Auto merge of #8807 - Jarcho:cmp_owned, r=giraffate

Fix `cmp_owned` on copy types

fixes #8803
fixes #7365

changelog: Don't lint `cmp_owned` on `From::from` for copy types

tests/ui/cmp_owned/without_suggestion.rs

@@ -9,6 +9,10 @@ fn main() {
     let x = &&Baz;
     let y = &Baz;
     y.to_owned() == **x;
+
+    let x = 0u32;
+    let y = U32Wrapper(x);
+    let _ = U32Wrapper::from(x) == y;
 }
 
 struct Foo;
@@ -51,3 +55,21 @@ impl std::borrow::Borrow<Foo> for Bar {
         &FOO
     }
 }
+
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+struct U32Wrapper(u32);
+impl From<u32> for U32Wrapper {
+    fn from(x: u32) -> Self {
+        Self(x)
+    }
+}
+impl PartialEq<u32> for U32Wrapper {
+    fn eq(&self, other: &u32) -> bool {
+        self.0 == *other
+    }
+}
+impl PartialEq<U32Wrapper> for u32 {
+    fn eq(&self, other: &U32Wrapper) -> bool {
+        *self == other.0
+    }
+}

tests/ui/cmp_owned/without_suggestion.stderr

@@ -13,7 +13,7 @@ LL |     y.to_owned() == **x;
    |     ^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating
 
 error: this creates an owned instance just for comparison
-  --> $DIR/without_suggestion.rs:18:9
+  --> $DIR/without_suggestion.rs:22:9
    |
 LL |         self.to_owned() == *other
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating