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2445dd794e
rust/compiler/rustc_codegen_ssa
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kulst 2445dd794e Persist target features used for codegen beyond tcx 
Bitcode linkers like llvm-bitcode-linker or bpf linker hand over the target features to llvm during link stage. During link stage the `TyCtxt` is already gone so it is not possible to create a query for the global backend features any longer. The features preserved in `Session.target_features` only incorporate target features known to rustc. This would contradict with the behaviour during codegen stage which also passes target features to llvm which are unknown to rustc.
This commit adds target features as a field to the `CrateInfo` struct and queries the target features in its new function. This way the target features are preserved beyond tcx and available at link stage.
To make sure the `global_backend_features` query is always registered even if the CodegenBackend does not register it, this registration is added to the `provide`function of the `rustc_codegen_ssa` crate.
2025-02-16 21:57:03 +01:00
..
src Persist target features used for codegen beyond tcx 2025-02-16 21:57:03 +01:00
Cargo.toml Bump cc to v1.2.13 for the compiler workspace 2025-02-10 00:06:31 -08:00
messages.ftl Rollup merge of #133429 - EnzymeAD:autodiff-middle, r=oli-obk 2025-01-31 00:26:30 -05:00
README.md

README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.