Fixed trivially_copy_pass_by_ref warnings

lib/codegen/src/ir/valueloc.rs

@@ -26,8 +26,8 @@ impl Default for ValueLoc {
 
 impl ValueLoc {
     /// Is this an assigned location? (That is, not `Unassigned`).
-    pub fn is_assigned(&self) -> bool {
-        match *self {
+    pub fn is_assigned(self) -> bool {
+        match self {
             ValueLoc::Unassigned => false,
             _ => true,
         }
@@ -111,24 +111,24 @@ impl Default for ArgumentLoc {
 
 impl ArgumentLoc {
     /// Is this an assigned location? (That is, not `Unassigned`).
-    pub fn is_assigned(&self) -> bool {
-        match *self {
+    pub fn is_assigned(self) -> bool {
+        match self {
             ArgumentLoc::Unassigned => false,
             _ => true,
         }
     }
 
     /// Is this a register location?
-    pub fn is_reg(&self) -> bool {
-        match *self {
+    pub fn is_reg(self) -> bool {
+        match self {
             ArgumentLoc::Reg(_) => true,
             _ => false,
         }
     }
 
     /// Is this a stack location?
-    pub fn is_stack(&self) -> bool {
-        match *self {
+    pub fn is_stack(self) -> bool {
+        match self {
             ArgumentLoc::Stack(_) => true,
             _ => false,
         }