Querify `global_backend_features`

At the very least this serves to deduplicate the diagnostics that are
output about unknown target features provided via CLI.

2 files changed, 3 insertions, 1 deletions

diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs
index 55ea0c4d727..e23572104c4 100644
--- a/compiler/rustc_codegen_ssa/src/back/write.rs
+++ b/compiler/rustc_codegen_ssa/src/back/write.rs
@@ -1033,6 +1033,7 @@ fn start_executing_work<B: ExtraBackendMethods>(
     } else {
         tcx.backend_optimization_level(())
     };
+    let backend_features = tcx.global_backend_features(());
     let cgcx = CodegenContext::<B> {
         backend: backend.clone(),
         crate_types: sess.crate_types().to_vec(),
@@ -1054,7 +1055,7 @@ fn start_executing_work<B: ExtraBackendMethods>(
         regular_module_config: regular_config,
         metadata_module_config: metadata_config,
         allocator_module_config: allocator_config,
-        tm_factory: backend.target_machine_factory(tcx.sess, ol),
+        tm_factory: backend.target_machine_factory(tcx.sess, ol, backend_features),
         total_cgus,
         msvc_imps_needed: msvc_imps_needed(tcx),
         is_pe_coff: tcx.sess.target.is_like_windows,
diff --git a/compiler/rustc_codegen_ssa/src/traits/backend.rs b/compiler/rustc_codegen_ssa/src/traits/backend.rs
index c6abb3f6eb4..a71eadd3d75 100644
--- a/compiler/rustc_codegen_ssa/src/traits/backend.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/backend.rs
@@ -134,6 +134,7 @@ pub trait ExtraBackendMethods: CodegenBackend + WriteBackendMethods + Sized + Se
         &self,
         sess: &Session,
         opt_level: config::OptLevel,
+        target_features: &[String],
     ) -> TargetMachineFactoryFn<Self>;
     fn target_cpu<'b>(&self, sess: &'b Session) -> &'b str;
     fn tune_cpu<'b>(&self, sess: &'b Session) -> Option<&'b str>;