David Majnemer 902acde341 [InstCombine] Optimize away certain additions using modular arithmetic ...

We can turn:
```
  %add = add i8 %arg, C1
  %and = and i8 %add, C2
  %cmp = icmp eq i1 %and, C3
```

into:
```
  %and = and i8 %arg, C2
  %cmp = icmp eq i1 %and, (C3 - C1) & C2
```

This is only worth doing if the sequence is the sole user of the addition
operation.

2024-10-28 22:51:35 +00:00

332 KiB

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