[llvm] [GlobalISel] Combine G_ZEXT of undef -> 0 (PR #113764)

[Craig Topper 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/113764 at github.com>


topperc wrote:

If the match function indicates that a change is being made, but the change is never made, won't that cause the combiner to iterate repeatedly?

https://github.com/llvm/llvm-project/pull/113764