Return "(c1 + c2)" instead of yet another ADD node (which made this a

no-op). llvm-svn: 46922
2008-02-10 08:10:24 +00:00 · 2008-02-10 08:10:24 +00:00 · 9c2ce9a32d
parent 2b8a52e259
commit 9c2ce9a32d
1 changed files with 1 additions and 1 deletions
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@ -923,7 +923,7 @@ SDOperand DAGCombiner::visitADD(SDNode *N) {
    return N1;
  // fold (add c1, c2) -> c1+c2
  if (N0C && N1C)
-    return DAG.getNode(ISD::ADD, VT, N0, N1);
+    return DAG.getConstant(N0C->getValue() + N1C->getValue(), VT);
  // canonicalize constant to RHS
  if (N0C && !N1C)
    return DAG.getNode(ISD::ADD, VT, N1, N0);