This is the mail archive of the libc-alpha@sourceware.org mailing list for the glibc project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Fix strict-aliasing warnings from unwind-dw2-fde.c

From: Roland McGrath <roland at hack dot frob dot com>
To: "Joseph S. Myers" <joseph at codesourcery dot com>
Cc: Jeff Law <law at redhat dot com>, <libc-alpha at sourceware dot org>
Date: Mon, 26 Nov 2012 15:03:30 -0800 (PST)
Subject: Re: Fix strict-aliasing warnings from unwind-dw2-fde.c
References: <Pine.LNX.4.64.1211211703010.16302@digraph.polyomino.org.uk><50AD0B17.7020703@redhat.com><20121121190502.176082C0CC@topped-with-meat.com><Pine.LNX.4.64.1211212223240.11924@digraph.polyomino.org.uk>

> That's the intention of my patch - use memcpy, in an inline function so 
> the compiler can see everything and optimize to the same code as for type 
> punning as appropriate.

Please verify that the change does not change the compiled code for x86-64.
If it doesn't change the code, or any changes don't reduce performance,
then this is OK.

Follow-Ups:
- Re: Fix strict-aliasing warnings from unwind-dw2-fde.c
  - From: Joseph S. Myers

References:
- Fix strict-aliasing warnings from unwind-dw2-fde.c
  - From: Joseph S. Myers
- Re: Fix strict-aliasing warnings from unwind-dw2-fde.c
  - From: Jeff Law
- Re: Fix strict-aliasing warnings from unwind-dw2-fde.c
  - From: Roland McGrath
- Re: Fix strict-aliasing warnings from unwind-dw2-fde.c
  - From: Joseph S. Myers

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]