http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57370
--- Comment #6 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch>
---
Reduced testcase, which appears 'minimal' to trigger a hanging compilation at
gfortran -c -O2 -ffast-math bug.f90
> cat bug.f90
SUBROUTINE xb88_lr_adiabatic_lda_calc(e_ndrho_ndrho_ndrho, &
grad_deriv,npoints, sx)
IMPLICIT REAL*8 (t)
INTEGER, PARAMETER :: dp=8
REAL(kind=dp), DIMENSION(1:npoints) :: e_ndrho_ndrho_ndrho, &
e_ndrho_ndrho_rho
DO ii=1,npoints
IF( grad_deriv >= 2 .OR. grad_deriv == -2 ) THEN
t1425 = t233 * t557
t1429 = beta * t225
t1622 = t327 * t1621
t1626 = t327 * t1625
t1632 = t327 * t1631
t1685 = t105 * t1684
t2057 = t1636 + t8 * (t2635 + t3288)
END IF
IF( grad_deriv >= 3 .OR. grad_deriv == -3 ) THEN
t5469 = t5440 - t5443 - t5446 - t5449 - &
t5451 - t5454 - t5456 + t5459 - &
t5462 + t5466 - t5468
t5478 = 0.240e2_dp * t1616 * t973 * t645 * t1425
t5489 = 0.1600000000e2_dp * t1429 * t1658
t5531 = 0.160e2_dp * t112 * t1626
t5533 = 0.160e2_dp * t112 * t1632
t5537 = 0.160e2_dp * t112 * t1622
t5541 = t5472 - t5478 - t5523 + t5525 + &
t5531 + t5533 + t5535 + t5537 + &
t5540
t5565 = t112 * t1685
t5575 = t5545 - t5548 + t5551 + t5553 - &
t5558 + t5560 - t5562 + t5564 - &
0.80e1_dp * t5565 + t5568 + t5572 + &
t5574
t5611 = t5579 - t5585 + t5590 - t5595 + &
t5597 - t5602 + t5604 + t5607 + &
t5610
t5613 = t5469 + t5541 + t5575 + t5611
t6223 = t6189 - &
0.3333333336e0_dp * t83 * t84 * t5613 + &
t6222
t6227 = - t8 * (t5305 + t6223)
e_ndrho_ndrho_rho(ii) = e_ndrho_ndrho_rho(ii) + &
t6227 * sx
t6352 = t5440 - t5443 - t5446 - t5449 - &
t5451 - t5454 + &
0.40e1_dp * t102 * t327 * t2057 * t557 - &
t5456 + t5459 - t5462 + t5466 - &
t5468
t6363 = t5480 - t5489 + &
0.9600000000e2_dp * t1054 * t640 * t3679
t6367 = t5472 - t5474 - t5478 - t5523 + &
t5525 + t5531 + t5533 + t5535 + &
t5537 - 0.20e1_dp * t102 * t105 * t6363 + &
t5540
t6370 = t5545 - t5548 + t5551 + t5553 - &
t5558 + t5560 - t5562 + t5564 - &
0.40e1_dp * t5565 + &
t5568 + t5572 + t5574
t6373 = t5579 - t5585 + t5590 - t5595 + &
t5597 - t5602 + t5604 + t5607 + &
t5610
t6375 = t6352 + t6367 + t6370 + t6373
t6380 = - 0.3333333336e0_dp * t83 * t84 * t6375 + t5701
t6669 = -t4704 - t8 * (t6344 + t6380 + t6665)
e_ndrho_ndrho_ndrho(ii) = e_ndrho_ndrho_ndrho(ii) + &
t6669 * sx
END IF
END DO
END SUBROUTINE xb88_lr_adiabatic_lda_calc
