2 files changed, 12 insertions, 1 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 35507b9921..af8d37a221 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -721,6 +721,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__sync_bool_compare_and_swap:
   case Builtin::BI__sync_lock_test_and_set:
   case Builtin::BI__sync_lock_release:
+  case Builtin::BI__sync_swap:
     assert(0 && "Shouldn't make it through sema");
   case Builtin::BI__sync_fetch_and_add_1:
   case Builtin::BI__sync_fetch_and_add_2:
@@ -860,6 +861,13 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
     return RValue::get(Result);
   }
 
+  case Builtin::BI__sync_swap_1:
+  case Builtin::BI__sync_swap_2:
+  case Builtin::BI__sync_swap_4:
+  case Builtin::BI__sync_swap_8:
+  case Builtin::BI__sync_swap_16:
+    return EmitBinaryAtomic(*this, Intrinsic::atomic_swap, E);
+
   case Builtin::BI__sync_lock_test_and_set_1:
   case Builtin::BI__sync_lock_test_and_set_2:
   case Builtin::BI__sync_lock_test_and_set_4:
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 105fb52ddb..e1adfd4839 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -180,6 +180,7 @@ Sema::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   case Builtin::BI__sync_bool_compare_and_swap:
   case Builtin::BI__sync_lock_test_and_set:
   case Builtin::BI__sync_lock_release:
+  case Builtin::BI__sync_swap:
     return SemaBuiltinAtomicOverloaded(move(TheCallResult));
   }
   
@@ -415,7 +416,8 @@ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
     BUILTIN_ROW(__sync_val_compare_and_swap),
     BUILTIN_ROW(__sync_bool_compare_and_swap),
     BUILTIN_ROW(__sync_lock_test_and_set),
-    BUILTIN_ROW(__sync_lock_release)
+    BUILTIN_ROW(__sync_lock_release),
+    BUILTIN_ROW(__sync_swap)
   };
 #undef BUILTIN_ROW
 
@@ -468,6 +470,7 @@ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
     NumFixed = 0;
     ResultType = Context.VoidTy;
     break;
+  case Builtin::BI__sync_swap: BuiltinIndex = 14; break;
   }
 
   // Now that we know how many fixed arguments we expect, first check that we