[PATCH] D53057: [WebAssembly] Handle undefined lane indices in SIMD patterns

[Heejin Ahn via Phabricator via llvm-commits]

aheejin added a comment.

Could you give an example of what kind of programs would generate `undef`s in the IR and why we need this?


Repository:
  rL LLVM

https://reviews.llvm.org/D53057