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* [Bug fortran/54852] New: Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto
@ 2012-10-07 21:46 dominiq at lps dot ens.fr
2013-06-29 14:50 ` [Bug fortran/54852] " dominiq at lps dot ens.fr
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: dominiq at lps dot ens.fr @ 2012-10-07 21:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54852
Bug #: 54852
Summary: Bogus(?) warnings when compiling
gfortran.dg/bind_c_vars.f90
gfortran.dg/bind_c_vars_driver.c with -flto
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: dominiq@lps.ens.fr
When compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c
with -flto, one gets the following warnings which seem bogus:
[macbook] f90/bug% /opt/gcc/gcc4.8a/bin/gfortran -flto
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars.f90
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars_driver.c
In file included from
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars.f90:16:0,
from :0:
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars_driver.c:12:5: warning:
type of 'myF90Array2D' does not match original declaration [enabled by default]
int myF90Array2D[2][3]; /* B in bind_c_vars */
^
In file included from :0:0:
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars.f90:16:0: note: previously
declared here
integer(c_int), bind(c, name="myF90Array2D") :: B(3, 2)
^
In file included from
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars.f90:16:0,
from :0:
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars_driver.c:11:5: warning:
type of 'myF90Array3D' does not match original declaration [enabled by default]
int myF90Array3D[10][5][18]; /* A in bind_c_vars */
^
In file included from :0:0:
/opt/gcc/work/gcc/testsuite/gfortran.dg/bind_c_vars.f90:15:0: note: previously
declared here
integer(c_int), bind(c, name="myF90Array3D") :: A(18, 3:7, 10)
^
The executable runs fine.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/54852] Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto
2012-10-07 21:46 [Bug fortran/54852] New: Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto dominiq at lps dot ens.fr
@ 2013-06-29 14:50 ` dominiq at lps dot ens.fr
2014-02-04 11:39 ` dominiq at lps dot ens.fr
2014-02-04 11:41 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: dominiq at lps dot ens.fr @ 2013-06-29 14:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54852
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2013-06-29
CC| |jh at suse dot cz
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Still present at revision 200557.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/54852] Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto
2012-10-07 21:46 [Bug fortran/54852] New: Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto dominiq at lps dot ens.fr
2013-06-29 14:50 ` [Bug fortran/54852] " dominiq at lps dot ens.fr
@ 2014-02-04 11:39 ` dominiq at lps dot ens.fr
2014-02-04 11:41 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: dominiq at lps dot ens.fr @ 2014-02-04 11:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54852
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 60057 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/54852] Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto
2012-10-07 21:46 [Bug fortran/54852] New: Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto dominiq at lps dot ens.fr
2013-06-29 14:50 ` [Bug fortran/54852] " dominiq at lps dot ens.fr
2014-02-04 11:39 ` dominiq at lps dot ens.fr
@ 2014-02-04 11:41 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-02-04 11:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54852
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, lto
Status|WAITING |NEW
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
LTO warns that
/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/bind_c_vars_driver.c:12:5:
warning: type of 'myF90Array2D' does not match original declaration [enabled by
default]
/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/bind_c_vars.f90:16:0:
note: previously declared here
/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/bind_c_vars_driver.c:11:5:
warning: type of 'myF90Array3D' does not match original declaration [enabled by
default]
/space/rguenther/src/svn/trunk/gcc/testsuite/gfortran.dg/bind_c_vars.f90:15:0:
note: previously declared here
which effectively means that assignments in GIMPLE between those arrays
would be invalid (not array members but whole arrays). Not sure if we
can create a testcase that will eventually ICE though. Usually the above
also means that the arrays use different alias sets but that's safe here
because the alias set of an array is that of its element (and those are
compatible here).
The issue is that in C a[2][3] is ARRAY_TYPE <ARRAY_TYPE <...> > but
GFortran represents a(2)(3) as 1D ARRAY_TYPE <...> and thus both types
are not structurally equivalent (which is why LTO warns).
Not sure if this case is motivation enough to treat arrays structurally
the same if their overall size is the same.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-02-04 11:41 UTC | newest]
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2012-10-07 21:46 [Bug fortran/54852] New: Bogus(?) warnings when compiling gfortran.dg/bind_c_vars.f90 gfortran.dg/bind_c_vars_driver.c with -flto dominiq at lps dot ens.fr
2013-06-29 14:50 ` [Bug fortran/54852] " dominiq at lps dot ens.fr
2014-02-04 11:39 ` dominiq at lps dot ens.fr
2014-02-04 11:41 ` rguenth at gcc dot gnu.org
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