Replace all usages of Type::isPointerType with isa<PointerType>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2486 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index 8479c6c..0df9520 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -61,10 +61,10 @@
 				      void *D) {
   const TargetData &TD = *(const TargetData*)D;
   assert(AID == TD.AID && "Target data annotation ID mismatch!");
-  const Type *Ty = cast<const Type>((const Value *)T);
-  assert(Ty->isStructType() && 
+  const Type *Ty = cast<Type>((const Value *)T);
+  assert(isa<StructType>(Ty) && 
 	 "Can only create StructLayout annotation on structs!");
-  return new StructLayout((const StructType *)Ty, TD);
+  return new StructLayout(cast<StructType>(Ty), TD);
 }
 
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