!fixup update verifier

Author: fhahn

llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp

@@ -185,6 +185,16 @@ bool VPlanVerifier::verifyVPBasicBlock(const VPBasicBlock *VPBB) {
     RecipeNumbering[&R] = Cnt++;
 
   for (const VPRecipeBase &R : *VPBB) {
+    if (isa<VPIRInstruction>(&R) && !isa<VPIRBasicBlock>(VPBB)) {
+      errs() << "VPIRInstructions ";
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+      R.dump();
+      errs() << " ";
+#endif
+      errs() << "not in a VPIRBasicBlock!\n";
+      return false;
+    }
+
     for (const VPValue *V : R.definedValues()) {
       for (const VPUser *U : V->users()) {
         auto *UI = dyn_cast<VPRecipeBase>(U);