Fix some problems where the verifier would crash on invalid input instead of

reporting the problem and exiting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20302 91177308-0d34-0410-b5e6-96231b3b80d8

lib/VMCore/Verifier.cpp

@@ -592,6 +592,7 @@ void Verifier::visitInstruction(Instruction &I) {
   for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
     // Check to make sure that the "address of" an intrinsic function is never
     // taken.
+    Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
     if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
       Assert1(!F->isIntrinsic() || (i == 0 && isa<CallInst>(I)),
               "Cannot take the address of an intrinsic!", &I);