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* [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan
@ 2011-09-08 16:27 arnaud02 at users dot sourceforge.net
2011-09-08 16:41 ` [Bug fortran/50334] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: arnaud02 at users dot sourceforge.net @ 2011-09-08 16:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334
Bug #: 50334
Summary: interaction between -Wuninitialized and
-finit-real=snan
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: arnaud02@users.sourceforge.net
Considering
subroutine qq(aa)
aa = bb + 1 ! bb unset
end subroutine
>gfortran461 -O3 -Wuninitialized -c qq.f
qq.f: In function 'qq':
qq.f:2:0: warning: 'bb' is used uninitialized in this function
[-Wuninitialized]
>gfortran461 -O3 -Wuninitialized -finit-real=snan -c qq.f
>
The absence of compile-time warnings in the second case surprised me for a
while until I tracked it down to "-finit-real=snan". "-finit-real=snan" is a
killer feature of gfortran, badly missing in Intel Fortran for instance. It is
somewhat regrettable that this option disables the compile-time warnings about
uninitialized variables as "snan" in this case is used to find unset variables
at run-time.
Could you at least add a note in the description of "-finit-real=" explaining
that "-finit-real=" will disable the warnings about uninitialized variables
even for "snan"?
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug fortran/50334] interaction between -Wuninitialized and -finit-real=snan 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net @ 2011-09-08 16:41 ` pinskia at gcc dot gnu.org 2011-09-08 17:06 ` kargl at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu.org @ 2011-09-08 16:41 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-09-08 16:40:19 UTC --- Well this is kinda of expected, since you are saying all float variables are going to be initialized with SNAN so you can detect at runtime those variables which were left uninitialized. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug fortran/50334] interaction between -Wuninitialized and -finit-real=snan 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net 2011-09-08 16:41 ` [Bug fortran/50334] " pinskia at gcc dot gnu.org @ 2011-09-08 17:06 ` kargl at gcc dot gnu.org 2011-11-08 8:05 ` [Bug fortran/50334] interaction between -Wuninitialized and -finit-* fxcoudert at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: kargl at gcc dot gnu.org @ 2011-09-08 17:06 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334 kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P5 CC| |kargl at gcc dot gnu.org Severity|normal |enhancement --- Comment #2 from kargl at gcc dot gnu.org 2011-09-08 17:05:37 UTC --- Changed to enhancement request. Although, I think that this should be closed as a 'Doctor, it hurts when I do this.' issue. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug fortran/50334] interaction between -Wuninitialized and -finit-* 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net 2011-09-08 16:41 ` [Bug fortran/50334] " pinskia at gcc dot gnu.org 2011-09-08 17:06 ` kargl at gcc dot gnu.org @ 2011-11-08 8:05 ` fxcoudert at gcc dot gnu.org 2011-11-08 8:13 ` fxcoudert at gcc dot gnu.org 2011-11-08 8:50 ` fxcoudert at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: fxcoudert at gcc dot gnu.org @ 2011-11-08 8:05 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334 Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW URL| |http://gcc.gnu.org/ml/gcc-p | |atches/2011-11/msg01136.htm | |l Keywords| |documentation, patch Last reconfirmed| |2011-11-08 CC| |fxcoudert at gcc dot | |gnu.org AssignedTo|unassigned at gcc dot |fxcoudert at gcc dot |gnu.org |gnu.org Ever Confirmed|0 |1 Summary|interaction between |interaction between |-Wuninitialized and |-Wuninitialized and |-finit-real=snan |-finit-* --- Comment #3 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> 2011-11-08 07:56:41 UTC --- Document patch submitted at http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01136.html ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug fortran/50334] interaction between -Wuninitialized and -finit-* 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net ` (2 preceding siblings ...) 2011-11-08 8:05 ` [Bug fortran/50334] interaction between -Wuninitialized and -finit-* fxcoudert at gcc dot gnu.org @ 2011-11-08 8:13 ` fxcoudert at gcc dot gnu.org 2011-11-08 8:50 ` fxcoudert at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: fxcoudert at gcc dot gnu.org @ 2011-11-08 8:13 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334 --- Comment #4 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> 2011-11-08 08:11:16 UTC --- Author: fxcoudert Date: Tue Nov 8 08:11:10 2011 New Revision: 181150 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181150 Log: PR fortran/50334 * invoke.texi (-finit-*): Document interaction with -Wuninitialized. Modified: trunk/gcc/fortran/ChangeLog trunk/gcc/fortran/invoke.texi ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug fortran/50334] interaction between -Wuninitialized and -finit-* 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net ` (3 preceding siblings ...) 2011-11-08 8:13 ` fxcoudert at gcc dot gnu.org @ 2011-11-08 8:50 ` fxcoudert at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: fxcoudert at gcc dot gnu.org @ 2011-11-08 8:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50334 Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Target Milestone|--- |4.7.0 --- Comment #5 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> 2011-11-08 08:11:57 UTC --- Fixed on trunk. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-11-08 8:13 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-09-08 16:27 [Bug fortran/50334] New: interaction between -Wuninitialized and -finit-real=snan arnaud02 at users dot sourceforge.net 2011-09-08 16:41 ` [Bug fortran/50334] " pinskia at gcc dot gnu.org 2011-09-08 17:06 ` kargl at gcc dot gnu.org 2011-11-08 8:05 ` [Bug fortran/50334] interaction between -Wuninitialized and -finit-* fxcoudert at gcc dot gnu.org 2011-11-08 8:13 ` fxcoudert at gcc dot gnu.org 2011-11-08 8:50 ` fxcoudert at gcc dot gnu.org
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