[Bug rtl-optimization/83480] [8 Regression] ICE in create_block_for_bookkeeping, at sel-sched.c:4557

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83480

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|powerpc-*-linux-gnu         |
            Summary|[8 Regression] ICE in       |[8 Regression] ICE in
                   |create_block_for_bookkeepin |create_block_for_bookkeepin
                   |g, at sel-sched.c:4557 on   |g, at sel-sched.c:4557
                   |32-bit BE powerpc target    |

--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
This is not target-specific. The following snippet compiled w/ -g -O2 (-O3,
-Ofast) -fselective-scheduling2 -ftree-vectorize
-freorder-blocks-algorithm=simple -fnon-call-exceptions
-fno-guess-branch-probability -fno-peephole2 -fno-tree-sink
-fno-tree-scev-cprop reproduces the issue for x86_64:

signed char jx, dl;

void
m9 (int zk, int f9)
{
  for (jx = 1; jx != 0; ++jx)
    {
    }

  for (;;)
    {
      int wj;

      dl %= (f9 != 0 && jx != 0) + 1;
      if (jx != 0)
        f9 = dl;

      for (wj = 0; wj < 50; ++wj)
        ++zk;

      if (jx < 1)
        {
          while (zk != 0)
            {
            }

          jx /= 0;
        }
    }
}