eliminate some ops if they have an undef RHS

llvm-svn: 34908
2007-03-04 20:01:46 +00:00 · 2007-03-04 20:01:46 +00:00 · 362621c7ae
parent 1e04147240
commit 362621c7ae
1 changed files with 2 additions and 0 deletions
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@ -1325,6 +1325,8 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
  if (N2.getOpcode() == ISD::UNDEF) {
    switch (Opcode) {
    case ISD::ADD:
+    case ISD::ADDC:
+    case ISD::ADDE:
    case ISD::SUB:
    case ISD::FADD:
    case ISD::FSUB: