>From a benchmark which deals with vectorizing loops, I noticed that all of the
>loops were not being
vectorized because we don't merge two BBs together.
subroutine s111 (ntimes,ld,n,ctime,dtime,a,b,c,d,e,aa,bb,cc)
c
c linear dependence testing
c no dependence - vectorizable
c
integer ntimes, ld, n, i, nl
real a(n), b(n), c(n), d(n), e(n), aa(ld,n), bb(ld,n), cc(ld,n)
real t1, t2, second, chksum, ctime, dtime, cs1d
do 1 nl = 1,2*ntimes
do 10 i = 2,n,2
a(i) = a(i-1) + b(i)
10 continue
call dummy(ld,n,a,b,c,d,e,aa,bb,cc,1.)
1 continue
return
end
Why we don't merge the loop with the label 10, I don't know.
I wonder if it is related to PR 19038.
--
Summary: not vectorizing fortran loops
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19049
