[llvm] [CodeGen] Use SmallVector for MBB preds/succs (PR #101948)

[Nikita Popov via llvm-commits]

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@@ -814,7 +814,7 @@ RegionInfoBase<Tr>::getMaxRegionExit(BlockT *BB) const {
     // Get the single exit of BB.
     if (R && R->getEntry() == BB)
       Exit = R->getExit();
-    else if (++BlockTraits::child_begin(BB) == BlockTraits::child_end(BB))
+    else if (BlockTraits::child_begin(BB) + 1 == BlockTraits::child_end(BB))
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nikic wrote:

Use std::next() to make this independent of implementation details?

https://github.com/llvm/llvm-project/pull/101948