[Bug tree-optimization/55459] Firefox 17: internal compiler error: in scan_tree_for_params_right_scev, at graphite-sese-to-poly.c:633

[asolokha at gmx dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55459

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |asolokha at gmx dot com

--- Comment #6 from Arseny Solokha <asolokha at gmx dot com> ---
The bug is reproducible w/ the following reduced testcase:

void
de(void)
{
  static int ey;
  static int ux;
  short int mb;
  int al;
  int vx;
  int *gs = &al;
  int *dp = &ux;
  for (ey = 0; ey < 2; ++ey)
    *dp = (mb += *gs) || vx;
}

% gcc-4.7.3 -c -O2 -ftree-loop-linear 6b94b1d3.c
6b94b1d3.c: In function 'de':
6b94b1d3.c:2:1: internal compiler error: in scan_tree_for_params_right_scev, at
graphite-sese-to-poly.c:633

gcc 4.8 and 4.9 are not affected. However, they segfault on quite a similar
code from 59817#c2.