gcc/testsuite/gfortran.dg/pr68379-2.f

   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