Rollup merge of #66881 - krishna-veerareddy:issue-66780-bool-ord-optimization, r=sfackler

Optimize Ord trait implementation for bool

Casting the booleans to `i8`s and converting their difference into `Ordering` generates better assembly than casting them to `u8`s and comparing them.

Fixes #66780

#### Comparison([Godbolt link](https://rust.godbolt.org/z/PjBpvF))

##### Old assembly:
```asm
example::boolean_cmp:
        mov     ecx, edi
        xor     ecx, esi
        test    esi, esi
        mov     eax, 255
        cmove   eax, ecx
        test    edi, edi
        cmovne  eax, ecx
        ret
```

##### New assembly:
```asm
example::boolean_cmp:
        mov     eax, edi
        sub     al, sil
        ret
```

##### Old LLVM-MCA statistics:
```
Iterations:        100
Instructions:      800
Total Cycles:      234
Total uOps:        1000

Dispatch Width:    6
uOps Per Cycle:    4.27
IPC:               3.42
Block RThroughput: 1.7
```

##### New LLVM-MCA statistics:
```
Iterations:        100
Instructions:      300
Total Cycles:      110
Total uOps:        500

Dispatch Width:    6
uOps Per Cycle:    4.55
IPC:               2.73
Block RThroughput: 1.0
```

0 files changed, 0 insertions, 0 deletions