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C++ PATCH to defer folding of *&

From: Jason Merrill <jason at redhat dot com>
To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Mon, 13 Nov 2017 16:47:39 -0500
Subject: C++ PATCH to defer folding of *&
Authentication-results: sourceware.org; auth=none

While working on another issue, I noticed that cp_build_indirect_ref
was still folding away *&, which is incorrect because (int)*&var is an
odr-use of var, whereas (int)var may not be.

However, many of the existing users of cp_build_indirect_ref don't
care about that distinction, and indeed rely on the folding, so I've
introduce cp_build_fold_indirect_ref for such users.  This function
replaces most of the calls to cp_build_indirect_ref with a RO_NULL
argument; the others are corrected to use the right RO_ argument
instead.

This patch revealed a typo bug in cp-ubsan, which I've also fixed.

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

Attachment: ind-addr.diff
Description: Text document

Attachment: ind-addr-ubsan.diff
Description: Text document

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