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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/46888] missed optimization of zero_extract with constant inputs
Date: Tue, 13 Nov 2012 01:19:00 -0000	[thread overview]
Message-ID: <bug-46888-4-D0O6ow84iY@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-46888-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46888

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-11-13 01:18:52 UTC ---
http://gcc.gnu.org/ml/gcc-patches/2012-11/msg00952.html
Will improve the testcase at the tree level for little-endian:
  _4 = (unsigned char) a_3(D);
  _5 = (<unnamed-unsigned:5>) _4;
  BIT_FIELD_REF <D.1727, 10, 0> = 65;
  D.1727.c = 3;
  D.1727.d = _5;
  return D.1727;

And will fix it on big-endian:
  D.1354_2 = (unsigned char) a_1(D);
  D.1355_3 = (<unnamed-unsigned:5>) D.1354_2;
  BIT_FIELD_REF <D.1356, 15, 0> = 1091;
  D.1356.d = D.1355_3;


  parent reply	other threads:[~2012-11-13  1:19 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-10 16:59 [Bug rtl-optimization/46888] New: " ams at gcc dot gnu.org
2010-12-10 17:02 ` [Bug rtl-optimization/46888] " ams at gcc dot gnu.org
2010-12-10 19:42 ` pinskia at gcc dot gnu.org
2010-12-13 21:37 ` pinskia at gcc dot gnu.org
2012-10-12  8:08 ` pinskia at gcc dot gnu.org
2012-10-12  8:23 ` pinskia at gcc dot gnu.org
2012-10-12  8:49 ` pinskia at gcc dot gnu.org
2012-10-12  8:51 ` pinskia at gcc dot gnu.org
2012-11-13  1:19 ` pinskia at gcc dot gnu.org [this message]
2022-12-01  0:02 ` pinskia at gcc dot gnu.org

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