Rollup merge of #118908 - Urgau:check-cfg-target-features, r=TaKO8Ki,GuillaumeGomez,workingjubilee

Add all known `target_feature` configs to check-cfg

This PR adds all the known `target_feature` from ~~`rustc_codegen_ssa`~~ `rustc_target` to the well known list of check-cfg.

It does so by moving the list from `rustc_codegen_ssa` to `rustc_target` ~~`rustc_session` (I not sure about this, but some of the moved function take a `Session`)~~, then using it the `fill_well_known` function.

This already proved to be useful since portable-simd had a bad cfg.

cc `@nnethercote` (since we discussed it in https://github.com/rust-lang/rust/pull/118494)

1 files changed, 3 insertions, 5 deletions

diff --git a/compiler/rustc_codegen_gcc/src/gcc_util.rs b/compiler/rustc_codegen_gcc/src/gcc_util.rs
index 1248fdcd259..2aa84f26797 100644
--- a/compiler/rustc_codegen_gcc/src/gcc_util.rs
+++ b/compiler/rustc_codegen_gcc/src/gcc_util.rs
@@ -2,12 +2,10 @@
 use gccjit::Context;
 use smallvec::{smallvec, SmallVec};
 
-use rustc_codegen_ssa::target_features::{
-    supported_target_features, tied_target_features, RUSTC_SPECIFIC_FEATURES,
-};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_middle::bug;
 use rustc_session::Session;
+use rustc_target::target_features::RUSTC_SPECIFIC_FEATURES;
 
 use crate::errors::{PossibleFeature, TargetFeatureDisableOrEnable, UnknownCTargetFeature, UnknownCTargetFeaturePrefix};
 
@@ -44,7 +42,7 @@ pub(crate) fn global_gcc_features(sess: &Session, diagnostics: bool) -> Vec<Stri
     );
 
     // -Ctarget-features
-    let supported_features = supported_target_features(sess);
+    let supported_features = sess.target.supported_target_features();
     let mut featsmap = FxHashMap::default();
     let feats = sess.opts.cg.target_feature
         .split(',')
@@ -187,7 +185,7 @@ pub fn to_gcc_features<'a>(sess: &Session, s: &'a str) -> SmallVec<[&'a str; 2]>
 // Given a map from target_features to whether they are enabled or disabled,
 // ensure only valid combinations are allowed.
 pub fn check_tied_features(sess: &Session, features: &FxHashMap<&str, bool>) -> Option<&'static [&'static str]> {
-    for tied in tied_target_features(sess) {
+    for tied in sess.target.tied_target_features() {
         // Tied features must be set to the same value, or not set at all
         let mut tied_iter = tied.iter();
         let enabled = features.get(tied_iter.next().unwrap());