[PATCH] Make ExecutionEngine::getPointerToGlobal understand GlobalAlias

[Yaron Keren]

ExecutionEngine::getPointerToGlobal gets to unreachable if passed a GlobalAlias.

http://reviews.llvm.org/D4245

Files:
  lib/ExecutionEngine/ExecutionEngine.cpp

Index: lib/ExecutionEngine/ExecutionEngine.cpp
===================================================================
--- lib/ExecutionEngine/ExecutionEngine.cpp
+++ lib/ExecutionEngine/ExecutionEngine.cpp
@@ -865,6 +865,9 @@
     report_fatal_error(OS.str());
   }
 
+  if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(C))
+    return getConstantValue(GA->getAliasee());
+
   // Otherwise, we have a simple constant.
   GenericValue Result;
   switch (C->getType()->getTypeID()) {
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