Fixed a bug in the IR transformer where we were
trying to do replaceUsesOfWith on a constant,
which doesn't work.  Turns out we don't need to
do anything for constants.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@109477 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/IRForTarget.cpp b/source/Expression/IRForTarget.cpp
index e201117..ce28a8f 100644
--- a/source/Expression/IRForTarget.cpp
+++ b/source/Expression/IRForTarget.cpp
@@ -186,7 +186,16 @@
     for (ui = guard_load->use_begin();
          ui != guard_load->use_end();
          ++ui)
-        ui->replaceUsesOfWith(guard_load, zero);
+    {
+        if (isa<Constant>(ui))
+        {
+            // do nothing for the moment
+        }
+        else
+        {
+            ui->replaceUsesOfWith(guard_load, zero);
+        }
+    }
     
     guard_load->eraseFromParent();
 }