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* [Bug fortran/21470] New: mark subroutine arguments __restrict__
@ 2005-05-09 14:47 tkoenig at gcc dot gnu dot org
2005-05-09 14:48 ` [Bug fortran/21470] " tkoenig at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: tkoenig at gcc dot gnu dot org @ 2005-05-09 14:47 UTC (permalink / raw)
To: gcc-bugs
Fortran subroutine arguments should be marked as
__restrict__. Currently, the following code isn't
vectorized:
$ cat loopsum.f90
subroutine foo(a,b,c,n)
real, dimension(n), intent(in) :: a,b
real, dimension(n), intent(out) :: c
do i=1,n
c(i) = a(i)+b(i)
end do
end
$ gfortran -O -S -ftree-vectorize -ftree-vectorizer-verbose=5 loopsum.f90
loopsum.f90:4: note: not vectorized: can't determine dependence between: (*a_18)
[D.527_17] and (*c_25)[D.527_17]
loopsum.f90:1: note: vectorized 0 loops in function.
$ gfortran -v
Using built-in specs.
Target: ia64-unknown-linux-gnu
Configured with: ../gcc-4.1-20050508/configure --prefix=/home/zfkts --enable-
languages=c,f95
Thread model: posix
gcc version 4.1.0 20050508 (experimental)
--
Summary: mark subroutine arguments __restrict__
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21470
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug fortran/21470] mark subroutine arguments __restrict__ 2005-05-09 14:47 [Bug fortran/21470] New: mark subroutine arguments __restrict__ tkoenig at gcc dot gnu dot org @ 2005-05-09 14:48 ` tkoenig at gcc dot gnu dot org 2005-05-09 14:53 ` [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer pinskia at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: tkoenig at gcc dot gnu dot org @ 2005-05-09 14:48 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21470 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer 2005-05-09 14:47 [Bug fortran/21470] New: mark subroutine arguments __restrict__ tkoenig at gcc dot gnu dot org 2005-05-09 14:48 ` [Bug fortran/21470] " tkoenig at gcc dot gnu dot org @ 2005-05-09 14:53 ` pinskia at gcc dot gnu dot org 2005-05-09 15:54 ` pinskia at gcc dot gnu dot org 2005-08-06 19:47 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-05-09 14:53 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-09 14:53 ------- Actually -fargument-noalias-global is set to true for fortran and should be respected instead of marking them as restrict. -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Component|fortran |tree-optimization Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2005-05-09 14:53:51 date| | Summary|mark subroutine arguments |-fargument-noalias-global |__restrict__ |has no effect for the | |vectorizer http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21470 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer 2005-05-09 14:47 [Bug fortran/21470] New: mark subroutine arguments __restrict__ tkoenig at gcc dot gnu dot org 2005-05-09 14:48 ` [Bug fortran/21470] " tkoenig at gcc dot gnu dot org 2005-05-09 14:53 ` [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer pinskia at gcc dot gnu dot org @ 2005-05-09 15:54 ` pinskia at gcc dot gnu dot org 2005-08-06 19:47 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-05-09 15:54 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-09 15:54 ------- If the aliasing information is correct on the VOPS, I would assume that the vectorizer would not have problems with it. Note there is another bug about this option, see PR 17064. -- What |Removed |Added ---------------------------------------------------------------------------- CC| |pinskia at gcc dot gnu dot | |org BugsThisDependsOn| |17064 Keywords| |alias http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21470 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer 2005-05-09 14:47 [Bug fortran/21470] New: mark subroutine arguments __restrict__ tkoenig at gcc dot gnu dot org ` (2 preceding siblings ...) 2005-05-09 15:54 ` pinskia at gcc dot gnu dot org @ 2005-08-06 19:47 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-08-06 19:47 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-06 19:47 ------- I have a fix which I need to bootstrap/test. -- What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |pinskia at gcc dot gnu dot |dot org |org Status|NEW |ASSIGNED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21470 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-08-06 19:47 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-05-09 14:47 [Bug fortran/21470] New: mark subroutine arguments __restrict__ tkoenig at gcc dot gnu dot org 2005-05-09 14:48 ` [Bug fortran/21470] " tkoenig at gcc dot gnu dot org 2005-05-09 14:53 ` [Bug tree-optimization/21470] -fargument-noalias-global has no effect for the vectorizer pinskia at gcc dot gnu dot org 2005-05-09 15:54 ` pinskia at gcc dot gnu dot org 2005-08-06 19:47 ` pinskia at gcc dot gnu dot org
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