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* [Bug fortran/43837] New: Set TREE_NOTHROW also on libgfortran library calls
@ 2010-04-21 17:47 burnus at gcc dot gnu dot org
2010-06-11 13:48 ` [Bug fortran/43837] " fxcoudert at gcc dot gnu dot org
0 siblings, 1 reply; 3+ messages in thread
From: burnus at gcc dot gnu dot org @ 2010-04-21 17:47 UTC (permalink / raw)
To: gcc-bugs
Follow up to PR 43836 and http://gcc.gnu.org/ml/fortran/2010-04/msg00222.html
> It would be good to set TREE_NOTHROW also on libgfortran library calls
> that are known not to throw exceptions (I guess most of them, except
> those that do IO).
POSIX lists which libc functions have to and can throw, cf.
http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_09.html#tag_02_09_05
In the glibc headers one can also look for functions which use __THROW on
prototypes (__THROW means the function never throws) and which don't; also the
__NTH macro and __REDIRECT_NTH.
In libgfortran itself, one can use __attribute__ ((nothrow)), cf.
http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
In the front end (call to library routines) TREE_NOTHROW.
--
Summary: Set TREE_NOTHROW also on libgfortran library calls
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43837
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug fortran/43837] Set TREE_NOTHROW also on libgfortran library calls
2010-04-21 17:47 [Bug fortran/43837] New: Set TREE_NOTHROW also on libgfortran library calls burnus at gcc dot gnu dot org
@ 2010-06-11 13:48 ` fxcoudert at gcc dot gnu dot org
0 siblings, 0 replies; 3+ messages in thread
From: fxcoudert at gcc dot gnu dot org @ 2010-06-11 13:48 UTC (permalink / raw)
To: gcc-bugs
--
fxcoudert 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 |2010-06-11 13:47:28
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43837
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug fortran/43837] Set TREE_NOTHROW also on libgfortran library calls
[not found] <bug-43837-4@http.gcc.gnu.org/bugzilla/>
@ 2021-12-18 1:19 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-18 1:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43837
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Severity|normal |enhancement
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-04-21 17:47 [Bug fortran/43837] New: Set TREE_NOTHROW also on libgfortran library calls burnus at gcc dot gnu dot org
2010-06-11 13:48 ` [Bug fortran/43837] " fxcoudert at gcc dot gnu dot org
[not found] <bug-43837-4@http.gcc.gnu.org/bugzilla/>
2021-12-18 1:19 ` pinskia at gcc dot gnu.org
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