Some clippy fixes

Author: bjorn3

src/abi/pass_mode.rs

@@ -208,7 +208,7 @@ pub(super) fn from_casted_value<'tcx>(
     });
     let ptr = Pointer::new(fx.bcx.ins().stack_addr(pointer_ty(fx.tcx), stack_slot, 0));
     let mut offset = 0;
-    let mut block_params_iter = block_params.into_iter().copied();
+    let mut block_params_iter = block_params.iter().copied();
     for param in abi_params {
         let val = ptr.offset_i64(fx, offset).store(
             fx,

src/abi/returning.rs

@@ -142,7 +142,7 @@ pub(super) fn codegen_with_call_return_arg<'tcx, T>(
                 let results = fx
                     .bcx
                     .inst_results(call_inst)
-                    .into_iter()
+                    .iter()
                     .copied()
                     .collect::<SmallVec<[Value; 2]>>();
                 let result =

src/debuginfo/line_info.rs

@@ -39,11 +39,11 @@ fn osstr_as_utf8_bytes(path: &OsStr) -> &[u8] {
     #[cfg(unix)]
     {
         use std::os::unix::ffi::OsStrExt;
-        return path.as_bytes();
+        path.as_bytes()
     }
     #[cfg(not(unix))]
     {
-        return path.to_str().unwrap().as_bytes();
+        path.to_str().unwrap().as_bytes()
     }
 }
 

src/intrinsics/simd.rs

@@ -88,7 +88,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
                 let idx_bytes = match idx_const.val {
                     ty::ConstKind::Value(ConstValue::ByRef { alloc, offset }) => {
                         let ptr = Pointer::new(AllocId(0 /* dummy */), offset);
-                        let size = Size::from_bytes(4 * u64::from(ret_lane_count) /* size_of([u32; ret_lane_count]) */);
+                        let size = Size::from_bytes(4 * ret_lane_count /* size_of([u32; ret_lane_count]) */);
                         alloc.get_bytes(fx, ptr, size).unwrap()
                     }
                     _ => unreachable!("{:?}", idx_const),

src/lib.rs

@@ -240,9 +240,9 @@ impl CodegenBackend for CraneliftCodegenBackend {
         vec![]
     }
 
-    fn codegen_crate<'tcx>(
+    fn codegen_crate(
         &self,
-        tcx: TyCtxt<'tcx>,
+        tcx: TyCtxt<'_>,
         metadata: EncodedMetadata,
         need_metadata_module: bool,
     ) -> Box<dyn Any> {
@@ -252,9 +252,7 @@ impl CodegenBackend for CraneliftCodegenBackend {
             BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
                 .unwrap_or_else(|err| tcx.sess.fatal(&err))
         };
-        let res = driver::codegen_crate(tcx, metadata, need_metadata_module, config);
-
-        res
+        driver::codegen_crate(tcx, metadata, need_metadata_module, config)
     }
 
     fn join_codegen(

src/num.rs

@@ -387,7 +387,7 @@ pub(crate) fn codegen_ptr_binop<'tcx>(
                 let lhs = in_lhs.load_scalar(fx);
                 let rhs = in_rhs.load_scalar(fx);
 
-                return codegen_compare_bin_op(fx, bin_op, false, lhs, rhs);
+                codegen_compare_bin_op(fx, bin_op, false, lhs, rhs)
             }
             BinOp::Offset => {
                 let pointee_ty = in_lhs.layout().ty.builtin_deref(true).unwrap().ty;
@@ -396,10 +396,10 @@ pub(crate) fn codegen_ptr_binop<'tcx>(
                 let ptr_diff = fx.bcx.ins().imul_imm(offset, pointee_size as i64);
                 let base_val = base.load_scalar(fx);
                 let res = fx.bcx.ins().iadd(base_val, ptr_diff);
-                return CValue::by_val(res, base.layout());
+                CValue::by_val(res, base.layout())
             }
             _ => unreachable!("{:?}({:?}, {:?})", bin_op, in_lhs, in_rhs),
-        };
+        }
     } else {
         let (lhs_ptr, lhs_extra) = in_lhs.load_scalar_pair(fx);
         let (rhs_ptr, rhs_extra) = in_rhs.load_scalar_pair(fx);

src/pretty_clif.rs

@@ -205,8 +205,8 @@ pub(crate) fn should_write_ir(tcx: TyCtxt<'_>) -> bool {
     tcx.sess.opts.output_types.contains_key(&OutputType::LlvmAssembly)
 }
 
-pub(crate) fn write_ir_file<'tcx>(
-    tcx: TyCtxt<'tcx>,
+pub(crate) fn write_ir_file(
+    tcx: TyCtxt<'_>,
     name: &str,
     write: impl FnOnce(&mut dyn Write) -> std::io::Result<()>,
 ) {