tree 532a178a3f2ddce1392bf3b0f65e1eb1d8895188
parent 76e580ab1c32495ae524bbced52af1e63540836b
author Jordan Rose <jordan_rose@apple.com> 1508945041 -0700
committer GitHub <noreply@github.com> 1508945041 -0700

Unnamed bitfields don't block constant evaluation of constexpr ctors (#136)

C++14 [dcl.constexpr]p4 states that in the body of a constexpr
constructor,

> every non-variant non-static data member and base class sub-object
  shall be initialized

However, [class.bit]p2 notes that

> Unnamed bit-fields are not members and cannot be initialized.

Therefore, we should make sure to filter them out of the check that
all fields are initialized.

Fixing this makes the constant evaluator a bit smarter, and
specifically allows constexpr constructors to avoid tripping
-Wglobal-constructors when the type contains unnamed bitfields.

Reviewed at https://reviews.llvm.org/D39035.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316408 91177308-0d34-0410-b5e6-96231b3b80d8