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Jessica Paquette 3b906a1bea [GlobalISel] Add convenience matchers for nots and all-ones constants
Add a convenience matcher which handles

```
G_XOR %not_reg, -1
```

And a convenience matcher which returns true if an integer constant is
all-ones.

Differential Revision: https://reviews.llvm.org/D91459
2020-11-13 13:54:08 -08:00
..