From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-407168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 32340 invoked by alias); 19 Nov 2012 21:51:33 -0000
Received: (qmail 31518 invoked by uid 48); 19 Nov 2012 21:51:05 -0000
From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/55401] New: uninstrumented path in TM clones are still instrumented
Date: Mon, 19 Nov 2012 21:51:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Keywords:
X-Bugzilla-Severity: minor
X-Bugzilla-Who: aldyh at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-55401-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-11/txt/msg01830.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55401

             Bug #: 55401
           Summary: uninstrumented path in TM clones are still
                    instrumented
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: aldyh@gcc.gnu.org


If a transaction appears in a TM clone, the uninstrumented path still gets
instrumented.  Example:

int george;
int ringo;

__attribute__((transaction_callable))
void q1()
{
  ringo=666;
  __transaction_atomic {
      george=999;
  }
}


Generated code:

  <bb 2>:
  _8 = 666;
  __builtin__ITM_WU4 (&ringo, _8);
  tm_state.5_11 = __builtin__ITM_beginTransaction (43);
  _12 = tm_state.5_11 & 2;
  if (_12 != 0)
    goto <bb 3>;
  else
    goto <bb 4>;

  <bb 3>:
  _13 = 999;
  __builtin__ITM_WU4 (&george, _13);
  __builtin__ITM_commitTransaction ();
  goto <bb 5>;

  <bb 4>:
  _15 = 999;
  __builtin__ITM_WU4 (&george, _15);
  __builtin__ITM_commitTransaction ();

  <bb 5>:
  return;