http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53787
Bug #: 53787
Summary: Possible lto improvement
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: [email protected]
ReportedBy: [email protected]
For following Fortan test t.f90 icc can propagate loop counter value and then
perform complete unroll and gcc doesn't do it
real x(10)
n = 10
call init(x,n)
print *, x
end
subroutine init(x, n)
real x(10)
do i=1,n
x(i) = i*i + 1
enddo
return
end
Not sure it's completely lto problem though...
ifort flags - -O3 -ipo -inline-level=0
gfortran flags - -O3 -flto -fwhole-program -fno-inline
