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Re: [PATCH] Fix the one entry mem{{,p}cpy,move,set} optimization aliasing issues (PR middle-end/29272, take 2)

From: Mark Mitchell <mark at codesourcery dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org, "Joseph S. Myers" <joseph at codesourcery dot com>, Ian Lance Taylor <ian at airs dot com>
Date: Mon, 09 Oct 2006 15:41:40 -0700
Subject: Re: [PATCH] Fix the one entry mem{{,p}cpy,move,set} optimization aliasing issues (PR middle-end/29272, take 2)
References: <20060929075035.GQ20982@devserv.devel.redhat.com> <451D5AEA.4040401@codesourcery.com> <20061004102434.GR20982@devserv.devel.redhat.com> <4529E262.2050505@codesourcery.com> <20061009140130.GT20982@devserv.devel.redhat.com>

Jakub Jelinek wrote:

2006-10-09 Jakub Jelinek <jakub@redhat.com>
	PR middle-end/29272
	* builtins.c (var_decl_component_p): New function.
	(fold_builtin_memset, fold_builtin_memory_op): Restrict
	single entry optimization to variables and components thereof.
* gcc.c-torture/execute/20060930-2.c: New test.

OK. I agree that it's better to get this in, even if we're not quite sure if it's optimal.

Thanks,

--
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713

References:
- Re: [PATCH] Fix the one entry mem{{,p}cpy,move,set} optimization aliasing issues (PR middle-end/29272)
  - From: Jakub Jelinek
- Re: [PATCH] Fix the one entry mem{{,p}cpy,move,set} optimization aliasing issues (PR middle-end/29272)
  - From: Mark Mitchell
- [PATCH] Fix the one entry mem{{,p}cpy,move,set} optimization aliasing issues (PR middle-end/29272, take 2)
  - From: Jakub Jelinek

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