This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC 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: [patch] Optimize empty class copies within a C++ return statement

From: Jason Merrill <jason at redhat dot com>
To: Aldy Hernandez <aldyh at redhat dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 11 Mar 2015 08:06:43 -0400
Subject: Re: [patch] Optimize empty class copies within a C++ return statement
Authentication-results: sourceware.org; auth=none
References: <54F8E5D3 dot 4050607 at redhat dot com> <54F94715 dot 4000208 at redhat dot com> <54F9D396 dot 3000400 at redhat dot com> <54FA2046 dot 9090500 at redhat dot com> <54FA21FD dot 9040609 at redhat dot com> <54FA23B4 dot 3090402 at redhat dot com> <54FA23D7 dot 3030301 at redhat dot com> <54FDE762 dot 6040409 at redhat dot com> <54FE5C13 dot 4050904 at redhat dot com> <54FF7A00 dot 7060705 at redhat dot com> <54FF8560 dot 2080502 at redhat dot com> <54FF8730 dot 1080009 at redhat dot com> <54FF9266 dot 4050903 at redhat dot com> <54FF9E29 dot 8030704 at redhat dot com>

On 03/10/2015 09:45 PM, Aldy Hernandez wrote:

+	    gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,

...

+	    *expr_p = TREE_OPERAND (*expr_p, 0);


Can't you use op0 here, since you're about to throw away the MODIFY_EXPR?

OK either way.

Jason

References:
- [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Jason Merrill
- Re: [patch] Optimize empty class copies within a C++ return statement
  - From: Aldy Hernandez

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