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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/56157] [4.8 Regression] ICE with -ftree-vectorize in in compute_live_loop_exits
Date: Thu, 31 Jan 2013 11:54:00 -0000	[thread overview]
Message-ID: <bug-56157-4-5OuJzoreBB@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-56157-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56157

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-31 11:54:09 UTC ---
Reduced testcase:

struct Pixel {
    unsigned short r;
    unsigned short g;
    unsigned short b;
    unsigned short a;
};

void fn(unsigned char *dst, const unsigned char *src, unsigned width)
{
  unsigned x;
  for(x = 0; x < width; x += 1)
    {
      struct Pixel pixel;
      pixel.r = (unsigned short)(((unsigned)src[0]) * 0xffff / 0xff);
      pixel.g = (unsigned short)(((unsigned)src[1]) * 0xffff / 0xff);
      pixel.b = (unsigned short)(((unsigned)src[2]) * 0xffff / 0xff);
      pixel.a = (unsigned short)(((unsigned)src[3]) * 0xffff / 0xff);
      __builtin_memcpy(dst, &pixel, sizeof pixel);
      src += 4;
      dst += 8;
    }
}


  parent reply	other threads:[~2013-01-31 11:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-30 21:43 [Bug tree-optimization/56157] New: ICE with -ftree-vectorize in in compute_live_loop_exits (4.8 trunk) jana at saout dot de
2013-01-31  8:46 ` [Bug tree-optimization/56157] [4.8 Regression] ICE with -ftree-vectorize in in compute_live_loop_exits jakub at gcc dot gnu.org
2013-01-31  9:05 ` jakub at gcc dot gnu.org
2013-01-31  9:15 ` jakub at gcc dot gnu.org
2013-01-31 11:10 ` jakub at gcc dot gnu.org
2013-01-31 11:45 ` rguenth at gcc dot gnu.org
2013-01-31 11:54 ` rguenth at gcc dot gnu.org [this message]
2013-01-31 11:59 ` rguenth at gcc dot gnu.org
2013-01-31 14:46 ` rguenth at gcc dot gnu.org
2013-01-31 14:54 ` rguenth at gcc dot gnu.org
2013-01-31 16:53 ` rguenth at gcc dot gnu.org
2013-01-31 16:54 ` rguenth at gcc dot gnu.org

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