Remove the return type check for llvm.readio.  This check is done for all
functions and is not needed here.
Simplify the pointer type check per Chris's suggestions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12945 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index 89017d6..ffe2c5a 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -644,11 +644,10 @@
 
     Assert1(FT->getNumParams() == 1,
             "Illegal # arguments for intrinsic function!", IF);
-    Assert1(ReturnType->isFirstClassType(),
-            "Return type is not a first class type!", IF);
-    Assert1(ParamType->getPrimitiveID() == Type::PointerTyID,
+    Assert1(isa<PointerType>(ParamType),
             "First argument not a pointer!", IF);
-    Assert1(((dyn_cast<PointerType>(ParamType)->getContainedType(0)) == ReturnType), "Pointer type doesn't match return type!", IF);
+    Assert1(((cast<PointerType>(ParamType)->getElementType()) == ReturnType),
+            "Pointer type doesn't match return type!", IF);
     NumArgs = 1;
     break;
   }