[llvm] [GlobalIsel] Combine G_ADD and G_SUB (PR #92879)

[Matt Arsenault via llvm-commits]

Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/92879 at github.com>


arsenm wrote:

> There are no hasOneUse checks in the dag. We would need to jump into C++ for the checks.

We should have that? Arguably hasOneUse should be the default behavior for these patterns, you should need to do something to declare another use is OK 

https://github.com/llvm/llvm-project/pull/92879