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C++ PATCH for c++/77945 (constexpr copy and tail padding)

From: Jason Merrill <jason at redhat dot com>
To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Sat, 15 Oct 2016 17:25:41 -0400
Subject: C++ PATCH for c++/77945 (constexpr copy and tail padding)
Authentication-results: sourceware.org; auth=none

For classes with trivial copy constructors that might have other data
packed into their tail padding, we represent the copy with an
assignment between arrays of unsigned char.  This is valid in normal
code, but constant expressions don't allow that sort of type punning,
so we need to look through it.

Tested x86_64-pc-linux-gnu, applying to trunk.

Attachment: 77945.diff
Description: Text document

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