Bruno Ricci 023b1d19f3 [AST] Only store data for the NRVO candidate in ReturnStmt if needed ...

Only store the NRVO candidate if needed in ReturnStmt.
A good chuck of all of the ReturnStmt have no NRVO candidate
(more than half when parsing all of Boost). For all of them
this saves one pointer. This has no impact on children().

Differential Revision: https://reviews.llvm.org/D53716

Reviewed By: rsmith

llvm-svn: 345605

2018-10-30 14:40:49 +00:00

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