Fix Bugzilla Issue 24504 - ImportC: Enum declarations with a mixture of int and uint literal values cause errors, when targeting Windows, when debug info generation is enabled. (#16385)

compiler/test/compilable/test24504.c

@@ -0,0 +1,10 @@
+// REQUIRED_ARGS: -os=windows -g
+// DISABLED: osx
+// This is disabled on macOS because ld complains about _main being undefined
+// when clang attempts to preprocess the C file.
+
+typedef enum
+{
+    HasIntAndUIntValuesInt = 0,
+    HasIntAndUIntValuesUInt = 0x80000000
+} HasIntAndUIntValues;