Introduce and use convenience methods for getting pointer types
where the element is of a basic builtin type.  For example, to get
an i8* use getInt8PtrTy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83379 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/LowerAllocations.cpp b/lib/Transforms/Utils/LowerAllocations.cpp
index 2df953c..f26d7c1 100644
--- a/lib/Transforms/Utils/LowerAllocations.cpp
+++ b/lib/Transforms/Utils/LowerAllocations.cpp
@@ -87,7 +87,7 @@
 // This function is always successful.
 //
 bool LowerAllocations::doInitialization(Module &M) {
-  const Type *BPTy = PointerType::getUnqual(Type::getInt8Ty(M.getContext()));
+  const Type *BPTy = Type::getInt8PtrTy(M.getContext());
   FreeFunc = M.getOrInsertFunction("free"  , Type::getVoidTy(M.getContext()),
                                    BPTy, (Type *)0);
   return true;
@@ -123,7 +123,7 @@
     } else if (FreeInst *FI = dyn_cast<FreeInst>(I)) {
       Value *PtrCast = 
         new BitCastInst(FI->getOperand(0),
-               PointerType::getUnqual(Type::getInt8Ty(BB.getContext())), "", I);
+               Type::getInt8PtrTy(BB.getContext()), "", I);
 
       // Insert a call to the free function...
       CallInst::Create(FreeFunc, PtrCast, "", I)->setTailCall();