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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/58553] New fail in PASS->FAIL: gcc.c-torture/execute/memcpy-2.c execution on arm and aarch64
Date: Mon, 30 Sep 2013 11:17:00 -0000	[thread overview]
Message-ID: <bug-58553-4-YMDlPcSXgF@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-58553-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58553

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase that also fails on x86_64:

#define MAX_LENGTH 96
#define SEQUENCE_LENGTH 31

static struct {
  char buf[MAX_LENGTH + 1];
} u1, u2;

extern void abort (void);

int main ()
{
  int i;
  char c;

  u1.buf[0] = '\0';
  for (i = 0, c = 'A'; i < MAX_LENGTH; i++, c++)
    {
      u1.buf[i] = 'a';
      if (c >= 'A' + SEQUENCE_LENGTH)
        c = 'A';
      u2.buf[i] = c;
    }
  if (u1.buf[MAX_LENGTH] != '\0')
    abort ();

  return 0;
}

jump threading rotates the loop in interesting ways.


  parent reply	other threads:[~2013-09-30 11:17 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-27 16:44 [Bug tree-optimization/58553] New: " jgreenhalgh at gcc dot gnu.org
2013-09-27 16:46 ` [Bug tree-optimization/58553] " jgreenhalgh at gcc dot gnu.org
2013-09-27 19:11 ` law at redhat dot com
2013-09-27 19:15 ` pinskia at gcc dot gnu.org
2013-09-27 19:19 ` law at redhat dot com
2013-09-27 19:33 ` law at redhat dot com
2013-09-27 19:33 ` law at redhat dot com
2013-09-27 19:37 ` law at redhat dot com
2013-09-30  7:49 ` rguenth at gcc dot gnu.org
2013-09-30 11:17 ` rguenth at gcc dot gnu.org [this message]
2013-09-30 12:43 ` rguenth at gcc dot gnu.org
2013-09-30 15:52 ` law at redhat dot com
2013-10-01  7:40 ` rguenther at suse dot de
2013-10-01  7:41 ` rguenth at gcc dot gnu.org
2013-10-01  7:59 ` rguenth at gcc dot gnu.org
2013-10-01 16:33 ` law at redhat dot com
2013-10-02  8:01 ` rguenther at suse dot de

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