It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/MappedFile.cpp b/lib/System/MappedFile.cpp
new file mode 100644
index 0000000..41b5946
--- /dev/null
+++ b/lib/System/MappedFile.cpp
@@ -0,0 +1,35 @@
+//===- MappedFile.cpp - MappedFile Support ----------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Reid Spencer and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the mapped file concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/System/MappedFile.h"
+#include "llvm/Config/config.h"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//=== independent code.
+//===----------------------------------------------------------------------===//
+
+}
+
+// Include the platform-specific parts of this class.
+#ifdef LLVM_ON_UNIX
+#include "Unix/MappedFile.inc"
+#endif
+#ifdef LLVM_ON_WIN32
+#include "Win32/MappedFile.inc"
+#endif
+
+DEFINING_FILE_FOR(SystemMappedFile)