Make early exit hasPredecessorHelper return true. NFCI.

All uses conservatively assume in early exit case that it will be a
predecessor. Changing default removes checking code in all uses.

llvm-svn: 327169

1 files changed, 1 insertions, 5 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index ba06f6266ed..d0e2f918278 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -13102,14 +13102,10 @@ bool DAGCombiner::checkMergeStoreCandidatesForDependencies(
       Worklist.push_back(n->getOperand(j).getNode());
   }
   // Search through DAG. We can stop early if we find a store node.
-  for (unsigned i = 0; i < NumStores; ++i) {
+  for (unsigned i = 0; i < NumStores; ++i)
     if (SDNode::hasPredecessorHelper(StoreNodes[i].MemNode, Visited, Worklist,
                                      Max))
       return false;
-    // Check if we ended early, failing conservatively if so.
-    if (Visited.size() >= Max)
-      return false;
-  }
   return true;
 }