Move compiler_builtin check to the use case

1 files changed, 0 insertions, 32 deletions

diff --git a/compiler/rustc_monomorphize/src/lib.rs b/compiler/rustc_monomorphize/src/lib.rs
index e5a63a98ff4..fc6e8e0d14f 100644
--- a/compiler/rustc_monomorphize/src/lib.rs
+++ b/compiler/rustc_monomorphize/src/lib.rs
@@ -8,12 +8,8 @@ use rustc_middle::bug;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::traits;
 use rustc_middle::ty::adjustment::CustomCoerceUnsized;
-use rustc_middle::ty::Instance;
-use rustc_middle::ty::TyCtxt;
 use rustc_middle::ty::{self, Ty};
 use rustc_middle::util::Providers;
-use rustc_span::def_id::DefId;
-use rustc_span::def_id::LOCAL_CRATE;
 use rustc_span::ErrorGuaranteed;
 
 mod collector;
@@ -46,34 +42,6 @@ fn custom_coerce_unsize_info<'tcx>(
     }
 }
 
-/// Returns whether a call from the current crate to the [`Instance`] would produce a call
-/// from `compiler_builtins` to a symbol the linker must resolve.
-///
-/// Such calls from `compiler_bultins` are effectively impossible for the linker to handle. Some
-/// linkers will optimize such that dead calls to unresolved symbols are not an error, but this is
-/// not guaranteed. So we used this function in codegen backends to ensure we do not generate any
-/// unlinkable calls.
-///
-/// Note that calls to LLVM intrinsics are uniquely okay because they won't make it to the linker.
-pub fn is_call_from_compiler_builtins_to_upstream_monomorphization<'tcx>(
-    tcx: TyCtxt<'tcx>,
-    instance: Instance<'tcx>,
-) -> bool {
-    fn is_llvm_intrinsic(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
-        if let Some(name) = tcx.codegen_fn_attrs(def_id).link_name {
-            name.as_str().starts_with("llvm.")
-        } else {
-            false
-        }
-    }
-
-    let def_id = instance.def_id();
-    !def_id.is_local()
-        && tcx.is_compiler_builtins(LOCAL_CRATE)
-        && !is_llvm_intrinsic(tcx, def_id)
-        && !tcx.should_codegen_locally(instance)
-}
-
 pub fn provide(providers: &mut Providers) {
     partitioning::provide(providers);
     polymorphize::provide(providers);