[llvm-branch-commits] [llvm] [LAA] Use PSE::getSymbolicMaxBackedgeTakenCount. (PR #93499)

[Philip Reames via llvm-branch-commits]

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@@ -1506,6 +1506,16 @@ bool LoopVectorizationLegality::canVectorize(bool UseVPlanNativePath) {
       return false;
   }
 
+  if (isa<SCEVCouldNotCompute>(PSE.getBackedgeTakenCount())) {
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preames wrote:

What about the other users of LAA in tree?  Have you audited them?  If not, can you add bailouts to ensure we're not breaking anything with this transition?

https://github.com/llvm/llvm-project/pull/93499