PNaCl: Add ReplacePtrsWithInts pass for stripping out pointer types

lib/Transforms/NaCl/ExpandUtils.cpp

Index: lib/Transforms/NaCl/ExpandUtils.cpp
diff --git a/lib/Transforms/NaCl/ExpandUtils.cpp b/lib/Transforms/NaCl/ExpandUtils.cpp
index 0670ff75ce1e737cbac1378363a23b69201d7cc8..507760603f56a3ea3496b8d95cb7ce2a1fd718ab 100644
--- a/lib/Transforms/NaCl/ExpandUtils.cpp
+++ b/lib/Transforms/NaCl/ExpandUtils.cpp
@@ -38,3 +38,8 @@ void llvm::PhiSafeReplaceUses(Use *U, Value *NewVal) {
     U->getUser()->replaceUsesOfWith(U->get(), NewVal);
   }
 }
+
+Instruction *llvm::CopyDebug(Instruction *NewInst, Instruction *Original) {
+  NewInst->setDebugLoc(Original->getDebugLoc());
+  return NewInst;
+}