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From: "pault at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/30404] Wrong FORALL result Date: Mon, 08 Jan 2007 11:23:00 -0000 [thread overview] Message-ID: <20070108112323.20766.qmail@sourceware.org> (raw) In-Reply-To: <bug-30404-12313@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from pault at gcc dot gnu dot org 2007-01-08 11:23 ------- There appears to be a double problem here; the segfault, which I can reproduce by adding more statements in the forall block that sets a, and the incorrect rendering of the mask logic, according to where the masking is applied. The program below illustrates the problem more simply. I have cc'd Roger Sayle. Paul integer, dimension (3, 3) :: a, b, c logical, dimension (3,3) :: l1 = .FALSE. integer :: i, j a = 2 a (1,1) = 1 a (3,3) = 1 a (2,1) = 3 a (2,3) = 3 b = a c = a forall (i = 1:3, a(i, 1) == 1) ! mask true for i = 1 forall (j = 1:3, a(2, j) == 3) ! mask true for j = 1,3 b (i, j) = 99 ! set for (i = 1) && (j = 1,3) l1 (i, j) = .TRUE. end forall end forall forall (i = 1:3, a(i, 1) .lt. 1000) forall (j = 1:3, l1(i, j)) ! mask true for (i = 1) && (j = 1,3) c (i, j) = 99 ! SHOULD be set for (i = 1) && (j = 1,3) end forall end forall ! forall (i = 1:3) ! this segfaults forall (i = 1:3, a(i, 1) .lt. 1000) forall (j = 1:3, & (a(i, 1) == 1 .and. a(2, j) == 3)) ! mask true for (i = 1) && (j = 1,3) a (i, j) = 99 ! SHOULD be set for (i = 1) && (j = 1,3) end forall end forall print *, a ! a remains unchanged for gfortran print *, b ! b is changed correctly print *, c ! c(2,:) == 99 *sigh* ! Other compilers end up with a == b == c end -- pault at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sayle at gcc dot gnu dot org Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-01-08 11:23:23 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30404
next prev parent reply other threads:[~2007-01-08 11:23 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-01-08 9:48 [Bug fortran/30404] New: " dominiq at lps dot ens dot fr 2007-01-08 11:23 ` pault at gcc dot gnu dot org [this message] 2007-01-08 12:23 ` [Bug fortran/30404] " pault at gcc dot gnu dot org 2007-01-11 16:56 ` roger at eyesopen dot com 2007-01-11 17:26 ` kargl at gcc dot gnu dot org 2007-01-16 18:15 ` sayle at gcc dot gnu dot org 2007-01-29 3:27 ` sayle at gcc dot gnu dot org 2007-02-10 16:24 ` [Bug fortran/30404] [4.1 only] " fxcoudert at gcc dot gnu dot org
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