[llvm] [LegalizeTypes] Preserve disjoint flag when expanding OR. (PR #147640)

[Matt Arsenault via llvm-commits]

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@@ -4380,8 +4380,13 @@ void DAGTypeLegalizer::ExpandIntRes_Logical(SDNode *N,
   SDValue LL, LH, RL, RH;
   GetExpandedInteger(N->getOperand(0), LL, LH);
   GetExpandedInteger(N->getOperand(1), RL, RH);
-  Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LL, RL);
-  Hi = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LH, RH);
+
+  SDNodeFlags Flags;
+  if (N->getOpcode() == ISD::OR)
+    Flags.setDisjoint(N->getFlags().hasDisjoint());
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arsenm wrote:

Isn't this the same as just directly using the original value of N->getFlags 

https://github.com/llvm/llvm-project/pull/147640