Improve -Wshadow warnings with enumerators.

Addresses PR24718 by checking for enumerators that shadow other enumerators. Catches issues like:

enum E1{e1};
void f(void) {
  enum E2{e1};
}

llvm-svn: 344259

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/test/Sema/warn-shadow.c b/clang/test/Sema/warn-shadow.c
index 32aca8d612b..8d1d0aed693 100644
--- a/clang/test/Sema/warn-shadow.c
+++ b/clang/test/Sema/warn-shadow.c
@@ -59,3 +59,8 @@ void rdar8883302() {
 void test8() {
   int bob; // expected-warning {{declaration shadows a variable in the global scope}}
 }
+
+enum PR24718_1{pr24718}; // expected-note {{previous declaration is here}}
+void PR24718(void) {
+  enum PR24718_2{pr24718}; // expected-warning {{declaration shadows a variable in the global scope}}
+}