Roll out ASTContext::getTypeSizeInChars(), replacing instances of

"ASTContext::getTypeSize() / 8". Replace [u]int64_t variables with CharUnits
ones as appropriate. 

Also rename RawType, fromRaw(), and getRaw() in CharUnits to QuantityType, 
fromQuantity(), and getQuantity() for clarity.

llvm-svn: 93153

clang/lib/CodeGen/CodeGenFunction.cpp

@@ -578,7 +578,7 @@ llvm::Value *CodeGenFunction::EmitVLASize(QualType Ty) {
         ElemSize = EmitVLASize(ElemTy);
       else
         ElemSize = llvm::ConstantInt::get(SizeTy,
-                                          getContext().getTypeSize(ElemTy) / 8);
+            getContext().getTypeSizeInChars(ElemTy).getQuantity());
 
       llvm::Value *NumElements = EmitScalarExpr(VAT->getSizeExpr());
       NumElements = Builder.CreateIntCast(NumElements, SizeTy, false, "tmp");