Module target_features

Functions

asm_target_features 🔒

Computes the set of target features used in a function for the purposes of inline assembly.

cfg_target_feature

Utility function for a codegen backend to compute cfg(target_feature), or more specifically, to populate sess.unstable_target_features and sess.target_features (these are the first and 2nd component of the return value, respectively).

check_target_feature_trait_unsafe 🔒

Checks the function annotated with #[target_feature] is not a safe trait method implementation, reporting an error if it is.

check_tied_features

Given a map from target_features to whether they are enabled or disabled, ensure only valid combinations are allowed.

flag_to_backend_features

Translates the -Ctarget-feature flag into a backend target feature list.

from_target_feature_attr 🔒

Compute the enabled target features from the #[target_feature] function attribute. Enabled target features are added to target_features.

parse_rust_feature_flag 🔒

Parse the value of -Ctarget-feature, also expanding implied features, and call the closure for each (expanded) Rust feature. If the list contains a syntactically invalid item (not starting with +/-), the error callback is invoked.

provide 🔒

retpoline_features_by_flags

Computes the backend target features to be added to account for retpoline flags. Used by both LLVM and GCC since their target features are, conveniently, the same.