[clang] [Clang][Wswitch-default] Warning for enum even completely covered the cases (PR #75900)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: None (hstk30-hw)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/75900.diff


1 Files Affected:

- (modified) clang/test/Sema/switch-default.c (+11) 


``````````diff
diff --git a/clang/test/Sema/switch-default.c b/clang/test/Sema/switch-default.c
index 854b561b37c48e..342a97ee68b1e2 100644
--- a/clang/test/Sema/switch-default.c
+++ b/clang/test/Sema/switch-default.c
@@ -15,3 +15,14 @@ int f2(int a) {
   }
   return a;
 }
+
+// Warn even completely covered Enum cases(GCC compatibility).
+enum E { A, B };
+enum E check_enum(enum E e) {
+  switch (e) {                // expected-warning {{'switch' missing 'default' label}}
+    case A: break;
+    case B: break;
+  }
+  return e;
+}
+

``````````

</details>


https://github.com/llvm/llvm-project/pull/75900