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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/48592] alloca () calls are not DCEd
Date: Mon, 21 Oct 2013 03:26:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 4.7.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: glisse at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Priority: P3
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48592

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
                 CC|                            |glisse at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
We currently produce this .optimized:

foo (int i)
{
  void * saved_stack.2;

  <bb 2>:
  saved_stack.2_3 = 0B;
  GIMPLE_NOP
  return;

}

(and RTL finishes the cleanup)

cddce1 removes alloca
fab1 removes the stack save/restore

So I'm going to mark this as fixed.