Simplify the generation of Objective-C setters, at least a little.

Use a more portable heuristic for deciding when to emit a single
atomic store;  it's possible that I've lost information here, but
I'm not sure how much of the logic before was intentionally arch-specific
and how much was just not quite consistent.

llvm-svn: 139468

1 files changed, 6 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 7d0d95141ab..aabd7703d0a 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -129,8 +129,12 @@ namespace CodeGen {
     /// The width of a pointer into the generic address space.
     unsigned char PointerWidthInBits;
 
-    /// The alignment of a pointer into the generic address space.
-    unsigned char PointerAlignInBytes;
+    /// The size and alignment of a pointer into the generic address
+    /// space.
+    union {
+      unsigned char PointerAlignInBytes;
+      unsigned char PointerSizeInBytes;
+    };
   };
 
 struct RREntrypoints {