[PATCH] D48040: Implement constexpr __builtin_*_overflow

[Erich Keane via Phabricator via cfe-commits]

erichkeane created this revision.
erichkeane added reviewers: eli.friedman, rjmccall.

As requested here:https://bugs.llvm.org/show_bug.cgi?id=37633

permit the __builtin_*_overflow builtins in constexpr functions.


Repository:
  rC Clang

https://reviews.llvm.org/D48040

Files:
  lib/AST/ExprConstant.cpp
  lib/Sema/SemaChecking.cpp
  test/SemaCXX/builtins-overflow.cpp

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