[PATCH] D118066: [SimplifyCFG] Don't speculatively execute preductably-taken block

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

>> In general, I think we need to do the inverse. Flatten the CFG more aggressively, allow a simpler control flow that will facilitate IR-level optimizations

But you can expect perf problems due to missing optimizations with select over phi.

https://groups.google.com/g/llvm-dev/c/VcJnLMI7Deg/m/TshM3BkHCAAJ

(Or maybe GVN is now smarter..)


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https://reviews.llvm.org/D118066