[PATCH] D76153: [SimplifyCFG] try branch-to-branch simplification sooner

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added a comment.

Right now, making SimplifyCFG add freeze would block many optimization because analysis for redundant freeze removal isn't mature enough.
However, we can assess its effect to backend by updating transformations that are similar with this and happening at very late pipeline.
What I've found was `llvm/test/Transforms/CodeGenPrepare/X86/select.ll` . it converts select into br in certain cases (fdiv_true_sink).
What do you think about making the branch condition freezed? It will be a good start for having actual freeze in IR.


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  https://reviews.llvm.org/D76153/new/

https://reviews.llvm.org/D76153