Recommitting Craig Topper's patch now that r296476 has been recommitted.

When checking if chain node is foldable, make sure the intermediate nodes have a single use across all results not just the result that was used to reach the chain node.

This recovers a test case that was severely broken by r296476, my making sure we don't create ADD/ADC that loads and stores when there is also a flag dependency.

llvm-svn: 297698

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index fb1c3bcea59..123938646a3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -3355,7 +3355,7 @@ void SelectionDAGISel::SelectCodeCommon(SDNode *NodeToMatch,
       // a single use.
       bool HasMultipleUses = false;
       for (unsigned i = 1, e = NodeStack.size()-1; i != e; ++i)
-        if (!NodeStack[i].hasOneUse()) {
+        if (!NodeStack[i].getNode()->hasOneUse()) {
           HasMultipleUses = true;
           break;
         }