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Re: [PATCH] c++/78765

From: Jason Merrill <jason at redhat dot com>
To: Nathan Sidwell <nathan at acm dot org>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 4 Jan 2017 00:40:22 -0500
Subject: Re: [PATCH] c++/78765
Authentication-results: sourceware.org; auth=none
References: <af30b5d3-07a7-78e2-d0ea-930cc5e00ae6@acm.org>

On 12/16/2016 07:23 AM, Nathan Sidwell wrote:

when cxx_eval_constant_expression finds a nonconstant expression it
returns a TREE without TREE_CONSTANT set.
  else if (non_constant_p && TREE_CONSTANT (r))
  {
      /* This isn't actually constant, so unset TREE_CONSTANT.  */
      ...
     else // THIS CASE HAPPENS
    r = build_nop (TREE_TYPE (r), r);
      TREE_CONSTANT (r) = false;
   }

Hmm, we shouldn't get here for an expression we're going to use as anlvalue.


Jason

Follow-Ups:
- Re: [PATCH] c++/78765
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