[Bug tree-optimization/79432] [7 Regression] ICE: verify_ssa failed

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79432

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
int fn1 (void);
int __attribute__((returns_twice)) vfork (void);
void fn2 ()
{
  int a;
  a = fn1() + 2 + (vfork() + 1 + vfork());
}


live over two vfork calls.