[PATCH] D55909: [ARMISelLowering] Add CPSR to live-ins of newly created blocks, if required.

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet added a comment.

Could we just say that ExpandISelPseudo doesn't preserve the liveness and have it be recomputed when needed?

Basically, is the complexity we add here worth the compile time we save?
In particular, I am worried that we will do a lot of recomputations if there are a lot of copy_struct_by_val operations around, whereas we would do only one by recomputing the liveness lazily.


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  https://reviews.llvm.org/D55909/new/

https://reviews.llvm.org/D55909