Retire llvm::alignOf in favor of C++11 alignof.

No functionality change intended.

llvm-svn: 284730
diff --git a/clang/lib/AST/StmtCXX.cpp b/clang/lib/AST/StmtCXX.cpp
index 4692db8..4a04fc2 100644
--- a/clang/lib/AST/StmtCXX.cpp
+++ b/clang/lib/AST/StmtCXX.cpp
@@ -28,7 +28,7 @@
   std::size_t Size = sizeof(CXXTryStmt);
   Size += ((handlers.size() + 1) * sizeof(Stmt *));
 
-  void *Mem = C.Allocate(Size, llvm::alignOf<CXXTryStmt>());
+  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
   return new (Mem) CXXTryStmt(tryLoc, tryBlock, handlers);
 }
 
@@ -37,7 +37,7 @@
   std::size_t Size = sizeof(CXXTryStmt);
   Size += ((numHandlers + 1) * sizeof(Stmt *));
 
-  void *Mem = C.Allocate(Size, llvm::alignOf<CXXTryStmt>());
+  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
   return new (Mem) CXXTryStmt(Empty, numHandlers);
 }