1! { dg-do compile }
2! { dg-additional-options "-Ofast" }
3! { dg-additional-options "-mavx" { target x86_64-*-* i?86-*-* } }
4
5      SUBROUTINE PASSB4 (IDO,L1,CC,CH,WA1,WA2,WA3)
6      IMPLICIT REAL(4) (A-H, O-Z)
7      DIMENSION CC(IDO,4,L1), CH(IDO,L1,4), WA1(*), WA2(*), WA3(*)
8  102 DO 104 K=1,L1
9         DO 103 I=2,IDO,2
10            TI1 = CC(I,1,K)-CC(I,3,K)
11            TI2 = CC(I,1,K)+CC(I,3,K)
12            TI3 = CC(I,2,K)+CC(I,4,K)
13            TR2 = CC(I-1,1,K)+CC(I-1,3,K)
14            TI4 = CC(I-1,2,K)-CC(I-1,4,K)
15            TR3 = CC(I-1,2,K)+CC(I-1,4,K)
16            CH(I-1,K,1) = TR2+TR3
17            CH(I,K,1) = TI2+TI3
18            CI4 = TI1-TI4
19            CH(I-1,K,4) = CI4
20            CH(I,K,4) = CI4
21  103    CONTINUE
22  104 CONTINUE
23      RETURN
24      END
25