Add const qualifiers to CodeGen's use of LLVM IR constructs.

llvm-svn: 101334
diff --git a/llvm/lib/CodeGen/IntrinsicLowering.cpp b/llvm/lib/CodeGen/IntrinsicLowering.cpp
index f53feab..e1c52f7 100644
--- a/llvm/lib/CodeGen/IntrinsicLowering.cpp
+++ b/llvm/lib/CodeGen/IntrinsicLowering.cpp
@@ -331,7 +331,7 @@
   IRBuilder<> Builder(CI->getParent(), CI);
   LLVMContext &Context = CI->getContext();
 
-  Function *Callee = CI->getCalledFunction();
+  const Function *Callee = CI->getCalledFunction();
   assert(Callee && "Cannot lower an indirect call!");
 
   switch (Callee->getIntrinsicID()) {