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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/58404] New: &noninvariant_address not forwproped into ->handled_component
Date: Thu, 12 Sep 2013 10:42:00 -0000	[thread overview]
Message-ID: <bug-58404-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58404

            Bug ID: 58404
           Summary: &noninvariant_address not forwproped into
                    ->handled_component
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org

On:

struct S { int s; };
S a[1024];

void
foo ()
{
  for (int i = 0; i < 1024; i++)
    {
      S &r = a[i];
      r.s++;
    }
}

we don't forwprop
  r_4 = &a[i_9];
  r_4->s = 2;
even when a[i_9].s is valid is_gimple_val.  Seen on libgomp.c++/simd-6.C on
gomp-4_0-branch.


             reply	other threads:[~2013-09-12 10:42 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-12 10:42 jakub at gcc dot gnu.org [this message]
2013-09-12 10:43 ` [Bug tree-optimization/58404] " rguenth at gcc dot gnu.org
2013-09-12 13:20 ` rguenth at gcc dot gnu.org
2013-09-12 13:20 ` rguenth at gcc dot gnu.org

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