Fix x86's XALUO lowering to return its replacement values instead

of doing the RAUW calls for the overflow value itself. This makes
it more consistent with how the rest of LegalizeDAG works.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135788 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index d8ffccb5d8667ad81531111d0992dffe6827776b..472eb647a0eb646f5c8fbfd7bd32f5421dbc1fa9 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -9124,8 +9124,7 @@ SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
                   DAG.getConstant(X86::COND_O, MVT::i32),
                   SDValue(Sum.getNode(), 2));
 
-    DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
-    return Sum;
+    return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
   }
   }
 
@@ -9138,8 +9137,7 @@ SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
                 DAG.getConstant(Cond, MVT::i32),
                 SDValue(Sum.getNode(), 1));
 
-  DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
-  return Sum;
+  return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
 }
 
 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const{