[llvm-branch-commits] [clang] [llvm] release/22.x: [SystemZ] Enable -fpatchable-function-entry=M, N (#178191) (PR #194365)

[Dominik Steenken via llvm-branch-commits]

dominik-steenken wrote:

We would like this PR to be backported into LLVM 22.x . While it was intended as the implementation of a feature, it has since turned out that with non-clang frontends (`rustc` in this case), the absence of the implementation of `patchable-functrion-entry` can cause crashes, and so this should be considered a bugfix, rather than a new feature.

`rustc` adds `"patchable-function-entry"="X"` and `"patchable-function-prefix"="Y"` attributes to functions, which then leads to crashes on `s390x`.

https://github.com/llvm/llvm-project/pull/194365