bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Rollup merge of #127506 - liushuyu:s390x-target-features, r=davidtwco

Browse source 
rustc_target: add known safe s390x target features

This pull request adds known safe target features for s390x (aka IBM Z systems).
Currently, these features are unstable since stabilizing the target features requires submitting proposals.

The `vector` feature was added in IBM Z13 (`arch11`), and this is a SIMD feature for the newer IBM Z systems.
The `backchain` attribute is the IBM Z way of adding frame pointers like unwinding capabilities (the "frame-pointer" switch on IBM Z and IBM POWER platforms will add _emulated_ frame pointers to the binary, which profilers can't use for unwinding the stack).

Both attributes can be applied at the LLVM module or function levels. However, the `backchain` attribute has to be enabled for all the functions in the call stack to get a successful unwind process.
This commit is contained in:
Trevor Gross 2024-07-22 11:40:19 -05:00 • committed by GitHub
commit 5e8e46cbd2
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
10 changed files with 46 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

1
compiler/rustc_span/src/symbol.rs
View file

@ -1691,6 +1691,7 @@ symbols! {
rvalue_static_promotion,
rwpi,
s,
s390x_target_feature,
safety,
sanitize,
sanitizer_cfi_generalize_pointers,