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c { dg-do compile }
subroutine sgbcon(norm,n,kl,ku,ab,ldab,ipiv,anorm,rcond,work,iwork
&,info)
C
C -- LAPACK routine (version 3.0) --
C Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
C Courant Institute, Argonne National Lab, and Rice University
C September 30, 1994
C
C .. Scalar Arguments ..
character norm
integer info,kl,ku,ldab,n
real anorm,rcond
C ..
C .. Array Arguments ..
integer ipiv(n),iwork(n)
real ab(ldab,n),work(n)
C ..
C
C Purpose
C =======
C demonstrate g77 bug at -O -funroll-loops
C =====================================================================
C
C .. Parameters ..
real one,zero
parameter(one= 1.0e+0,zero= 0.0e+0)
C ..
C .. Local Scalars ..
logical lnoti,onenrm
character normin
integer ix,j,jp,kase,kase1,kd,lm
real ainvnm,scale,smlnum,t
C ..
C .. External Functions ..
logical lsame
integer isamax
real sdot,slamch
externallsame,isamax,sdot,slamch
C ..
C .. External Subroutines ..
externalsaxpy,slacon,slatbs,srscl,xerbla
C ..
C .. Executable Statements ..
C
C Multiply by inv(L).
C
do j= 1,n-1
C the following min() intrinsic provokes this bug
lm= min(kl,n-j)
jp= ipiv(j)
t= work(jp)
if(jp.ne.j)then
C but only when combined with this if block
work(jp)= work(j)
work(j)= t
endif
C and this subroutine call
call saxpy(lm,-t,ab(kd+1,j),1,work(j+1),1)
enddo
return
end
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