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From: "dominiq at lps dot ens dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/32393] gfortran - incorrect run time results
Date: Wed, 20 Jun 2007 15:43:00 -0000 [thread overview]
Message-ID: <20070620154323.26716.qmail@sourceware.org> (raw)
In-Reply-To: <bug-32393-10129@http.gcc.gnu.org/bugzilla/>
------- Comment #12 from dominiq at lps dot ens dot fr 2007-06-20 15:43 -------
With the following changes to the original code:
[karma] f90/bug% diff -u pr32393.f pr32393_mod.f
--- pr32393.f Mon Jun 18 16:46:48 2007
+++ pr32393_mod.f Wed Jun 20 17:40:03 2007
@@ -16,7 +16,7 @@
c+---------------------------------------------------------------------+
character its1*4
character title*72
- integer t
+! integer t
real cc, ctrans, dprod2, sdb, sdm,
$ stdb, stdm, sum, ttt, uf,
$ vf, wsf
@@ -99,6 +99,7 @@
c| skip second variation if cc matrix = 0 |
c+---------------------------------------------------------------------+
call scprod (ns*ns,1,1,cc,cc,sum)
+ sum = 0
if (sum.le.0.)go to 180
c+---------------------------------------------------------------------+
c| choose appropriate computational routine |
@@ -182,8 +183,10 @@
not=6
nvg=3
iprec = 1
- call vr2 ( intp, ivg, ccrans, cc, ns, stdb, stdm, t,
- $ k2, nlin, istab )
+! call vr2 ( intp, ivg, ccrans, cc, ns, stdb, stdm, t,
+! $ k2, nlin, istab )
+ call vr2 ( 0, ivg, ccrans, cc, ns, stdb, stdm, t,
+ $ 0, 0, 0 )
stop
end
subroutine clect2
I get with gfortran:
[karma] f90/bug% gfc -g -O3 pr32393_mod.f
[karma] f90/bug% a.out
1
lower triangular matrix with 3 rows
row 1 0.8000E+01
row 2 0.9000E+01 0.1000E+02
row 3 0.1100E+02 0.1200E+02 0.1300E+02
iprec = 1
1
lower triangular matrix with 3 rows
row 1 0.1600E+02
row 2 0.9000E+01 0.2000E+02
row 3 0.1100E+02 0.1200E+02 0.2600E+02
[karma] f90/bug% gfc -g -O1 pr32393_mod.f
[karma] f90/bug% a.out
1
lower triangular matrix with 3 rows
row 1 0.8000E+01
row 2 0.9000E+01 0.1000E+02
row 3 0.1100E+02 0.1200E+02 0.1300E+02
iprec = 1
1
lower triangular matrix with 3 rows
row 1 0.1600E+02
row 2 0.9000E+01 0.2000E+02
row 3 0.1100E+02 0.1200E+02 0.2600E+02
[karma] f90/bug% gfc -g -O1 -ffast-math -funroll-loops pr32393_mod.f
[karma] f90/bug% a.out
1
lower triangular matrix with 3 rows
row 1 0.8000E+01
row 2 0.9000E+01 0.1000E+02
row 3 0.1100E+02 0.1200E+02 0.1300E+02
iprec = 1
1
lower triangular matrix with 3 rows
row 1 0.1600E+02
row 2 0.9000E+01 0.2000E+02
row 3 0.1100E+02 0.1200E+02 0.2600E+02
[karma] f90/bug% gfc -g pr32393_mod.f
[karma] f90/bug% a.out
1
lower triangular matrix with 3 rows
row 1 0.8000E+01
row 2 0.9000E+01 0.1000E+02
row 3 0.1100E+02 0.1200E+02 0.1300E+02
iprec = 1
1
lower triangular matrix with 3 rows
row 1 0.1600E+02
row 2 0.9000E+01 0.2000E+02
row 3 0.1100E+02 0.1200E+02 0.2600E+02
Note that I have only given some values to variables used in tests (plus set t
to real).
BTW I do not see (beside obfuscation) the interest of the constructs:
jt=t(j2)
tt=.5*tt
t(j2)=jt
where jt and tt are equivalenced!
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32393
next prev parent reply other threads:[~2007-06-20 15:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-18 14:42 [Bug fortran/32393] New: " dir at lanl dot gov
2007-06-18 14:49 ` [Bug fortran/32393] " dir at lanl dot gov
2007-06-18 14:52 ` dominiq at lps dot ens dot fr
2007-06-18 15:05 ` dir at lanl dot gov
2007-06-18 15:29 ` dominiq at lps dot ens dot fr
2007-06-18 16:16 ` burnus at gcc dot gnu dot org
2007-06-18 18:13 ` dir at lanl dot gov
2007-06-18 18:44 ` dominiq at lps dot ens dot fr
2007-06-18 18:46 ` dominiq at lps dot ens dot fr
2007-06-18 21:04 ` burnus at gcc dot gnu dot org
2007-06-19 12:48 ` dominiq at lps dot ens dot fr
2007-06-20 14:15 ` dir at lanl dot gov
2007-06-20 15:43 ` dominiq at lps dot ens dot fr [this message]
2007-06-20 16:21 ` burnus at gcc dot gnu dot org
2007-06-21 12:58 ` dir at lanl dot gov
2007-06-21 13:23 ` dir at lanl dot gov
2007-06-21 16:16 ` dir at lanl dot gov
2007-06-21 16:29 ` dir at lanl dot gov
2007-06-21 16:48 ` burnus at gcc dot gnu dot org
2007-06-21 17:04 ` dominiq at lps dot ens dot fr
2007-06-21 17:14 ` burnus at gcc dot gnu dot org
2007-06-21 20:06 ` dir at lanl dot gov
2007-06-21 20:11 ` dir at lanl dot gov
2007-06-22 9:41 ` burnus at gcc dot gnu dot org
2007-06-22 13:27 ` burnus at gcc dot gnu dot org
2007-06-22 14:28 ` dir at lanl dot gov
2007-06-22 14:32 ` burnus at gcc dot gnu dot org
2007-06-24 10:51 ` dominiq at lps dot ens dot fr
2007-06-24 11:12 ` Andrew Pinski
2007-06-24 11:13 ` pinskia at gmail dot com
2007-06-24 19:28 ` dominiq at lps dot ens dot fr
2007-06-24 19:37 ` Andrew Pinski
2007-06-24 19:37 ` pinskia at gmail dot com
2007-06-24 19:45 ` burnus at gcc dot gnu dot org
2007-06-24 19:52 ` dominiq at lps dot ens dot fr
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