test(clang-cl): bitfield & struct padding

Author: theomagellan

clang/test/Driver/windows-Wpadded.cpp

@@ -0,0 +1,11 @@
+// RUN: %clang_cl -Wpadded -Wno-msvc-not-found -fsyntax-only -- %s 2>&1 | FileCheck -check-prefix=WARN %s
+
+struct Foo {
+  int b : 1;
+  char a;
+};
+
+int main () {Foo foo;}
+
+// WARN: warning: padding struct 'Foo' with 31 bits to align 'a'
+// WARN: warning: padding size of 'Foo' with 3 bytes to alignment boundary