[Bug rtl-optimization/49472] [4.7 regression] Compiler segfault on valid code

[janus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49472

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |janus at gcc dot gnu.org

--- Comment #3 from janus at gcc dot gnu.org 2011-06-20 12:12:31 UTC ---
Slightly reduced test case:


module MassiveNu
  implicit none

contains

  subroutine Nu_derivs
    integer, parameter :: dl = KIND(1.d0)
    integer, parameter :: nqmax0 = 3

    real(dl) :: adotoa,aq,aqdot,vdot, g1(nqmax0+1)
    integer :: iq

    do iq=2,(nqmax0+1)
    aq=1./((iq-1.5d0)*1.)
    aqdot=aq*adotoa
    vdot=-aq*aqdot/(1.+aq*aq)**1.5d0
    g1(iq)=vdot
    end do

    call dummy(g1)

  end subroutine

end module 



This fails with

Program received signal SIGSEGV, Segmentation fault.
0x0000000000b27430 in simplify_const_unary_operation (code=Cannot access memory
at address 0x7fffff7fefec) at /home/jweil/gcc47/trunk/gcc/simplify-rtx.c:1212