Generalize BackendTypes over GenericCx

Author: oli-obk

Diff for: compiler/rustc_codegen_llvm/src/builder.rs

@@ -167,17 +167,17 @@ impl<'a, 'll> SBuilder<'a, 'll> {
 // FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer.
 const UNNAMED: *const c_char = c"".as_ptr();
 
-impl<'ll, 'tcx> BackendTypes for Builder<'_, 'll, 'tcx> {
-    type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value;
-    type Metadata = <CodegenCx<'ll, 'tcx> as BackendTypes>::Metadata;
-    type Function = <CodegenCx<'ll, 'tcx> as BackendTypes>::Function;
-    type BasicBlock = <CodegenCx<'ll, 'tcx> as BackendTypes>::BasicBlock;
-    type Type = <CodegenCx<'ll, 'tcx> as BackendTypes>::Type;
-    type Funclet = <CodegenCx<'ll, 'tcx> as BackendTypes>::Funclet;
-
-    type DIScope = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIScope;
-    type DILocation = <CodegenCx<'ll, 'tcx> as BackendTypes>::DILocation;
-    type DIVariable = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIVariable;
+impl<'ll, CX: Borrow<SCx<'ll>>> BackendTypes for GenericBuilder<'_, 'll, CX> {
+    type Value = <GenericCx<'ll, CX> as BackendTypes>::Value;
+    type Metadata = <GenericCx<'ll, CX> as BackendTypes>::Metadata;
+    type Function = <GenericCx<'ll, CX> as BackendTypes>::Function;
+    type BasicBlock = <GenericCx<'ll, CX> as BackendTypes>::BasicBlock;
+    type Type = <GenericCx<'ll, CX> as BackendTypes>::Type;
+    type Funclet = <GenericCx<'ll, CX> as BackendTypes>::Funclet;
+
+    type DIScope = <GenericCx<'ll, CX> as BackendTypes>::DIScope;
+    type DILocation = <GenericCx<'ll, CX> as BackendTypes>::DILocation;
+    type DIVariable = <GenericCx<'ll, CX> as BackendTypes>::DIVariable;
 }
 
 impl abi::HasDataLayout for Builder<'_, '_, '_> {

Diff for: compiler/rustc_codegen_llvm/src/common.rs

@@ -1,5 +1,7 @@
 //! Code that is useful in various codegen modules.
 
+use std::borrow::Borrow;
+
 use libc::{c_char, c_uint};
 use rustc_abi as abi;
 use rustc_abi::Primitive::Pointer;
@@ -18,6 +20,7 @@ use tracing::debug;
 
 use crate::consts::const_alloc_to_llvm;
 pub(crate) use crate::context::CodegenCx;
+use crate::context::{GenericCx, SCx};
 use crate::llvm::{self, BasicBlock, Bool, ConstantInt, False, Metadata, True};
 use crate::type_::Type;
 use crate::value::Value;
@@ -81,7 +84,7 @@ impl<'ll> Funclet<'ll> {
     }
 }
 
-impl<'ll> BackendTypes for CodegenCx<'ll, '_> {
+impl<'ll, CX: Borrow<SCx<'ll>>> BackendTypes for GenericCx<'ll, CX> {
     type Value = &'ll Value;
     type Metadata = &'ll Metadata;
     // FIXME(eddyb) replace this with a `Function` "subclass" of `Value`.