Fix forwarding of -fpack-struct from driver to CC1, and add a test.
-fpack-struct's handling has changed in CC1 (one of only two flags that needed changing) because the driver treats "-fpack-struct" as a boolean flag, and CC1 (did) treat it as an option with a separated value.
This change causes -fpack-struct=X to be forwarded correctly to -fpack-struct=X instead of erroneously to "-fpack-struct X"
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155981 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/fpack-struct.c b/test/Driver/fpack-struct.c
new file mode 100644
index 0000000..cc75da5
--- /dev/null
+++ b/test/Driver/fpack-struct.c
@@ -0,0 +1,10 @@
+// RUN: %clang -fpack-struct -### %s 2> %t
+// RUN: FileCheck < %t %s
+// RUN: %clang -fpack-struct=8 -### %s 2> %t
+// RUN: FileCheck < %t %s --check-prefix=EQ
+
+// CHECK: "-cc1"
+// CHECK: "-fpack-struct=1"
+
+// CHECK-EQ: "-cc1"
+// CHECK-EQ: "-fpack-struct=8"