[LLE] Fix SingleSource/Benchmarks/Polybench/stencils/jacobi-2d-imper …

…with Polly

We can actually have dependences between accesses with different
underlying types.  Bail in this case.

A test will follow shortly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262267 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/LoopLoadElimination.cpp

@@ -429,6 +429,11 @@ class LoadEliminationForLoop {
     unsigned NumForwarding = 0;
     for (const StoreToLoadForwardingCandidate Cand : StoreToLoadDependences) {
       DEBUG(dbgs() << "Candidate " << Cand);
+      // Only progagate value if they are of the same type.
+      if (Cand.Store->getPointerOperand()->getType() !=
+          Cand.Load->getPointerOperand()->getType())
+        continue;
+
       // Make sure that the stored values is available everywhere in the loop in
       // the next iteration.
       if (!doesStoreDominatesAllLatches(Cand.Store->getParent(), L, DT))