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From: "enok at lysator dot liu dot se" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/33686] New: FORALL loop gives wrong result Date: Mon, 08 Oct 2007 07:17:00 -0000 [thread overview] Message-ID: <bug-33686-7816@http.gcc.gnu.org/bugzilla/> (raw) A simple program that is supposed to invert a permutation P gives wrong result with gfortran 4.2.1. A quite recent trunk 4.3 gfortran also gave wrong result. See also discussion in comp.lang.fortran subject "Most elegant syntax for inverting a permutation?". The concensus seems to be that this forall construct should work according to the standard. PROGRAM TST IMPLICIT NONE INTEGER :: P(4),I P = (/2,4,1,3/) FORALL(I=1:4) P(P(I)) = I END FORALL PRINT *, P END PROGRAM TST enok@home:~/> gfortran421 -o tst tst.f90 -static && ./tst 3 1 4 3 enok@home:~/> ifort -o tst tst.f90 && ./tst tst.f90(5): (col. 3) remark: LOOP WAS VECTORIZED. 3 1 4 2 enok@home:~/> -- Summary: FORALL loop gives wrong result Product: gcc Version: 4.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: enok at lysator dot liu dot se GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33686
next reply other threads:[~2007-10-08 7:17 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-10-08 7:17 enok at lysator dot liu dot se [this message] 2007-10-08 9:13 ` [Bug fortran/33686] " pinskia at gcc dot gnu dot org 2007-10-08 9:42 ` enok at lysator dot liu dot se 2007-10-08 11:28 ` burnus at gcc dot gnu dot org 2007-10-08 12:05 ` dominiq at lps dot ens dot fr 2007-10-08 12:16 ` burnus at gcc dot gnu dot org 2007-10-08 19:03 ` pault at gcc dot gnu dot org 2007-10-08 20:03 ` pault at gcc dot gnu dot org 2007-10-10 6:50 ` pault at gcc dot gnu dot org 2007-10-10 9:35 ` dominiq at lps dot ens dot fr 2007-10-12 13:26 ` pault at gcc dot gnu dot org 2007-10-12 13:47 ` dominiq at lps dot ens dot fr 2007-10-24 10:00 ` pault at gcc dot gnu dot org 2007-10-29 14:14 ` burnus at gcc dot gnu dot org 2007-10-29 14:15 ` burnus at gcc dot gnu dot org
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