[PATCH] D30161: [LoopPeeling] Peel loops with invariant backedge Phi input

[Philip Reames via Phabricator via llvm-commits]

reames added inline comments.


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Comment at: lib/Transforms/Utils/LoopUnrollPeel.cpp:118
+    PHINode *Phi;
+    for (auto BI = Header->begin(); (Phi = dyn_cast<PHINode>(&*BI)); ++BI) {
+      Value *Input = Phi->getIncomingValueForBlock(BackEdge);
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Out of curiosity, why the complexity about finding the backedge?  Wouldn't *all* of the inputs to the phi be loop invariant in the case you're interested in?


https://reviews.llvm.org/D30161