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Re: RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)

From: Jason Merrill <jason at redhat dot com>
To: Richard Guenther <richard dot guenther at gmail dot com>
Cc: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Mon, 23 May 2011 11:38:15 -0400
Subject: Re: RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)
References: <4DDA743A.7000604@redhat.com> <BANLkTinzwJPMT5Hbg7Zxr56YmKOk6gDskQ@mail.gmail.com>

On 05/23/2011 11:01 AM, Richard Guenther wrote:

Ok.  Though I wonder where you enter folding before you check semantic
validity.

The problem is in c-common:shorten_binary_op, which uses get_narrower and then calls common_type on the types of the results. There is no common type between a scoped enum and char, so common_type returns NULL_TREE, so we get a SEGV in c_common_signed_or_unsigned_type.

Do you think I should change shorten_binary_op instead?

Jason

Follow-Ups:
- Re: RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)
  - From: Richard Guenther
- Re: RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)
  - From: Jason Merrill

References:
- RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)
  - From: Jason Merrill
- Re: RFA PATCH to get_narrower for c++/48106 (ICE with scoped enum)
  - From: Richard Guenther

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