Remove host endianness info from TargetData and

put it in a new header System/Host.h instead.
Instead of getting the endianness from configure,
calculate it directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44959 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/System/Host.h

@@ -0,0 +1,36 @@
+//===- llvm/System/Host.h - Host machine characteristics --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Duncan Sands and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Methods for querying the nature of the host machine.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYSTEM_HOST_H
+#define LLVM_SYSTEM_HOST_H
+
+namespace llvm {
+namespace sys {
+
+  inline bool littleEndianHost() {
+    union {
+      int i;
+      char c;
+    };
+    i = 1;
+    return c;
+  }
+
+  inline bool bigEndianHost() {
+    return !littleEndianHost();
+  }
+
+}
+}
+
+#endif