[Bug middle-end/124250] [15 Regression] LoongArch: internal compiler error: in extract_insn, at recog.cc:2882

[chenglulu at loongson dot cn via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124250

--- Comment #4 from chenglulu <chenglulu at loongson dot cn> ---
```
typedef long long v2i64 __attribute__ ((vector_size (16), aligned (16)));
v2i64 a, b;

void
test (int l)
{
  a = b >> (-l);
}
```

This test case can trigger