[PATCH] D145772: [Instcombine] Canonicalize all <=> patterns to (a>b)-(a<b)

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 added a comment.

In D145772#4192188 <https://reviews.llvm.org/D145772#4192188>, @nikic wrote:

> Was this abandoned because it breaks some of the existing optimizations? For the record, this is how the compare-3way.ll test diff looks like: https://gist.github.com/nikic/056516a0d621f9ca69059d05eef7e7b2

Yeah, I haven't found a quick way to fix the test failures. So, I abandon it for now. Need more time to detect the canonicalized form in `matchThreeWayIntCompare`.


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https://reviews.llvm.org/D145772