[Bug rtl-optimization/78883] [avr] ICE triggered by change to combine.c (r243578)

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78883

--- Comment #3 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Simplified test case:

void foo (int *p)
{
  int i;
  for (i = 0; i < 5; i++)
    {
      if (p[i] & 1)
        return;
    }
}

$ avr-gcc -S -O1 pr78883.c