[llvm] [VPlan] Improve code in VPlanPredicator (NFC) (PR #150416)

[Luke Lau via llvm-commits]

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@@ -133,8 +133,8 @@ VPValue *VPPredicator::createBlockInMask(VPBasicBlock *VPBB) {
   // load/store/gather/scatter. Initialize BlockMask to no-mask.
   VPValue *BlockMask = nullptr;
   // This is the block mask. We OR all unique incoming edges.
-  for (auto *Predecessor : SetVector<VPBlockBase *>(
-           VPBB->getPredecessors().begin(), VPBB->getPredecessors().end())) {
+  for (auto *Predecessor : make_range(VPBB->getPredecessors().begin(),
+                                      unique(VPBB->getPredecessors()))) {
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lukel97 wrote:

Is this correct? It looks like unique only removes equivalent elements that are consecutive to each other.

https://github.com/llvm/llvm-project/pull/150416