[PATCH] D50631: [AST] Stuff more data into FunctionTypeBitfields

[Bruno Ricci via Phabricator via cfe-commits]

riccibruno created this revision.
riccibruno added reviewers: erichkeane, rjmccall.
riccibruno added a project: clang.
Herald added a subscriber: cfe-commits.

Since FunctionTypeBitfields is already > 32 bits wide we might
as well stuff the remaining bits from FunctionProtoType into it.

The patch is very mechanical, but changes the maximum number of
parameters from 2^15-1 to 2^12-1 to fit into FunctionTypeBitfields.
This seems still large enough, and in any case according to the
annex B of the C++ standard we only need to be able to accept
256 parameters.

Also the member `unsigned RefQualifier : 2;` is moved in 
FunctionTypeBitfields. This is intentional and done to avoid
the unsigned boundary.


Repository:
  rC Clang

https://reviews.llvm.org/D50631

Files:
  include/clang/AST/Type.h
  lib/AST/Type.cpp

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