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generalize 'forbidden feature' concept so that even (un)stable feature can be invalid to toggle

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Also rename some things for extra clarity
This commit is contained in:
Ralf Jung 2024-11-16 10:00:16 +01:00
parent 1f3bf231e1
commit 2d887a5c5c
13 changed files with 468 additions and 401 deletions
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4
compiler/rustc_codegen_ssa/src/traits/backend.rs
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@ -45,7 +45,9 @@ pub trait CodegenBackend {
fn print(&self, _req: &PrintRequest, _out: &mut String, _sess: &Session) {}
fn target_features(&self, _sess: &Session, _allow_unstable: bool) -> Vec<Symbol> {
/// Returns the features that should be set in `cfg(target_features)`.
/// RUSTC_SPECIFIC_FEATURES should be skipped here, those are handled outside codegen.
fn target_features_cfg(&self, _sess: &Session, _allow_unstable: bool) -> Vec<Symbol> {
vec![]
}