Use const iterators where possible.  Patch by Evan Jones!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20354 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index d6fb171..f594827 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -494,7 +494,7 @@
   
   // Loop over all of the global variables in the program, allocating the memory
   // to hold them.
-  for (Module::giterator I = getModule().gbegin(), E = getModule().gend();
+  for (Module::const_giterator I = getModule().gbegin(), E = getModule().gend();
        I != E; ++I)
     if (!I->isExternal()) {
       // Get the type of the global...
@@ -518,7 +518,7 @@
   
   // Now that all of the globals are set up in memory, loop through them all and
   // initialize their contents.
-  for (Module::giterator I = getModule().gbegin(), E = getModule().gend();
+  for (Module::const_giterator I = getModule().gbegin(), E = getModule().gend();
        I != E; ++I)
     if (!I->isExternal())
       EmitGlobalVariable(I);