[PATCH] D79799: [VectorCombine] add loop to enable iterative folding

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

My only concern here would be whether this can degenerate quadratically. Without particular familiarity with this pass, and looking at example `@ins1_ins1_iterate`, it seems like this would work by scalarizing one operation on each iteration. Is that right? If so, that seems potentially problematic, as the pass becomes quadratic for longer instruction chains.


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https://reviews.llvm.org/D79799