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References: <bug-36013-9404@http.gcc.gnu.org/bugzilla/>
Subject: [Bug middle-end/36013] [4.1/4.3 Regression] Wrong code involving restricted pointers to non-restricted pointers
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------- Comment #1 from rguenth at gcc dot gnu dot org  2008-04-22 22:17 -------
Confirmed.  The tree level gets this right and we expand from

  # VUSE <SMT.4_7(D)>
  D.1761 = *p;
  # SMT.5_9 = VDEF <SMT.5_8(D)>
  *D.1761 = 1;
  # SMT.5_10 = VDEF <SMT.5_9>
  **q = 2;
  if (*D.1761 != 2)

and cse1 removes the comparison.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
      Known to fail|                            |4.1.3 4.3.0
      Known to work|                            |4.0.4 4.2.3
   Last reconfirmed|0000-00-00 00:00:00         |2008-04-22 22:17:50
               date|                            |
            Summary|Wrong code involving        |[4.1/4.3 Regression] Wrong
                   |restricted pointers to non- |code involving restricted
                   |restricted pointers         |pointers to non-restricted
                   |                            |pointers
   Target Milestone|---                         |4.1.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36013