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* [Bug fortran/45057] New: Unneded temporary / missed bounds violation for PACK
@ 2010-07-24 17:01 tkoenig at gcc dot gnu dot org
2010-08-06 21:21 ` [Bug fortran/45057] Unneeded " steven at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2010-07-24 17:01 UTC (permalink / raw)
To: gcc-bugs
>From a c.l.f post by "prcirrus".
ig25@linux-fd1f:~/Krempel/Pack> cat haha.f90
module te
type av
real a1, a2
end type av
end module te
PROGRAM test2
use te
parameter (mxrec=10000)
type(av) dat(mxrec)
logical mask(mxrec)
nrec=6000
mask(1:nrec) = .false.
dat(1:nrec) = pack(dat(1:nrec),mask(1:nrec))
END program test2
ig25@linux-fd1f:~/Krempel/Pack> gfortran -Warray-temporaries -fbounds-check
haha.f90
haha.f90:15.18:
dat(1:nrec) = pack(dat(1:nrec),mask(1:nrec))
1
Warnung: Creating array temporary at (1)
ig25@linux-fd1f:~/Krempel/Pack> ./a.out
ig25@linux-fd1f:~/Krempel/Pack>
We create a temporary, which is filled by the pack intrinsic (so no
bounds checking is done), and then later copied. On the copy, we
miss the bounds violation.
--
Summary: Unneded temporary / missed bounds violation for PACK
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Keywords: missed-optimization, diagnostic
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45057
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug fortran/45057] Unneeded temporary / missed bounds violation for PACK
2010-07-24 17:01 [Bug fortran/45057] New: Unneded temporary / missed bounds violation for PACK tkoenig at gcc dot gnu dot org
@ 2010-08-06 21:21 ` steven at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: steven at gcc dot gnu dot org @ 2010-08-06 21:21 UTC (permalink / raw)
To: gcc-bugs
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-08-06 21:21:08
date| |
Summary|Unneded temporary / missed |Unneeded temporary / missed
|bounds violation for PACK |bounds violation for PACK
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45057
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2010-08-06 21:21 UTC | newest]
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2010-07-24 17:01 [Bug fortran/45057] New: Unneded temporary / missed bounds violation for PACK tkoenig at gcc dot gnu dot org
2010-08-06 21:21 ` [Bug fortran/45057] Unneeded " steven at gcc dot gnu dot org
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