Richard Smith e10d304d20 PR11851 (and duplicates): Whenever a constexpr function is referenced, ...

instantiate it if it can be instantiated and implicitly define it if it can be
implicitly defined. This matches g++'s approach. Remove some cases from
SemaOverload which were marking functions as referenced when just planning how
overload resolution would proceed; such cases are not actually references.

llvm-svn: 167514

2012-11-07 01:14:25 +00:00

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