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