[Bug fortran/31833] New: FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[Bug fortran/31833] New: FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[danglin at gcc dot gnu dot org]

Executing on host: /test/gnu/gcc/objdir/gcc/testsuite/gfortran/../../gfortran
-B
/test/gnu/gcc/objdir/gcc/testsuite/gfortran/../../
/test/gnu/gcc/gcc/gcc/testsui
te/gfortran.dg/integer_exponentiation_3.F90   -O0   
-L/test/gnu/gcc/objdir/hppa
64-hp-hpux11.11/./libgfortran/.libs
-L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/.
/libgfortran/.libs -L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libiberty  -lm
 -o ./integer_exponentiation_3.exe    (timeout = 300)
/test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/integer_exponentiation_3.F90:167.54:

  r4 = nearest(1.0,-1.0); call check((r4)**(huge(0)),(nearest(1.0,-1.0))**(huge
                                                     1
Warning: Arithmetic underflow at (1)
/test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/integer_exponentiation_3.F90:169.58:

  r8 = nearest(1.0_8,-1.0); call check((r8)**(huge(0_8)),(nearest(1.0_8,-1.0))*
                                                         1
Warning: Arithmetic underflow at (1)
output is:
/test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/integer_exponentiation_3.F90:167.54:

  r4 = nearest(1.0,-1.0); call check((r4)**(huge(0)),(nearest(1.0,-1.0))**(huge
                                                     1
Warning: Arithmetic underflow at (1)
/test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/integer_exponentiation_3.F90:169.58:

  r8 = nearest(1.0_8,-1.0); call check((r8)**(huge(0_8)),(nearest(1.0_8,-1.0))*
                                                         1
Warning: Arithmetic underflow at (1)

PASS: gfortran.dg/integer_exponentiation_3.F90  -O0   (test for warnings, line
1
67)
PASS: gfortran.dg/integer_exponentiation_3.F90  -O0   (test for warnings, line
1
69)
PASS: gfortran.dg/integer_exponentiation_3.F90  -O0  (test for excess errors)
Setting LD_LIBRARY_PATH to
.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfort
ran/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/test/gnu
/gcc/objdir/gcc:.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/
test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/test/gnu/gcc/objdir
/gcc
FAIL: gfortran.dg/integer_exponentiation_3.F90  -O0  execution test

I think this test has been failing since it was introduced.


-- 
           Summary: FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0
                    and above
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: danglin at gcc dot gnu dot org
 GCC build triplet: hppa64-hp-hpux11.11
  GCC host triplet: hppa64-hp-hpux11.11
GCC target triplet: hppa64-hp-hpux11.11


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31833

[Bug fortran/31833] FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[fxcoudert at gcc dot gnu dot org]

------- Comment #1 from fxcoudert at gcc dot gnu dot org  2007-05-16 15:46 -------
All I have access to is hppa2.0w-hp-hpux11.23, do you think it would be
triggered there also?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31833

[Bug fortran/31833] FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #2 from dave at hiauly1 dot hia dot nrc dot ca  2007-05-17 01:30 -------
Subject: Re:  FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

> All I have access to is hppa2.0w-hp-hpux11.23, do you think it would be
> triggered there also?

Probably, since HP has pretty much frozen library support on hppa.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31833

[Bug fortran/31833] FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[sje at cup dot hp dot com]

------- Comment #3 from sje at cup dot hp dot com  2007-06-06 22:04 -------
Here is a cutdown test case, it looks like we have a roundoff difference
between the exponentiation done at compile time and the exponentiation done at
run time and thus a and b are not 'exactly the same'.  Maybe we should use the
approximate check instead of the exact check in this case.

subroutine check_c4 (a, b)
    complex(kind=4), intent(in) :: a, b
    print *, a
    print *, b
    if (a /= b) call abort()
end subroutine check_c4

program test
  complex(kind=4) :: c4
  c4 = (1.0,0.2)
  call check_c4(c4**9,(1.0,0.2)**9)

end program test


-- 

sje at cup dot hp dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sje at cup dot hp dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31833

[Bug fortran/31833] FAIL: gfortran.dg/integer_exponentiation_3.F90 at -O0 and above

[sje at cup dot hp dot com]

------- Comment #4 from sje at cup dot hp dot com  2007-06-07 15:38 -------
This is fixed with a testsuite change in version 125510.  I forgot to put
the PR number in the ChangeLog file.  I changed the test to do an approximate
comparision instead of an exact one.


-- 

sje at cup dot hp dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31833