[LV] The actual change I intended to commit in r204148. Sorry for the

noise.

Original commit log:
Replace some dead code with an assert. When I first ported this pass
from a loop pass to a function pass I did so in the naive, recursive
way. It doesn't actually work, we need a worklist instead. When
I switched to the worklist I didn't delete the naive recursion. That
recursion was also buggy because it was dead and never really exercised.

llvm-svn: 204187

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -1064,14 +1064,7 @@ struct LoopVectorize : public FunctionPass {
   }
 
   bool processLoop(Loop *L) {
-    // We only handle inner loops, so if there are children just recurse.
-    if (!L->empty()) {
-      bool Changed = false;
-      for (Loop *InnerL : *L)
-        Changed |= processLoop(InnerL);
-      return Changed;
-    }
-
+    assert(L->empty() && "Only process inner loops.");
     DEBUG(dbgs() << "LV: Checking a loop in \"" <<
           L->getHeader()->getParent()->getName() << "\"\n");