[Bug target/117477] Register allocator chooses a slot location instead a new callee saved register and not taking inot account pair allocation

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117477

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a testcase which shows that GCC spilling but spilling is better than
using a callee saved register by removing extra moves:
```
int test (int x), test2 (int x);

int test3(int,int,int);
int foo (int x, int y) {
    test (x);
    int lhs = test2 (y);
    int lhs1 = test2 (y);
    return test3(lhs,lhs1,x);
} 
```

So it is a wash I think.