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* [Bug fortran/36931] New: unneeded temporary
@ 2008-07-25 10:34 jv244 at cam dot ac dot uk
2008-07-25 13:05 ` [Bug fortran/36931] " tkoenig at gcc dot gnu dot org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: jv244 at cam dot ac dot uk @ 2008-07-25 10:34 UTC (permalink / raw)
To: gcc-bugs
-Warray-temporaries indicates a temporary here:
MODULE M1
CONTAINS
SUBROUTINE S1()
REAL :: a(3),b(3,3),c(3)
a=MATMUL(b,c)/2
END SUBROUTINE S1
END MODULE M1
but it could be avoided as in:
MODULE M1
CONTAINS
SUBROUTINE S1()
REAL :: a(3),b(3,3),c(3)
a=MATMUL(b,c)
a=a/2
END SUBROUTINE S1
END MODULE M1
--
Summary: unneeded temporary
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jv244 at cam dot ac dot uk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
@ 2008-07-25 13:05 ` tkoenig at gcc dot gnu dot org
2008-07-28 9:52 ` [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar tkoenig at gcc dot gnu dot org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2008-07-25 13:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from tkoenig at gcc dot gnu dot org 2008-07-25 13:04 -------
Confirmed.
I knew I was opening a can of worms with that option :-)
--
tkoenig at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-07-25 13:04:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
2008-07-25 13:05 ` [Bug fortran/36931] " tkoenig at gcc dot gnu dot org
@ 2008-07-28 9:52 ` tkoenig at gcc dot gnu dot org
2008-08-17 0:06 ` pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2008-07-28 9:52 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from tkoenig at gcc dot gnu dot org 2008-07-28 09:52 -------
Another test case:
$ cat foo.f90
program main
real, dimension(2,2) :: a
real, dimension(2) :: b
call random_number(a)
b = sum(a,dim=1) + 0.4
end program main
$ gfortran -Warray-temporaries foo.f90
foo.f90:5.6:
b = sum(a,dim=1) + 0.4
1
Warning: Creating array temporary at (1)
--
tkoenig at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|unneeded temporary |unneeded temporary for array
| |intrinsic binop scalar
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
2008-07-25 13:05 ` [Bug fortran/36931] " tkoenig at gcc dot gnu dot org
2008-07-28 9:52 ` [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar tkoenig at gcc dot gnu dot org
@ 2008-08-17 0:06 ` pinskia at gcc dot gnu dot org
2010-05-09 20:32 ` dfranke at gcc dot gnu dot org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-08-17 0:06 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
` (2 preceding siblings ...)
2008-08-17 0:06 ` pinskia at gcc dot gnu dot org
@ 2010-05-09 20:32 ` dfranke at gcc dot gnu dot org
2010-09-02 19:33 ` tkoenig at gcc dot gnu dot org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: dfranke at gcc dot gnu dot org @ 2010-05-09 20:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from dfranke at gcc dot gnu dot org 2010-05-09 20:32 -------
Both testcases, the original report as well as comment #2 still produce
temporaries with gcc version 4.6.0 20100509 (experimental) (GCC).
--
dfranke at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2008-07-25 13:04:23 |2010-05-09 20:32:32
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
` (3 preceding siblings ...)
2010-05-09 20:32 ` dfranke at gcc dot gnu dot org
@ 2010-09-02 19:33 ` tkoenig at gcc dot gnu dot org
2010-09-06 21:40 ` tkoenig at gcc dot gnu dot org
2010-09-07 22:52 ` tkoenig at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2010-09-02 19:33 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from tkoenig at gcc dot gnu dot org 2010-09-02 19:33 -------
Working on it.
--
tkoenig at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |tkoenig at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2010-05-09 20:32:32 |2010-09-02 19:33:43
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
` (4 preceding siblings ...)
2010-09-02 19:33 ` tkoenig at gcc dot gnu dot org
@ 2010-09-06 21:40 ` tkoenig at gcc dot gnu dot org
2010-09-07 22:52 ` tkoenig at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2010-09-06 21:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from tkoenig at gcc dot gnu dot org 2010-09-06 21:40 -------
Subject: Bug 36931
Author: tkoenig
Date: Mon Sep 6 21:40:15 2010
New Revision: 163934
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=163934
Log:
2010-09-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36931
* frontend-passes.c (optimize_binop_array_assignment): New
function.
(optimize_assignment): Call it.
2010-09-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/36931
* gfortran.dg/dependency_35.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/dependency_35.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar
2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
` (5 preceding siblings ...)
2010-09-06 21:40 ` tkoenig at gcc dot gnu dot org
@ 2010-09-07 22:52 ` tkoenig at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2010-09-07 22:52 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from tkoenig at gcc dot gnu dot org 2010-09-07 22:52 -------
Fixed, closing.
--
tkoenig at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36931
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2010-09-07 22:52 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2008-07-25 10:34 [Bug fortran/36931] New: unneeded temporary jv244 at cam dot ac dot uk
2008-07-25 13:05 ` [Bug fortran/36931] " tkoenig at gcc dot gnu dot org
2008-07-28 9:52 ` [Bug fortran/36931] unneeded temporary for array intrinsic binop scalar tkoenig at gcc dot gnu dot org
2008-08-17 0:06 ` pinskia at gcc dot gnu dot org
2010-05-09 20:32 ` dfranke at gcc dot gnu dot org
2010-09-02 19:33 ` tkoenig at gcc dot gnu dot org
2010-09-06 21:40 ` tkoenig at gcc dot gnu dot org
2010-09-07 22:52 ` tkoenig at gcc dot gnu dot org
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