Use BackendTypes instead of Backend or HasCodegen in a few places

src/librustc_codegen_ssa/traits/abi.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::HasCodegen;
+use super::BackendTypes;
 use rustc::ty::{FnSig, Instance, Ty};
 use rustc_target::abi::call::FnType;
 
@@ -18,6 +18,6 @@ pub trait AbiMethods<'tcx> {
     fn fn_type_of_instance(&self, instance: &Instance<'tcx>) -> FnType<'tcx, Ty<'tcx>>;
 }
 
-pub trait AbiBuilderMethods<'tcx>: HasCodegen<'tcx> {
+pub trait AbiBuilderMethods<'tcx>: BackendTypes {
     fn apply_attrs_callsite(&mut self, ty: &FnType<'tcx, Ty<'tcx>>, callsite: Self::Value);
 }

src/librustc_codegen_ssa/traits/asm.rs

@@ -8,13 +8,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::Backend;
-use super::HasCodegen;
+use super::BackendTypes;
 use mir::place::PlaceRef;
 use rustc::hir::{GlobalAsm, InlineAsm};
 
-pub trait AsmBuilderMethods<'tcx>: HasCodegen<'tcx> {
-    // Take an inline assembly expression and splat it out via LLVM
+pub trait AsmBuilderMethods<'tcx>: BackendTypes {
+    /// Take an inline assembly expression and splat it out via LLVM
     fn codegen_inline_asm(
         &mut self,
         ia: &InlineAsm,
@@ -23,6 +22,6 @@ pub trait AsmBuilderMethods<'tcx>: HasCodegen<'tcx> {
     ) -> bool;
 }
 
-pub trait AsmMethods<'tcx>: Backend<'tcx> {
+pub trait AsmMethods<'tcx> {
     fn codegen_global_asm(&self, ga: &GlobalAsm);
 }

src/librustc_codegen_ssa/traits/debuginfo.rs

@@ -8,8 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::Backend;
-use super::HasCodegen;
+use super::BackendTypes;
 use debuginfo::{FunctionDebugContext, MirDebugScope, VariableAccess, VariableKind};
 use rustc::hir::def_id::CrateNum;
 use rustc::mir;
@@ -19,7 +18,7 @@ use rustc_mir::monomorphize::Instance;
 use syntax::ast::Name;
 use syntax_pos::{SourceFile, Span};
 
-pub trait DebugInfoMethods<'tcx>: Backend<'tcx> {
+pub trait DebugInfoMethods<'tcx>: BackendTypes {
     fn create_vtable_metadata(&self, ty: Ty<'tcx>, vtable: Self::Value);
 
     /// Creates the function-specific debug context.
@@ -51,7 +50,7 @@ pub trait DebugInfoMethods<'tcx>: Backend<'tcx> {
     fn debuginfo_upvar_decls_ops_sequence(&self, byte_offset_of_var_in_env: u64) -> [i64; 4];
 }
 
-pub trait DebugInfoBuilderMethods<'tcx>: HasCodegen<'tcx> {
+pub trait DebugInfoBuilderMethods<'tcx>: BackendTypes {
     fn declare_local(
         &mut self,
         dbg_context: &FunctionDebugContext<Self::DIScope>,

src/librustc_codegen_ssa/traits/declare.rs

@@ -8,13 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::Backend;
+use super::BackendTypes;
 use rustc::hir::def_id::DefId;
 use rustc::mir::mono::{Linkage, Visibility};
 use rustc::ty;
 use rustc_mir::monomorphize::Instance;
 
-pub trait DeclareMethods<'tcx>: Backend<'tcx> {
+pub trait DeclareMethods<'tcx>: BackendTypes {
     /// Declare a global value.
     ///
     /// If there’s a value with the same name already declared, the function will
@@ -71,7 +71,7 @@ pub trait DeclareMethods<'tcx>: Backend<'tcx> {
     fn get_defined_value(&self, name: &str) -> Option<Self::Value>;
 }
 
-pub trait PreDefineMethods<'tcx>: Backend<'tcx> {
+pub trait PreDefineMethods<'tcx>: BackendTypes {
     fn predefine_static(
         &self,
         def_id: DefId,

src/librustc_codegen_ssa/traits/intrinsic.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::HasCodegen;
+use super::BackendTypes;
 use mir::operand::OperandRef;
 use rustc::ty::Ty;
 use rustc_target::abi::call::FnType;
@@ -21,7 +21,7 @@ pub enum OverflowOp {
     Mul,
 }
 
-pub trait IntrinsicCallMethods<'tcx>: HasCodegen<'tcx> {
+pub trait IntrinsicCallMethods<'tcx>: BackendTypes {
     /// Remember to add all intrinsics here, in librustc_typeck/check/mod.rs,
     /// and in libcore/intrinsics.rs; if you need access to any llvm intrinsics,
     /// add them to librustc_codegen_llvm/context.rs

src/librustc_codegen_ssa/traits/misc.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use super::Backend;
+use super::BackendTypes;
 use libc::c_uint;
 use rustc::mir::mono::Stats;
 use rustc::session::Session;
@@ -18,7 +18,7 @@ use rustc_mir::monomorphize::partitioning::CodegenUnit;
 use std::cell::RefCell;
 use std::sync::Arc;
 
-pub trait MiscMethods<'tcx>: Backend<'tcx> {
+pub trait MiscMethods<'tcx>: BackendTypes {
     fn vtables(
         &self,
     ) -> &RefCell<FxHashMap<(Ty<'tcx>, ty::PolyExistentialTraitRef<'tcx>), Self::Value>>;

src/librustc_codegen_ssa/traits/type_.rs

@@ -20,6 +20,8 @@ use rustc_target::abi::call::{ArgType, CastTarget, FnType, Reg};
 use std::cell::RefCell;
 use syntax::ast;
 
+// This depends on `Backend` and not `BackendTypes`, because consumers will probably want to use
+// `LayoutOf` or `HasTyCtxt`. This way, they don't have to add a constraint on it themselves.
 pub trait BaseTypeMethods<'tcx>: Backend<'tcx> {
     fn type_void(&self) -> Self::Type;
     fn type_metadata(&self) -> Self::Type;