Canonicalize ladd constant to RHS.

llvm-svn: 98058
2010-03-09 16:13:57 +00:00 · 2010-03-09 16:13:57 +00:00 · c5ff63d70f
parent f4e76cf44d
commit c5ff63d70f
1 changed files with 4 additions and 0 deletions
--- a/llvm/lib/Target/XCore/XCoreISelLowering.cpp
+++ b/llvm/lib/Target/XCore/XCoreISelLowering.cpp
@ -1105,6 +1105,10 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
    ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
    EVT VT = N0.getValueType();

+    // canonicalize constant to RHS
+    if (N0C && !N1C)
+      return DAG.getNode(XCoreISD::LADD, dl, DAG.getVTList(VT, VT), N1, N0, N2);
+
    // fold (ladd 0, 0, x) -> 0, x & 1
    if (N0C && N0C->isNullValue() && N1C && N1C->isNullValue()) {
      SDValue Carry = DAG.getConstant(0, VT);