bricci added a comment.

It seems to me that the increased size of DeclarationNameTable is irrelevant 
since it is
only used as a member in ASTContext and never copied nor moved from. Also,
at least for C++ it seems to me that this structure is never "rarely used" 
since it is
used for every overloaded op/ctor/dtor (but I admit that I am not familiar with 
Sema)

I will do a comparison of the build time this evening. If this is a problem we 
can try to
find a way to avoid the QualType in CXXSpecialName (which is the reason why we 
need
Type.h) by replacing it by uintptr_t and doing some casts.


Repository:
  rC Clang

https://reviews.llvm.org/D50261



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