[PATCH] D56368: [AST] Store the results in OverloadExpr in a trailing array

[Bruno Ricci via Phabricator via cfe-commits]

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

Use the newly available space in the bit-fields of `Stmt` to pack
`OverloadExpr`, `UnresolvedLookupExpr` and `UnresolvedMemberExpr`.

Additionally store the results in the overload set in a trailing array.
This saves 1 pointer + 8 bytes per `UnresolvedLookupExpr` and `UnresolvedMemberExpr`.


Repository:
  rC Clang

https://reviews.llvm.org/D56368

Files:
  include/clang/AST/ExprCXX.h
  include/clang/AST/Stmt.h
  lib/AST/ExprCXX.cpp
  lib/Serialization/ASTReaderStmt.cpp
  lib/Serialization/ASTWriterStmt.cpp

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