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Re: RFC: PATCH to gimplify_modify_expr_rhs to make return slot explicit

From: Mark Mitchell <mark at codesourcery dot com>
To: Jason Merrill <jason at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org, "Frank Ch. Eigler" <fche at redhat dot com>, Richard Henderson <rth at redhat dot com>
Date: Fri, 14 Jan 2005 18:02:41 -0800
Subject: Re: RFC: PATCH to gimplify_modify_expr_rhs to make return slot explicit
Organization: CodeSourcery, LLC
References: <xypvfa2giqj.fsf@miranda.boston.redhat.com>

Jason Merrill wrote:

Unfortunately, this will unnecessarily pessimize some code by adding an
additional copy of the return value when calling functions that don't use
the NRV optimization.  I don't see what to do about this.

Me neither. Hopefully, most functions will use NRV...

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304

References:
- RFC: PATCH to gimplify_modify_expr_rhs to make return slot explicit
  - From: Jason Merrill

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