1 files changed, 16 insertions, 6 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 11ab8dc..bbbb1d9 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -58071,14 +58071,24 @@ static SDValue combineX86CloadCstore(SDNode *N, SelectionDAG &DAG) {
     Ops[3] = Op1.getOperand(0);
     Ops[4] = Op1.getOperand(1);
   } else if (Op1.getOpcode() == ISD::AND && Sub.getValue(0).use_empty()) {
+    SDValue Src = Op1;
+    SDValue Op10 = Op1.getOperand(0);
+    if (Op10.getOpcode() == ISD::XOR && isAllOnesConstant(Op10.getOperand(1))) {
+      // res, flags2 = sub 0, (and (xor X, -1), Y)
+      // cload/cstore ..., cond_ne, flag2
+      // ->
+      // res, flags2 = sub 0, (and X, Y)
+      // cload/cstore ..., cond_e, flag2
+      Src = DAG.getNode(ISD::AND, DL, Op1.getValueType(), Op10.getOperand(0),
+                        Op1.getOperand(1));
+      Ops[3] = DAG.getTargetConstant(X86::COND_E, DL, MVT::i8);
+    }
     // res, flags2 = sub 0, (and X, Y)
-    // cload/cstore ..., cond_ne, flag2
+    // cload/cstore ..., cc, flag2
     // ->
-    // res, flags2 = and X, Y
-    // cload/cstore ..., cond_ne, flag2
-    Ops[4] = DAG.getNode(X86ISD::AND, DL, Sub->getVTList(), Op1.getOperand(0),
-                         Op1.getOperand(1))
-                 .getValue(1);
+    // res, flags2 = cmp (and X, Y), 0
+    // cload/cstore ..., cc, flag2
+    Ops[4] = DAG.getNode(X86ISD::CMP, DL, MVT::i32, Src, Sub.getOperand(0));
   } else {
     return SDValue();
   }