[PATCH] D42837: [Loop Predication] Teach LP about reverse loops with uge and sge latch conditions

[Anna Thomas via Phabricator via llvm-commits]

anna added inline comments.


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Comment at: lib/Transforms/Scalar/LoopPredication.cpp:451
   }
-  ICmpInst::Predicate LimitCheckPred;
-  switch (LatchCheck.Pred) {
-  case ICmpInst::ICMP_ULT:
-    LimitCheckPred = ICmpInst::ICMP_ULE;
-    break;
-  case ICmpInst::ICMP_ULE:
-    LimitCheckPred = ICmpInst::ICMP_ULT;
-    break;
-  case ICmpInst::ICMP_SLT:
-    LimitCheckPred = ICmpInst::ICMP_SLE;
-    break;
-  case ICmpInst::ICMP_SLE:
-    LimitCheckPred = ICmpInst::ICMP_SLT;
-    break;
-  default:
-    llvm_unreachable("Unsupported loop latch!");
-  }
+  auto LimitCheckPred = getLatchPredicateForGuard(LatchCheck.Pred);
 
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pls land this as a separate NFC after separating out `getLatchPredicateForGuard`.


https://reviews.llvm.org/D42837