Parse/Sema: Add support for '#pragma options align=packed', which, it should be
noted, is not the same as __attribute__((packed)). That would be ridiculous!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104865 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaAttr.cpp b/lib/Sema/SemaAttr.cpp
index c540af2..fcf5bfd 100644
--- a/lib/Sema/SemaAttr.cpp
+++ b/lib/Sema/SemaAttr.cpp
@@ -146,6 +146,13 @@
     Context->setAlignment(0);
     break;
 
+    // Note that '#pragma options align=packed' is not equivalent to attribute
+    // packed, it has a different precedence relative to attribute aligned.
+  case POAK_Packed:
+    Context->push(0);
+    Context->setAlignment(1);
+    break;
+
   case POAK_Mac68k:
     // Check if the target supports this.
     if (!PP.getTargetInfo().hasAlignMac68kSupport()) {