[PATCH] D140800: Precompute OptTable prefixes union table through tablegen

[serge via Phabricator via llvm-commits]

serge-sans-paille added a comment.

In D140800#4021282 <https://reviews.llvm.org/D140800#4021282>, @thakis wrote:

> I'm guessing on non-empty files this is a negligible win even in clang.

As showcased by https://llvm-compile-time-tracker.com/compare.php?from=4da6cb3202817ee2897d6b690e4af950459caea4&to=19a492b704e8f5c1dea120b9c0d3859bd78796be&stat=instructions:u, it's not neglectible in -O0 (and obviously even less neglictible for the preprocessing-only step)


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  https://reviews.llvm.org/D140800/new/

https://reviews.llvm.org/D140800