Bugfixes to the expression parser.  Fixes include:

 - If you put a semicolon at the end of an expression,
   this no longer causes the expression parser to
   error out.  This was a two-part fix: first,
   ClangExpressionDeclMap::Materialize now handles
   an empty struct (such as when there is no return
   value); second, ASTResultSynthesizer walks backward
   from the end of the ASTs until it reaches something
   that's not a NullStmt.

 - ClangExpressionVariable now properly byte-swaps when
   printing itself.

 - ClangUtilityFunction now cleans up after itself when
   it's done compiling itself.

 - Utility functions can now use external functions just
   like user expressions.

 - If you end your expression with a statement that does
   not return a value, the expression now runs correctly
   anyway.

Also, added the beginnings of an Objective-C object
validator function, which is neither installed nor used
as yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@113789 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangExpressionVariable.cpp b/source/Expression/ClangExpressionVariable.cpp
index d576578..3931cfb 100644
--- a/source/Expression/ClangExpressionVariable.cpp
+++ b/source/Expression/ClangExpressionVariable.cpp
@@ -18,6 +18,8 @@
 #include "lldb/Core/DataExtractor.h"
 #include "lldb/Core/Stream.h"
 #include "lldb/Core/Value.h"
+#include "lldb/Target/ExecutionContext.h"
+#include "lldb/Target/Process.h"
 
 using namespace lldb_private;
 using namespace clang;
@@ -79,6 +81,12 @@
     DataExtractor data;
     Error expr_error = val.GetValueAsData (&exe_ctx, ast_context, data, 0);
     
+    
+    // Set byte order and pointer size to TARGET byte order and pointer size!
+    
+    data.SetByteOrder(exe_ctx.process->GetByteOrder());
+    data.SetAddressByteSize(exe_ctx.process->GetAddressByteSize());
+    
     if (!expr_error.Success ())
     {
         err.SetErrorToGenericError ();