yaxunl added a comment.

In https://reviews.llvm.org/D23086#516365, @Anastasia wrote:

> Why not to just identify the type by the name? It seems much easier and also 
> gives flexibility to implement the type in different ways if needed. 
> Considering that similar approach is already used for some C++ types, it 
> should be fine.


This does not work. For example, user could define

  typedef ndrange_t my_ndrange_t;

and pass a variable X of type my_ndrange_t to enqueue_kernel. If we identify 
ndrange_t by type name, X would be identified as not an ndrange_t type and an 
error will be emitted, which is wrong. Therefore we have to check the canonical 
type.


Repository:
  rL LLVM

https://reviews.llvm.org/D23086



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