public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug fortran/50221] New: Allocatable string length fails with array assignment @ 2011-08-28 21:40 clivegpage at gmail dot com 2011-08-29 7:57 ` [Bug fortran/50221] " burnus at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: clivegpage at gmail dot com @ 2011-08-28 21:40 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50221 Bug #: 50221 Summary: Allocatable string length fails with array assignment Classification: Unclassified Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned@gcc.gnu.org ReportedBy: clivegpage@gmail.com The program below: program testalloc implicit none character(:), allocatable, dimension(:) :: array array = (/'xx', 'yy', 'zz'/) print *, 'array=', array, len(array(1)), size(array) end program Should print out something like: array=xxyyzz 2 3 but with gfortran (v4.6.0) I get array=zzzzzz 2 3 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/50221] Allocatable string length fails with array assignment 2011-08-28 21:40 [Bug fortran/50221] New: Allocatable string length fails with array assignment clivegpage at gmail dot com @ 2011-08-29 7:57 ` burnus at gcc dot gnu.org 2012-05-12 12:31 ` burnus at gcc dot gnu.org 2013-06-16 14:31 ` dominiq at lps dot ens.fr 2 siblings, 0 replies; 4+ messages in thread From: burnus at gcc dot gnu.org @ 2011-08-29 7:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50221 Tobias Burnus <burnus at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |burnus at gcc dot gnu.org --- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-08-29 07:32:18 UTC --- Unfortunately, there are still some issues with deferred-length character strings - including arrays; see also bug 45170 comment 9. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/50221] Allocatable string length fails with array assignment 2011-08-28 21:40 [Bug fortran/50221] New: Allocatable string length fails with array assignment clivegpage at gmail dot com 2011-08-29 7:57 ` [Bug fortran/50221] " burnus at gcc dot gnu.org @ 2012-05-12 12:31 ` burnus at gcc dot gnu.org 2013-06-16 14:31 ` dominiq at lps dot ens.fr 2 siblings, 0 replies; 4+ messages in thread From: burnus at gcc dot gnu.org @ 2012-05-12 12:31 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50221 --- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-05-12 12:10:33 UTC --- The following program illustrates some of the problems: a) If the comment lines are removed (i.e. a module is used), there is no valgrind failure and the result is correct. (Note: It requires the patch from PR 53329 with "ns" replaced by "sym->ns".) b) The program (as is) shows no valgrind failure, but the assignment is wrong: "c3", "c3", "c3" instead of "a1", "b2", "c3". c) If one removes the "save,", the result is as with (b) but valgrind shows many errors of the form: Conditional jump or move depends on uninitialised value(s) at 0x4C2C3A9: memcpy@@GLIBC_2.14 (The same failures one gets for the original program of comment 0.) Looking at the dump for (b) - also in comparison with (a) -, I fail to see why one get's ["c1","c1","c1"] - the code looks correct ("S.0" goes from 1 to 3): __builtin_memcpy ((void *) &(*D.1881)[(S.0 + D.1885) + D.1882], (void *) &const[S.0 + -1], (unsigned long) D.1887); In principle, accessing the second argument wrongly should cause that problem. But that one looks okay. I wonder more about the left as (*D.1881)[...] assumes that the compiler knows the size of one element - I am not sure that that works as ".str" is not yet the right value before the line: character(kind=1)[0:][1:.str] * restrict D.1881; !module m character(len=:), save, allocatable :: str(:) character(len=2), parameter :: const(3) = ["a1", "b2", "c3"] !end !use m call test() if(allocated(str)) deallocate(str) contains subroutine test() call doit() print *, 'strlen=',len(str),' / array size =',size(str) print '(3a)', '>',str(1),'<' print '(3a)', '>',str(2),'<' print '(3a)', '>',str(3),'<' end subroutine test subroutine doit() str = const end subroutine doit end ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/50221] Allocatable string length fails with array assignment 2011-08-28 21:40 [Bug fortran/50221] New: Allocatable string length fails with array assignment clivegpage at gmail dot com 2011-08-29 7:57 ` [Bug fortran/50221] " burnus at gcc dot gnu.org 2012-05-12 12:31 ` burnus at gcc dot gnu.org @ 2013-06-16 14:31 ` dominiq at lps dot ens.fr 2 siblings, 0 replies; 4+ messages in thread From: dominiq at lps dot ens.fr @ 2013-06-16 14:31 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50221 Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Status|UNCONFIRMED |NEW Last reconfirmed| |2013-06-16 Ever confirmed|0 |1 --- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Still present at revision 200128. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-06-16 14:31 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-08-28 21:40 [Bug fortran/50221] New: Allocatable string length fails with array assignment clivegpage at gmail dot com 2011-08-29 7:57 ` [Bug fortran/50221] " burnus at gcc dot gnu.org 2012-05-12 12:31 ` burnus at gcc dot gnu.org 2013-06-16 14:31 ` dominiq at lps dot ens.fr
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).