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Re: [PATCH, x86] Use vector moves in memmove expanding

From: "Michael V. Zolotukhin" <michael dot v dot zolotukhin at gmail dot com>
To: "H.J. Lu" <hjl dot tools at gmail dot com>
Cc: Eric Botcazou <ebotcazou at adacore dot com>, Kirill Yukhin <kirill dot yukhin at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Jan Hubicka <hubicka at ucw dot cz>, Ond??ej B?lka <neleai at seznam dot cz>, Uros Bizjak <ubizjak at gmail dot com>
Date: Mon, 9 Sep 2013 11:23:17 +0400
Subject: Re: [PATCH, x86] Use vector moves in memmove expanding
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References: <CAMe9rOrRaZANTPLZQxv8j-V5Ozy75M4d80oCC-rZRT0xQ4a=Rw at mail dot gmail dot com> <20130705112534 dot GA10164 at kam dot mff dot cuni dot cz> <CAGs3Rfs86yLj3-1HkAMnkf4ey87cZgiqajLAH=WC9mpg6OJLiw at mail dot gmail dot com> <7703907 dot JSoGtmLQkn at polaris> <CAMe9rOrphfykcfD5FApBH-Bp-Wuu8eu7qFQ+256fMgdT0WJcAA at mail dot gmail dot com> <CANtU079EYp6MH1ZhXVFk9gtC19dCMq37tDer8unwqh65fKy-pg at mail dot gmail dot com>

Hi HJ,
You were right, and the change from epilogue_size_needed to size_needed was the
rootcause of the bug.
Here is the obvious fix for that, regtested and bootstrapped on i386/x86_64.

Is it OK for trunk?

Changelog:
2013-09-09  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>

	* config/i386/i386.c (ix86_expand_movmem): Fix epilogue generation.

---
Thanks, Michael

Attachment: memcpy_epilogue_fix.patch
Description: Text document

Follow-Ups:
- Re: [PATCH, x86] Use vector moves in memmove expanding
  - From: Jan Hubicka

References:
- Re: [PATCH, x86] Use vector moves in memmove expanding
  - From: Eric Botcazou
- Re: [PATCH, x86] Use vector moves in memmove expanding
  - From: H.J. Lu
- Re: [PATCH, x86] Use vector moves in memmove expanding
  - From: Michael Zolotukhin

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