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Re: [PATCH] Mark DECL_SET_IS_OPERATOR_DELETE for user-provided delete operators.

From: Jason Merrill <jason at redhat dot com>
To: Martin Liška <mliska at suse dot cz>, gcc-patches at gcc dot gnu dot org
Cc: Marc Glisse <marc dot glisse at inria dot fr>
Date: Thu, 1 Aug 2019 12:16:00 -0400
Subject: Re: [PATCH] Mark DECL_SET_IS_OPERATOR_DELETE for user-provided delete operators.
References: <df0719d3-510f-fb67-cbb2-82dad7d9d9a1@suse.cz>

OK.

On 8/1/19 9:12 AM, Martin Liška wrote:

Hi.

As discussed with Marc, I'm suggesting to mark user-provided
delete operators with DECL_SET_IS_OPERATOR_DELETE in order to allow
possible DCE for it. I've checked that clang can also optimize that
situation out.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

gcc/cp/ChangeLog:

2019-07-30  Martin Liska  <mliska@suse.cz>

	* decl.c (grok_op_properties):
	Mark DECL_SET_IS_OPERATOR_DELETE for user-provided delete operators.

gcc/testsuite/ChangeLog:

2019-07-30  Martin Liska  <mliska@suse.cz>

	* g++.dg/cpp1y/new2.C: New test.
---
  gcc/cp/decl.c                     |  5 +++-
  gcc/testsuite/g++.dg/cpp1y/new2.C | 39 +++++++++++++++++++++++++++++++
  2 files changed, 43 insertions(+), 1 deletion(-)
  create mode 100644 gcc/testsuite/g++.dg/cpp1y/new2.C

References:
- [PATCH] Mark DECL_SET_IS_OPERATOR_DELETE for user-provided delete operators.
  - From: Martin Liška

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