llvm-project

a0c31893 - [CodeGen][NFC] Properly split MachineLICM and EarlyMachineLICM (#113573)

[CodeGen][NFC] Properly split MachineLICM and EarlyMachineLICM (#113573) Both are based on MachineLICMBase, and the functionality there is "switched" based on a PreRegAlloc flag. This commit is simply about trusting the original value of that flag, defined by the `MachineLICM` and `EarlyMachineLICM` classes. The `PreRegAlloc` flag used to be overwritten it based on MRI.isSSA(), which is un-reliable due to how it is inferred by the MIRParser. I see that we can now define isSSA in MIR (thanks @gargaroff ), meaning the fix isn’t really needed anymore, but redefining that flag still feels wrong. Note that I'm looking into upstreaming more changes to MachineLICM, see [the discourse thread](https://discourse.llvm.org/t/extending-post-regalloc-machinelicm/82725).