[InstCombine] bool mul (from memory) generated mul instead of and

```c++
bool foo(bool & a, bool & b){
return a*b;
}
```
gcc:
```asm
"foo(bool&, bool&)":
movzx eax, BYTE PTR [rdi]
and al, BYTE PTR [rsi]
ret
```
clang:
```asm
foo(bool&, bool&):
movzx eax, byte ptr [rsi]
mul byte ptr [rdi]
ret
```
https://godbolt.org/z/ex3aj3KPb

Not sure if this is a clang or InstCombine problem, but simply replacing mul with and doesn't satisfy alive2.