[llvm] [VPlan] Model branch cond to enter scalar epilogue in VPlan. (PR #92651)

[Florian Hahn via llvm-commits]

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@@ -448,11 +449,15 @@ VPBasicBlock::createEmptyBasicBlock(VPTransformState::CFGState &CFG) {
 }
 
 void VPIRBasicBlock::execute(VPTransformState *State) {
-  assert(getHierarchicalSuccessors().empty() &&
-         "VPIRBasicBlock cannot have successors at the moment");
-
+  assert(getHierarchicalSuccessors().size() <= 2);
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fhahn wrote:

I think at the moment 2 is the maximum for any block, would probably be good to also check in the verifier.

https://github.com/llvm/llvm-project/pull/92651