[PATCH] D86074: [ARM][MVE] Tail-predication: check get.active.lane.mask's BTC value

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Added a related comment to D85737 <https://reviews.llvm.org/D85737>; probably makes sense to continue that discussion there.



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Comment at: llvm/lib/Target/ARM/MVETailPredication.cpp:624
+    for (auto &I : *BB) {
+      if (I.getOpcode() != Instruction::Add || &I != BTC)
+        continue;
----------------
Why are we searching the basic block here, instead of just using `dyn_cast<Instruction>(BTC)`?


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  https://reviews.llvm.org/D86074/new/

https://reviews.llvm.org/D86074