil Velikov via Phabricator via llvm-commits]

chill added a comment.

In D85649 <https://reviews.llvm.org/D85649> I suggested a different version of module flags, which is a bit nicer to use, e.g. one can say just

  getModuleFlag("sign-return-address-with-bkey") != nullptr

instead of a) checking for the flag presence, b) getting its value and c) comparing it to a set of strings, which is
way too verbose.

Thus, the set of module flags are essentially booleans:

- "sign-return-address" when PAC-RET is enabled; it establishes the defaults of signing non-leaf functions with the A key
- "sign-return-address-all", modifies the default, established by "sign-return-address" to signing all functions, including ones that do not spill LR
- "sign-return-address-with-bkey", modifies the default, established by "sign-return-address" to signing with the B key.

These are not ABI, so if, in the future, if we do need a set of values, we can easily change it.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80791/new/

https://reviews.llvm.org/D80791