[PATCH] D78657: [PowerPC] Fix the liveins for ppc-expand-isel pass

[Kai Luo via Phabricator via llvm-commits]

lkail added inline comments.


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Comment at: llvm/lib/Target/PowerPC/PPCExpandISEL.cpp:390
-    // in MBB should be treated as liveins of NewSuccessor.
-    // Note: Cannot use stepBackward instead since we are using the Reg
-    // liveness state at the end of MBB (liveOut of MBB) as the liveIn for
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I notice `computeAndAddLiveIns` will call `stepBackward`, this comment says it will lead to cyclic dependence. Is it still the case for current code?


Repository:
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  https://reviews.llvm.org/D78657/new/

https://reviews.llvm.org/D78657