yronglin added a comment.

In D133583#3792625 <https://reviews.llvm.org/D133583#3792625>, @aaron.ballman 
wrote:

> In D133583#3780460 <https://reviews.llvm.org/D133583#3780460>, @yronglin 
> wrote:
>
>> Hi, follow D133202 <https://reviews.llvm.org/D133202> , should I both fix 
>> alignment in this patch or in another separate patch? (this seems have 
>> different behavior with gcc https://godbolt.org/z/7dvM8zhnh )
>
> I think that's a separate patch -- this one is fixing a mistake with the 
> type-checking related crash fix and the other is about the behavior of the 
> expression itself when it's valid.
>
> The current patch looks reasonable to me, but I'd love a second opinion.

Thanks for your comments @aaron.ballman



================
Comment at: clang/test/Sema/builtin-redecl.cpp:5-6
 
+#include <stddef.h>
+
 // Redeclaring library builtins is OK.
----------------
aaron.ballman wrote:
> We can be tricky instead of including a header file.
Use `decltype` not works in C , can we use `typedef unsigned long size_t 
`instead? 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133583/new/

https://reviews.llvm.org/D133583

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