diff --git a/src/driver/aot.rs b/src/driver/aot.rs
index e77b0cd0721..6cfbb52e921 100644
--- a/src/driver/aot.rs
+++ b/src/driver/aot.rs
@@ -467,7 +467,7 @@ pub(crate) fn run_aot(
 
             let cgu_name_builder = &mut CodegenUnitNameBuilder::new(tcx);
             let metadata_cgu_name = cgu_name_builder
-                .build_cgu_name(LOCAL_CRATE, &["crate"], Some("metadata"))
+                .build_cgu_name(LOCAL_CRATE, ["crate"], Some("metadata"))
                 .as_str()
                 .to_string();
 
diff --git a/src/inline_asm.rs b/src/inline_asm.rs
index 1d0d7ee75de..7793b1b7092 100644
--- a/src/inline_asm.rs
+++ b/src/inline_asm.rs
@@ -52,7 +52,7 @@ pub(crate) fn codegen_inline_asm_terminator<'tcx>(
     }
 
     let operands = operands
-        .into_iter()
+        .iter()
         .map(|operand| match *operand {
             InlineAsmOperand::In { reg, ref value } => CInlineAsmOperand::In {
                 reg,
@@ -763,7 +763,7 @@ fn call_inline_asm<'tcx>(
             },
         )
         .unwrap();
-    let inline_asm_func = fx.module.declare_func_in_func(inline_asm_func, &mut fx.bcx.func);
+    let inline_asm_func = fx.module.declare_func_in_func(inline_asm_func, fx.bcx.func);
     if fx.clif_comments.enabled() {
         fx.add_comment(inline_asm_func, asm_name);
     }
diff --git a/src/intrinsics/simd.rs b/src/intrinsics/simd.rs
index 78ea7c2dbfc..59dfba31a0a 100644
--- a/src/intrinsics/simd.rs
+++ b/src/intrinsics/simd.rs
@@ -293,7 +293,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
             }
 
             ret.write_cvalue(fx, base);
-            let ret_lane = ret.place_lane(fx, idx.try_into().unwrap());
+            let ret_lane = ret.place_lane(fx, idx.into());
             ret_lane.write_cvalue(fx, val);
         }
 
@@ -340,7 +340,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
                 );
             }
 
-            let ret_lane = v.value_lane(fx, idx.try_into().unwrap());
+            let ret_lane = v.value_lane(fx, idx.into());
             ret.write_cvalue(fx, ret_lane);
         }
 
diff --git a/src/lib.rs b/src/lib.rs
index f327577eb4d..635ff0ba709 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -314,16 +314,13 @@ fn build_isa(sess: &Session, backend_config: &BackendConfig) -> Arc<dyn isa::Tar
     let flags = settings::Flags::new(flags_builder);
 
     let isa_builder = match sess.opts.cg.target_cpu.as_deref() {
-        Some("native") => {
-            let builder = cranelift_native::builder_with_options(true).unwrap();
-            builder
-        }
+        Some("native") => cranelift_native::builder_with_options(true).unwrap(),
         Some(value) => {
             let mut builder =
                 cranelift_codegen::isa::lookup(target_triple.clone()).unwrap_or_else(|err| {
                     sess.dcx().fatal(format!("can't compile for {}: {}", target_triple, err));
                 });
-            if let Err(_) = builder.enable(value) {
+            if builder.enable(value).is_err() {
                 sess.dcx()
                     .fatal("the specified target cpu isn't currently supported by Cranelift.");
             }
diff --git a/src/unsize.rs b/src/unsize.rs
index f777e11371f..acfa461a6f3 100644
--- a/src/unsize.rs
+++ b/src/unsize.rs
@@ -28,10 +28,9 @@ pub(crate) fn unsized_info<'tcx>(
             .bcx
             .ins()
             .iconst(fx.pointer_type, len.eval_target_usize(fx.tcx, ParamEnv::reveal_all()) as i64),
-        (
-            &ty::Dynamic(ref data_a, _, src_dyn_kind),
-            &ty::Dynamic(ref data_b, _, target_dyn_kind),
-        ) if src_dyn_kind == target_dyn_kind => {
+        (&ty::Dynamic(data_a, _, src_dyn_kind), &ty::Dynamic(data_b, _, target_dyn_kind))
+            if src_dyn_kind == target_dyn_kind =>
+        {
             let old_info =
                 old_info.expect("unsized_info: missing old info for trait upcasting coercion");
             if data_a.principal_def_id() == data_b.principal_def_id() {
diff --git a/src/vtable.rs b/src/vtable.rs
index 41ea0b122de..d2254d4c15e 100644
--- a/src/vtable.rs
+++ b/src/vtable.rs
@@ -95,7 +95,7 @@ pub(crate) fn get_vtable<'tcx>(
     let alloc_id = fx.tcx.vtable_allocation((ty, trait_ref));
     let data_id =
         data_id_for_alloc_id(&mut fx.constants_cx, &mut *fx.module, alloc_id, Mutability::Not);
-    let local_data_id = fx.module.declare_data_in_func(data_id, &mut fx.bcx.func);
+    let local_data_id = fx.module.declare_data_in_func(data_id, fx.bcx.func);
     if fx.clif_comments.enabled() {
         fx.add_comment(local_data_id, format!("vtable: {:?}", alloc_id));
     }