Add a test for a compiler crasher with -O -whole-module-optimization -sanitize=address

Author: kubamracek

test/Sanitizers/asan-globals-overwrite.swift

@@ -0,0 +1,18 @@
+// RUN: %target-run-simple-swift(-O -whole-module-optimization -sanitize=address)
+
+// REQUIRES: executable_test
+// REQUIRES: foundation
+// REQUIRES: asan_runtime
+
+import Foundation
+
+struct MyStruct {
+    let value = Data()
+}
+
+class MyClass: NSObject {
+    var x: Int = {
+        _ = MyStruct()
+        return 0
+    }()
+}