adjust for llvm 14

Signed-off-by: Sidorov, Dmitry <dmitry.sidorov@intel.com>

lib/SPIRV/SPIRVReader.cpp

@@ -3059,17 +3059,21 @@ static void validatePhiPredecessors(Function *F) {
     for (PHINode &Phi : BB.phis()) {
       SmallVector<Value *> Vs;
       SmallVector<BasicBlock *> Bs;
-      for (auto [V, B] : zip(Phi.incoming_values(), Phi.blocks())) {
-        unsigned N = PredsCnt[B];
-        Vs.insert(Vs.end(), N, V);
-        Bs.insert(Bs.end(), N, B);
+      auto Vals = Phi.incoming_values();
+      auto Blocks = Phi.blocks();
+      auto *VIt = Vals.begin();
+      auto *BIt = Blocks.begin();
+      for (; VIt != Vals.end() && BIt != Blocks.end(); ++VIt, ++BIt) {
+        const unsigned N = PredsCnt[*BIt];
+        Vs.insert(Vs.end(), N, *VIt);
+        Bs.insert(Bs.end(), N, *BIt);
       }
       unsigned I = 0;
-      for (unsigned N = Phi.getNumIncomingValues(); I < N; ++I) {
+      for (const unsigned N = Phi.getNumIncomingValues(); I < N; ++I) {
         Phi.setIncomingValue(I, Vs[I]);
         Phi.setIncomingBlock(I, Bs[I]);
       }
-      for (unsigned N = Vs.size(); I < N; ++I)
+      for (const unsigned N = Vs.size(); I < N; ++I)
         Phi.addIncoming(Vs[I], Bs[I]);
     }
   }