[Bug fortran/35745] Divide incorrectly extracted from WHERE block?; run time abort

[burnus at gcc dot gnu dot org]

------- Comment #1 from burnus at gcc dot gnu dot org  2008-03-28 22:05 -------
Confirm.

Valgrind shows:

Process terminating with default action of signal 8 (SIGFPE): dumping core
  Integer divide by zero at address 0x40274EADB
    at 0x4008C6: MAIN__ (ghfhgk.f90:15)

> Divide incorrectly extracted from WHERE block?
Yes and no. The compiler essentially transforms (as -fdump-tree-original shows)

      WHERE (RDA < -15.0)
        IDA = 1/NF0 + 2
      ENDWHERE

into

      TMP = 1/NF0 + 2
      WHERE (RDA < -15.0)
        IDA = TMP
      ENDWHERE

which is the reason for the integer divide by zero and shows that moving
constant expressions out of a loop is not always a good idea.


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2008-03-28 22:05:10
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35745