Added the skeleton of an IR transformer that will

prepare IR for execution in the target.  Wired the
expression command to use this IR transformer when
conversion to DWARF fails, and wired conversion to
DWARF to always fail (well, we don't generate any
DWARF...)

llvm-svn: 107559

1 files changed, 19 insertions, 1 deletions

diff --git a/lldb/source/Commands/CommandObjectExpression.cpp b/lldb/source/Commands/CommandObjectExpression.cpp
index 64106eda2d0..37659f5e697 100644
--- a/lldb/source/Commands/CommandObjectExpression.cpp
+++ b/lldb/source/Commands/CommandObjectExpression.cpp
@@ -252,11 +252,29 @@ CommandObjectExpression::EvaluateExpression (const char *expr, bool bare, Stream
     ClangExpressionVariableList expr_local_vars;
 
     bool success;
+    bool canInterpret = false;
     
     if (m_options.use_ir)
-        success = (clang_expr.ConvertIRToDWARF (expr_local_vars, dwarf_opcodes) == 0);
+    {
+        canInterpret = clang_expr.ConvertIRToDWARF (expr_local_vars, dwarf_opcodes);
+        
+        if (canInterpret)
+        {
+            if (log)
+                log->Printf("Code can be interpreted.");
+            success = true;
+        }
+        else
+        {
+            if (log)
+                log->Printf("Code cannot be interpreted and must be run in the target.");
+            success = clang_expr.PrepareIRForTarget (expr_local_vars);
+        }
+    }
     else
+    {
         success = (clang_expr.ConvertExpressionToDWARF (expr_local_vars, dwarf_opcodes) == 0);
+    }
     
     if (!success)
     {