[Bug ipa/118973] [15 regression] ICE when building glog-0.6.0 (single_succ_edge, at basic-block.h:332)

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118973

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
```
int foo() __attribute__((returns_twice));

void a() {
  int a;
  if(foo()) new int;
  &a;
}
```