diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index b1a25dd4639..8f3c2649079 100644
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -2331,7 +2331,7 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
     if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(CLI.Callee)) {
       llvm::StringRef Sym = G->getGlobal()->getName();
       Function *F = G->getGlobal()->getParent()->getFunction(Sym);
-      if (F->hasFnAttribute("__Mips16RetHelper")) {
+      if (F && F->hasFnAttribute("__Mips16RetHelper")) {
         Mask = MipsRegisterInfo::getMips16RetHelperMask();
       }
     }
@@ -3262,7 +3262,7 @@ MipsTargetLowering::MipsCC::SpecialCallingConvType
     if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
       llvm::StringRef Sym = G->getGlobal()->getName();
       Function *F = G->getGlobal()->getParent()->getFunction(Sym);
-      if (F->hasFnAttribute("__Mips16RetHelper")) {
+      if (F && F->hasFnAttribute("__Mips16RetHelper")) {
         SpecialCallingConv = MipsCC::Mips16RetHelperConv;
       }
     }