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Re: Structure Return Testcase

To: Jeffrey A Law <law at redhat dot com>
Subject: Re: Structure Return Testcase
From: Richard Henderson <rth at redhat dot com>
Date: Thu, 15 Mar 2001 12:50:14 -0800
Cc: "Joseph S. Myers" <jsm28 at cam dot ac dot uk>, gcc at gcc dot gnu dot org
References: <Pine.LNX.4.32.0103151901200.20427-100000@kern.srcf.societies.cam.ac.uk> <4642.984684417@slagheap.cygnus.com>

> OK.  Ouch.  This likely means we're going to end up doing double copies for
> most/all structure returns or using memmove which isn't too efficient either. 

Incidentally, there is an outstanding patch from Loren James Rittle

  http://gcc.gnu.org/ml/gcc-patches/2001-03/msg00272.html

to use memmove for this instance.  He keys the use of memmove on
seeing a RESULT_DECL, but it seems much cleaner to generate something
other than a MODIFY_EXPR with the proper semantics.


r~

Follow-Ups:
- Re: Structure Return Testcase
  - From: Jeffrey A Law
- Re: Structure Return Testcase
  - From: Loren James Rittle

References:
- Re: Structure Return Testcase
  - From: Joseph S. Myers
- Re: Structure Return Testcase
  - From: Jeffrey A Law

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